LabVIEW™SignalExpress™HelpJune2008,371268J-01LabVIEWSignalExpressisaninteractivemeasurementprogramyoucanusetoquicklyacquire,analyze,andpresentdatafromhundredsofdataacquisitiondevicesandinstruments,withnoprogrammingrequired.UseLabVIEWSignalExpresstocreateprojectsthatacquire,analyze,create,generate,anddisplaysignals.Youcanacquiresignalsfromhardwaredevicesinstalledonyourcomputer,analyzethesignals,andthensendtheresultingsignalstohardwaredevices.ThestepsyouusetocreateprojectsdependontheLabVIEWSignalExpressassistantsyouhaveinstalled.Refertothedocumentationforanassistanttolearnmoreaboutcreatingprojectswithassistant-specificsteps.YoucanuseLabVIEWSignalExpressstepsthatcommunicatewithNIhardwaredevices,oryoucanimportLabVIEWVIstocommunicatewithhardwaredevices.Youalsocanuseasweepoperationtorepeatedlymeasureasignalwithdifferentparametervalues.

SoundandVibrationAssistantHelpUsetheSoundandVibrationstepstobuildsoundandvibrationapplicationsinteractively.TheSoundandVibrationAssistantisanextensionoftheLabVIEWSignalExpressenvironmentandincludesallLabVIEWSignalExpressfunctionality.TheSoundandVibrationAssistantoffersacustomizedviewintheAddStepmenutohelpyouaccessthemostcommonsoundandvibrationmeasurements.SoundandVibrationAssistantStepscontainsfurtherinformationonusingSoundandVibrationAssistant.Tonavigatethishelpfile,usetheContents,Index,andSearchtabstotheleftofthiswindow.Formoreinformationaboutthishelpfile,refertothefollowingtopics:UsingHelpRelatedDocumentationImportantInformationTechnicalSupportandProfessionalServices©2004–2008NationalInstrumentsCorporation.Allrightsreserved.

What'sNewinLabVIEWSignalExpress

What'sNewinLabVIEWSignalExpress3.0LabVIEWSignalExpress3.0includesthefollowingchangesfromLabVIEWSignalExpress2.5.

EnvironmentEnhancementsLabVIEWSignalExpress3.0includesthefollowingenvironmentenhancements.GeneralEnvironmentEnhancementsTheLabVIEWSignalExpressenvironmentincludesthefollowinggeneralenhancements:

Drag-and-droplayoutarrangement—Youcanusedrag-and-dropfunctionalitytocustomizetheappearanceofLabVIEWSignalExpressbymovingviews,includingtheProjectView,ChannelView,contexthelp,andtabs.Autohidefunctionality—Youcanspecifytohideviewswhenyoumovethecursoroutoftheview.

DataViewTabEnhancementsTheDataViewtabincludesthefollowingenhancements:

Displayproperties—YoucanusetheDisplayPropertiesdialogboxtoconfigurepropertiesforalltypesofdisplays.ThisdialogboxreplacestheWaveformGraphPropertiesdialogboxinLabVIEWSignalExpress2.5andearlier.Thedisplaypropertiesyoucanconfiguredependontheformatofthedisplayandcanincludetitles,formatandprecision,plots,scales,cursors,signalorder,andadvancedsettings.ClickthePropertiesbuttonontheDataViewtaborright-clickadisplayandselectPropertiesfromtheshortcutmenutodisplaytheDisplayPropertiesdialogbox.Displaytitles—Displaysappearwithtitlesbydefault.YoucanusetheTitlepageoftheDisplayPropertiesdialogboxtoeditorhidedisplaytitles.Graphpalette—Thegraphpalettereplacesthezoombuttonsongraphdisplays.ThegraphpalettealsoappearswithgraphsyouaddtotheProjectDocumentationtab.Cursorenhancements—Youcanlinkcursorsonthesamedisplayorbetweendisplays,exportmeasurementvaluesfromthecursorlegendtotheProjectViewsoyoucanusethevalueasastepinput,andbindcursormeasurementvaluestostepparameterssotheparametertowhichyoubindacursormeasurementupdatestousethatvalue.Youalsocandefineapeakthreshold

andwidthforeachcursoronadisplay.UsetheCursorspageoftheDisplayPropertiesdialogboxtoconfigurecursors.

ProjectViewEnhancementsInLabVIEWSignalExpress3.0,theProjectViewdisplaysstepsenclosedinexecutionloops.Anexecutionloopenclosesthestepsinanexecutiongroup,whichisagroupofstepsthatsendsignalstoandreceivesignalsfromeachother.Ifyouaddastepthatdoesnotreceiveasignalfromprevioussteps,thenewstepappearsenclosedinanewexecutionloop.Stepsinseparateexecutiongroupsdonotsendsignalstoorreceivesignalsfromeachotherwhenyouruntheproject.ExecutionloopsreplacetheexecutionseparatorsthatappearinLabVIEWSignalExpress2.5andearlier.ChannelViewEnhancementsTheChannelViewincludesthefollowingenhancements:

SharedVariablesmode—YoucanusetheChannelViewtoviewsharedvariablesonthelocalmachineorthelocalnetwork.SelectSharedVariablesfromtheViewpull-downmenuatthetopoftheChannelViewtodisplaytheavailablesharedvariables.WhenyouplaceacheckmarkintheAcquirecheckboxforasharedvariable,LabVIEWSignalExpressautomaticallyconfiguresaReadSharedVariablesstepandaddsthesteptotheProjectView.ImportChannelViewfromExcel—IfyouexportthecontentsoftheChannelViewtoMicrosoftExcel,youcanimportthecontentsoftheMicrosoftExcelspreadsheetbackintotheChannelView.UsethisfeaturetoshareChannelViewconfigurationsacrossprojectsortoupdatetheChannelViewifyoumodifytheinformationintheMicrosoftExcelspreadsheet.

ProjectDocumentationTabEnhancementsTheProjectDocumentationtabincludesthefollowingenhancements:

Thefollowingtoolbarbuttonsappearonthetab:PrintDocumentation,SelectFont,Left,Centered,andRight.Usethesebuttonstoprintthecontentsofthetab,configurefontsettings,andsetparagraphalignment.YoucanundoorredooperationsonthetabusingtheEditmenuorkeyboardshortcuts.

Objectsyouplaceonthetabappearwithhandlesyoucanusetoresizetheobject.YoucanselecttoviewthecontentsofthetabastheyappearonaprintedpageoraWebpageusingtheDocumentationmenu.

RunModeEnhancementsYoucanconfigureLabVIEWSignalExpresstorunaprojectforanumberofiterationsyouspecifyorforanamountoftimeyouspecify.Bydefault,LabVIEWSignalExpressrunsprojectscontinuouslywhenyouclicktheRunbutton.ClickthedownarrowontheRunbuttonandselectRunContinuously,RunOnce,orConfigureRuntospecifytherunmodeyouwanttouse.YoualsocanaccessrunmodeconfigurationoptionsfromtheOperatemenu.WhenyouselectConfigureRun,theConfigureRundialogboxappears.Usethisdialogboxtospecifyanumberofiterationsoratimeinsecondsforwhichyouwanttoruntheproject.Youalsocanspecifywhethertocreateasnapshotofallthesignalsintheprojectwhentheprojectfinishesrunning.Whenyousaveaproject,LabVIEWSignalExpressalsosavestherunmodeconfiguration.

NoteInaPlaybackworkarea,youonlycanrunprojectscontinuously.

LoggingEnhancementsLabVIEWSignalExpress3.0includesthefollowingdataloggingenhancements.EventDetectionUsetheEventspageoftheRecordingOptionstabtoconfigureeventsthatyouwantLabVIEWSignalExpresstoacknowledgeduringlogging.Youcanconfigurekeystrokeeventsorsignal-basedevents.LabVIEWSignalExpresssaveseventsinthelogfile,andyoucanspecifyanannotationtoappearwheretheeventoccursonthegraphoftheloggedsignal.Youalsocanspecifytoprompttheusertoenteranannotationwhenakeystrokeeventoccurs.Right-clickasignalintheLoggedDatawindowandselectShowAlarmsandEventsfromtheshortcutmenutodisplayarecordofalltheeventsandalarmsthatoccurredduringlogging.StartandStopConditionEnhancementsUsetheStartConditionsandStopConditionspagesoftheRecordingOptionstabtoconfigurestartandstopconditions.TheStartConditionsandStopConditionspagesincludethefollowingneworenhancedoptions:

Conditiontype—YoucanspecifySoftwaretriggerasastartorstopcondition.Conditionlogic—Ifyouspecifymultiplestartorstopconditions,youalsocanspecifythelogicLabVIEWSignalExpressusestoprocesstheconditions.Youcanacknowledgethestartorstopconditionswhenallconditionsoccur,whenoneconditionoccurs,orwhenalltheconditionsoccurinaspecificorder.Count—YoucanspecifythenumberoftimesastartorstopconditionmustoccurbeforeLabVIEWSignalExpressacknowledgesthestartorstopcondition.Schedulestarttime—YoucanconfigurerepeatingDate/Timestartconditions.YoucanscheduleLabVIEWSignalExpresstostartloggingweekly,daily,hourly,insmallertimeincrements,oronacustomscheduleyouspecify.Restartbehavior—YoucanconfigurehowmanytimesLabVIEWSignalExpressrestartsloggingafterstartandstopconditions

occur.Youcanconfigureloggingtorestartanumberoftimesyouspecifyoruntilatimeanddateyouspecify.Youalsocanspecifywhethertosaveloggeddatainthesamelogfileorinanewfileafterarestartoccurs.Holdoff—YoucanspecifyanamountoftimethatLabVIEWSignalExpresswaitsafterastartorstopconditionoccursbeforeacknowledginganewstartorstopcondition.Post-stopconditionduration—Youcanspecifyanumberofsecondsofdatatoincludeinalogfileafterastopconditionoccurs.

AlarmEnhancementsUsetheAlarmspageoftheRecordingOptionstabtoconfigurealarms.Inadditiontoactionssuchasdisplayingamessageorproducingasoundwhenanalarmoccurs,younowcangenerateasoftwaretrigger,createasnapshot,orrunaprogram.LoggingFrequency-DomainSignalsYoucanlogthelastknownvalueofafrequency-domainsignalandviewthelogontheDataViewtab.Thelastknownvalueofthesignalisthevalueofthesignalwhentheprojectstopsrunning.IntheProjectView,right-clickafrequency-domainoutputsignalandselectRecordlastvaluefromtheshortcutmenutologthelastknownvalueofthesignal.LabVIEWSignalExpresssaveslogsoffrequency-domainsignalsinthe.tdmsfileformattothedefaultlocationyouspecifyontheLoggingpageoftheOptionsdialogbox.

NoteBecauseLabVIEWSignalExpressrecordsafrequency-domainsignalasasinglevalue,youcannotplaybackalogofafrequency-domainsignal.

OperatorModeOperatormodeprovidesawaytodisableeditingcapabilitiesforLabVIEWSignalExpressprojects.Disablingeditingcapabilitiescanbeusefulifyouwanttodistributeaprojecttootherusers.Forexample,ifyoucreateaprojectthatgeneratesasignal,youcanconfiguretheprojectsothatinoperatormodeauseronlycanadjustthefrequencyofthesignal.Youalsocansetapasswordonaprojectsothatausermustenterthepasswordtodisableoperatormode.Ifyousaveaprojectinoperatormode,theprojectalwaysopensinoperatormodeunlessyousavetheprojectagainwithoperatormodedisabled.UsetheOperatorInterfaceviewandtheToolboxandPropertieswindowstoconfigurethecontrolsausercanaccesswhenaprojectisinoperatormode.UsetheOperatemenuorthetoolbarbuttonsontheOperatorInterfaceviewtoenableordisableoperatormodeandtosetapasswordonaproject.

SharedVariablesYoucanwritesignalstosharedvariables,whichareapplication-independentsoftwareitemsthatenableyoutosenddataacrossprojectsoracrossanetwork.Right-clickastepinputoroutputsignalandselectWritetoSharedVariablefromtheshortcutmenutowritethesignaltoasharedvariable.YoualsocanusetheChannelViewtoseethesharedvariablesthatexistonthelocalmachineorthelocalnetwork.

ExportingProjectSettingsYoucanexporttheconfigurationsettingsofaLabVIEWSignalExpressprojecttoanXMLfile.YoucanusetheXMLfileasarecordoftheprojectconfigurationatthetimeyouexportthesettings.TheXMLfiledisplaysallthestepsintheproject,thevaluesofeveryparameterinthosesteps,andlistsanyenvironmentelements,suchastabs,workareas,andactivelogs,thatLabVIEWSignalExpresshasloadedatthetimeyouexporttheprojectsettings.UsetheFilemenutoexportprojectsettingstoXML.YoucanviewthefileinanytextorXMLeditor.

NoteTheXMLfileisforrecord-keepingpurposesonly.YoucannotusetheXMLfiletoimportprojectsettingstoLabVIEWSignalExpress.

NewStepThefollowingnewstepappearsinLabVIEWSignalExpress3.0:

Sequencestep—Pausesandresumesexecutionofstepsinaprojectbasedontheconfigurationyouspecify.TheSequencestepcanpausetheexecutionofastepwithoutstoppingtheexecutionoftheentireproject.BecausetheSequencestepcanpausetheexecutionofothersteps,youcanusetheSequencesteptoallowmultiplestepsinthesameprojecttousethesamehardware.

What'sNewinLabVIEWSignalExpress2.5LabVIEWSignalExpress2.5includesthefollowingchangesfromLabVIEWSignalExpress2.0.

ProjectAnalyzerTheProjectAnalyzerisatoolthatanalyzesyourLabVIEWSignalExpressprojectandreturnsanyerrors,warnings,incompatibilities,orotherissuesintheErrorListwindow.TheProjectAnalyzerdeterminesthetaskyouwanttocompleteandreturnspotentialissueswiththecurrentLabVIEWSignalExpressconfigurationthatcanpreventtheprojectfromexecutingproperly.

NewStepThefollowingstephasbeenadded:

CreateDigitalSignalstep

StepChangesLabVIEWSignalExpressincludesthefollowingchangestoexistingsteps:

CreateSignal—TheCreateSignalstepisnowcalledtheCreateAnalogSignalstep.SoftwareTrigger—TheSoftwareTriggerstepisnowcalledtheTriggerstep.

What'sNewinLabVIEWSignalExpress2.0LabVIEWSignalExpress2.0includedthefollowingchangesfromLabVIEWSignalExpress1.1.

DataLoggingUsetheintegrateddataloggingtooltorecord,save,andanalyzeyourmeasurements.Youcanrecordanystepoutput.Youalsocananalyzeandprocessloggeddatabyplayingitthroughanalysissteps.

WorkAreasUseworkareastoperformmultipleLabVIEWSignalExpressoperationsfromwithinthesameproject.

NewStepsThefollowingstepshavebeenadded:

ReadSharedVariablesstepStatisticsstepTriggerstep

StepImprovementsLabVIEWSignalExpressincludesthefollowingchangestoexistingsteps:

TimeAveraging—TheTimeAveragingstepnowacceptsscalardataasaninput.Histogram—TheHistogramstepnowacceptsscalardataasaninput.Userstep—TheUserstepisnowcalledtheRunLabVIEWVIstep.TheRunLabVIEWVIstepnowsupportsLabVIEW7.1andlater.Formula(Scalar)—TheFormula(Scalar)stepisnowcalledtheFormulastep.TheFormulastepnowacceptswaveformdataasaninput.LimitTest—YounowcanperformactionsonLabVIEWSignalExpressdatadependingontheresultoftheLimitTeststep.NavigatetotheActionstaboftheLimitTestconfigurationviewtoconfigurewhichactionsLabVIEWSignalExpresstakeswhenasignalfailsorpassesalimittest.

StepRemovalsLabVIEWSignalExpressnolongercontainsthefollowingsteps:

NI-DAQmxAcquireNI-DAQmxGenerate

NoteLabVIEWSignalExpressstillsupportsthesestepsforprojectfilessavedinapreviousversionofLabVIEWSignalExpress.InstalltheDAQAssistantandusetheDAQmxAcquireandDAQmxGeneratestepstoacquireandgeneratesignalsfromDAQdevices.

ChannelViewTheChannelViewprovidesanintegratedenvironmentforviewingandconfiguringhardwarechannelinformation.

DAQAssistantIntegrationLabVIEWSignalExpressnowsupportsfullDAQAssistantintegration.TheDAQAssistantdialogboxesarefullyintegratedintheLabVIEWSignalExpressenvironment.WhenyouinstalltheDAQAssistant,usetheDAQmxAcquireandDAQmxGeneratestepstoacquireandgeneratesignalsfromDAQdevices.

GroupingYoucanusedatagroupingtoanalyzemultipledatachannelsatonce.

NewDataViewersSeveralnewdataviewersareavailableforviewingscalarandtime-domaindata.Right-clicktheDataViewandselectViewAstochoosethedisplaytouseforyourdata.LabVIEWSignalExpressonlydisplaysthedataviewersavailableforthespecifieddatatype.

ProjectDocumentationTabYoucancreateprojectdescriptions,displayacquireddata,ordocumentyourmeasurementresultsintheProjectDocumentationtab.

OptionsDialogBoxSelectTools»OptionstodisplaytheOptionsdialogbox.UsetheOptionsdialogboxtoconfigurevariousLabVIEWSignalExpressoptions.

SnapshotsSnapshotsallowyoutosavearecordofthecurrentvaluesofallstepoutputsinyourproject.

ActivatingYourSoftwareHowdoIactivatemysoftware?UsetheNIActivationWizardtoobtainanactivationcodeforyoursoftware.YoucanlaunchtheNIActivationWizardtwoways:

Launchtheproductandchoosetoactivateyoursoftwarefromthelistofoptionspresented.LaunchNILicenseManagerbyselectingStart»AllPrograms»NationalInstruments»NILicenseManager.ClicktheActivatebuttoninthetoolbar.

NoteIfyoursoftwareisapartofaVolumeLicenseAgreement(VLA),contactyourVLAadministratorforinstallationandactivationinstructions.

Whatisactivation?Activationistheprocessofobtaininganactivationcodetoenableyoursoftwaretorunonyourcomputer.Anactivationcodeisanalphanumericstringthatverifiesthesoftware,version,andcomputerIDtoenablefeaturesonyourcomputer.Activationcodesareuniqueandarevalidononlyonecomputer.WhatistheNIActivationWizard?TheNIActivationWizardisapartofNILicenseManagerthatstepsyouthroughtheprocessofenablingsoftwaretorunonyourmachine.WhatinformationdoIneedtoactivate?Youneedyourproductserialnumber,username,andorganization.TheNIActivationWizarddeterminestherestoftheinformation.Certainactivationmethodsmayrequireadditionalinformationfordelivery.Thisinformationisusedonlytoactivateyourproduct.CompletedisclosureofNationalInstrumentslicensingprivacypolicyisavailableatni.com/activate/privacy.Ifyouoptionallychoosetoregisteryoursoftware,yourinformationisprotectedundertheNationalInstrumentsprivacypolicy,availableatni.com/privacy.HowdoIfindmyproductserialnumber?YourserialnumberuniquelyidentifiesyourpurchaseofNIsoftware.YoucanfindyourserialnumberontheCertificateofOwnershipincludedin

yoursoftwarekit.IfyoursoftwarekitdoesnotincludeaCertificateofOwnership,youcanfindyourserialnumberontheproductpackingsliporontheshippinglabel.Ifyouhaveinstalledapreviousversionusingyourserialnumber,youcanfindtheserialnumberbyselectingtheHelp»AboutmenuitemwithintheapplicationorbyselectingyourproductwithinNILicenseManager(Start»AllPrograms»NationalInstruments»NILicenseManager).YoucanalsocontactyourlocalNationalInstrumentsbranch.WhatisaComputerID?ThecomputerIDcontainsuniqueinformationaboutyourcomputer.NationalInstrumentsrequiresthisinformationtoenableyoursoftware.YoucanfindyourcomputerIDthroughtheNIActivationWizardorbyusingNILicenseManager,asfollows:

1. LaunchNILicenseManagerbyselectingStart»AllPrograms»NationalInstruments»NILicenseManager.

2. ClicktheDisplayComputerInformationbuttoninthetoolbar.Formoreinformationaboutproductactivationandlicensingrefertoni.com/activate.

RelatedDocumentationTheGettingStartedwithLabVIEWSignalExpressmanualisaPortableDocumentFormat(PDF)file.YoumusthaveAdobeReader6.0.1orlaterinstalledtoviewthePDF.RefertotheAdobeSystemsIncorporatedWebsitetodownloadAdobeReader.RefertotheNationalInstrumentsProductManualsLibraryforupdateddocumentationresources.DependingontheLabVIEWSignalExpresssupportedapplicationsyouhaveinstalled,theHelpmenucontainslinkstotheusermanualforeachapplication.ThefollowingdocumentscontaininformationthatyoumightfindhelpfulasyouuseLabVIEWSignalExpress:

NI-DAQmxHelp—Thishelpfilecontainsinformationabouttasks,channels,andotherNI-DAQmxconcepts.LabVIEWHelp—ThishelpfilecontainsinformationaboutLabVIEWpalettes,menus,tools,VIs,andfunctions.Thishelpfilealsoincludesstep-by-stepinstructionsforusingLabVIEWfeatures.

LabVIEWSignalExpressLELabVIEWSignalExpressLEisafree,limitedversionofLabVIEWSignalExpressthatdoesnotincludeallofthestepsorfeaturesavailableintheFullEdition.WhenyouinstallLabVIEWSignalExpress,youhavea30-daytrialoftheFullEditionofLabVIEWSignalExpress.Afterthatperiod,youmustactivateLabVIEWSignalExpressLEorpurchasetheFullEdition.IfyouactivateLabVIEWSignalExpressLEbeforethe30-daytrialoftheFullEditioniscomplete,youstillcanusethefullfeaturesfortheremainderofthe30-daytrial.

LabVIEWSignalExpressLEFeaturesBydefault,LabVIEWSignalExpressLEdisplaysallsteps,includingstepsthatareonlyavailableintheFullEdition.YoucanconfigureLabVIEWSignalExpressnottodisplaystepsavailableintheFullEdition.SelectTools»OptionstodisplaytheOptionsdialogbox.OntheGeneralpage,selectNofromtheShowunlicensedstepsoption.ThefollowingtabledisplaysthefeaturesavailableinLabVIEWSignalExpressLEandLabVIEWSignalExpressFullEdition:

LabVIEWSignal

ExpressLE

LabVIEWSignalExpressFullEdition

InstrumentSupportOver300commonstandaloneinstrumentsVisualizationandDocumentationCustomizablegraphingInteractivecursorsSavesignalstofilePrintandexportgraphsDraganddropdataintoMicrosoftExcel,Word,andWordPadOperatormodewithlimiteduser-editingSignalProcessingSoftwarefiltersScalarandwaveformmathAnaloganddigitalconversionInteractivesignalcomparisonsLoadsimulationdatafromPSPICE,Multisim,andotherSPICEpackagesTimeandFrequencyMeasurements

AmplitudeandlevelTimingandtransitionPowerspectrumFrequencyresponseDistortionmeasurementsToneextractionDataLoggingLimiteddatalogging(onelogperproject)UnlimiteddataloggingLoggingalarmsandeventsLoggingwithstartandstopconditionsMeasurementAutomationParametersweepingLimittestingSoftwaretriggeringSequencingRemoteDataAccessRead/Writesharedvariables

HowdoIgethelp?LabVIEWSignalExpressincludesadynamiccontexthelpwindowthatdisplaysstep,tab,andparameter-levelhelp.Movethecursoroveranobjecttodisplaycontexthelpforthatobject.YoualsocanselectHelp»LabVIEWSignalExpressHelptoaccesstheLabVIEWSignalExpressHelp.

UsingHelpConventionsNavigatingHelpSearchingHelpPrintingHelpFileTopics

ConventionsThishelpfileusesthefollowingformattingandtypographicalconventions:

<> Anglebracketsthatcontainnumbersseparatedbyanellipsisrepresentarangeofvaluesassociatedwithabitorsignalname—forexample,AO<0..3>.

[] Squarebracketsencloseoptionalitems—forexample,[response].

» The»symbolleadsyouthroughnestedmenuitemsanddialogboxoptionstoafinalaction.ThesequenceFile»PageSetup»OptionsdirectsyoutopulldowntheFilemenu,selectthePageSetupitem,andselectOptionsfromthelastdialogbox.Thisicondenotesatip,whichalertsyoutoadvisoryinformation.Thisicondenotesanote,whichalertsyoutoimportantinformation.

blue Textinthiscolordenotesaspecificplatformandindicatesthatthetextfollowingitappliesonlytothatplatform.

bold Boldtextdenotesitemsthatyoumustselectorclickinthesoftware,suchasmenuitemsanddialogboxoptions.Boldtextalsodenotesparameternames.

green Underlinedtextinthiscolordenotesalinktoahelptopic,helpfile,orWebaddress.

italic Italictextdenotesvariables,emphasis,cross-references,oranintroductiontoakeyconcept.Italictextalsodenotestextthatisaplaceholderforawordorvaluethatyoumustsupply.

monospace Textinthisfontdenotestextorcharactersthatyoushouldenterfromthekeyboard,sectionsofcode,programmingexamples,andsyntaxexamples.Thisfontisalsousedforthepropernamesofdiskdrives,paths,directories,programs,subprograms,subroutines,devicenames,functions,operations,variables,filenames,andextensions.

monospacebold

Boldtextinthisfontdenotesthemessagesandresponsesthatthecomputerautomaticallyprintstothescreen.Thisfontalsoemphasizeslinesofcodethataredifferentfromtheotherexamples.

monospaceitalic

Italictextinthisfontdenotestextthatisaplaceholderforawordorvaluethatyoumustsupply.

NavigatingHelpTonavigatethishelpfile,usetheContents,Index,andSearchtabstotheleftofthiswindoworusethefollowingtoolbarbuttonslocatedabovethetabs:

Hide—Hidesthenavigationpanefromview.Locate—LocatesthecurrentlydisplayedtopicintheContentstab,allowingyoutoviewrelatedtopics.Back—Displaysthepreviouslyviewedtopic.Forward—DisplaysthetopicyouviewedbeforeclickingtheBackbutton.Options—Displaysalistofcommandsandviewingoptionsforthehelpfile.

SearchingHelpUsetheSearchtabtotheleftofthiswindowtolocatecontentinthishelpfile.Ifyouwanttosearchforwordsinacertainorder,suchas"relateddocumentation,"addquotationmarksaroundthesearchwordsasshownintheexample.SearchingfortermsontheSearchtaballowsyoutoquicklylocatespecificinformationandinformationintopicsthatarenotincludedontheContentstab.

WildcardsYoualsocansearchusingasterisk(*)orquestionmark(?)wildcards.Usetheasteriskwildcardtoreturntopicsthatcontainacertainstring.Forexample,asearchfor"prog*"liststopicsthatcontainthewords"program,""programmatically,""progress,"andsoon.Usethequestionmarkwildcardasasubstituteforasinglecharacterinasearchterm.Forexample,"?ext"liststopicsthatcontainthewords"next,""text,"andsoon.

NoteWildcardsearchingwillnotworkonSimplifiedChinese,TraditionalChinese,Japanese,andKoreansystems.

NestedExpressionsUsenestedexpressionstocombinesearchestofurtherrefineasearch.YoucanuseBooleanexpressionsandwildcardsinanestedexpression.Forexample,"exampleAND(programORVI)"liststopicsthatcontain"exampleprogram"or"exampleVI."Youcannotnestexpressionsmorethanfivelevels.

BooleanExpressionsClickthe buttontoaddBooleanexpressionstoasearch.ThefollowingBooleanoperatorsareavailable:

AND(default)—Returnstopicsthatcontainbothsearchterms.Youdonotneedtospecifythisoperatorunlessyouareusingnestedexpressions.OR—Returnstopicsthatcontaineitherthefirstorsecondterm.NOT—Returnstopicsthatcontainthefirsttermwithoutthesecondterm.NEAR—Returnstopicsthatcontainbothtermswithineightwordsofeachother.

SearchOptions

UsethefollowingcheckboxesontheSearchtabtocustomizeasearch:Searchpreviousresults—Narrowstheresultsfromasearchthatreturnedtoomanytopics.Youmustremovethecheckmarkfromthischeckboxtosearchalltopics.Matchsimilarwords—Broadensasearchtoreturntopicsthatcontainwordssimilartothesearchterms.Forexample,asearchfor"program"liststopicsthatincludethewords"programs,""programming,"andsoon.Searchtitlesonly—Searchesonlyinthetitlesoftopics.

PrintingHelpFileTopicsCompletethefollowingstepstoprintanentirebookfromtheContentstab:

1. Right-clickthebook.2. SelectPrintfromtheshortcutmenutodisplaythePrintTopics

dialogbox.3. SelectthePrinttheselectedheadingandallsubtopicsoption.

NoteSelectPrinttheselectedtopicifyouwanttoprintthesingletopicyouhaveselectedintheContentstab.

4. ClicktheOKbutton.

PrintingPDFDocumentsThishelpfilemaycontainlinkstoPDFdocuments.ToprintPDFdocuments,clicktheprintbuttonlocatedontheAdobeAcrobatViewertoolbar.

NavigatingtheLabVIEWSignalExpressEnvironmentTheLabVIEWSignalExpressenvironmentconsistsofviewsthatdisplayvarioustypesofinformation.Theprimaryviewappearsinthemiddleoftheapplicationwindowandcontainstabsinthedefaultlayout.Eachtabhasauniquefunctionality,suchasdisplayingdata,configuringsteps,ordocumentingprojects.Theprimaryviewissurroundedbysupplementaryviewsthat,unlessyouclosetheviews,arealwaysvisible.SupplementaryviewsincludetheProjectView,whichyouusetobuildprojects,theContextHelpwindow,whichdisplaysinformationabouttabsandsteps,andtheChannelView,whichdisplaysconfigurableitemssuchashardwaredevicesandsharedvariables.TheToolboxandPropertieswindowsalsoaresupplementaryviews.

NoteWhenyoufirstlaunchLabVIEWSignalExpress,theDataViewtabappearsintheprimaryview,andtheProjectViewandtheContextHelpwindowappearassupplementaryviews.IfLabVIEWSignalExpressdetectshardwaredevicesorsharedvariables,theChannelViewalsoappears.However,youcancustomizetheLabVIEWSignalExpressenvironmenttodisplayanyviewinanylocation.

MenusandtoolbarbuttonsappearacrossthetopoftheLabVIEWSignalExpressenvironment.Usethemenusandtoolbarbuttonstomanagefiles,accesssteps,runprojects,recordlogs,modifytheenvironment,andaccesshelp.Forexample,youcanusetheViewmenutodisplayviewsinLabVIEWSignalExpress.

ViewsTheLabVIEWSignalExpressenvironmentconsistsofviewsthatdisplayvarioustypesofinformation.Theprimaryviewappearsinthemiddleoftheapplicationwindowandisusuallythelargestview.Inthedefaultlayout,theprimaryviewcontainstabs,suchastheDataViewtab.Supplementaryviewssurroundtheprimaryviewandappearwithindividualtitlebars.Forexample,theProjectViewisasupplementaryview.YoucancustomizetheappearanceoftheLabVIEWSignalExpressenvironmentbyselectingwhichviewstodisplay,specifyinghowLabVIEWSignalExpressdisplaystheviews,andarrangingtheviewsintheapplicationwindow.

ViewDisplayOptionsTodisplayaview,selecttheviewfromtheViewmenu.Afteryoudisplayaview,youcanchooseoneofthefollowingmethodsfordisplayingtheview:

Floating—Displaystheviewinaseparate,floatingwindow.Hiding—Hidestheviewwhenyoumovethecursoroutoftheview.LabVIEWSignalExpressplacesbuttonsontheedgeoftheapplicationwindowtoindicateahiddenview.Movethecursoroverthebuttontodisplaythehiddenview.Docking—Dockstheviewinafixedlocation.

DisplayingViewsYoucancustomizetheappearanceoftheLabVIEWSignalExpressenvironmentbyselectingviewstodisplay,specifyinghowLabVIEWSignalExpressdisplaystheviews,andarrangingtheviewsintheapplicationwindow.SelectaviewfromtheViewmenutodisplaytheview.

Floating,Hiding,andClosingViewsThemethodyouusetofloat,hide,dock,orcloseaviewdependsonwhethertheviewappearsasaprimaryvieworasupplementaryview.

NoteWiththeexceptionoftheDataViewtab,closedviewsretainanyinformationyouenterpriortoclosingtheview.Forexample,closingtheProjectViewdoesnotremovethestepsintheproject.

Ifaviewappearsasatabintheprimaryviewarea,youcanright-clickthenameofthetabtodisplayashortcutmenuofdisplayoptions.SelectFloattomakethetabafloatingvieworClosetoclosethetab.YoualsocanclicktheX,orClosebutton,intheprimaryviewtocloseatab.Afteryoumakeatabafloatingview,youcandragtheviewoverthedockingiconstodocktheview.Ifaviewappearsasasupplementaryviewwithatitlebar,youcanclickthedownarrowonthetitlebartodisplayadrop-downmenuofdisplayoptions.TheFloatandCloseoptionsworkinthesamewayforprimaryandsupplementaryviews.SupplementaryviewsalsoincludeanAutoHideoption,whichyoucanusetohidetheviewwhenyoumovethecursoroutoftheview.YoualsocanusetheAutoHideandX,orClosebuttonsonthetitlebarofasupplementaryviewtohideorclosetheview.

DraggingandDockingViewsYoucandragafloatingvieworaviewwithatitlebaroveradockingicontodocktheviewinanewlocation.Thefollowingillustrationshowsthedockingiconsthatappearnearthemiddleoftheapplicationwindowwhenyoubegindraggingaview.

Dragaviewoveradockingicontoseewheretheviewappearsifyoudroptheview.Ifyoudragaviewoverthemiddle,tabbedicon,theviewappearstabbedwhenyoudroptheview.

ResettingtheEnvironmentLayoutSelectView»ResetLayouttoresettheLabVIEWSignalExpressenvironmenttothedefaultlayout.

NoteResettingthelayoutclosesanyviewsthatdonotappearinthedefaultlayout.WiththeexceptionoftheDataViewtab,closedviewsretainanyinformationyouenterpriortoresettingthelayout.

ProjectViewTheProjectViewdisplaysthefunctionalstepsofaLabVIEWSignalExpressproject.YoucreateprojectsbyaddingstepstotheProjectView.

StepsStepsarefunctionsyoucanconfiguretoacquire,analyze,save,orloadsignalsintheproject.Eachstepconsistsofinputsignalsand/oroutputsignals.

Stepinputsignalsaresignalsyoupassintoastepthatyouwanttoanalyze,process,generate,orsave.Stepinputsignalsappearasredarrowsonastep.

Stepoutputsignalsaresignalsastepcreates,acquires,analyzes,processes,orimportsandreturns.Youcanusestepoutputsignalsasinputstosubsequentsteps.Stepoutputsignalsappearasbluearrowsonastep.YoucandraganoutputsignaltotheDataVieworuseaprobetoviewthedatatheoutputsignalholds.

YoumustaddstepstotheProjectViewinalogicalexecutionsequence.Ifasteprequiresaninputsignalfromanotherstep,thestepprovidingtheinputmustappearbeforethestepthatrequirestheinput.Ifyouaddastepthatcannotfindaninputitneedsorthatcannotprocessthedataaprecedingsteporstepsreturn,anerrormessageappearsthatexplainswheretheerroroccurredandsuggestswaystofixtheerror.

ExecutionLoopsExecutionloopsareblueloopsthatshowtheexecutionofstepsintheProjectView.Anexecutionloopenclosesthestepsinanexecutiongroup,whichisagroupofstepsthatsendsignalstoandreceivesignalsfromeachother.Ifyouaddastepthatdoesnotreceiveasignalfromprevioussteps,thenewstepispartofanewexecutiongroupandappearsenclosedinanewexecutionloop.Stepsinseparateexecutiongroupsdonotsendsignalstoorreceivesignalsfromeachotherwhenyouruntheproject.LabVIEWSignalExpressdeterminesexecutiongroupsautomaticallybasedontheorderinwhichstepsappearintheProjectView.Stepsthatprovideoutputsignalsmustappearabovestepsthatrequirethosesignalsasinputs.Becausestepsinoneexecutiongroupdonothavedependenciesonstepsinotherexecutiongroups,separateexecutiongroupsexecuteindependentlyofeachother.IfyouaddasteptotheProjectViewordragasteptoapositionwherethestepcanreceivesignalsfromsomeprecedingstepsbutnotothers,thestepappearsenclosedinanewexecutionloop,andlettersappearinthebottomrightcornerofeachexecutionloopintheproject.Thelettersindicatewhichstepsareinthesameexecutiongroup.Thefollowingillustrationshowsexecutionloopswithletters.TheexecutionloopsthatshowtheletterAcontainstepsthatexecuteaspartofthesamegroupwhenyouruntheproject.TheexecutionloopthatshowstheletterBexecutesindependently.

Ifanexecutionloopbecomesdividedintotwoloops,youcancombinetheloopsbydraggingstepsbetweenthesectionsoftheexecutionloop.ThefollowingillustrationshowsthesameprojectafteryoudragthestepfromthesecondAlooptothefirstAloop.LettersappearonexecutionloopsonlywhenthenumberofexecutionloopsintheProjectViewexceedstheactualnumberofexecutiongroups.

LabVIEWSignalExpressalwaysdrawsanewexecutionloopifyoudragastepthatrequiresaninputsignaltoalocationwhereitnolongercandeterminewhichinputsignaltouse.Whenyouspecifytheinputsignal

youwanttouse,LabVIEWSignalExpressautomaticallymovesthestepintotheappropriateexecutionloop.

ConfiguringtheProjectViewYoucanusetheOptionsdialogboxtoconfiguretheProjectViewtoshoworhidethestatusbar,showorhideinputsandoutputsofsteps,anddisplaylargeorsmalliconsinsteps.

TabsTabsappearintheprimaryviewinthedefaultLabVIEWSignalExpressenvironmentlayout.Usethetabstodisplaydata,configurestepsandoperations,documentprojects,andviewerrors,warningsandnotifications.Eachtabhasaspecificfunctionality,andyoudonotneedtouseeverytabforeveryproject.SelectatabfromtheViewmenutodisplaythetab.ClicktheX,orClosebutton,orright-clickatabandselectClosefromtheshortcutmenutocloseatab.

NoteWiththeexceptionoftheDataViewtab,closedtabsretainanyinformationyouenterpriortoclosingthetab.Forexample,closingtheProjectDocumentationtabdoesnoterasethedocumentationyouenteronthetab.

LabVIEWSignalExpressincludesthefollowingtabs:EventLog—Displayseventssuchaserrors,warnings,andalarmsthatoccurinLabVIEWSignalExpress.Foreachevent,theEventLogtabdisplaystheseverityoftheeventandthetimetheeventoccurred,aswellasthesourceandtitleoftheevent,ifknown.DataView—Displayssignalsanddatafromstepsingraphs,charts,andotherdisplayformats.RecordingOptions—Configuresloggingoperations.ProjectDocumentation—Displaysdocumentationthatyoucreateforthecurrentproject.Youcanentertext,importimages,anddragsignalsfromtheProjectViewtotheProjectDocumentationtab.StepSetup—Configuresstepsintheproject.

NoteSomeprograms,suchasNI-DAQmx,installadditionaltabs.

ContextHelpTheContextHelpwindowdisplaysinformationaboutviewsandstepsandappearsontherightsideoftheLabVIEWSignalExpressapplicationwindowinthedefaultlayout.TheContextHelpwindowissplitintotwosections.ThetopsectiondisplaysbasicinformationaboutavieworstepwhenyoumovethecursorintotheviewortheStepSetuptab.Thebottomsectiondisplaysparameter-specificinformationwhenyoumovethecursoroveraparameterontheStepSetuptabforastep.IftheContextHelpwindowisnotvisible,selectHelp»ContextHelptodisplaytheContextHelpwindow.

AddStepPaletteTheAddSteppalettecontainsthestepsyouusetobuildLabVIEWSignalExpressprojects.Thestepsappearinsubpalettesbasedonthefunctionalityofthestep.ClicktheAddStepbuttontodisplaytheAddSteppalette.Atemporaryversionofthepaletteappears.IfyouclickoutsideoftheAddSteppalette,thepalettedisappears.Clickthethumbtackintheupperleftcornerofthepalettetopinthepalettesoitisnolongertemporary.TheorderofstepsintheAddSteppaletteisidenticaltotheorderofstepsintheAddStepmenu.Youcanuseeitherthepaletteorthemenutoaddstepstoaproject.

UsingProjectsLabVIEWSignalExpressprojectsarecollectionsofstepsthatcanacquire,analyze,create,generate,display,andlogsignals.Thefunctionalityofaprojectdependsonthestepsyouusetobuildtheproject.Forexample,youcanusetheIVIScopeAcquirestepandtheFiltersteptocreateaprojectthatacquiresasignalfromanoscilloscopeandfiltersthesignal.SelectFile»NewProjecttocreateanew,emptyproject.YouthencanbuildtheprojectbyaddingstepstotheProjectView.YoualsocancreatemultipleworkareastoperformmultipleLabVIEWSignalExpressoperationsfromwithinthesameproject.Whenyousavetheproject,LabVIEWSignalExpresssavesalltheworkareasintheproject.LabVIEWSignalExpresssavesprojectswitha.seprojfileextension.LabVIEWSignalExpressalsosavestheenvironmentlayoutforaproject.Forexample,ifyousaveaprojectwithonlytheDataViewandEventLogtabsvisible,theDataViewandEventLogappearbydefaultthenexttimeyouopentheproject.However,youcanmodifytheLabVIEWSignalExpressenvironmentatanytime.

StepsStepsarefunctionsyoucanconfiguretoacquire,analyze,save,orloadsignalsinaproject.Eachstepconsistsofinputsignalsand/oroutputsignals,andhasaspecificfunctionality.Forexample,theFilterstepfiltersasignalusinganinfiniteimpulseresponse(IIR)orfiniteimpulseresponse(FIR)filter,andtheTimeAveragingstepaveragesatimesignalorscalarinput.ThefollowingimageshowstheCreateAnalogSignalstepasitappearsintheProjectView.

Thearrowsthatappearonastepindicatewhetherthestepprocessesinputsignals,generatesoutputsignals,ordoesboth.ThebluearrowinthepreviousimageindicatesthattheCreateAnalogSignalstepgeneratesanoutputsignal.

Stepinputsignalsaresignalsyoupassintoastepthatyouwanttoanalyze,process,generate,orsave.InputsignalsappearasredarrowsonastepintheProjectView.

Stepoutputsignalsaresignalsastepcreates,acquires,analyzes,processes,orimportsandreturns.Youcanuseoutputsignalsasinputstosubsequentsteps.OutputsignalsappearasbluearrowsonastepintheProjectView.YoucandraganoutputsignaltotheDataVieworuseaprobetoviewthedatatheoutputsignalholds.

DataTypeiconsdenotethesignaltypeofstepinputsignalsandstepoutputsignals.UsetheAddSteppaletteortheAddStepmenutoaddstepstoaproject.

ConfiguringStepsEveryLabVIEWSignalExpressstephasabasicfunctionality,butyoucanconfigurethesteptospecifytheinputsignalsitprocesses,theoutputsignalsitcreates,orthewayinwhichitperformsaspecificaction.Forexample,youmustspecifythetypeoffilteryouwanttheFiltersteptouse.UsetheStepSetuptabtoconfigureastep.TheStepSetuptabappearsautomaticallywhenyouaddasteptotheProjectView.

ResettingorRestartingStepsSomestepsperformprocessesthatdependonmultipleiterations.ThesestepsmustruninRunContinuousmodetoprovideaccurateresults.Forexample,theFiltersteprequiressomesettlingtimetoacquireenoughdatatofilterasignalcorrectly.Theamountoftimethesestepsmustruntoprovideaccurateresultsdependsontheinputsignalofthestep.StepsthatrequiremultipleiterationstoproduceaccurateresultsappearwithaResetorRestartbuttoninthetoolbaroftheStepSetuptab.ClickingtheResetorRestartbuttonresetsthesteptoitsinitialstateandrestartstheprocessesofthestep.

AddingandDeletingStepsClicktheAddStepbuttononthetoolbarandselectastepfromtheAddSteppalettetoaddasteptotheProjectView.Youalsocanright-clicktheProjectViewandselectastepfromtheshortcutmenuorselectastepfromtheAddStepmenu.AfteryouaddasteptotheProjectView,youcanright-clickthestepandselectInsertBeforeorInsertAfterfromtheshortcutmenutoaddanothersteptotheProjectView.YoualsocanaddasteptotheProjectViewbyright-clickinganoutputsignalonastepandselectingSendTofromtheshortcutmenu.Theshortcutmenudisplaysalistofstepsthatcanhandletheoutputsignal.Whenyouselectastepfortheoutputsignal,LabVIEWSignalExpressplacesthestepintheProjectViewbelowthestepyouoriginallyright-clicked.ToremoveastepfromtheProjectView,selectthestepandpressthe<Delete>keyorright-clickthestepandselectDeletefromtheshortcutmenu.

StepExecutionGroupsInaproject,stepsthatsendsignalstoandreceivesignalsfromeachotherexecutetogetherasanexecutiongroup.Thetimingoftheexecutionofindividualstepsinanexecutiongroupdependsonfactorssuchassignalinheritanceandhardwareconfiguration.Forexample,astepthatanalyzesasignalcannotexecuteuntilitreceivesthesignalfromaprevioussteporaninstrument.StepsinanexecutiongroupappearenclosedinablueexecutionloopintheProjectView.Youcancreateprojectswheretwoormoregroupsofstepsexecuteindependentlyofeachother.Stepsinoneexecutiongroupdonotreceivesignalsfromstepsinotherexecutiongroups.Forexample,ifyouaddtwoCreateAnalogSignalstepstotheProjectView,thestepsappearinseparateexecutionloops,asshowninthefollowingimage,becausethesecondCreateAnalogSignalstepdoesnotreceiveasignalfromthefirstCreateAnalogSignalstep.

Whenyouruntheproject,bothCreateAnalogSignalstepsexecuteconcurrentlybecauseonestepdoesnotneedtowaitontheotherstep.LabVIEWSignalExpressdetermineswhetherstepscanexecuteinthesamegroupautomatically.Forexample,ifyoumodifythepreviousexampletoaddanArithmeticstepafterthesecondCreateAnalogSignalstep,allthreestepsappearinoneloop,asshowninthefollowingillustration,becausetheArithmeticstepreceivesdatafrombothCreateAnalogSignalsteps.

Whenyouruntheproject,bothCreateAnalogSignalstepsexecute,thentheArithmeticstepexecutes.IfyouaddtwomoreCreateAnalogSignalstepsandanotherArithmeticstepafterthefirstArithmeticstep,thenewstepsappearinaseparateexecutionloopbecausethesecondgroupdoesnotreceivedatafromthefirstgroup.Thetwogroupsexecuteindependentlywhenyouruntheproject.Commonusesformultipleexecutiongroupsinthesameprojectincludecreatingmulti-rateapplicationsandsimultaneouslysendingtwodifferentsignalstotwodifferenthardwaredevicesrunningattwodifferentspeeds.Youalsocancreateprojectswheresomestepsrunindependentlyofothersinthesameexecutiongroup.Forexample,ifyouaddaCreateAnalogSignalstep,aFilterstep,andaScalingandConversionsteptotheProjectViewandconfigureboththeFilterstepandtheScalingandConversionsteptousetheoutputsignaloftheCreateAnalogSignalstepasaninput,theFilterstepandtheScalingandConversionstepexecuteconcurrently.TheScalingandConversionstepdoesnothavetowaitfortheFiltersteptofinishexecuting.BothstepsexecuteimmediatelyaftertheCreateAnalogSignalstepexecutes.Ifyouconfigureanindependentlyexecutingstepincorrectly,anerroroccursatthatstep,andthestepstopsexecutinganddoesnotreturnasignal.However,otherstepsthatarenotdependentonthatstepforasignalcontinuetoexecute.

AcquiringSignalsMostprojectsyoucreateusingLabVIEWSignalExpressanalyzeorlogsignalsyouacquirefromadataacquisitiondeviceormodularinstrument.LabVIEWSignalExpressprovidesthefollowingmethodsforacquiringsignals:

AcquiringSignalsUsingUSBPlug-and-Play—IfyouuseLabVIEWSignalExpresswithanNIUSBdevice,suchasNICompactDAQ,theNIDeviceMonitorthatinstallswithNI-DAQmxsoftwaredetectswhenyouconnectthedevicetothePC.UseUSBplug-and-playfunctionalityifyouwantLabVIEWSignalExpresstoconfiguredataacquisitionandbeginacquiringsignalsautomatically.AcquiringSignalsUsingtheChannelView—IfyouuseLabVIEWSignalExpresswithNI-DAQmxorNI-DMMdevicesorNISwitchmodules,theChannelViewdisplaysallanaloginput(AI)channelsavailableforthedeviceormodule.YoucanusetheChannelViewtoacquiresignalsfromthesupporteddevices.

NoteYoucaninstallNI-DAQmx,NI-DMM,orNISwitchsoftwarefromtheNationalInstrumentsDeviceDriverDVD,oryoucandownloadthelatestversionofNI-DAQmx,NI-DMM,orNISwitchsoftwarefromni.com/downloads.AcquiringSignalsUsingSteps—YoucanusetheAcquireSignalsstepstoacquiresignalsfromahardwaredevice.YoucanusetheIVIstepstoacquiresignalsfromhardwareofthespecifiedIVIclass.SomeNImodularinstruments,suchasNI-DMM,NI-SCOPE,andNI-HSDIOalsoinstallinstrument-specificAcquireSignalssteps.

AcquiringSignalsUsingUSBPlug-and-PlayIfyouuseLabVIEWSignalExpresswithanNIUSBdevice,suchasNICompactDAQ,theNIDeviceMonitordetectswhenyouconnectthedevicetothePC.LabVIEWSignalExpressthencansetupaprojectautomaticallyandbeginacquiringsignalsfromthedevicewithminimaluserinput.

NoteTheNIDeviceMonitorinstallswithNI-DAQmx.YoucaninstallNI-DAQmxsoftwarefromtheNationalInstrumentsDeviceDriverDVD,oryoucandownloadthelatestversionofNI-DAQmxsoftwarefromni.com/downloads.AfteryouinstallNI-DAQmx,refertotheNI-DAQmxHelpformoreinformationaboutusingNI-DAQmx.

CompletethefollowingstepstoacquiresignalsfromanNIUSBdeviceusingLabVIEWSignalExpress.

1. UseaUSBcabletoconnectthedevicetothePC.2. Turnonthedevice.3. (Optional)Ifyouhavenotalreadydoneso,installanynecessary

softwareforthedevice.WindowsVistainstallsdevice-specificsoftwareautomaticallywhenitdetectsanewdevice.OnWindowsXPandearlier,theFoundNewHardwarewizardpromptsyoutoinstallthesoftware.

4. IntheNewDataAcquisitionDevicedialogboxthatappears,selectBeginaMeasurementwithThisDeviceUsingNILabVIEWSignalExpressandclicktheOKbutton.ALabVIEWSignalExpresswindowwithanimageofthedeviceappears.

Youcanaddmodulestothedeviceatthistimeandtheimageautomaticallyupdatestodisplaythenewmodules.Refertothedevicedocumentationformoreinformationaboutthemodulesyoucanusewithaspecificdevice.

5. SelectthemodulesfromwhichtoacquiresignalsandclicktheOKbutton.LabVIEWSignalExpresslaunchesandrunsaprojectthatacquiressignalsfromthemodulesyouselected.

NoteIfyouselectmodulesthatgeneratesignals,suchasanalogoutput(AO)modules,LabVIEWSignalExpresspromptsyoufor

inputsignalstouseforthegeneratedsignals.

AcquiringSignalsUsingtheChannelViewIfyouuseLabVIEWSignalExpresswithinstalledorsimulatedNI-DAQmxdevicesorwithanNI-DMMdeviceorNISwitchmodule,youcanusetheChannelViewtoacquiresignalsfromallanaloginput(AI)channelsavailableforthedevicesormodules.LabVIEWSignalExpressautomaticallydetectsallthedevicestheChannelViewsupportsanddisplaysthemintheChannelView.YoucaninstallNI-DAQmx,NI-DMM,orNISwitchsoftwarefromtheNationalInstrumentsDeviceDriverDVD,oryoucandownloadthelatestversionofNI-DAQmx,NI-DMM,orNISwitchsoftwarefromni.com/downloads.

NoteTheChannelViewdoesnotdisplayanalogoutput(AO)channels.

CompletethefollowingstepstoacquiresignalsfromasupporteddeviceormoduleusingtheChannelView.

1. InstallthedeviceandconnectittothePC,oruseMeasurementandAutomationExplorer(MAX)tocreateasimulateddevice.Refertothedevicedocumentationformoreinformationaboutinstallingadevice.

NoteMAXinstallswithmostNationalInstrumentssoftwareapplications.RefertotheMeasurement&AutomationExplorerHelpformoreinformationaboutcreatingNI-DAQmxsimulateddevices.

2. InLabVIEWSignalExpress,selectView»ChannelViewtodisplaytheChannelView.LabVIEWSignalExpressdisplaysthedevicesitdetectsinthePhysicalChannelcolumn.Ifyoudonotseethedeviceyouwanttouse,clicktheRefreshbuttontoupdatetheChannelView.

3. Clicktheexpandsymbolforthedevicefromwhichyouwanttoacquiresignalstodisplaythedevicechannels.

4. PlaceacheckmarkintheAcquirecheckboxforeachchannelfromwhichyouwanttoacquireasignal.Ifyouwanttoacquiresignalsfromallchannels,placeacheckmarkintheAcquirecheckboxforthedeviceitself.

WhenyouplaceacheckmarkinanAcquirecheckbox,additional

measurementconfigurationoptionsappearintheChannelViewtable,andLabVIEWSignalExpressautomaticallyplacesadataacquisitionstepintheProjectView.Themeasurementconfigurationoptionsthatappeardependonthedeviceyouuse.

5. (Optional)Usethemeasurementconfigurationoptionstoconfiguresettingsfortheacquisition.Forexample,formostdevicesyoucanspecifytheMeasurementTypeandScaledUnitstouseforthemeasurement.YoualsocanusethePropertieswindowtoconfiguremultiplechannelssimultaneously.

6. DragtheoutputsofthedataacquisitionsteptotheDataViewandclicktheRunbuttontoruntheproject.LabVIEWSignalExpressacquiressignalsfromthedeviceanddisplaysthesignalsintheDataView.

AcquiringandGeneratingSignalsUsingStepsYoucanusetheAcquireSignalsstepsandtheGenerateSignalsstepstoacquireorgeneratesignalsfromahardwaredevice.YoucanusetheIVIstepstoacquireorgeneratesignalsfromhardwareofthespecifiedIVIclass.SomeNImodularinstruments,suchasNI-DMM,NI-SCOPE,andNI-HSDIOalsoinstallinstrument-specificAcquireSignalsandGenerateSignalssteps.UsestepstoacquiresignalswhenyouareusingadevicethatdoesnotsupportUSBplug-and-playsignalacquisitionorthatLabVIEWSignalExpresscannotdetectautomaticallyusingtheChannelView.Youalsocanusestepswhenyouwanttouseadevicetogenerateasignal.Forexample,ifyouwanttogenerateasignalfromananalogoutput(AO)devicethatdoesnotsupportUSBplug-and-playfunctionality,youcanusetheGenerateSignalsstepstoconfigurethedevice.Completethefollowingstepstoacquireorgenerateasignalusingsteps.

1. InstallthedeviceandconnectittothePC,oruseMeasurementandAutomationExplorer(MAX)tocreateasimulateddevice.Refertothedevicedocumentationformoreinformationaboutinstallingadevice.

NoteMAXinstallswithmostNationalInstrumentssoftwareapplications.RefertotheMeasurement&AutomationExplorerHelpformoreinformationaboutcreatingNI-DAQmxsimulateddevices.

2. SelecttheappropriatestepfromtheAddSteppaletteortheAddStepmenutoaddthesteptotheProjectView.

3. UsetheStepSetuptabtoconfiguretheAcquireSignalsorGenerateSignalsstep.

4. (Optional)IfyouselectaGenerateSignalsstep,addasteptotheProjectViewbeforetheGenerateSignalssteptoprovidetheformofthesignalyouwanttogenerate.Forexample,youcanusetheCreateAnalogSignalsteptogenerateasimplesinewaveorothersignal.

5. ClicktheRunbuttontoruntheprojectandbeginacquiringorgeneratingthesignal.

RunningandStoppingProjectsWhenyourunaproject,LabVIEWSignalExpressexecutesallthestepsthattheprojectcontainsuntilyoustoporaborttheproject.

RunningProjectsClicktheRunbuttontorunaLabVIEWSignalExpressproject.LabVIEWSignalExpresspromptsyoutoconfiguretherunmodeforaprojectthefirsttimeyouclicktheRunbuttonafterlaunchingLabVIEWSignalExpress.Bydefault,LabVIEWSignalExpressrunsprojectscontinuouslywhenyouclicktheRunbutton.However,youcanconfigureLabVIEWSignalExpresstorunaprojectonce,foranumberofiterationsyouspecify,orforanamountoftimeyouspecify.Afteryouconfiguretherunmode,theiconontheRunbuttonupdatestoreflecttheconfiguration.

StoppingProjectsWhenaprojectisrunning,theStopbuttonreplacestheRunbutton.ClicktheStopbuttontostoptheproject.WhenyouclicktheStopbutton,theprojectstopswhenthecurrentiterationoftheprojectcompletes.Projectsyouconfiguretorunonce,runforaspecificnumberofiterations,orrunforaspecificamountoftimestopautomaticallywhenthestopconditionoccurs.

AbortingProjectsInsomecasesyoucannotstopaproject,suchaswhenahardwarestepwaitsonatriggerthatdoesnotoccur.Inthiscaseyoumustaborttheprojecttostopexecution.YoucanclickthedownarrowontheStopbuttonandselectAbortfromtheshortcutmenutohalttheexecutionofaprojectimmediately.Becauseabortingaprojectdoesnotwaitforthefinaliterationoftheprojecttocomplete,selectingtheAbortoptionmightcauseLabVIEWSignalExpresstodisplayincompletedata.

NoteYoualsocanusetheoptionsintheOperatemenutorun,stop,orabortaproject.

DocumentingProjectsUsetheProjectDocumentationtabtocreatedocumentationforaLabVIEWSignalExpressproject.Youcanentertextonthetab,importimages(GIF,JPG,BMP,PNG,orEMF)fromotherlocationsordragsignalsfromtheProjectViewtotheProjectDocumentationtab.

DisplayingSignalGraphsWhenyoudragasignalfromtheProjectViewtotheProjectDocumentationtab,thesignalappearsinagraphthatissimilartoagraphontheDataViewtab.Right-clickagraphontheProjectDocumentationtabtoseethesameshortcutmenuoptionsthatappearforgraphsontheDataViewtab.Forexample,youcanusetheshortcutmenutoadddisplays,setvisibleitems,selectsignals,andchangegraphproperties.UsetheresizinghandlestoresizethegraphontheProjectDocumentationtab.Youalsocanusethezoombuttonstochangetheportionofthesignalthegraphdisplays.LiketheDataViewtab,theProjectDocumentationtabdisplaysthePreviewGraphwhenyouzoominonasignal.UsethePreviewGraphtoselecttheportionofthesignaltodisplay.Youcanright-clickthesignalgraphandselectVisibleItems»PreviewGraphfromtheshortcutmenutoshoworhidethePreviewGraph,oryoucanright-clickthePreviewGraphandselectHidePreviewfromtheshortcutmenutohidethePreviewGraph.Whenyouruntheproject,thesignalsontheProjectDocumentationtabupdatetodisplaythecurrentvaluesofthesignalswhiletheprojectruns.Whenyouprintprojectdocumentation,LabVIEWSignalExpressprintsthemostrecentvalueofthesignal.UsetheoptionsintheDocumentationmenuorthetoolbarbuttonsontheProjectDocumentationtabtoconfiguredisplayoptionsandfontsettings,alignparagraphs,insertimages,orsetthesizeofobjectsontheProjectDocumentationtab.

PrintingandExportingDocumentationYoucanprintLabVIEWSignalExpressdocumentationthatyoucreateontheProjectDocumentationtaborexportthedocumentationtoHTML.Toprintdocumentation,clickthePrintDocumentationtoolbarbuttonontheProjectDocumentationtab,orselectFile»Print»PrintDocumentation.IftheProjectDocumentationtabincludesgraphsofsignals,LabVIEWSignalExpressprintsthemostrecentvalueofthesignal.ToexportdocumentationtoHTML,selectFile»Export»ExportDocumentationtoHTML,specifythefilenamefortheHTMLfileyouwanttocreate,andclicktheSavebutton.

ExportingProjectSettingstoXMLYoucanexporttheconfigurationsettingsofaLabVIEWSignalExpressprojecttoanXMLfile.YoucanusetheXMLfileasarecordoftheprojectconfigurationatthetimeyouexportthesettings.SelectFile»Export»ExportProjectSettingsToXMLtoexportthecurrentconfigurationsettingsofaprojecttoanXMLfile.YoucanviewtheXMLfileinanytextorXMLeditor.TheXMLfiledisplaysallthestepsintheproject,thevaluesofeveryparameterinthosesteps,andlistsanyenvironmentelements,suchastabs,workareas,andactivelogs,thatLabVIEWSignalExpresshasloadedatthetimeyouexporttheprojectsettings.LabVIEWSignalExpressformatsthedataintheXMLfilesoyoueasilycanidentifythevalue(s),name(s),andtype(s)ofthedatafromthetagsthatdescribethedata.TheXMLfileisforrecord-keepingpurposesonly.YoucannotusetheXMLfiletoimportprojectsettingstoLabVIEWSignalExpress.

NoteTheXMLfiledisplaysvaluesforeveryparameterofeverystepintheproject,includingparametersthatyouarenotusingorthatarenotcurrentlyvisible.Forexample,someparametersappearontheStepSetuptabonlywhenyouconfigureastepinaparticularway.However,theXMLfilestillrecordsvaluesfortheseparameters.Ifyouhavenotspecifiedavalueforaparameter,theXMLfiledisplaysthedefaultvalue.

WhenyouexportprojectsettingstoXML,theXMLfiledoesnotincludesignaldatasuchasstepoutputvalues.YoucanuseshortcutmenuoptionsortheSavetoASCII/LVMsteptosaveoutputorloggeddatatoafile.

UsingNationalInstrumentsHardwarewithLabVIEWSignalExpressWithLabVIEWSignalExpress,youcancontrolNIdataacquisitionboardsandmodularinstrumentsusingthestepsintheAcquireSignalsstepmenu.YoucanperformthefollowinghardwareoperationsusingLabVIEWSignalExpresssteps:

Configurethebasicacquisitionorgenerationoptions,suchaschannelselection,acquisitionrate,numberofpoints,inputrange,andsoon.Usetriggeringcapabilitiesofthedevice.Synchronizemultipleboardsbysharingclockand/ortriggersignalsbetweenboards.

CommunicatingwithInstrumentsUsingIVILabVIEWSignalExpressprovidesasetofIVIstepsthatcommunicatewithinstrumentsinthefollowingIVIClasses:

DigitalMultimeterOscilloscopeDCPowerSupplyArbitraryWaveform/FunctionGenerator

Tocommunicatewithaninstrument,youneedtoinstalltheinstrument-specificIVIdriverandcreateasessionnamefortheinstrument.

DownloadingandInstallingtheInstrument-SpecificIVIDriverCompletethefollowingstepstodownloadanIVI-specificdriverforaninstrument.

1. LaunchtheInstrumentDriverNetwork.2. UsetheInstrumentTypelistontheleftsideofthepagetofinda

driverfortheinstrument,orclicktheBrowseDriverslinkandusetheSearchwithinresultsfieldtosearchfortheinstrumentyouareusing.

3. Whenyoufindadriveryouwanttodownload,clicktheModelnametoopenthedescriptionofthedriver.

4. ConfirmthatIVIappearsintheDriverTypedescription.5. Downloadandinstallthedriver.

CreatinganIVISessionNameEachLabVIEWSignalExpressIVIstepcontainsanIVIsessionnamecontrolthatallowsyoutoselectthesessionnamethatyouwanttoassociatewiththestep.Thesessionnameidentifiesthedriverandtheinstrumentthatyouwanttousewiththestep.FromtheIVIsessionnamecontrol,youcanselectapreviouslycreatedsessionnameorcreateanewlocalsessionnamefromthestep.CompletethefollowingstepstocreateanIVIlogicalnamefromthestep.

1. SelectCreateNewfromtheIVIsessionname.2. EnteranameandselecttheResourcedescriptorassociatedwith

theinstrumentthatyouwanttocontrol,orenterthedescriptorifitdoesnotappearintheResourcedescriptorcontrol.

3. SelecttheappropriateInstrumentDriverandclicktheOKbutton.NoteYoucansimulateyourhardwarebyplacingacheckmarkintheEnablesimulationdatacheckbox.

DeploymentTheIVIstepsinLabVIEWSignalExpresscommunicatetoaninstrumentthroughanIVISession.TheIVISessionisstoredintheIVIConfigurationStore,notinyourLabVIEWSignalExpressproject.Therefore,theIVISessionisnottransferablebetweencomputers.DeployingaLabVIEWSignalExpressProjectTobringyourLabVIEWSignalExpressprojecttoacomputerthathasLabVIEWSignalExpressinstalled,youcaneitherreconfiguretheIVIstepstouseexistingIVISessions,orifnoappropriateIVISessionsexist,createnewIVISessionsfromwithinLabVIEWSignalExpress.

1. SelectCreateNewfromtheIVIsessionname.2. EnteranameandselecttheResourcedescriptorassociatedwith

theinstrumentthatyouwanttocontrol,orenterthedescriptorifitdoesnotappearintheResourcedescriptorcontrol.

3. SelecttheappropriateInstrumentDriverandclicktheOKbutton.NoteYoucansimulateyourhardwarebyplacingacheckmarkintheEnablesimulationdatacheckbox.

DeployingLabVIEWCodeConvertedfromaLabVIEWSignalExpressProjectConvertedcodefromaLabVIEWSignalExpressprojectusesthesameIVISessionthatwasconfiguredinLabVIEWSignalExpress.Ifyoudeployyourgeneratedcodetoanewmachine,youmustrecreatetheIVISessiononthatmachine.IfLabVIEWSignalExpressisinstalledonthemachine,refertoDistributingLabVIEWBlockDiagramsforExecution.IfLabVIEWSignalExpressisnotinstalled,youcancreatetheIVISessionusingNationalInstrumentsMeasurement&AutomationExplorer(MAX).

1. LaunchMAX.2. ExpandtheIVIDrivers.3. FollowtheinstructionsintheMAXcategoryhelp.

YoualsocanrefertotheNIDeveloperZoneformoreinformationaboutusingMAXtoconfigureanIVIsystem.

ResourceDescriptorAresourcedescriptorisastring,suchasaVISAresourcedescriptor,thatspecifiestheinterfaceandtheaddressofthehardwaretoassociatewiththestep.Thefollowinglistsexamplesofvalidresourcedescriptors.

GPIB::22::INSTRGPIB1::22::5::INSTRVXI::64::INSTRASRL2::INSTRGPIB::22::INSTRDAQ::1::INSTRPXI1Slot2

NoteTheresourcedescriptorisnotnecessaryifyouplaceacheckmarkintheEnablesimulationdatacheckbox.

InstrumentDriverThedriverlistcontainsthelistofalldriversessionstowhichthestepcanrefer.Byselectingadriverfromthelist,youareassociatingthesessionnamewithaparticularsetofpropertiesthedrivercanuse.

EnablesimulationdataIfyouplaceacheckmarkintheEnablesimulationdatacheckbox,thespecificdriverfunctionssimulateinstrumentI/O.Ifyouremovethecheckmark,thespecificdriverfunctionsdonotreturnrandomsimulatedvaluesforoutputparametersthatrepresentinstrumentdata.

HardwareTimingandSoftwareTimingYoucanusehardwaretimingorsoftwaretimingtocontrolwhencertainactions,suchasadeviceacquiringorgeneratingasignal,occurinLabVIEWSignalExpress.Withhardwaretiming,adigitalsignal,suchasaclockonadevice,controlstherateoftimedactions.Withsoftwaretiming,LabVIEWSignalExpressdeterminestherateoftimedactionsusingtheoperatingsystemtimer.Hardwaretimingusuallyismoreaccuratethansoftwaretiming.

NoteSomedevicesdonotsupporthardwaretiming.Refertothedevicedocumentationtodetermineifadevicesupportshardwaretiming.

LabVIEWSignalExpressalsosupportshardwaretimingoptions,suchassampleclocksharing,thatyoucanusetosynchronizedevices.TimingconfigurationoptionsappearontheStepSetuptabofmostAcquireSignalsandGenerateSignalssteps.

SynchronizingDevicesInadditiontotheautomaticsynchronizationofdevicesofferedbyNI-DAQmxfordevicessuchasDSAorSMIO,youcansynchronizedevicesbysharingtriggerandsampleclocksignalsandbysharingamastertimebaseorareferenceclock.RefertotheSynchronizedAnalogInput(ShareTriggerandTimebase)examplelocatedintheSignalExpress\Examples\DAQmxdirectoryforanexampleofsynchronizingtwodevices.

NoteLabVIEWSignalExpressdoesnotsupporttrigger,clock,timebase,orreferenceclocksharingacrossPXITriggerbusesontheNIPXI-1006andNIPXI-1045chassis.

TriggerSharingYoucansynchronizedevicesbysharingtriggersignals.Forexample,ifyouconfigurethestarttriggerofaDAQmxAcquirestepwiththeTriggertypesettoDigital,youcanselectanyavailabletriggersignalprovidedbytheotherdevicescurrentlyintheprojectintheTriggersourcepull-downmenu.Whenyouselectoneofthesetriggersignals,LabVIEWSignalExpressroutesthetriggersignalbetweenthemasterandtheslaveandcontrolsthemasterandslaveexecution.LabVIEWSignalExpressinitializestheslavedevicebeforethemasterdevicesotheslavedevicecanreceivethetriggersignal.

SampleClockSharingYoucansynchronizedevicesbysharingsampleclocksignals.YoucanconfigureaDAQmxAcquirestepbyclickingtheSampleclocktypepull-downmenuandselectingExternalontheAdvancedtimingtab.Theclocksourcepull-downmenuletsyouselectanysampleclocksignalprovidedbytheotherdevicescurrentlyintheproject.Asfortriggers,LabVIEWSignalExpresshandlesthesampleclockroutingandtheexecutioncontrol.

AcquiringandGeneratingAnalogSignalsSimultaneouslyLabVIEWSignalExpresscanexecutestepsinprojectssimultaneously.Forexample,ifyouhavetwoDAQmxAcquirestepsinaproject,eachsteprunsatitsownrateandindependentlyoftheotherwhenyouruntheproject.Youcanusetriggersoryoucansharedatabetweenstepstocontroltheorderinwhichstepsexecuteinaproject.Forexample,whenyouuseLabVIEWSignalExpresstogenerateastimulussignalandthenmeasuretheresponsefromaunitundertest,youmustmakesurethattheacquisitiondoesnotoccuruntilaftertheDAQmxGeneratestepgeneratesthestimulussignal.Thefollowingsectiondescribesdifferentoptionsforcontrollingtheexecutionrelationshipbetweenhardwarestepstoensuremeasurementsoperateappropriately.

ExecutionDependenciesinHardwareStepsIfaprojectcontainstwoDAQmxAcquirestepsandyouconfigurethestepstosharethesamestarttrigger,LabVIEWSignalExpressexecutesbothstepssimultaneouslywhenyouruntheproject.Thestepshaveatriggerdependency.IfaprojectcontainsaDAQmxGeneratestepandaCreateAnalogSignalstep,andtheDAQmxGeneratestepisgeneratingthesignaltheCreateAnalogsignalstepcreates,LabVIEWSignalExpressexecutestheCreateAnalogSignalstepbeforetheDAQmxGeneratestepbecausethestepshaveadatadependency.ThegeneratestepcannotexecuteuntiltheCreateAnalogSignalstepspassesitanoutputsignal.YoucanusetriggersharingortheconfigurationoptionsontheStepSetuptabofasteptoconfigureexecutiondependenciesforcommonhardwaresystems,suchasastimulus/responsesystem.

AcquiringandGeneratingSignalswithInstrumentsYoucanacquireandgeneratesignalsusingstand-aloneinstrumentsorNationalInstrumentsmodularinstruments.Refertothedocumentationforthesestepsformoreinformationaboutacquiringandgeneratingsignalswithinstruments.

UsingStepExecutionDependenciesinaStimulus/ResponseSystemIfyouwanttocreateaprojectthatmeasurestheresponseofasystemtoastimulus,useaDAQmxGeneratesteptostimulatethesystemandaDAQmxAcquiresteptoacquiretheresponseofthesystemtothestimulus.Togetavalidmeasurement,executetheDAQmxAcquirestepatthesametimeoraftertheDAQmxGeneratestepstartsthegeneration.Ifyouwanttostartthegenerationandtheacquisitionatthesametime,youcanestablishatriggerdependencybetweentheDAQmxGenerateandtheDAQmxAcquirestepsbysharingatriggerbetweenthesteps.Ifyouwanttostartthegenerationbeforetheacquisition,placeacheckmarkintheStartthisstepaftercheckboxontheExecutioncontrolpageoftheStepSetuptaboftheacquisitionstep.Whenyouruntheproject,theacquisitionstepdoesnotexecuteuntilafterthegenerationstepbeginsexecuting.Ifyouwanttheacquisitionsteptowaitonastepotherthanthepreviousgenerationstep,selectthestepyouwanttowaitforintheSteptowaitforpull-downmenu.Ifyouwanttoaccountforsettlingtimesbetweentheexecutionofdependentsteps,youcanusethepre-executiondelayfieldontheExecutioncontrolpageoftheStepSetuptabtospecifyaminimumamountoftimetowaitbetweentheexecutionofthesteps.

CircularExecutionDependencyErrorsWhenyousynchronizemultipledevicestogether,LabVIEWSignalExpressstartsthedevicesinaspecificordertoensurecorrectsynchronization.Forexample,ifyouconfigureadevicetostartonadigitalstarttriggerandselectthestarttriggersignalofanotherdeviceasthetriggersource,LabVIEWSignalExpressstartsthedevicereceivingthetriggerbeforestartingthedevicesendingthetriggertoensurethatthereceiverisreadyforthetriggerbeforeitissent.Similarly,ifyouconfigureasteptostartafteranotherstepbyplacingacheckmarkintheStartthisstepaftercheckboxandspecifyingastepintheSteptowaitforoptionlocatedontheExecutionControltaboftheDAQmxAcquireandDAQmxGeneratesteps,LabVIEWSignalExpressstartsthestepsbasedontheorderyouspecifyintheSteptowaitforoption.Ifyouconfigureyourstepstostartinthewrongorder,youcancauseacirculardependencyerror.Thefollowingexamplesillustratehowyoucancauseacirculardependencyerror:

Youconfiguretwostepstostartafteroneanother,oryouconfiguretwostepstosharetriggerswitheachother.Youconfigureasteptostartonadigitalstarttriggerwiththestarttriggersignalofanotherstepasthetriggersource,andyouconfigurethesteptostartafterthestepthatproducesthetrigger.

Toresolvethecircularexecutiondependencyerror,modifytheorderofoneormoresteps.LabVIEWSignalExpressliststhestepsresponsiblefortheerrorandliststheoptionsyoucanchangetoresolvetheerror.

NoteSomestepscontainaSampleclocksourceoptionusedwhenyouconfigurethedevicetouseanexternalclock.LabVIEWSignalExpressusesthevalueinthisoptiontoensurethedevicegeneratingtheclocksignalgeneratesthesignalbeforeLabVIEWSignalExpressprogramsthedevicetoreceivethesignal.TheSampleclocksourceoptionalsocanberesponsibleforcircularexecutiondependencyerrors.

AcquiringDatawiththeDAQmxAcquireStepWiththeDAQmxAcquirestep,youcanacquireanalogsignalsusinganyNI-DAQmxcompatibledeviceinyoursystem.

ConfiguringtheDAQmxAcquireStepFromthestepconfiguration,youcanaccessthedeviceconfigurationparameters,suchastheinputchannels,thesamplerateatwhichtoacquiredata,andthenumberofsamplestoacquireateachiteration.Youalsocanconfiguremoreadvancedparameters,suchasthestarttrigger,thereferencetrigger,andclock.Finally,youcansynchronizetheDAQmxAcquirestepwithotherhardwarestepsbyconfiguringadigitaltriggerandusingatriggersignalfromanotherdeviceasthetriggersource.Youalsocansynchronizemultipledevicesbysharingclockandmastertimebasesignals.

AcquisitionTimingToacquiresignalswiththeDAQmxAcquirestep,youmustunderstandtherelationshipbetweentheacquisitiontimingmodesandtheLabVIEWSignalExpressrunmodes.ThefollowingtableshowshowtheNSamples,1Sample(OnDemand),andContinuousSamplesacquisitionmodesworkinrelationtotheRunOnceandRunContinuouslymodes.

1Sample(On

Demand)NSamples ContinuousSamples

RunOnce Thedeviceacquiresonesampleandstops.

ThedeviceacquiresNsamplesandstops.Thedevicegeneratesastarttriggeratthebeginningoftheacquisition.

ThedeviceacquiresNsamplesandstops.Thedevicegeneratesastarttriggeratthebeginningoftheacquisition.

RunContinuously

Thedeviceacquiresonesamplerepeatedlyuntilyoustoptheexecution.

ThedeviceacquiresNsamplesrepeatedlyuntilyoustoptheexecution.Thedevicegeneratesastarttriggerateachiteration.

ThedeviceacquirestimecontiguousblocksofNsamplesuntilyoustoptheexecution.Thedevicegeneratesastarttriggeratthebeginningofthefirstiteration.

PerformanceConsiderationsWhenyouconfiguretheDAQmxAcquirestepincontinuousmode,LabVIEWSignalExpressmustsustainaminimumloopratetoensurethecontinuityoftheacquireddata.Thelooprateisequaltothenumberofsamplestoacquiredividedbythesamplerate.Thatis,thesoftwaremustexecutefastenoughtoacquirethesignalcontinuouslywithoutlosinganydatabetweeneachbuffertransfer.Ifyoudisplaytheacquireddataonthedataviewerorleaveanyconfigurationviewsopen,youcanreducetheexecutionspeedofLabVIEWSignalExpressandpossiblylosedata.Ifyoulosedatabetweenbuffertransfers,thedevicereturnsanoverwriteerrorandbreaksthecontinuityoftheacquireddata.Ifthedevicereturnsoverwriteerrors,youcanreducethesamplerateorincreasethenumberofpointsinthebuffer,closeanyconfigurationviews,removetheacquiredsignalfromtheDataView,orde-selecttheUpdateSignalViewswhileRunningoptionintheViewmenu.

NoteRefertotheNI-DAQmxHelpformoreinformationaboutdataacquisition.

GeneratingDatawithanNI-DAQmxDeviceYoucangenerateanytimedomainsignalintheLabVIEWSignalExpressprojectwithanyNI-DAQmx-supportedanalogoutputdeviceinstalledonyoursystemusingtheDAQmxGeneratestep.BeforeyoucangenerateasignalusingaDAQmxdevice,youmustfirstcreateorimportthesignalintoLabVIEWSignalExpressandthenpassthesignaltotheDAQmxGeneratestep.YoucancreatethetimedomainsignalusingtheCreateAnalogSignalsteporyoucanimportitintoyourprojectusingasnapshot,datalog,ortheLoadfromASCII,LoadfromLVM,orLoadfromSPICEsteps.

ConfiguringtheDAQmxGenerateStepFromtheDAQmxGenerateconfigurationview,youcanaccessmostofthedeviceconfigurationparameters,suchastheoutputchannel,theoutputrange,andtheupdaterate.Bydefault,theupdaterateatwhichthedeviceisconfiguredmatchesthesamplerateoftheinputsignaldefinedintheCreateAnalogSignal,LoadfromASCII,LoadfromLVM,orLoadfromSPICEsteps.YoucanoverwritetheupdateratewithanyvaluebyremovingthecheckmarkfromtheWTcheckboxandenteringavalueforRate(Hz).Youcansynchronizemultipleboardstousethesametriggersignalbysettingupadigitalstarttriggerandspecifyingthetriggersignalofanotherdeviceasthetriggersource.Youalsocanshareclockandmastertimebasesignalstosynchronizemultipledevices.

GenerateContinuouslyVersusGenerateNSamplesTosuccessfullygeneratesignalswiththeDAQmxGeneratestep,youmustunderstandtherelationshipbetweenthegenerationtimingmodesandtheLabVIEWSignalExpressrunmodes.ThefollowingtabledescribeshowtheGenerateContinuouslyandGenerateNsamplestimingmodesworkinrelationtotheRunOnceandRunContinuouslymodes.

ContinuousSamples NSamples 1Sample(onDemand)

RunOnce Thedevicestartsgeneratingthesignalcontinuouslyandstops.Thereisnoguaranteethattheentiresignalisgenerated.NationalInstrumentsdoesnotrecommendyouusetheGeneratecontinuouslytimingmodewiththeRunOncerunmode.Thedevicegeneratesastarttriggeratthebeginningofthegeneration.

Thedevicegeneratesthesignalonceandstops.Thedevicegeneratesastarttriggeratthebeginningofthegeneration.

Thedevicegeneratesthesignalonceandstops.

RunContinuously

Thedevicegeneratesthesignalcontinuouslyuntiltheuserstopstheexecution.Iftheinputsignalchangeswhiletheprojectisrunning,thisstepreloadstheinputsignalintotheoutputbufferofthedevicewithout

Thedevicegeneratestheinputsignaldiscontinuouslyuntilyoustoptheexecution.Iftheinputsignalchangeswhiletheprojectisrunning,thisstepreloads

Thedevicegeneratestheinputsignalcontinuouslyuntilyoustoptheexecution.Iftheinputsignalchangeswhiletheprojectis

stoppingthedevice.Thedeviceonlygeneratesonestarttriggeratthebeginningofthegeneration.

theinputsignalintotheoutputbufferofthedevice.Thedevicegeneratesastarttriggerateachiteration.

running,thisstepreloadstheinputsignalintotheoutputbufferofthedevice.

GeneratingaNon-repetitiveNoiseSignalorPhaseContinuousSignalNI-DAQmx-supporteddevicescanupdatetheiroutputbufferwhilerunningandgeneratephasecontinuousornon-repetitivenoisesignals.Completethefollowingstepstogenerateanon-repetitivenoisesignal.

1. PlacetheCreateAnalogSignalstepintheProjectView.2. IntheSignaltypepull-downmenu,selectNoiseSignal.3. Enter10kintheSampleratefield.4. MakesurethereisnocheckmarkintheRepeatedsignal

checkbox.5. ClicktheAddStepbuttonandselectGenerate

Signals»DAQmxGenerate»AnalogOutputandselectVoltageorCurrent.

6. OntheConfigurationpageoftheStepSetuptabfortheDAQmxGeneratestep,selectContinuousSamplesfromtheGenerationModepull-downmenu.

7. RunLabVIEWSignalExpresscontinuously.TheCreateAnalogSignalstepproducesanewnoisepatternateachiterationandpassesthepatterntotheDAQmxGeneratestepthatloadsitintotheanalogoutputdevice,resultinginanon-repetitivenoisegeneration.

YoucanusetheCreateAnalogSignalandtheDAQmxGeneratestepstogenerateaphasecontinuoussignalofanyarbitraryfrequency.Completethefollowingstepstogenerateaphasecontinuousnoisesignal.

1. PlacetheCreateAnalogSignalstepintheProjectView.2. IntheSignaltypepull-downmenu,selectaSineWaveand

specifyanarbitraryFrequency.3. RemovethecheckmarkfromtheRepeatedsignalcheckboxso

thateachiterationofthesignaliscontiguoustothepreviousiteration.

4. RunLabVIEWSignalExpresscontinuously.TheCreateAnalogSignalstepproducesacontinuoussignalwithincreasingtimestampandphasecontinuity.

Tomaintainphasecontinuityofageneratedsignal,LabVIEW

SignalExpressmustsustainaminimumlooprate.Theminimumlooprateisequaltothesampleratedividedbythenumberofsamplesinthesignal.IfLabVIEWSignalExpresscannotsustaintheminimumlooprate,removeanyunnecessarygraphdisplayplotsintheDataViewandcloseanyconfigurationviews.Ifthesoftwarestillcannotsustaintheminimumlooprate,decreasethesamplerateorincreasethebuffersizetodecreasethelooprate.RefertotheContinuousNoiseGenerationandFiniteAcquisition(NonRegeneration)examplelocatedintheSignalExpress\examples\DAQmxdirectoryforanexampleofgeneratingatruenoisesignal.

GeneratingaRepetitiveSignalwithanNI-DAQmxDeviceYoucanuseLabVIEWSignalExpresstogeneratearepetitivesignalcontinuously.Witharepetitivesignal,thesignaliscreatedandloadedintothedeviceonlyonce,whichmeansthattherearenominimumloopratesrequired.Youcanperformthistypeofrepetitivesignalgenerationwithamuchhighersampleratethananon-repetitivenoiseorphasecontinuoussignalgeneration.Whengeneratingarepetitivesignal,youcangenerateusingthemaximumsampleratethedeviceallows.Completethefollowingstepstoperformarepetitivesignalgeneration.

1. CreatetherepetitivesignalbyimportingthesignalfromafileusingtheLoadfromASCII,LoadfromLVM,orLoadfromSPICEsteps.YoualsocanusetheCreateAnalogSignalstep.IfyouusetheCreateAnalogSignalstep,placeacheckmarkintheRepeatedsignalcheckbox.

2. PassthesignaltotheDAQmxGeneratestep,whichloadsdatatotheoutputbufferofthedeviceonlywhenthedatachanges.BecausethefileimportstepsandtheCreateAnalogSignalstepproducetheiroutputsignalonlyatthefirstiteration,theDAQmxGeneratesteploadsthesignalintothedeviceatthefirstiterationandrepetitivelygeneratesthesignaluntilyoupresstheStopbutton.

RefertotheContinuousToneGenerationandFiniteAcquisition(Regeneration)examplelocatedintheSignalExpress\Examples\DAQmxdirectoryforanexampleofgeneratingarepetitivesignal.

GeneratingaDCSignalwithNI-DAQmxDevicesIntheDAQmxGeneratestep,select1Sample(OnDemand)intheGenerationModepull-downmenu.Youcanselectaprogrammaticinputtogenerate,oryoucanremovethecheckmarkfromtheUseProgrammaticInputcheckboxandspecifyavaluetogenerateintheValuetoWritefield.

NoteRefertotheNI-DAQmxHelpformoreinformationaboutgeneratingdata.

MasterTimebaseandReferenceClockSharingCertaintypesofNI-DAQmx-supporteddevicessupportmastertimebaseorreferenceclocksharingbetweenmultipledevices,whichissimilartotriggerandsampleclocksharing.Forexample,Eseriesdevicescansharemastertimebases,andMseriesdevicescansharereferenceclocksignals.TimebasesettingsappearontheAdvancedTimingpageoftheStepSetuptabforDAQmxAcquireandDAQmxGeneratesteps.Toshareamastertimebaseorreferenceclockbetweentwodevices,navigatetotheStepSetuptabfortheDAQmxAcquireorDAQmxGeneratestepforoneofthedevicesandselectExternalfromtheMasterTimebaseorReferenceClockpull-downmenu.SelectthedeviceyouwanttouseasthesourcefromtheMasterTimebaseSourceorReferenceClockSourcepull-downmenu.Ifyouaresharingatimebaseorreferenceclockamongmorethantwodevices,besuretoalwayspickthesamedeviceasthetimebaseorclocksource.

DisplaysAprojectcancontainmultipleDataViewtabs,andoneDataViewtabcancontainmultipledisplays.AdisplayisasectionofaDataViewtabonwhichyoucanviewsignalsintheproject.Dependingonthedatatypeofthesignalyouaddtoadisplay,youcanselectfrommultipledisplayformats,suchasgraphs,charts,andvariousnumericrepresentations.LabVIEWSignalExpressdisplayssignalsofthesametypeinthesamedisplaybydefault,butyoucanaddadditionaldisplaysbyclickingtheAddDisplaybuttonorbyright-clickinganexistingdisplayandselectingoneoftheDataView»AddDisplayoptionsfromtheshortcutmenu.Toremoveadisplay,right-clickthedisplayandselectDataView»RemoveDisplayfromtheshortcutmenu.

AddingandRemovingSignalsToaddsignalstoadisplay,dragasignalfromtheProjectViewtothedisplayorright-clickthedisplay,selectSignals»AddSignalfromtheshortcutmenu,andselectthesignalyouwanttoadd.Toremovesignalsfromadisplay,right-clickthedisplay,selectSignals»RemoveSignalfromtheshortcutmenu,andselectthesignalyouwanttoremove.Youalsocanright-clickasignalintheProjectViewandselectDisplay»ExistingDataVieworDisplay»NewDataViewtoaddthesignaltoanewdisplayontheactiveDataViewtabortoanewdisplayonanewDataViewtab.

ConfiguringDisplayPropertiesYoucanusetheDisplayPropertiesdialogboxtoconfigurepropertiesforalltypesofdisplays.Thedisplaypropertiesyoucanconfiguredependontheformatofthedisplayandcanincludetitles,formatandprecision,plots,scales,cursors,andsignalorder.ClickthePropertiesbuttonorright-clickadisplayontheDataViewtabandselectPropertiesfromtheshortcutmenutodisplaytheDisplayPropertiesdialogbox.

AdditionalDisplayOptionsYoucanusetheshortcutmenuforagraphdisplaytodisplayapreviewgraph,agraphlegend,cursors,aneventviewer,oralarms.Right-clickagraphandselectVisibleItemsfromtheshortcutmenutoselecttheseoptions.

DisplayFormatsYoucanselectfrommultipleformatoptionsfordisplayingdataontheDataViewtab.Tochangetheformatofadisplay,right-clickthedisplayandselectoneoftheViewAsoptionsfromtheshortcutmenu.Thenumberofoptionsavailabledependsonthedatatypeofthesignal.

NoteTheViewAsoptiononlyappearsintheshortcutmenuofadisplayifthedisplaycontainsdatathatyoucanviewinadifferentdisplayformat.

GraphsGraphsarethemostcommontypeofdisplayinLabVIEWSignalExpress.Time-domain,frequency-domain,andxysignalsalwaysappearongraphsontheDataViewtab.Onegraphcandisplaymultiplesignalsonlyifthesignalsareofthesametype.Forexample,ifyoutrytoaddafrequency-domainsignaltoagraphthatdisplaysatime-domainsignal,anewgraphappearstoplotthefrequency-domainsignalbecausethesignalsaredifferentsignaltypes.AdditionalDisplayFormatOptionsInadditiontographs,youcanchoosefromthefollowingformatstodisplaydataontheDataViewtab:

DisplayFormat

SupportedDataTypes

Description

NumericDisplay

Scalar(integersonly)

Displaysthenumericvalueofanintegerscalar.

VerticalLED Boolean DisplaysanLEDthatindicatesthevalueofaBooleansignal.

ChartDisplay Boolean,Scalar

DisplaysaplotofaBooleanorscalarsignalandalegendthatincludesthenameandcurrentvalueofthesignal.Thechartdisplayupdatesperiodicallyandmaintainsahistoryofthesignaldatapreviouslystored.Right-clicktheplotandselectHistoryLengthfromtheshortcutmenutospecifythenumberof

samplestostoreinacharthistory.ThenumberofsamplesisthenumberofdatapointsLabVIEWSignalExpressusestoplotthesignal.Youalsocanspecifyhowachartdisplayupdatestheplotteddatabyright-clickingtheplotandselectingoneofthefollowingUpdateModeoptionsfromtheshortcutmenu:

StripChart—Showsdatacontinuouslyscrollingfromlefttoright.ScopeChart—Showsoneitemofdatascrollingpartwayacrosstheplotfromlefttoright.Whenthedatareachestherightborder,LabVIEWSignalExpresserasestheplotandbeginsplottingagainfromtheleftborder.SweepChart—SimilartoascopechartexceptthatwhenLabVIEWSignalExpressbeginsplottingagainfromtheleftbordertheplotshowsboththeolddataandthenewdataseparatedbyaverticalline.

Slider Scalar Displaysaverticalslidefilledtothevalueofthesignal.

TableDisplay Boolean,Scalar

Displaysatablethatincludesthenameandcurrentvalueofthesignal.

Tank Scalar Displaysatankfilledtothevalueofthesignal.

Thermometer Scalar Displaysathermometerfilledtothevalueofthesignal.

Gauge Scalar Displaysagaugewithaneedlethatindicatesthevalueofthesignal.

LargeDisplay

Boolean,Scalar

Displaysthevalueandunitsofthesignalinlargetext.

(double-precisiononly),String

Meter Scalar Displaysameterwithaneedlethatindicatesthevalueofthesignal.

ViewingandAnalyzingaLoggedSignalAfteryoulogasignal,youcanswitchtothePlaybackworkareatoplaybackandanalyzetheloggedsignal.ThePlaybackworkareaissimilartotheMonitor/RecordworkareaexceptthattheDataViewtabappearswithatimebarandvariousbuttonsyoucanusetonavigatealoggedsignal,andyoucanuseloggedsignalsasstepinputs.CompletethefollowingstepstoviewaloggedsignalinthePlaybackworkareaandruntheloggedsignalthroughaProcessingorAnalysisstep.

1. IntheMonitor/Recordworkarea,logasignal.2. SelectPlaybackorthenameofthelogyouwanttoplayback

fromthepull-downmenuthatappearsabovetheProjectViewtoswitchtothePlaybackworkarea.YoualsocanselectView»WorkAreas»PlaybacktoswitchtothePlaybackworkarea.

NoteIfyouselectaspecificlogfromthepull-downmenuabovetheProjectView,LabVIEWSignalExpressmakesthatlogtheactivelogwhenyouswitchtothePlaybackworkarea.

2. DragaloggedsignalfromtheLoggedDatawindowtotheDataViewtab.

3. ClicktheRunbutton.LabVIEWSignalExpressplaysbacktheloggedsignalatthespeedatwhichyourecordedthesignal.

4. (Optional)Usethebuttonsandthepull-downmenuonthetimebartoadjusthowLabVIEWSignalExpressplaysbacktheloggedsignal.Youcanchangetheplaybackspeed,playbackthesignalrepeatedly,playbackthesignalfromaspecificpointintime,orrunoneiteration(block)oftheloggedsignalatatime.Youalsocanmovethepointeronthetimebartonavigatethroughtheloggedsignalmanually.

5. Addastepthatrequiresaninputsignal,suchastheFilterstep,totheProjectView.LabVIEWSignalExpressautomaticallyselectstheactivelogasthestepinput.

6. DragtheoutputofthesteptotheDataViewtabandclicktheRunbutton.LabVIEWSignalExpressrunstheloggedsignalthroughthestepblockbyblockanddisplaystheresultsontheDataViewtab.

YoucanusethePlaybackOptionstabtoconfigureadvancedplaybackoptions.Forexample,youcanusethePlaybackOptionstabtoselectsubsetsofloggedsignalstoplaybackandanalyze,changetheblocksizeofloggedsignals,andtoconfigureoverlapofblocksofsignaldata.

ChangingPlotOrderonGraphsWhenyouaddasignaltoagraph,LabVIEWSignalExpressassignsthesignalacolorandapositionintheplotorder.SelectVisibleItems»Legendtodisplaythegraphlegendandseetheplotorderofthesignals.Bydefault,thelastsignalyouaddtothegraphisthelastsignalintheplotorderinthelegend.TheorderinwhichyouaddthesignaldictatesthecolorLabVIEWSignalExpressassignstotheplot.Completethefollowingstepstochangetheplotorderonagraph.

1. Right-clickagraphdisplayandselectPropertiesfromtheshortcutmenutodisplaytheDisplayPropertiesdialogbox.

2. OntheSignalOrderpage,clicktheMoveForwardbuttontomovethesignaluponespotintheplotorder.ClicktheMoveBackwardbuttontomovethesignaldownonespotintheplotorder.ClicktheMoveToFrontbuttontomovethesignaltothetopoftheplotorder.ClicktheMoveToBackbuttontomovethesignaltotheendoftheplotorder.

3. ClicktheOKbuttontoclosethedialogboxandapplythechanges.

Whenyoumovesignalsintheplotorder,thesignalschangecolorsothatthefirstsignalisalwayswhite,thesecondsignalisalwaysred,etc.Youcanchangethecolorofasignalbyclickingthecolornexttothesignalinthegraphlegendandselectingacolorfromthepalettethatappears.

AligningSignalsSignalsfromdifferentsources,suchasdifferenthardwaredevicesorfiles,varyinamplitudeandtimingandmightnotalignonagraphinausefulwayforcomparingthesignals.Youcanalignsignalsbyconfiguringtimestampsonagraph,oryoucanusetheInteractiveAlignmentstep.

AligningSignalsUsingtheInteractiveAlignmentStepCompletethefollowingstepstoaligntwotime-domainsignalsonagraphusingtheInteractiveAlignmentstep.

1. AddtheInteractiveAlignmentsteptotheProjectView.Thestepselectsthetwomostrecentsignalsintheprojectasinputs,anddisplaysthemontheInputSignalsgraphintheConfigurationView.

NoteTheInteractiveAlignmentstepcanoperateonlyontime-domainwaveformsignals.

2. IntheConfigurationView,configurethecomparisonusingoneofthefollowingmethods:

Configurethecomparisonmanually.IntheInputSignalsgraph,selectthetestsignal,plottedinred,anddragittothepositionyouwantinthegraphforthecomparison.Youcanexpandthetestplotmanuallyinbothdirectionsbyholdingthe<Alt>keywhileyoudragtheplot.Thestepcomputesthex-offset,y-offset,x-gain,andy-gainasyoumovetheplot.Configurethecomparisonbasedonabuilt-inalgorithm.SelectoneoftheautomodesfromtheModepull-downmenu.

3. SwitchtotheDataViewanddragthecomparisonsignaloutputtoaviewtoseetheresultsofthecomparison.

CursorsWhenyoudisplaysignalsingraphorchartdisplaysontheDataViewtab,youcanusecursorstodeterminespecificvalueswithinthesignals.Right-clickagraphandselectVisibleItems»Cursorsfromtheshortcutmenutoaddcursorstothegraphanddisplayacursorlegendbelowthegraph.Thecursorlegenddisplaysthex-andy-valuesofthesignalatthepointwhereeachcursorintersectsthesignal,theslopebetweenthex-andy-values,andtheinverseandderivativevaluesoftheslope.Cursorsappearasperpendicularlinesthatintersectatapointontheplotofasignal.Whenyouaddcursorstoagraph,LabVIEWSignalExpressalwaysdisplaystwocursors,andthecursorsalwaysarelinkedtoaplotonthegraphsothatthecursorremainsalignedwiththesignalwhenyoumovethecursor.Ifthegraphcontainsmultiplesignals,LabVIEWSignalExpresslinksthecursorstotheplotofthefirstsignalinthesignalorderbydefault.

ChangingCursorPositionWhenyouaddcursorstoagraph,LabVIEWSignalExpressenablestheCursorMovementToolonthegraphpaletteautomatically.WiththeCursorMovementToolenabled,youcandragcursorstodifferentpositionsontheplotofasignal.Youalsocanright-clickthegraphandselectCursorName»SetPositiontomovetheverticalcrosshairofthecursortothelocationwhereyouright-clickthegraph.FindingPeakValuesYoucanusecursorstofindpeakvaluesofasignal.Right-clickthegraphandselectCursorName»NextPeakorCursorName»PreviousPeaktomovethecursortothecorrespondingpeakvalue.UsetheCursorspageoftheDisplayPropertiesdialogboxtodefinethepeakthresholdandpeakwidththatacursorusestorecognizepeakvalues.

ChangingLinkedPlotsIfagraphcontainsmultiplesignals,youcanchangethesignalplottowhichacursorislinked.Tochangethelinkedplotofacursor,clickthesignalnameinthecursorlegendandselectasignalfromtheshortcutmenu,right-clickacursorinthecursorlegendandselectLinkToPlot»Plotnamefromtheshortcutmenu,orright-clickthegraphandselectCursorName»LinkToPlot»Plotnamefromtheshortcutmenu.YoualsocanusetheLinkedtoplotpull-downmenuontheCursorspageoftheDisplayPropertiesdialogboxtochangethelinkedplotofacursor.

CustomizingCursorsAfteryouaddcursorstoagraph,youcanusetheCursorspageoftheDisplayPropertiesdialogboxtocustomizethestyle,appearance,orientation,andbehaviorofthecursors.YoualsocanusethispagetospecifyvaluesasignalmustcrossbeforeLabVIEWSignalExpressrecognizespeakvalues,exportmeasurementvaluesfromthecursorlegendtouseasstepinputs,andbindexportedcursormeasurementstostepparameterssotheparametertowhichyoubindacursormeasurementupdatestousethevalueofthemeasurement.TodisplaytheCursorspage,right-clickacursorinthecursorlegendandselectCursorPropertiesfromtheshortcutmenuorright-clickthegraphandselectCursorName»Propertiesfromtheshortcutmenu.

NoteYoualsocanclickthePropertiesbuttonontheDataViewtaborright-clickadisplayandselectPropertiesfromtheshortcutmenutodisplaytheDisplayPropertiesdialogbox,thennavigatetotheCursorspage.

BindingCursorMeasurementValuestoStepParametersWhenyoudisplaycursorsonagraphofasignal,youcanexportthemeasurementvaluesthatappearinthecursorlegendtouseasstepinputs,andyoucanbindthosevaluestostepparameters.Bindingcursormeasurementstostepparameterscanbeusefulwhenyouwanttouseaveryspecificvaluefortheparameter.Forexample,youmightwanttousetheSubsetandResamplesteptocreateasubsetofasignal.Ifyouwantthesubsettobeginataspecificpointintheinputsignal,youcanbindthex-valueofacursorontheinputsignaltotheStartpositionparameterofthestep.Completethefollowingstepstobindacursorlegendvaluetoastepparameter.

1. AddasignaltoagraphdisplayontheDataViewtab,right-clickthedisplay,andselectVisibleItems»Cursorsfromtheshortcutmenutodisplaycursorsandthecursorlegend.

2. Right-clickacursorinthecursorlegendandselectCursorPropertiesfromtheshortcutmenutodisplaytheCursorspageoftheDisplayOptionsdialogbox.

3. OntheCursorspage,selecttheMeasurementstab.4. IntheCursorMeasurementstable,findthemeasurementyou

wanttobindtothestepparameterandclickthebuttonthatappearsintheBindcolumntodisplaytheBindingSelectiondialogbox.Thisdialogboxdisplaysallthestepparameterstowhichyoucanbindcursormeasurements.

5. Placeacheckmarkinthecheckboxnexttotheparameter(s)towhichyouwanttobindthecursormeasurement.

6. ClicktheOKbuttontoclosetheBindingSelectiondialogboxandbindthecursormeasurementtotheparameter.LabVIEWSignalExpressplacesacheckmarkintheExportcheckboxforthemeasurementintheCursorMeasurementstable.

NoteWhenyoubindacursormeasurementtoastepparameter,LabVIEWSignalExpressexportsthecursormeasurementautomatically.

7. ClicktheOKbuttontoclosetheDisplayPropertiesdialogbox.

Toundobindingacursormeasurementtoastepparameter,followtheprecedingstepsuntilyoudisplaytheBindingSelectiondialogbox.RemovethecheckmarkfromthecheckboxnexttoaparameterandclicktheOKbuttontoundobindingthecursormeasurementtotheparameter.

DataGroupingYoucananalyzemultipledatachannelsatthesametime.DragagroupofchannelsfromtheProjectViewintotheDataViewtoviewallsignalsfromthegrouponthesamedisplay.Youalsocansendgroupsofdatathroughanalysissteps.Whenselectinganinputsignalforastep,selecttheAllElementsoption.Thestepoutputsresultsforeverychannelwithinthedatagroup.

CreatingSubgroupsYoucancreateauser-definedsubgroupofdata.Right-clickastepoutputandselectDefineSubgroupstodisplaytheDefineSubgroupsdialogbox.ClicktheCreateanewsubgroupbuttontocreateanewsubgroupandspecifyanameforthesubgroup.SelectasignalfromtheSignalscolumnandclicktheCopysignalsintotheselectedsubgroupbuttontoaddtheselectedsignalsintotheselectedsubgroup.

ManagingHardwarewiththeChannelViewTheChannelViewisacentrallocationforviewingandconfiguringhardwareandsharedvariables.YoucanusetheChannelViewtomanageandconfigurehardwaredevicesandchannelsandtoacquiresignalsinLabVIEWSignalExpress.InthePhysicalChannelcolumnoftheChannelView,clicktheplussignnexttoadevicenametoviewthephysicalchannelsofthedevice.EachchannelanddeviceappearwithacheckboxintheAcquirecolumn.UsetheAcquirecheckboxtospecifywhethertoacquiredatafromthechannelordevice.WhenyouplaceacheckmarkintheAcquirecheckbox,additionalcolumnsofmeasurementconfigurationoptionsappearintheChannelView,andLabVIEWSignalExpressautomaticallyplacesadataacquisitionstepintheProjectView.LabVIEWSignalExpressconfiguresthesteptomatchtheoptionsyouspecifyintheChannelView.

NoteYoualsocanusethePropertieswindowtoconfigurechannelsordevices.

ManagingSharedVariableswiththeChannelViewTheChannelViewisacentrallocationforviewingandconfiguringhardwareandsharedvariables.YoucanusetheChannelViewtoviewandreadthevaluesofsharedvariablesonthelocalmachineorlocalnetwork.TheChannelViewdisplayshardwaredevicesbydefault.SelectSharedVariablesfromtheViewpull-downmenuatthetopoftheChannelViewtodisplayallthesharedvariablesthatexistonthelocalmachineorlocalnetwork.IntheSharedVariableNamecolumn,expandLocalhosttodisplaysharedvariablesthatareavailableonthelocalmachine.ExpandNetworkNeighborhoodtodisplaymachinesonthelocalnetwork.YoualsocanclicktheAddMachinebuttonandenteramachinenameorIPaddresstoaddamachinetotheChannelView.Networks,machines,andsharedvariablesappearwithcheckboxesinanAcquirecolumn.UsetheAcquirecheckboxtospecifywhethertoreadthevaluesofsharedvariables.WhenyouplaceacheckmarkintheAcquirecheckbox,aSamplePeriod(s)columnappears,andLabVIEWSignalExpressautomaticallyplacesaReadSharedVariablesstepintheProjectView.LabVIEWSignalExpressconfiguresthesteptomatchtheoptionsyouspecifyintheChannelView.

NoteYoualsocanusethePropertieswindowtoquicklyconfiguremultiplesharedvariables.

PlaceacheckmarkintheAcquirecheckboxforamachinetoreadthevaluesofalltheavailablesharedvariablesonthatmachine.Ifyouselectmultiplesharedvariables,LabVIEWSignalExpressusesoneReadSharedVariablessteptoreadthevaluesofanysharedvariablesthathavethesamesampleperiod.

ImportingandExportingChannelViewDataYoucanexportdatafromtheChannelViewtoaMicrosoftExcelspreadsheetandimportthedatabackintothesameprojectorintoanewproject.YoucanusethisfeaturetoshareChannelViewconfigurationsamongmultipleprojectsortoeditconfigurationsettingsfromMicrosoftExcel,whichcanbeusefulwhentheChannelViewcontainsalargenumberofitems.SelectFile»Export»ChannelViewtoExcelorright-clickintheChannelViewandselectExportTo»MicrosoftExceltoexportdatafromtheChannelViewtoMicrosoftExcel.

NoteIfyouintendtoimportdatafromtheMicrosoftExcelspreadsheetbackintoLabVIEWSignalExpress,youmustnoteditthetop-levelheaderoranyofthecolumnheadersinthespreadsheet.LabVIEWSignalExpressusestheheaderstopopulatetheChannelViewcorrectly.Youcaneditanyothervaluesinthespreadsheet.

SelectFile»Import»ChannelViewfromExcelorright-clickintheChannelViewandselectImportFrom»MicrosoftExceltoimportChannelViewdatafromaMicrosoftExcelspreadsheet.WhenyouimportdatafromaMicrosoftExcelspreadsheet,anImportingExcelDatawindowappearsanddisplaysapreviewoftheChannelView.AnyvaluesthatLabVIEWSignalExpresscannotimportsuccessfullyappearwitherroriconsintheImportingExcelDatawindow.Movethecursoroveranerroricontodisplaymoreinformationabouttheerror.

ImportingSignalsfromFilesUsethestepsintheLoad/SaveSignalsmenutoimportfilesintoLabVIEWSignalExpress.YoucanimportsignalsfromASCIItext,.lvm,SPICE,PSpice,andMultisimfiles.Afteryouimportdata,youcanusethedataasaninputsignalforothersteps.

SavingDatatoFilesYoucansaveorexportasignalorvaluetoafileinLabVIEWSignalExpressinthefollowingways:

Right-clickanoutputonastepandselectSaveValuefromtheshortcutmenutosavethesignalorvaluetoatextfile.Right-clickanoutputonastepandselectCopyValuefromtheshortcutmenutocopythedatatotheclipboard.YoucanpastethedataintootherapplicationssuchasMicrosoftExcelandNotepad.OpenMicrosoftExcelanddragthestepoutputtoanExcelworksheet.UsetheSavetoASCII/LVMsteptowritesignalsorvaluestoatextfileafterasteporseriesofstepscompletesexecution.UseLabVIEWSignalExpressdataloggingfeaturestocreatelogsofyoursignalsinthe.tdmsfileformat.Right-clickaloggedsignalintheLoggedDatawindowandselecttheConverttoASCIIoptiontosaveloggeddataintheASCIIformat.

WhenyouusetheSavetoASCII/LVMstep,LabVIEWSignalExpresssavessignalsandvaluesintheLabVIEWmeasurementdatafileformat,whichisatab-delimitedtextfileyoucanopenwithaspreadsheetapplicationoratext-editingapplication.RefertotheSpecificationfortheLabVIEWMeasurementFile(.lvm)applicationnoteformoreinformationaboutthisfileformat.

SnapshotsSnapshotsallowyoutosavearecordofthecurrentvaluesofanysignalinyourproject.YoucanviewsnapshotvaluesontheDataViewtab.Youalsocansavethesevaluestofileorrunthemthroughanalysissteps.Youcanusesnapshotstocomparedatawithinthesameproject.Forexample,youcanacquiredataandcreateasnapshotofthedatawhentheacquisitiontaskiscomplete.Completeanewacquisitiontaskwithdifferentsettingsandcreateanothersnapshotofthedataafteryoucompletetheacquisitiontask.DrageachofthesnapshotstotheDataViewtabtoviewandcomparethedata.SelectOperate»CreateSnapshottoopentheCreateSnapshotdialogbox.Usethisdialogboxtoselectthesignalstoincludeinthesnapshot,andclicktheOKbuttontoclosethedialogboxandcreateasnapshotofthesignalsyouselect.ThesnapshotappearsintheLoggedDatawindow.IntheLoggedDatawindow,expandthesnapshotandright-clickasignalinthesnapshottodisplayashortcutmenuwithvariousoptions,suchassavingthesnapshotofthatsignaltoatextfileand/orsendingthesignalsnapshotdatatoananalysisstep.LabVIEWSignalExpressautomaticallysavessnapshotdataintheprojectfile.Youalsocanimportsnapshotsfromanotherproject.SelectFile»Import»SnapshotsFromAnotherProjecttoselecttheprojectfilefromwhichyouwanttoimportsnapshots.

DefiningDataValuesYoucanusetheDefineSignaldialogboxtodefineadatavalueforalimittest.TodefineacornerDataPoint,clicktheInsertbuttonbelowthetableorentertheXandYvaluesinthetable.Thenewpointappearsonthegraph.Youcanchangethepositionofapointbyclickingthepointonthegraphandmovingit.Ifyoumoveanypointpastanotherdatapoint,thetableautomaticallyreordersandincreasestheXcolumnvalues.YoucanrescaletheentirelimitsignalbyenteringnewvaluesintheNewmin.andNewmax.fieldsintheRescalelimitsection.YoucansavethedatapointsthatdefinethelimittoafileusingtheSaveDatabutton.YoualsocanloaddatapointsfromafileusingtheLoadDatabutton.LabVIEWSignalExpressusestheLabVIEWmeasurement.lvmformat.ThefollowinggraphicisanexampleofusingtheDefineSignaldialogboxtodefinetheupperlimitofatime-domainsignal.

ThefollowinggraphicisanexampleofusingtheDefineSignaldialogboxtodefinetheupperlimitofafrequency-domainsignalusing

logarithmicfrequencyaxis.

TimestampsinLabVIEWSignalExpressTime-domainsignalsuseatimestamp,whichisavaluethatprovidesinformationaboutwhenthesignalbegan.Dependingonthesourceofthesignalandtheactualprocessingstepsyouaddedtotheproject,thetimestampofthesignalcanbeanabsoluteorrelativetimestamp,orLabVIEWSignalExpresscanignorethetimestamp.Anabsolutetimestampvaluerepresentsanactualdateandtime,suchas12:37p.m.,April6.Somedataacquisitionboards,suchastheE-Seriesacquisitionboard,canreturnabsolutetimestamps,whichyoucanuseforaccuratedatalogging.Arelativetimestamprepresentsatimevaluethatisrelativetoaknownreferenceevent,suchasthestartofanacquisitionorthetriggerpoint.Forexample,acontinuousacquisitionofasignalmighthaveatimestampvaluerelativetothetriggerpointofthesignal.Timestampsalsocanberelativetoothertimestamps.Forexample,youcanextractasubsetofasignalstartingatatimethatisrelativetothebeginningofthatsignal.Ifyouignorethetimestamp,youcanperformoperationslikeadditionorsubtractiononthetwosignalsindependentlyoftheactualtimestampvalues.Forexample,youcanaddthesignalsasiftheywerealignedperfectly,whichisusefulifyouwanttocompareatriggeredsignaltoamodelthatoriginatesfromafile.Severalprocessingstepsworkoncontinuoussignalsandassumethatthedataarecontiguous.Forexample,theFilterstepresetsthefilterhistorywhenyoucallitthefirsttime,buttheninsubsequentcalls,thestepfilterstheincomingtimesignalsegmentsusingthehistoryinformationoftheprevioussegmentaslongasthetimestampsarecontiguous.IftheFilterstepdetectsatimediscontinuity,suchasamissingsegmentoraninconsistencyintimestamps,theFilterstepresetsitselfandreturnsawarning.Usingrelativetimestampsinacontinuousacquisitiondoesnotconflictwiththetimestampcontinuityrequirements.NationalInstrumentsrecommendsusingrelativetimestampsasthedefaultmodeforallstepsthatcandeliveracontinuoussignal,suchasstepsthatacquireorcreatesignals.Useabsolutetimestampsonlywhenyourequireabsolutedateandclockinformation.Avoidignoringtimestampswhenpossible.

SharedVariablesSharedvariablesareapplication-independentconfiguredsoftwareitemsthatenableyoutosenddataacrossprojectsoracrossanetwork.

ViewingSharedVariablesYoucanusetheChannelViewtodisplayandmanagesharedvariablesthatexistonthelocalmachineorlocalnetwork.IntheChannelView,selectSharedVariablesfromtheViewpull-downmenu.ExpandLocalhosttodisplaysharedvariablesthatareavailableonthelocalmachine.ExpandNetworkNeighborhoodtodisplaymachinesonthelocalnetwork.LabVIEWSignalExpressrecognizessharedvariablescreatedinLabVIEWSignalExpressandLabVIEW,aswellasdatapublishedusingDataSockettechnologyordatathatmeetsOPCspecifications.

NoteInthishelptopic,thetermsharedvariablealsoappliestodatapublishedusingDataSockettechnologyordatathatmeetsOPCspecifications.Refertoni.comformoreinformationaboutDataSockettechnology.RefertotheOPCFoundationWebsiteformoreinformationaboutOPCspecifications.

ReadingSharedVariablesUsetheReadSharedVariablessteptoreadsharedvariablesinLabVIEWSignalExpress.TheReadSharedVariablesstepreadsthevalueofasharedvariableandreturnsthevalueasanoutputyoucansendtoothersteps.YoualsocanusetheChannelViewtoreadthevalueofasharedvariable.PlaceacheckmarkintheAcquirecheckboxforasharedvariabletoreadthevalueofthevariable.LabVIEWSignalExpressautomaticallyconfiguresaReadSharedVariablesstepandaddsthesteptotheProjectView.PlaceacheckmarkintheAcquirecheckboxforamachinetoreadthevaluesofalltheavailablesharedvariablesonthemachine.LabVIEWSignalExpressusesoneReadSharedVariablessteptoreadthevaluesofallthesharedvariables.

NoteYoucanusetheSamplePeriod(s)columnoftheChannelViewortheSampleperiod(s)parameteroftheReadSharedVariablessteptospecifyhowfrequentlyLabVIEWSignalExpressreadsthevalueofthesharedvariable.

WritingtoSharedVariablesYoucanwritesignalsinaLabVIEWSignalExpressprojecttosharedvariablessothatotherprojectscanusethevalueofthesignal.Right-clickastepinputoroutputsignalandselectWritetoSharedVariablefromtheshortcutmenutowritethevalueofthesignaltoasharedvariable.Thenameofthesignalappearswithaglobeicon( )thatindicatesitisasharedvariable.Youalsocanright-clickasharedvariableinputoroutputandselectWritetoSharedVariablefromtheshortcutmenutostopsharingthevalueofthesignal.LabVIEWSignalExpressautomaticallysharesanysharedvariablesyoucreateonthelocalnetwork.Thesharedvariableappearsatthepath\\hostname\NI_SIGX_projectname,wherehostnameisthenameofthemachineonwhichyoucreatethevariableandprojectnameisthenameoftheLabVIEWSignalExpressprojectinwhichyoucreatethevariable.

NoteLabVIEWSignalExpressremovessharedvariablesfromthelocalnetworkwhenyouclosetheprojectthatcreatesthesharedvariable(s).

AcquireSpecifieswhethertoacquire,orreadthevalueof,thesharedvariable.LabVIEWSignalExpressusestheReadSharedVariablessteptoacquirethevalueofthesharedvariable.

NameDisplaysthenameofthesharedvariable.

PathDisplaysthepathtothesharedvariable.

SamplePeriod(s)Specifiestheperiod(inseconds)atwhichtoreaddatafromthesharedvariable.

ControllingtheExecutionofaProjectWhenyouexecute,orrun,aLabVIEWSignalExpressproject,LabVIEWSignalExpressexecutesallthestepsthattheprojectcontainsatleastonce.YoucancontroltheexecutionofaprojectbyorderingstepsintheProjectViewtocreateexecutiondependencies,configuringtherunmodeofaproject,usingExecutionControlsteps,orusinghardware.

ControllingProjectExecutionbyOrderingStepsTheorderinwhichstepsexecutepartiallydependsontheorderinwhichtheyappearintheProjectView.Stepsthatinheritsignalsfromotherstepsexecutesequentially.Forexample,stepsthatprovideoutputsignalsmustappearintheProjectViewbeforestepsthatrequirethosesignalsasinputs.Astepthatreceivesasignalhasanexecutiondependencyonthestepthatsendsthesignal.LabVIEWSignalExpressdrawsblueexecutionloopsaroundgroupsofstepswithmutualexecutiondependencies.

ControllingProjectExecutionbyConfiguringRunModesYoucanconfigurehowmanytimesanentireprojectrunsbyconfiguringtherunmodefortheproject.YoucanconfigureLabVIEWSignalExpresstorunaprojectonce,foranumberofiterationsyouspecify,orforanamountoftimeyouspecify.

ControllingExecutionwithStepsYoucanusethefollowingExecutionControlstepstocontroltheexecutionofsomeorallstepsinaproject:

Sweep—Iteratesasetofstepsthenumberoftimesyouspecify.ConditionalRepeat—Iteratesasetofstepsuntilaspecifiedconditionoccurs.Trigger—Setsatriggerconditionandreturnsasectionofacontinuoussignalwhentheconditionoccurs.Sequence—Pausesandresumesexecutionofstepsinaprojectbasedontheconfigurationyouspecify.TheSequencestepcanpausetheexecutionofastepwithoutstoppingtheexecutionoftheentireproject.BecausetheSequencestepcanpausetheexecutionofothersteps,youcanusetheSequencesteptoallowmultiplestepsinthesameprojecttousethesamehardware.

ControllingExecutionwithHardwareYoucanusethetriggeringfunctionalityofvariousinstrumentstocontroltheexecutionofstepsoraproject.UsetheAcquireSignalsorGenerateSignalsstepstoconfiguretriggerswhenyouusehardwarewithLabVIEWSignalExpress.

RunModesBydefault,LabVIEWSignalExpressrunsprojectscontinuouslywhenyouclicktheRunbutton.However,youcanconfigureLabVIEWSignalExpresstorunaprojectonce,foranumberofiterationsyouspecify,orforanamountoftimeyouspecify.Ifyourunaprojectonce,theprojectisinRunOncemode.Ifyourunaprojectcontinuously,theprojectisinRunContinuousmode.Ifyourunaprojectforanumberofiterationsoranamountoftimeyouspecify,theprojectisinRunContinuousmodeuntilthestopconditionoccurs.UseRunOncemodeifyouwantthestepsinaprojecttoexecuteonlyonce.Forexample,ifyouuseaSweepsteptocontroltheexecutionofstepsinaproject,youmightnotwanttheSweepsteptocontinuerunningafterititeratesthroughthevaluesyouspecifywhenyouconfiguretheSweepstep.UseRunContinuousmodeifaprojectcontainsstepsthatoperateonsignalsiteratively,suchasstepsthatfilteroraveragesignals.Forexample,ifyouusethePowerSpectrumsteptoaveragedatainaproject,thestepaveragesthedataovertimewitheachiterationoftheproject.Ifyoudonotruntheprojectcontinuously,youcannotaveragethedatabecauseLabVIEWSignalExpressresetsthePowerSpectrumstepeachtimeyouruntheprojectinRunOncemode.Ifyouconfigureaprojecttorunforaspecifiednumberofiterationsoraspecifiedtimeinseconds,theprojectrunsinRunContinuousmodeuntilthestopconditionoccurs.Forexample,ifyouconfigureaprojecttorunfor30seconds,theprojectexecutesasifyousettheprojecttoruncontinuously,clickedtheRunbutton,andthenclickedtheStopbutton30secondslater.

NoteIfyouconfigureaprojecttorunforaspecificamountoftime,LabVIEWSignalExpressusessoftwaretimingtodeterminehowlongtheprojectruns.Youcannotusehardwaretimingtocontrolhowlongaprojectruns.

ConfiguringRunModesClickthedownarrowontheRunbuttonandselectRunContinuously,RunOnce,orConfigureRuntospecifytherunmodeyouwanttouse.YoualsocanaccessrunmodeconfigurationoptionsfromtheOperatemenu.WhenyouselectConfigureRun,theConfigureRundialogboxappears.Youcanusethisdialogboxtospecifyanumberofiterationsoranamountoftimeinsecondsforwhichyouwanttheprojecttorun.Youalsocancreateasnapshotofallthesignalsintheprojectwhentheprojectfinishesrunning.Afteryouconfiguretherunmode,theiconontheRunbuttonupdatestoreflecttheconfiguration.Youconfigurerunmodesonaper-projectbasis.Whenyousaveaproject,LabVIEWSignalExpressalsosavestheconfigurationoftheRunbutton.

ConversionstoandfromLabVIEWVIsWhenyouconvertaLabVIEWSignalExpressprojecttoaLabVIEWblockdiagram,thegeneratedVIrunsinthemodeyouconfiguredfortheprojectunlessyouedittheVItochangehowtheVIruns.IfyouimportaLabVIEWSignalExpressprojectfromLabVIEW,youcanconfiguretherunmodethroughthepull-downmenuontheRunbuttonortheOperatemenu.

NoteIfaprojectincludesaRunLabVIEWVIstep,therunmodeyouconfiguredoesnotoverridetheexecutionofelementsoftheLabVIEWVI,suchasloops.

ResettingaProjectWhenyourunaproject,youcanresetallstepstotheirinitialstatebyclickingtheResetAllbutton.Resettingrestartstheprocessforthesteps.Forexample,ifyouhaveastepthataveragesaseriesofnumbers,clickingtheResetAllbuttonrestartstheaveragingfromthebeginning.

NoteResettingdoesnotresetparameterstotheirdefaultvalues.

YoualsocanrevertaprojecttoitslastsavedstatebyselectingFile»RevertProject.

SweepingTheSweepstepcontrolstheexecutionofotherstepsinaproject.UsetheSweepsteptoiterateasetofmeasurementstepsthenumberoftimesyouspecify.Eachiterationmodifiesoneormoreparametersofoneormorestepsinthemeasurement.MoststepsinLabVIEWSignalExpresshavesweepableparameters.WhenyouaddaSweepsteptotheProjectView,thestepappearsasaloop.PlacestepsinsidetheloopoftheSweepsteptocontroltheexecutionofthosestepsusingtheSweepstep.ThefollowingillustrationshowsaSweepstepthatiscontrollingtheexecutionofaCreateAnalogSignalstep.

YoucanusetheStepSetuptabfortheSweepsteptoconfigurearangeofvaluestosendtothestepstheSweepstepcontrols.YoualsocandefineoutputsfortheSweepstepandconfigureparallelandnestedsweepoperations.RefertoChapter5,PerformingSweepMeasurements,intheGettingStartedwithLabVIEWSignalExpressmanualformoreinformationaboutsweeping.

ConfiguringaSweepRangeTheSweepstepcontrolstheexecutionofotherstepsinaproject.YoucanusetheSweepsteptoconfigurearangeofvaluestosendtothestepsitcontrols.Forexample,youcanusetheSweepsteptochangethefrequencyvalueofasignalyoucreatewiththeCreateAnalogSignalstep.OntheStepSetuptabfortheSweepstep,addFrequency(Hz)totheSweepableparameterslist.ThenusetheConfigurationoptionstoselectthetypeofsweepyouwanttoperformanddefinetherangeofvaluesyouwanttouseforthesweep.Youcandefinetherangeasalinearrange,anexponentialrange,alistofpoints,aformula,orbyusingafilethatcontainsalistofvalues.Whenyouruntheproject,theSweepstepusestheConfigurationsettingsyouspecifytochangethefrequencyvalueoftheCreateAnalogSignalstepwitheachiterationofthesweep.WhenyouconfiguretheSweepstep,theProjectViewupdatessothattheSweepstepenclosesthestepsitcontrols.Inthepreviousexample,theSweepstepenclosestheCreateAnalogSignalstep.Whenyourunaprojectwithasweep,theSweepstepgenerateseachvalueinthesweeprangeandpassesthevaluestothestepsitcontrolstodefinenewvaluesforeachiteration.Youalsocandefinetheoutputsofasweepoperation.YoucanusetheSweepsteptoperformaparallelsweepthatsetsvaluesonmultipleparametersandmultiplestepssimultaneously.YoualsocanperformanestedsweepbyenclosingaSweepstepwithinanotherSweepstep.

DefiningSweepOperationOutputsYoucanspecifyoutputsofasweepoperationtotrackhowtheparametersyousweepaffectothervaluesintheproject.Forexample,ifyousweepthefrequencyofastimulussignal,youmightwanttotracktheRMSvoltagelevelduringthesweepoperationtoseehowtheRMSlevelchangesinresponsetothechangingfrequency.YouthencanviewagraphoftheRMSlevelversusfrequencyontheDataViewtab.Completethefollowingstepstodefineoutputsforasweepoperation.

1. ConfiguretheSweepstepusingtheSweepConfigurationpageoftheStepSetuptabforthestep.Todefineasweepoperationoutput,youmustspecifyatleastoneparameterintheSweepableparametersfield.

2. SwitchtotheSweepOutputpageoftheStepSetuptabfortheSweepstep.

3. ClicktheAddbuttontodisplaytheEditSweepOutputdialogbox.TheOutput(Y-Axis)fielddisplaysoutputsofstepsinthesweepoperation.TheInput(X-Axis)fielddisplaysthesweepableparametersyouspecifiedontheSweepConfigurationpage.

4. SelectanoutputfromtheOutput(Y-Axis)field.Whenyougraphthesweepoperationoutput,thisvalueappearsontheY-axisofthegraph.Thisisthevaluethatyouexpecttochangeasaresultofthechangingvalueoftheparameteryousweep.

5. SelectasweepableparameterfromtheInput(X-Axis)field.Whenyougraphthesweepoperationoutput,thisvalueappearsontheX-axisofthegraph.Thisistheparameterthatchangesvaluewitheachiterationofthesweep.

6. ClicktheOKbutton.ThesweepoperationoutputappearsasanoutputoftheSweepstepintheProjectView.

NoteIfyouspecifiedtwoscalarvaluesfortheInput(X-Axis)andOutput(Y-Axis),theoutputisasingleXYwaveform.ThenumberofdatapointsinthewaveformmatchestheNumberofpointsyouspecifyontheSweepConfigurationpageoftheStepSetuptab.

IfyouspecifiedawaveformfortheInput(X-Axis)orOutput(Y-Axis),theoutputisanexpandablegroupofwaveforms.Eachwaveforminthegroupisthevalueofthewaveformduringan

iterationofthesweep.ThetotalnumberofwaveformsmatchestheNumberofpointsyouspecifyontheSweepConfigurationpageoftheStepSetuptab.

7. DragthesweepoperationoutputtotheDataViewtabtoplottheoutputonagraph.Forgroups,youcanplotanelementofthegrouportheentiregroup.

Youalsocandefineadvancedsweepoperationoutputsthatcomparetheoutputsofstepsaffectedbythesweepoperationinsteadofcomparingonestepoutputandonesweepableparameter.

DefiningAdvancedSweepOperationOutputsAdvancedsweepoperationoutputscomparetheoutputsofstepsaffectedbyasweepoperationinsteadofcomparingonestepoutputandonesweepableparameter.Completethefollowingstepstodefineadvancedsweepoperationoutputs.

1. ConfiguretheSweepstepusingtheSweepConfigurationpageoftheStepSetuptabforthestep.Todefineasweepoperationoutput,youmustspecifyatleastoneparameterintheSweepableparametersfield.

2. SwitchtotheSweepOutputpageoftheStepSetuptabfortheSweepstep.

3. ClicktheAddbuttontodisplaytheEditSweepOutputdialogbox.4. PlaceacheckmarkintheAdvancedcheckbox.TheOutput(Y-

Axis)andInputX-Axis(Advanced)fieldsdisplayoutputsofstepsinthesweepoperation.

NoteTheInputX-Axis(Advanced)fielddisplaysscalaroutputsonly.Youcannotdefineasweepoperationoutputthatcomparestwowaveforms.

5. SelectanoutputfromtheOutput(Y-Axis)field.Whenyougraphthesweepoperationoutput,thisvalueappearsontheY-axisofthegraph.

6. SelectanoutputfromtheInputX-Axis(Advanced)field.Whenyougraphthesweepoperationoutput,thisvalueappearsontheX-axisofthegraph.

7. ClicktheOKbutton.ThesweepoperationoutputappearsasanoutputoftheSweepstepintheProjectView.

8. DragthesweepoperationoutputtotheDataViewtabtoplottheoutputonagraph.Iftheoutputisagroupofdata,youcanplotanelementofthegrouportheentiregroup.

ParallelandNestedSweepOperationsYoucanusetheSweepsteptoperformaparallelsweepoperationthatsetsvaluesonmultiplestepparametersandmultiplestepssimultaneously.YoualsocanperformanestedsweepoperationbyenclosingaSweepstepwithinanotherSweepstep.

ParallelSweepsSweepingtwoormorestepparameterssimultaneouslyiscalledaparallelsweep.Forexample,ifyouwanttovarytheamplitudeofastimulussignal,youcanmaximizetheprecisionoftheacquisitionbyalsovaryingtheinputrangeofthedigitizerorMIOboardthatprovidesthesignal.Asthesignallevelgetshigher,youcanincreasetheinputrangeofthemeasurementdevicetoensureyouusetheentireresolutionforthemeasurement.Toconfigureaparallelsweep,navigatetotheStepSetuptabfortheSweepstepandaddtheparametersyouwanttosweeptotheSweepableparameterslistontheSweepConfigurationpage.

NestedSweepsYoucanperformnestedsweepstoiteratethroughonerangeofvalueswhileyouvaryanotherrangeofvalues.Forexample,youmightwanttosweepthroughfrequenciesofastimulussignalatdifferentamplitudes.Usinganestedsweep,youcansettheamplitudetolevel1andsweepthroughthefrequencies,thensettheamplitudetolevel2andsweepthroughthefrequencies,andsoon.Tocreateanestedsweep,right-clickaSweepstepintheProjectViewandselectAddnestedsweepfromtheshortcutmenu.AnewSweepstepappearsandenclosestheexistingSweepstep.ConfigurethenewSweepsteptosweeptheparameteryouwanttochangeeachtimetheoriginalSweepstepcompletesasweepoperation.

NoteYoucancontrolastepparameterwithonlyoneSweepstepatatime.IfaparameterissweptbyoneSweepstep,thesameoranotherSweepstepcannotsweepthatparameteragainineitheraparallelornestedsweep.

SweepableParametersThefollowingtableliststheparametersyoucanincludeinasweepoperationforeachstep.

StepName Parameter ConditionsCreateAnalogSignal Frequency OnlyifSignaltypeisSineWave,

SquareWave,TriangleWave,SawtoothWave,orFormula

Phase OnlyifSignaltypeisSineWave,SquareWave,TriangleWave,orSawtoothWave

Amplitude AllsignaltypesexceptDCSignalOffset AllsignaltypesDutycycle OnlyifSignaltypeisSquareWaveSamplerate AlwayssweepableBlocksize AlwayssweepableStartfreq. OnlyifSignaltypeisMulti-toneStopfreq. OnlyifSignaltypeisMulti-toneStepfreq. OnlyifSignaltypeisMulti-tone

CreateDigitalSignal Blocksize AlwayssweepableSamplerate Alwayssweepable

DAQmxAcquire Samplestoread

Alwayssweepable

Samplerate AlwayssweepableInputrangemaxvalue(perchannel)

Alwayssweepable

Inputrangeminvalue(perchannel)

Alwayssweepable

NI-SCOPEAcquire SampleRate AlwayssweepableRecordLength

Alwayssweepable

Channeli-Range

Onlyifchanneliisenabled

Channeli-Offset

Onlyifchanneliisenabled

TriggerDelay OnlyiftriggerTypeisnotImmediate

TriggerLevel OnlyiftriggerTypeisEdgeorHysteresis

VideoTriggerLineNumber

OnlyiftriggerTypeisVideo

NI-FGENStandardFunction

Frequency AlwayssweepableDutyCycle OnlyiffunctionTypeisSquareAmplitude AlwayssweepableOffset AlwayssweepablePhase Alwayssweepable

NI-FGENArbitraryWaveform

SampleRate OnlyifExtractfromwaveformisnotselected

Gain OnlyifExtractfromwaveformisnotselected

Offset OnlyifExtractfromwaveformisnotselected

Filter Cutoff OnlyifTypeisLowpassorHighpass

Lowcutoff OnlywhenTypeisBandpassorBandstop

Highcutoff OnlywhenTypeisBandpassorBandstop

Order OnlywhenModeisIIRFilterNumberoftaps

OnlywhenModeisFIRFilter

ScalingandConversion(TimeDomain)

Pre-gainoffset

Alwayssweepable

Gain AlwayssweepablePost-gainoffset

Alwayssweepable

ScalingandConversion(FrequencyDomain–Magnitude)

Gain Alwayssweepable

ScalingandConversion(FrequencyDomain–Phase)

Correctiondelay

Alwayssweepable

SubsetandResample

Startposition OnlywhenyouplaceacheckmarkintheExtractsubsetcheckbox

Length OnlywhenyouplaceacheckmarkintheExtractsubsetcheckbox

dt OnlywhenyouplaceacheckmarkintheResamplecheckbox

InteractiveAlignment x-offset OnlywhenModeisManualandyouplaceacheckmarkintheAllowx-offsetcheckbox

y-offset OnlywhenModeisManualandyouplaceacheckmarkintheAllowy-offsetcheckbox

x-gain OnlywhenModeisManualandyouplaceacheckmarkintheAllowx-gaincheckbox

y-gain OnlywhenModeisManualandyouplaceacheckmarkintheAllowy-gaincheckbox

PowerSpectrum Numberofavg.

Alwayssweepable

FrequencyResponse Numberofavg.

Alwayssweepable

Distortion Highestharm.

Alwayssweepable

Approx.fund.freq.

Alwayssweepable

ToneExtraction Approx.freq. AlwayssweepableLimitTest Upper

constantOnlywhenLimitssourceisUserDefinedConstants

Lowerconstant

OnlywhenLimitssourceisUserDefinedConstants

Uppergain OnlywhenLimitswindowbasedonisSingleLimit&Range

Upperoffset OnlywhenLimitswindowbasedonisSingleLimit&Range

Lowergain OnlywhenLimitswindowbasedonisSingleLimit&Range

Loweroffset OnlywhenLimitswindowbasedonisSingleLimit&Range

Limitconstant

OnlywhenLimitswindowbasedonisSingleLimit&Range

Thefollowingstepsdonotcontainparametersyoucanincludeinasweepoperation:

LoadfromASCIILoadfromLVMLoadfromSPICESavetoASCII/LVMTimeAveragingWindowArithmeticFormula(Scalar)AmplitudeandLevelsHistogramTimingandTransition

NoteSweepingNI-FGENStandardFunctionparametersdoesnotcausetheStartTriggertoberesentforeachiteration.Thedevicemayresetoneachiteration,dependingonwhichparametersyou

aresweeping.Duringthisdevicereset,theRTSIlinesmaybereset,resultinginwhatlookslikeafalsetrigger.Thisfalsetriggerdoesnotcorrelatewiththetimingofthestartofthegeneration.IfyouaretriggeringanNI-SCOPEAcquireorDAQmxAcquirestep,considermakingtheNI-SCOPEAcquireorDAQmxAcquirestepexecuteaftertheNI-FGENStandardFunctionstepbyplacingacheckmarkintheStartthisstepaftercheckboxontheExecutionControltab,andselectingtheNI-FGENStandardFunctionstepasthesteponwhichtowait.

SequencingStepstoReuseHardwareWhenyouconfigureasteptouseahardwaredevice,thestepreservesthedevicesothatnoothersteporotherapplicationcanusethedevice.However,youmightwanttoreusethesamedeviceinoneproject.YoucanuseaSequencesteptopausetheexecutionofotherstepsintheprojectwhileonestepusesthedevice,therebyallowingmultiplestepsinthesameprojecttousethesamehardware.Forexample,ifyouareusingadataacquisitiondeviceandyouwanttoacquiresignalsfromdifferentchannelsatdifferentrates,youcanusetheSequencesteptoacquireasignalfromonechannelatonerateandthenpausethatacquisitionwhileyouacquireasignalfromanotherchannelatanotherrate.IfyoutrytosetupthesameprojectwithoutaSequencestep,LabVIEWSignalExpressreturnsanerrorbecauseonlyoneexecutingstepcanuseasinglehardwaredeviceatatime.

NoteWhenyouusetheSequencesteptoreusehardware,youcannotperformacontinuoussignalacquisitionbecauseLabVIEWSignalExpressstopsandstartsthehardwaredevice.

Completethefollowingstepstoallowmultiplestepstousethesamehardware.

1. Installthehardwaredevice,connectittothePC,andconfigureLabVIEWSignalExpresstobeginacquiringsignalsfromthehardwaredevice.

2. AddaSequencesteptotheProjectViewaftertheAcquireSignalsstep.

3. OntheStepSetuptabfortheSequencestep,selectRunprecedingstepsbeforefollowingstepsandplaceacheckmarkintheAllowhardwarereusecheckbox.

4. AddanotherAcquireSignalssteptotheProjectView.5. ConfigurethesecondAcquireSignalssteptoacquireasignal

fromthesamehardwaredeviceasthefirstAcquireSignalsstep.6. ClicktheRunbuttontoruntheproject.Foreachiterationofthe

project,LabVIEWSignalExpressrunsthefirstAcquireSignalssteponce,pausestheexecutionofthatstepandreconfiguresthehardwaredeviceforthesecondacquisition,runsthesecondAcquireSignalssteponce,thenpausestheexecutionofthatstep

andreconfiguresthehardwaredeviceforthefirststep.

DataLoggingYoucanlogtimewaveform,scalar,orBooleansignalsyoucreateoracquireinLabVIEWSignalExpress,andyoucanusestepstoanalyzeandprocessloggedsignals.Usedataloggingtosave,review,andanalyzemeasurementsyoutakeinLabVIEWSignalExpress.

NoteLabVIEWSignalExpressalsosupportslimitedloggingoffrequency-domainsignals.

LoggingaSignalIfaprojectincludesstepswithvalidoutputsignals,youcanbeginloggingimmediatelybyclickingtheRecordbuttonandselectingasignalfromtheLoggingSignalsSelectiondialogbox.LabVIEWSignalExpressrunstheprojectandlogsthesignalcontinuouslyuntilyouclicktheStopbutton,andthelogappearsintheLoggedDatawindowatthebottomoftheProjectView.LabVIEWSignalExpresslogssignalsinblocksthatareequivalenttotheblocksize,ornumberofsamples,oftheacquiredsignal.Youconfiguretheblocksizeofasignalinthestepyouusetocreateoracquirethesignal.Likeastepoutput,youcandragaloggedsignalfromtheLoggedDatawindowtotheDataViewtabtodisplaythedata.Youcanscrollthroughtheloggedsignalandviewanyalarmsoreventsassociatedwiththelog.YoualsocanswitchtothePlaybackworkareatoplaybackandanalyzeloggedsignals.

NoteYoumustbeintheMonitor/Recordworkareatologasignal.

LabVIEWSignalExpresssavesloggeddatainthe.tdmsfileformattothedirectoryyouspecifyontheLoggingpageoftheOptionsdialogbox.The.tdmsfileisabinaryfilethatcontainswaveformdataandstoreswaveformproperties.Youalsocanimportloggeddatafrom.tdmsfilesyoupreviouslycreatedwithLabVIEWSignalExpress.LoggingWhileRunningIfyouwanttologasignaleverytimeyourunaproject,youcanspecifythesignal(s)torecordinoneofthefollowingways:

IntheProjectView,right-clickastepoutputandselectEnableRecordingfromtheshortcutmenutoenabledataloggingfortheoutput.SelectView»RecordingOptionstodisplaytheRecordingOptionstabandselectasignalorsignalsontheSignalSelectionpage.

NoteTheRecordingOptionstabalsoincludespagesyoucanusetoconfigureadvancedloggingoptions,suchasstartandstopconditions,alarms,andevents.

Whenyouuseoneofthepreviousmethodstoselectasignalorsignals

torecord,theRecordWhileRunningbuttonappearsinthetoolbar.EnsurethattheRecordWhileRunningbuttonisenabled,andclicktheRunbuttontobeginloggingthesignalsyouselected.LoggingFrequency-DomainSignalsYoucanlogthelastknownvalueofafrequency-domainsignalandviewthelogontheDataViewtab.Thelastknownvalueofthesignalisthevalueofthesignalwhentheprojectstopsrunning.IntheProjectView,right-clickafrequency-domainoutputsignalandselectRecordlastvaluefromtheshortcutmenutologthelastknownvalueofthesignal.LabVIEWSignalExpresssaveslogsoffrequency-domainsignalsinthe.tdmsfileformattothedefaultlocationyouspecifyontheLoggingpageoftheOptionsdialogbox.

NoteBecauseLabVIEWSignalExpressrecordsafrequency-domainsignalasasinglevalue,youcannotplaybackalogofafrequency-domainsignal.

ManagingMultipleDataLogsWhenyourecordmultiplelogs,themostrecentlogbecomestheactivelog.Ifyouareviewingthesignal(s)youareloggingontheDataViewtab,thedisplayupdatestodisplaythenewactivelog.ThenameoftheactivelogalsoappearsinboldintheLoggedDatawindow.IfyouareinthePlaybackworkarea,anystepsthatareusingtheloggedsignalasaninputupdatetousethenewactivelogastheinput.Youcanchangetheactivelogatanytimebyright-clickingthenameofalogintheLoggedDatawindowandselectingMakeActiveLogfromtheshortcutmenu.

LoggingaSignalCompletethefollowingstepstocreatealogofaspecifiedsignal.

1. PlacetheCreateAnalogSignalstepintheProjectView.2. IntheSignaltypepull-downmenu,selectNoiseSignal.3. IftheRecordingOptionstabisnotvisible,select

View»RecordingOptionstodisplaythetabandthedataloggingconfigurationoptions.

4. SelecttheSignalSelectionoptionintheCategorylisttodisplaytheSignalselectionpage.TheSignalselectionpagedisplaysthesignalsthatareavailabletolog.PlaceacheckmarkinthecheckboxnexttothewhiteGaussiannoisesignal.

Whenyouselecttorecordthesignal,theRecordbuttononthetoolbarchangestotheRecordWhileRunningbutton.WhentheRecordWhileRunningbuttonispressed,youcanpresstheRunbuttontologtheselectedsignal.

5. SelecttheLogSummaryoptionintheCategorylisttodisplaytheLogSummarypage.SpecifythenameofthelogintheLogtitletextboxandprovideadescriptionofthelogintheLogdescriptiontextbox.

6. ClicktheRunbuttononthetoolbartobeginloggingthesignal.NoteChangingtheconfigurationofaLabVIEWSignalExpressprojectduringadataloggingoperationstopsthecurrentdataloggingoperation.

7. Whenyouarereadytostoploggingthesignal,clicktheStopbuttononthetoolbar.

NoteYoualsocanconfigureloggingtostartandstopaccordingtouser-definedconditions.UsetheStartConditionspagetoconfigureloggingstartconditionsandtheStopConditionspagetoconfigureloggingstopconditions.

TheloggedsignalappearsintheLoggedDatawindow.Toviewaloggedsignal,dragtheloggedsignaltotheDataView.YoualsocananalyzetheloggedsignalusinganalysisstepsbyswitchingtothePlaybackworkareatoprocessaspecificlog.

AlarmsandEventsYoucanusetheAlarmsandEventspagesoftheRecordingOptionstabtospecifyconditionsunderwhichLabVIEWSignalExpressrecordsanalarmoraneventinaloggedsignal.

AlarmsAnalarmisanotificationofasignalstate.Youcanconfigurealarmstoactivatewhenasignalisgreaterthanaspecifiedvalue,lessthanaspecifiedvalue,orwithinoroutsideofaspecifiedrangeofvalues.ForBooleansignals,youcanconfigureanalarmtoactivatewhenthesignalbecomesTRUEorFALSE.LabVIEWSignalExpressautomaticallyrecordschangesinthealarmstate,orwhenanalarmactivatesordeactivates,inthelogfile.WhenyoudragaloggedsignaltotheDataViewtab,thegraphdisplaysmarkersatthelocationswherethealarmstatechangesduringtheloggingoperation.YoualsocanconfigureactionsforLabVIEWSignalExpresstotakewhenanalarmstatechanges.Forexample,youcangenerateasound,displayamessagetotheuser,generateasoftwaretrigger,createasnapshot,orexecuteacommandtorunaprogram.

EventsAneventisanoccurrenceataspecificpointintime.YoucanconfigureLabVIEWSignalExpresstoacknowledgekeystrokeorsignal-basedevents.Forkeystrokeevents,LabVIEWSignalExpressrecordsaneventinthelogwhenauserpressesthekeyorcombinationofkeysyouspecify.Forsignal-basedevents,LabVIEWSignalExpressrecordsaneventinthelogwhenasourcesignalshowsarisingslope,afallingslope,orwhenthesignalentersorleavesawindowofvaluesyouspecify.Useeventswhenyouwanttonoteanoccurrenceduringlogging.Forexample,ifyouareloggingsoundpressureinanareawithoutsidenoise,youcanconfigureakeystrokeeventsothatausercanpressthekeyeachtimeanoiseoccursthatisnotrelevanttothesignalyouarerecording.LabVIEWSignalExpressautomaticallyrecordseventsinthelogfile,andyoucanspecifyanannotationtodisplayonthegraphontheDataViewtabwhentheeventoccurs.Youalsocanprompttheusertoenteranannotationatthetimeakeystrokeeventoccurs.

ViewingAlarmsandEventsLabVIEWSignalExpressdisplaysalarmstatechangesandeventsonthegraphofaloggedsignal,butalarmstatechangesandeventsmightbedifficulttolocateinlonglogs.YoucanusetheEventViewertonavigatetoandzoominonalarmstatechangesandevents.Right-clickagraphontheDataViewtabandselectVisibleItems»EventViewerfromtheshortcutmenutodisplaytheEventViewer.TheEventViewerdisplayssimilarinformationtotheEventLogtab,andlistseachalarmstatechangeandeventthatoccurred,aswellaserrors,warning,datalossnotifications,andinformationalmessages.Double-clickanalarmstatechangeoreventintheEventViewertozoominontheportionofthegraphwherethealarmstatechangeoreventoccurred.YoualsocanusethePreviewgraphtozoominonaportionofaloggedsignalandviewaspecificalarmstatechangeorevent.Ifyouwanttoseealistofalarmstatechangesandeventsthatyoucanexporttoatextfile,right-clickaloggedsignalintheLoggedDatawindowandselectShowAlarmsandEventsfromtheshortcutmenu.ClicktheExportbuttoninthewindowthatappearstosavethelistasatextfile.

ImportingLoggedDataYoucanimportloggedsignalsintoaLabVIEWSignalExpressprojectfromanotherLabVIEWSignalExpressprojectorfroma.tdmsfileyoupreviouslycreatedinLabVIEWSignalExpress.SelectFile»Import»LoggedSignalsFromAnotherProjecttoselectaprojectfilefromwhichtoimportloggeddata.LabVIEWSignalExpressaddsalltheloggedsignalsfromtheprojectyouselecttotheLoggedDatawindowofthecurrentproject.SelectFile»Import»LoggedSignalsfromSignalExpressTDMSFilestoselecta.tdmsfilefromwhichtoimportloggeddata.LabVIEWSignalExpressaddsthelogassociatedwiththe.tdmsfiletotheLoggedDatawindowofthecurrentproject.

NoteYoucanselectanindividual.tdmsfileorafolderthatcontainsthe.tdmsfiletoimporttheloggeddata.LabVIEWSignalExpressimportsalltheinformationassociatedwiththeloggeddataregardlessofwhetheryouselectthefileorafolderthatcontainsthefile.

ConvertingLogstoASCIIFilesYoucanconvertloggedsignalsinLabVIEWSignalExpresstoanASCIIformattextfile.TheASCIIfileincludesthedate,starttime,andnameofthelogandliststhevaluesofeverydatapointloggedforeverysignalinthelog.ToconvertalogtoanASCIIfile,right-clickasignalorgroupofsignalsintheLoggedDatawindowandselectConverttoASCIIfromtheshortcutmenu.LabVIEWSignalExpresspromptsyouforanameandlocationtousetosavethetextfile.

NoteLabVIEWSignalExpresssupportsimportingASCIIfilesaslivedataonly.YoucannotimportdatainanASCIIfilebackintoLabVIEWSignalExpressasalog.IfyouwanttoimportloggeddataintoLabVIEWSignalExpress,youmustimportthedatafromanotherLabVIEWSignalExpressprojectorfroma.tdmsfile.

ExportingLogstoMicrosoftExcelYoucanexportloggedsignalsfromLabVIEWSignalExpresstoMicrosoftExcel.LabVIEWSignalExpressexportsthedate,starttime,andnameofthelog,andliststhevaluesofeverydatapointloggedforeverysignalinthelog.ToexportalogtoMicrosoftExcel,right-clickasignalorgroupofsignalsintheLoggedDatawindowandselectExporttoMicrosoftExcelfromtheshortcutmenu.

NoteWhenyouexportdatatoMicrosoftExcel,LabVIEWSignalExpresscopiesdatasamplestoaclipboardforexport.UsetheMaximumClipboardDataExportSizeoptionontheDatapageoftheOptionsdialogboxtoincreasethenumberofdatasamplestheclipboardcancontain.Dependingontheamountofmemoryonamachine,largelogfilesmightnotexportsuccessfully.

IfMicrosoftExcelisnotrunningwhenyouexportalogfile,LabVIEWSignalExpressopensMicrosoftExcelanddisplaystheexporteddatainanewbookfile.IfMicrosoftExcelisrunningwhenyouexportalogfile,LabVIEWSignalExpressaddsworksheetscontainingtheexporteddatatotheactivebookfile.Ifalogcontainsmultiplesignals,eachsignalappearsonaseparateworksheet.

NoteLabVIEWSignalExpresssupportsimportingloggeddatafrom.tdmsfilesorotherLabVIEWSignalExpressprojectsonly.YoucannotimportloggeddatafromMicrosoftExcel.

LabVIEWSignalExpressdoesnotsavetheMicrosoftExcelfile.YoumustsavetheexportedfilemanuallyinMicrosoftExcel.

RunningProjectsinOperatorModeOperatormodeprovidesawaytodisableeditingcapabilitiesforLabVIEWSignalExpressprojects.Disablingeditingcapabilitiescanbeusefulifyouwanttodistributeaprojecttootherusers.Forexample,ifyoucreateaprojectthatgeneratesasignal,youcanconfiguretheprojectsothatinoperatormodeauseronlycanadjustthefrequencyofthesignal.Youalsocanuseoperatormodetocreateaninterfacewithalimitedsetofcontrolsthatiseasytouseandlearn.Youcansetapasswordonaprojectsothatausermustenterthepasswordtodisableoperatormode.Ifyousaveaprojectinoperatormode,theprojectalwaysopensinoperatormodeunlessyousavetheprojectagainwithoperatormodedisabled.Ifyouwanttoallowausertochangesignalvaluesonaprojectinoperatormode,youmustcreateanoperatorinterface.Anoperatorinterfacecontainscontrolsthatyoubindtospecificstepparameterssothatinoperatormode,changingthevalueofthecontrolchangesthevalueofthestepparameter.UsetheOperatorInterfaceviewandtheToolboxandPropertieswindowstocreateanoperatorinterface.

NoteIfyousaveaprojectinoperatormode,LabVIEWSignalExpresssavestheprojectwithitsinitialsignalvalues,regardlessofwhetheryouchangethevaluewithacontrol.

Afteryouconfigureaprojectwithanoperatorinterface,selectOperate»OperatorMode»OperatorModeEnabledorclicktheOperatorModeEnabledbuttonontheOperatorInterfaceviewtoenableoperatormode.Whenaprojectisinoperatormode,onlytheRunandRecordbuttonsappearinthetoolbar,andalimitedsetofmenusandmenuoptionsareavailable.Youcannotdisplayanyadditionaltabsorviewswhenaprojectisinoperatormode,andyoucannotadd,delete,orconfiguresteps.ConfigureLabVIEWSignalExpresstodisplayallthetabs,views,andstepsyouneedbeforeyouenableoperatormode.Ifaprojectisinoperatormode,selectingOperate»OperatorMode»OperatorModeEnabledorclickingtheOperatorModeEnabledbuttonontheOperatorInterfaceviewdisablesoperatormode.

SettinganOperatorModePasswordBeforeyouenableoperatormode,youcanspecifyapasswordthatausermustentertodisableoperatormode.SelectOperate»OperatorMode»SetOperatorModePasswordorclicktheSetOperatorModePasswordbuttonontheOperatorInterfaceviewtosetanoperatormodepassword.Whenyousavetheproject,LabVIEWSignalExpresssavesthepasswordwiththeproject.

NoteLabVIEWSignalExpressdoesnotencryptoperatormodepasswords.Useoperatormodepasswordsforsimpleaccesscontrol.

CreatinganOperatorInterfaceWhenaprojectisinoperatormode,LabVIEWSignalExpressallowslimitedinteractionwiththeproject.Forexample,youcannotchangeconfigurationoptionsontheStepSetuptabwhenaprojectisinoperatormode.However,ifyoudistributeaprojectsavedinoperatormodetootherusers,youmightwanttoallowtheuserstomodifycertainstepconfigurationsettings.Youcanallowlimitededitingbyconfiguringanoperatorinterfacewithcontrolsboundtovariousstepparametersbeforeyouenableoperatormode.

NoteYoucannotconfigureanoperatorinterfacewhenaprojectisinoperatormode.

Completethefollowingstepstoconfigureanoperatorinterface.1. IftheOperatorInterfaceviewisnotvisible,select

View»OperatorInterfacetodisplaytheOperatorInterfaceview.2. IftheToolboxwindowisnotvisible,selectView»Toolboxor

right-clickintheOperatorInterfaceviewandselectToolboxfromtheshortcutmenutodisplaytheToolboxwindow.TheToolboxwindowdisplaysalistofcontrolsyoucanaddtotheOperatorInterfaceview.

3. SelectacontrolintheToolboxwindowanddragthecontroltotheOperatorInterfaceview.Thecontrolappearswithresizinghandlesandasmallarrowicon( ).

4. ClickthesmallarrowicontodisplayaTaskswindowyoucanusetoconfigurebasicpropertiesofthecontrol,suchasacaption,initialvalue,andrangeofselectablevalues.

5. IntheTaskswindow,clicktheEditBoundParameterslinktobindthecontroltoparametersofstepsintheproject.

6. (Optional)SelectView»Propertiesorright-clickacontrolandselectPropertiesfromtheshortcutmenutodisplaythePropertieswindow.UsethePropertieswindowandconfigureadditionalpropertiesofacontrol.Forexample,thePropertieswindowdisplaysadditionalappearanceandbehaviorconfigurationproperties.

7. ClicktheOperatorModeEnabledbuttonontheOperatorInterfacevieworselectOperate»OperatorMode»Operator

ModeEnabledtoenableoperatormode.Noticethatalimitedsetoftoolbarbuttonsandmenuitemsappearinoperatormode.

8. IntheProjectView,findastepthatcontainsaboundparameter,dragtheoutputofthesteptotheDataViewtab,andruntheproject.

9. Whiletheprojectisrunning,usethecontroltoseehowchangingthevalueoftheboundparameterchangesthevalueofthesignal.

10. Savetheproject.

BindingOperatorInterfaceControlstoStepParametersWhenyouenableoperatormode,LabVIEWSignalExpresslimitstheamountofinteractionuserscanhavewithaproject.However,youcancreateanoperatorinterfacethatallowsausertoadjustthevaluesofcertainstepparameterswhenoperatormodeisenabled.YoucreateanoperatorinterfacebyaddingcontrolstotheOperatorInterfaceview,andyouenablethosecontrolstoadjuststepparametervaluesbybindingthecontrolstoaspecificparameterorsetofparameters.

NoteYoucannotbindtextorlabelcontrolstostepparameters.Youcanbindasingleringcontroltooneparameteronly.

Completethefollowingstepstobindanoperatorinterfacecontroltoastepparameter.

1. Selectacontrolontheoperatorinterface.Resizinghandlesandasmallarrowicon( )appear.

2. ClickthesmallarrowicontodisplaytheTaskswindow.3. IntheTaskswindow,clicktheEditBoundParameterslinkto

displaytheBoundParametersListdialogbox.Thisdialogboxbindsthecontroltoparametersofstepsintheproject.

NoteYoualsocandisplaytheBoundParametersListdialogboxfromthePropertieswindow.DisplaythePropertieswindow,selectacontrolontheoperatorinterface,andselecttheBoundParameterspropertythatappearsunderParameterBindinginthePropertieswindow.ClickthebuttonthatappearsnexttothevalueofBoundParameterstodisplaytheBoundParametersListdialogbox.

4. IntheBoundParametersListdialogbox,clicktheAddbuttonundertheMemberslisttodisplaytheBoundParameterEditorwindow,whichdisplaysalistofallthestepsintheproject.

5. IntheBoundParameterEditorwindow,clicktheexpandiconnexttoasteptodisplaytheparametersofthesteptowhichyoucanbindthecontrol.

6. SelectaparameterandclicktheOKbutton.TheparameterappearsintheMemberslistoftheBoundParametersList

dialogbox.ThePropertieslistalsoupdatestodisplaypropertiesoftheparameteryouselect.ExpandapropertyinthePropertieslisttoedittheproperty.YoualsocanusetheScaleoptiontospecifyhowchangingthevalueofthecontrolchangesthevalueoftheproperty.Forexample,ifyouspecifyaMultiplierof2,incrementingthecontrolvalueby1actuallyincrementsthepropertyvalueby2.

7. (Optional)Repeatsteps4through6tobindthecontroltoadditionalparameters.

8. ClicktheOKbuttontoclosetheBoundParametersListdialogboxandbindthecontroltotheparameter(s).

BackgroundColorSpecifiesthebackgroundcoloroftheoperatorinterface.

ForegroundColorSpecifiestheforegroundcoloroftheoperatorinterface.

NameSpecifiesthenameoftheoperatorinterface.Thenameappearsonthetitlebaroftheoperatorinterface.

KnobPropertiesYoucanusethefollowingpropertiestoconfigureKnobcontrolsonanoperatorinterface.

Property DescriptionBackgroundColor

Specifiesthecolortouseforthebackgroundofthecontrol.Details

Border Specifiesthetypeofbordertouseforthecontrol.DetailsBoundParameters

Specifiesthestepparametersthatareboundtothecontrol.ClickthebuttonthatappearswhenyouselectthevalueofthispropertytodisplaytheBoundParametersListdialogbox.Details

CoercionInterval

Specifiestheintervaltousetocoercethevalueofthecontrol.Details

CoercionMode

Specifiesthemodetousetocoercethevalueofthecontrol.Details

DialColor Specifiesthecolortouseforthedialofaknobcontrol.Details

ForegroundColor

Specifiesthecolortousefortheforegroundofthecontrol.Details

InitialValue Specifiestheinitialvalueofthecontrol.DetailsInteractionMode

Specifiesthetypesofinteractionstheusercanhavewiththecontrolwhenyouruntheprojectinoperatormode.Details

KnobStyle Specifiesthestyleoftheknobcontrol.DetailsPointerColor

Specifiesthecolortouseforthepointerofthecontrol.Details

Range Specifiestheminimumandmaximumvaluesofthecontrol.Details

Range:Maximum

Specifiesthemaximumvalueofthecontrol.Details

Range:Minimum

Specifiestheminimumvalueofthecontrol.Details

ScaleArc Specifiesthearconwhichthescaleisdrawn.Details

ScaleBaseLineColor

Specifiesthecolorofthelinethatconnectsthetickmarksonthescale.YoumustsettheScaleBaseLineVisiblepropertytoTrueforthebaselinetoappear.Details

ScaleBaseLineVisible

Specifieswhetherthelinethatconnectsthetickmarksonthescaleisvisible.Details

ScaleType Specifiesthetypeofthescale.DetailsScaleVisible

Specifieswhetherthescaleofthecontrolisvisible.Details

BackgroundColor[Controltypes:Knob,Numeric,Slide,Switch,Ring,Text,Label]Specifiesthecolortouseforthebackgroundofthecontrol.

Border[Controltypes:Knob,Slide,Switch]Specifiesthetypeofbordertouseforthecontrol.

BoundParameters[Controltypes:Knob,Numeric,Slide,Switch]Specifiesthestepparametersthatareboundtothecontrol.ClickthebuttonthatappearswhenyouselectthevalueofthispropertytodisplaytheBoundParametersListdialogbox.

CoercionInterval[Controltypes:Knob,Numeric,Slide]Specifiestheintervaltousetocoercethevalueofthecontrol.

CoercionMode[Controltypes:Knob,Numeric,Slide]Specifiesthemodetousetocoercethevalueofthecontrol.

DialColor[Controltypes:Knob]Specifiesthecolortouseforthedialofaknobcontrol.

ForegroundColor[Controltypes:Knob,Numeric,Slide,Switch,Ring,Text,Label]Specifiesthecolortousefortheforegroundofthecontrol.

InitialValue[Controltypes:Knob,Numeric,Slide]Specifiestheinitialvalueofthecontrol.

InteractionMode[Controltypes:Knob,Numeric,Slide,Switch]Specifiesthetypesofinteractionstheusercanhavewiththecontrolwhenyouruntheprojectinoperatormode.

KnobStyle[Controltypes:Knob]Specifiesthestyleoftheknobcontrol.

PointerColor[Controltypes:Knob,Slide]Specifiesthecolortouseforthepointerofthecontrol.

Range[Controltypes:Knob,Numeric,Slide]Specifiestheminimumandmaximumvaluesofthecontrol.

Range:Maximum[Controltypes:Knob,Numeric,Slide]Specifiesthemaximumvalueofthecontrol.

Range:Minimum[Controltypes:Knob,Numeric,Slide]Specifiestheminimumvalueofthecontrol.

ScaleArc[Controltypes:Knob]Specifiesthearconwhichthescaleisdrawn.

ScaleBaseLineColor[Controltypes:Knob,Slide]Specifiesthecolorofthelinethatconnectsthetickmarksonthescale.YoumustsettheScaleBaseLineVisiblepropertytoTrueforthebaselinetoappear.

ScaleBaseLineVisible[Controltypes:Knob,Slide]Specifieswhetherthelinethatconnectsthetickmarksonthescaleisvisible.

ScaleType[Controltypes:Knob,Slide]Specifiesthetypeofthescale.

ScaleVisible[Controltypes:Knob,Slide]Specifieswhetherthescaleofthecontrolisvisible.

LabelPropertiesYoucanusethefollowingpropertiestoconfigureLabelcontrolsonanoperatorinterface.

Property DescriptionBackgroundColor

Specifiesthecolortouseforthebackgroundofthecontrol.Details

BorderStyle Specifiesthestyleoftheborderofthecontrol.DetailsFont Specifiesthefonttouseforthetextinthe

control.DetailsFont:Bold Specifieswhetherthetextinthecontrolappears

bolded.DetailsFont:GdiCharSet

SpecifiestheGDI(GraphicsDeviceInterface)charactersetthatthefontofthetextinthecontroluses.Details

Font:GdiVerticalFont

SpecifieswhetherthefontofthetextinthecontrolisderivedfromaGDI(GraphicsDeviceInterface)verticalfont.Details

Font:Italic Specifieswhetherthetextinthecontrolappearsitalicized.Details

Font:Name Specifiesthenameofthefonttouseforthetextinthecontrol.Details

Font:Size Specifiesthesizeofthefonttouseinthecontrol.Details

Font:Strikeout Specifieswhetherahorizontallineappearsthroughthetextinthecontrol.Details

Font:Underline Specifieswhetherthetextinthecontrolappearsunderlined.Details

Font:Unit Specifiestheunitofmeasureforthesizeofthefontyouuseinthecontrol.Details

ForegroundColor

Specifiesthecolortousefortheforegroundofthecontrol.Details

Text Specifiesthetextthatappearsinthecontrol.Details

BorderStyle[Controltypes:Numeric,Ring,Text,Label]Specifiesthestyleoftheborderofthecontrol.

Font[Controltypes:Text,Label]Specifiesthefonttouseforthetextinthecontrol.

Font:Bold[Controltypes:Text,Label]Specifieswhetherthetextinthecontrolappearsbolded.

Font:GdiCharSet[Controltypes:Text,Label]SpecifiestheGDI(GraphicsDeviceInterface)charactersetthatthefontofthetextinthecontroluses.

Font:GdiVerticalFont[Controltypes:Text,Label]SpecifieswhetherthefontofthetextinthecontrolisderivedfromaGDI(GraphicsDeviceInterface)verticalfont.

Font:Italic[Controltypes:Text,Label]Specifieswhetherthetextinthecontrolappearsitalicized.

Font:Name[Controltypes:Text,Label]Specifiesthenameofthefonttouseforthetextinthecontrol.

Font:Size[Controltypes:Text,Label]Specifiesthesizeofthefonttouseinthecontrol.

Font:Strikeout[Controltypes:Text,Label]Specifieswhetherahorizontallineappearsthroughthetextinthecontrol.

Font:Underline[Controltypes:Text,Label]Specifieswhetherthetextinthecontrolappearsunderlined.

Font:Unit[Controltypes:Text,Label]Specifiestheunitofmeasureforthesizeofthefontyouuseinthecontrol.

Text[Controltypes:Ring,Text,Label]Specifiesthetextthatappearsinthecontrol.

NumericPropertiesYoucanusethefollowingpropertiestoconfigureNumericcontrolsonanoperatorinterface.

Property DescriptionBackgroundColor

Specifiesthecolortouseforthebackgroundofthecontrol.Details

BorderStyle

Specifiesthestyleoftheborderofthecontrol.Details

BoundParameters

Specifiesthestepparametersthatareboundtothecontrol.ClickthebuttonthatappearswhenyouselectthevalueofthispropertytodisplaytheBoundParametersListdialogbox.Details

CoercionInterval

Specifiestheintervaltousetocoercethevalueofthecontrol.Details

CoercionMode

Specifiesthemodetousetocoercethevalueofthecontrol.Details

ForegroundColor

Specifiesthecolortousefortheforegroundofthecontrol.Details

FormatMode

Specifiesthenumericformattouseforthevalueofthecontrol.Details

InitialValue Specifiestheinitialvalueofthecontrol.DetailsInteractionMode

Specifiesthetypesofinteractionstheusercanhavewiththecontrolwhenyouruntheprojectinoperatormode.Details

Range Specifiestheminimumandmaximumvaluesofthecontrol.Details

Range:Maximum

Specifiesthemaximumvalueofthecontrol.Details

Range:Minimum

Specifiestheminimumvalueofthecontrol.Details

TextAlignment

Specifiesthealignmentoftextwithinanumericcontrol.Details

Up/Down Specifiesthealignmentoftheupanddownarrowsinthe

Alignment controlrelativetothetextbox.Details

FormatMode[Controltypes:Numeric]Specifiesthenumericformattouseforthevalueofthecontrol.

TextAlignment[Controltypes:Numeric]Specifiesthealignmentoftextwithinanumericcontrol.

Up/DownAlignment[Controltypes:Numeric]Specifiesthealignmentoftheupanddownarrowsinthecontrolrelativetothetextbox.

RingPropertiesYoucanusethefollowingpropertiestoconfigureRingcontrolsonanoperatorinterface.

Property DescriptionBackgroundColor

Specifiesthecolortouseforthebackgroundofthecontrol.Details

BoundParameter

Specifiesthestepparametersthatareboundtothecontrol.ClickthebuttonthatappearswhenyouselectthevalueofthispropertytodisplaytheBoundParametersListdialogbox.Details

ForegroundColor

Specifiesthecolortousefortheforegroundofthecontrol.Details

BoundParameter[Controltypes:Ring]Specifiesthestepparameterthatisboundtothecontrol.ClickthebuttonthatappearswhenyouselectthevalueofthispropertytodisplaytheBoundParametersListdialogbox.

SlidePropertiesYoucanusethefollowingpropertiestoconfigureSlidecontrolsonanoperatorinterface.

Property DescriptionBackgroundColor

Specifiesthecolortouseforthebackgroundofthecontrol.Details

Border Specifiesthetypeofbordertouseforthecontrol.DetailsBoundParameters

Specifiesthestepparametersthatareboundtothecontrol.ClickthebuttonthatappearswhenyouselectthevalueofthispropertytodisplaytheBoundParametersListdialogbox.Details

CoercionInterval

Specifiestheintervaltousetocoercethevalueofthecontrol.Details

CoercionMode

Specifiesthemodetousetocoercethevalueofthecontrol.Details

FillBackgroundColor

Specifiesthecoloroftheunfilledportionofthefillareaofaslidecontrol.Details

FillBaseValue

Specifiesthevalueatwhichthefillbegins.YoumustspecifyabasevalueifyousettheFillModepropertytoToBaseValue.Details

FillColor Specifiesthecolorofthefilledportionofthefillareaofaslidecontrol.Details

ForegroundColor

Specifiesthecolortousefortheforegroundofthecontrol.Details

InitialValue Specifiestheinitialvalueofthecontrol.DetailsInteractionMode

Specifiesthetypesofinteractionstheusercanhavewiththecontrolwhenyouruntheprojectinoperatormode.Details

InvertedScale

Specifieswhethertoinvertthescaleofthecontrol.Details

Range Specifiestheminimumandmaximumvaluesofthecontrol.Details

Range:Maximum

Specifiesthemaximumvalueofthecontrol.Details

Range:Minimum

Specifiestheminimumvalueofthecontrol.Details

ScaleBaseLineColor

Specifiesthecolorofthelinethatconnectsthetickmarksonthescale.YoumustsettheScaleBaseLineVisiblepropertytoTrueforthebaselinetoappear.Details

ScaleBaseLineVisible

Specifieswhetherthelinethatconnectsthetickmarksonthescaleisvisible.Details

ScaleType Specifiesthetypeofthescale.DetailsScaleVisible

Specifieswhetherthescaleofthecontrolisvisible.Details

SlideStyle Specifiesthestyleoftheslidecontrol.Details

FillBackgroundColor[Controltypes:Slide]Specifiesthecoloroftheunfilledportionofthefillareaofaslidecontrol.

FillBaseValue[Controltypes:Slide]Specifiesthevalueatwhichthefillbegins.YoumustspecifyabasevalueifyousettheFillModepropertytoToBaseValue.

FillColor[Controltypes:Slide]Specifiesthecolorofthefilledportionofthefillareaofaslidecontrol.

FillMode[Controltypes:Slide]Specifiesthedirectioninwhichthecontrolfills.Controlsfillfromtheminimumvaluetotheslidervaluebydefault.

FillStyle[Controltypes:Slide]Specifiesthestyletousetodrawthefillcolor.

InvertedScale[Controltypes:Slide]Specifieswhethertoinvertthescaleofthecontrol.

SlideStyle[Controltypes:Slide]Specifiesthestyleoftheslidecontrol.

SwitchPropertiesYoucanusethefollowingpropertiestoconfigureSwitchcontrolsonanoperatorinterface.

Property DescriptionBackgroundColor

Specifiesthecolortouseforthebackgroundofthecontrol.Details

BoundParameters

Specifiesthestepparametersthatareboundtothecontrol.ClickthebuttonthatappearswhenyouselectthevalueofthispropertytodisplaytheBoundParametersListdialogbox.Details

ForegroundColor

Specifiesthecolortousefortheforegroundofthecontrol.Details

InitialValue Specifiestheinitialvalueofthecontrol.DetailsInteractionMode

Specifiesthetypesofinteractionstheusercanhavewiththecontrolwhenyouruntheprojectinoperatormode.Details

OffColor SpecifiesthecolorofaswitchcontrolwhentheswitchisintheofforFALSEposition.Details

OnColor SpecifiesthecolorofaswitchcontrolwhentheswitchisintheonorTRUEposition.Details

SwitchStyle

Specifiesthestyleofaswitchcontrol.Details

OffColor[Controltypes:Switch]SpecifiesthecolorofaswitchcontrolwhentheswitchisintheofforFALSEposition.

OnColor[Controltypes:Switch]SpecifiesthecolorofaswitchcontrolwhentheswitchisintheonorTRUEposition.

SwitchStyle[Controltypes:Switch]Specifiesthestyleofaswitchcontrol.

TextPropertiesYoucanusethefollowingpropertiestoconfigureTextcontrolsonanoperatorinterface.

Property DescriptionBackgroundColor

Specifiesthecolortouseforthebackgroundofthecontrol.Details

BorderStyle Specifiesthestyleoftheborderofthecontrol.DetailsFont Specifiesthefonttouseforthetextinthe

control.DetailsFont:Bold Specifieswhetherthetextinthecontrolappears

bolded.DetailsFont:GdiCharSet

SpecifiestheGDI(GraphicsDeviceInterface)charactersetthatthefontofthetextinthecontroluses.Details

Font:GdiVerticalFont

SpecifieswhetherthefontofthetextinthecontrolisderivedfromaGDI(GraphicsDeviceInterface)verticalfont.Details

Font:Italic Specifieswhetherthetextinthecontrolappearsitalicized.Details

Font:Name Specifiesthenameofthefonttouseforthetextinthecontrol.Details

Font:Size Specifiesthesizeofthefonttouseinthecontrol.Details

Font:Strikeout Specifieswhetherahorizontallineappearsthroughthetextinthecontrol.Details

Font:Underline Specifieswhetherthetextinthecontrolappearsunderlined.Details

Font:Unit Specifiestheunitofmeasureforthesizeofthefontyouuseinthecontrol.Details

ForegroundColor

Specifiesthecolortousefortheforegroundofthecontrol.Details

ReadOnly Specifieswhetheryoucaneditthetextthatappearsinthecontrol.Details

Text Specifiesthetextthatappearsinthecontrol.Details

ReadOnly[Controltypes:Text]Specifieswhetheryoucaneditthetextthatappearsinthecontrol.

PerformingCommonTasksinLabVIEWSignalExpressThisbookcontainsexampleproceduresthatguideyouthroughsomecommontasksinLabVIEWSignalExpress.TheexamplesinthisbookassumeyouhaveNI-DAQmxinstalled,andthatyouhaveconfiguredaninstalledorsimulatedNI-DAQmxdevice.

NoteYoucaninstallNI-DAQmxsoftwarefromtheNationalInstrumentsDeviceDriverDVD,oryoucandownloadthelatestversionofNI-DAQmxsoftwarefromni.com/downloads.

Thisbookincludesthefollowingexamples:Acquiring,Logging,andAnalyzingaTemperatureSignal

Acquiring,Logging,andAnalyzingaTemperatureSignalTheexamplesinthisbookdescribehowtoacquire,log,andanalyzeatemperaturesignalfromanNI-DAQmxdevice.Theexamplesbuildoneachother,soyoumuststartwiththefirstexampleinordertobuildtheprojectcorrectly.TheexamplesinthisbookassumeyouhaveNI-DAQmxinstalled,andthatyouhaveconfiguredaninstalledorsimulatedNI-DAQmxdevice.

NoteYoucaninstallNI-DAQmxsoftwarefromtheNationalInstrumentsDeviceDriverDVD,oryoucandownloadthelatestversionofNI-DAQmxsoftwarefromni.com/downloads.

Whiletheexamplesinthisbookarespecifictoacquiringatemperaturesignal,youcanapplytheconceptsfromtheseprocedurestoanysignalyouacquire,log,and/oranalyzeinLabVIEWSignalExpress.Thisbookcontainsthefollowingexampleprocedures:

Example1:LoggingaTemperatureSignalExample2:LoggingaTemperatureSignalwithStartandStopConditionsExample3:DisplayingAlarmswhenaTemperatureSignalMeetsaSpecifiedValueExample4:AnalyzingaLoggedTemperatureSignal

Example1:LoggingaTemperatureSignalYoucanuseLabVIEWSignalExpresstologsignalsyouacquirefromvariousdevicesandinstruments.ThefollowingproceduredescribeshowtologatemperaturesignalfromanNI-DAQmxdevice.Thisexampleassumesyouhaveathermocoupletemperaturesensorconnectedtophysicalchannelai0ofanNI-DAQmxdevice.

NoteYoucaninstallNI-DAQmxsoftwarefromtheNationalInstrumentsDeviceDriverDVD,oryoucandownloadthelatestversionofNI-DAQmxsoftwarefromni.com/downloads.

CompletethefollowingstepstouseLabVIEWSignalExpresstoacquireatemperaturesignalfromthedevice:

1. LaunchLabVIEWSignalExpressandselectFile»NewProjecttoopenanewLabVIEWSignalExpressproject.

2. SelectAddStep»AcquireSignals»DAQmxAcquire»AnalogInput»Temperature»ThermocoupletoaddtheDAQmxAcquiresteptotheProjectView.TheAddChannelsToTaskdialogboxappears.

3. IntheAddChannelsToTaskdialogbox,selectai0underDev1(DeviceName)andclicktheOKbutton.TheStepSetuptabupdatestodisplayDev1_ai0inthelistofchannels,andThermocoupleSetupconfigurationoptionsappeartotherightofthelistofchannels.

4. UsetheThermocoupleSetupoptionstoconfigurethestep.SelecttheThermocoupleTypeyouareusing,andselectdegFfromtheScaledUnitspull-downmenutospecifytomeasurethetemperatureindegreesFahrenheit.

5. Afteryouconfigurethestep,clicktheRecordtoolbarbutton.TheLoggingSignalsSelectiondialogboxappears.

6. IntheLoggingSignalsSelectiondialogbox,expandThermocoupleintheSignalstoincludetreeandplaceacheckmarkintheDev1_ai0checkbox.

7. ClicktheOKbuttontoclosethedialogboxandbeginrecordingthesignal.AnewlogappearsintheLoggedDatawindow.

8. SwitchtotheDataViewtabanddragthelogfromtheLoggedDatawindowtotheDataViewtabtoviewtheprogressofthe

log.NoteYoualsocandragtheThermocoupleoutputoftheDAQmxAcquiresteptotheDataViewtabtodisplaythecurrentvalueofthesignal.

9. ClicktheRecordortheStopbuttontostoploggingthesignal.10. SelectFile»SaveProjecttosavetheproject.NoteWhenyousaveaprojectthatcontainslogs,LabVIEWSignalExpresssavesthelogswiththeproject.LabVIEWSignalExpressalsosaveslogfilesinthe.tdmsfileformattoalocationyouspecifyontheLoggingpageoftheOptionsdialogbox.

Thisexampledescribeshowtostartandstoploggingbyclickingabutton.However,youmightwanttostartandstoploggingbasedonwhenasignalmeetscertainconditions.Example2:LoggingaTemperatureSignalwithStartandStopConditionsdescribeshowtoconfigureloggingwithstartandstopconditionsinLabVIEWSignalExpress.

Example2:LoggingaTemperatureSignalwithStartandStopConditionsThefollowingproceduredescribeshowtologatemperaturesignalfromanNI-DAQmxdevice.ThisexampleusestheprojectyoucreatedinExample1:LoggingaTemperatureSignal.CompletethefollowingstepstoconfigureLabVIEWSignalExpresstobeginloggingthetemperaturesignalwhenthesignalrisesabove75degreesFahrenheitandtostoploggingthesignalwhenthesignalfallsbackbelow75degreesFahrenheit.

1. OpentheprojectyousavedinExample1:LoggingaTemperatureSignal.

2. SelectView»RecordingOptionstodisplaytheRecordingOptionstab.TheCategorylistdisplaysthepagesofthetabyoucanusetoconfigureloggingoperations.TheSignalSelectionpageisselectedbydefaultbecauseyoumustselectasignaltologbeforeyoucanconfigurelogging.

3. TheSignalselectionlistontheSignalSelectionpagedisplaysthesignalsintheprojectthatyoucanlog.IntheChannelNamecolumn,expandThermocoupleandplaceacheckmarkintheRecordcheckboxforchannelDev1/ai0.TheRecordWhileRunningbuttonreplacestheRecordbuttoninthetoolbar.

4. IntheCategorylist,selectStartConditionstodisplaytheStartConditionspage.

5. ClicktheAddbuttontoaddanewstartconditiontotheStartconditionlistanddisplayadditionalconfigurationoptions.

6. VerifythatSignaltriggerappearsintheConditiontypepull-downmenu,Thermocouple-Dev1_ai0appearsintheSignalpull-downmenu,andRisingslopeappearsintheTriggertypepull-downmenu.

7. Enter75intheTriggervaluefieldtospecifyforloggingtostartwhenthesignalfromthethermocouplecrosses75witharisingslope,orexceeds75degreesFahrenheit.

8. IntheCategorylist,selectStopConditionstodisplaytheStopConditionspage.

9. ClicktheAddbuttontoaddanewstopconditiontotheStop

conditionlistanddisplayadditionalconfigurationoptions.10. SelectSignaltriggerfromtheConditiontypepull-downmenu.11. VerifythatThermocouple-Dev1_ai0appearsintheSignalpull-

downmenuandselectFallingslopefromtheTriggertypepull-downmenu.

12. Enter75intheTriggervaluefieldtospecifyforloggingtostopwhenthesignalfromthethermocouplecrosses75withafallingslope,orfallsbelow75degreesFahrenheit.

13. SwitchtotheDataViewtabandclicktheRunbuttontoruntheprojectcontinuously.ThestatusindicatorbelowtheProjectViewdisplaysWaitingforstartconditionsuntilLabVIEWSignalExpressdetectsthatthetemperaturesignalisabove75degreesFahrenheit.

14. Afterthestartconditionismet,thestatusindicatorupdatestodisplayRecording.IftheloggedsignaldoesnotappearontheDataViewtab,dragthesignalfromtheLoggedDatawindowtotheDataViewtabtoviewtheprogressofthelog.

15. TheprojectrunsandLabVIEWSignalExpresslogsthesignaluntilthetemperaturefallsbelow75degreesFahrenheitandthestopconditionismet.Afterthestopconditionismet,LabVIEWSignalExpressstopsrecordingthesignalandstopsrunningtheproject.SelectFile»SaveProjecttosavetheproject.

Inadditiontostartandstopconditions,youcanusetheRecordingOptionstabtoconfigureLabVIEWSignalExpresstorecordalarmsandeventsthatoccurduringlogging.Example3:DisplayingAlarmswhenaTemperatureSignalMeetsaSpecifiedValuedescribeshowtoconfigurealarmsinLabVIEWSignalExpress.

Example3:DisplayingAlarmswhenaTemperatureSignalMeetsaSpecifiedValueThefollowingproceduredescribeshowtodisplayanalarmwhenatemperaturesignalyouareloggingexceedsatemperatureyouspecify.ThisexampleusestheprojectyoucreatedinExample1:LoggingaTemperatureSignalandmodifiedinExample2:LoggingaTemperatureSignalwithStartandStopConditions.CompletethefollowingstepstoconfigureLabVIEWSignalExpresstodisplayanalarmwhenthetemperaturesignalrisesabove85degreesFahrenheit.

1. OpentheprojectyousavedinExample2:LoggingaTemperatureSignalwithStartandStopConditions.

2. SelectView»RecordingOptionstodisplaytheRecordingOptionstab.

3. IntheCategorylist,selectAlarmstodisplaytheAlarmspage.4. ClicktheAddbuttontoaddanewalarmtotheAlarmlistand

displayadditionalconfigurationoptions.5. VerifythatThermocouple-Dev1_ai0appearsintheSignalpull-

downmenuandAboveappearsintheConditionpull-downmenu.

6. Enter85intheValuefieldtospecifythatLabVIEWSignalExpressdisplaysanalarmwhenthesignalfromthethermocouplerisesabove85degreesFahrenheit.

7. SwitchtotheDataViewtabandclicktheRunbuttontoruntheprojectcontinuously.ThestatusindicatorbelowtheProjectViewdisplaysWaitingforstartconditionsuntilLabVIEWSignalExpressdetectsthestartconditionyouconfiguredinExample2:LoggingaTemperatureSignalwithStartandStopConditions.

8. Afterthestartconditionismet,thestatusindicatorupdatestodisplayRecording.IftheloggedsignaldoesnotappearontheDataViewtab,dragthesignalfromtheLoggedDatawindowtotheDataViewtabtoviewtheprogressofthelog.

9. Whenthetemperaturesignalexceeds85degreesFahrenheit,aredalarmindicatorappearsonthegraphofthelog.Thealarm

remainsactiveuntilthetemperaturefallsbelow85degrees.10. TheprojectrunsandLabVIEWSignalExpresslogsthesignal

untilthestopconditionismet.Afterthestopconditionismet,expandthelogintheLoggedDatawindow,right-clickThermocouple,andselectShowAlarmsandEventsfromtheshortcutmenutodisplayadialogboxthatlistthealarmsandeventsthatoccurredduringtheloggingoperation.YoucanclicktheExportbuttononthisdialogboxtosavethelisttoatextfile.

11. ClicktheOKbuttontoclosethedialogboxandselectFile»SaveProjecttosavetheproject.

Thisexampleandthetwothatprecedeitdescribedifferentwaystoconfigureloggingoperations.Afteraloggingoperationiscomplete,youcanuseLabVIEWSignalExpresstoviewandanalyzetheloggedsignal.Example4:AnalyzingaLoggedTemperatureSignaldescribeshowtoanalyzetheloggedtemperaturesignalinLabVIEWSignalExpress.

Example4:AnalyzingaLoggedTemperatureSignalThefollowingproceduredescribeshowtoanalyzealoggedtemperaturesignaltodeterminethemaximum,minimum,andmeanvaluesofthesignal.ThisexampleusestheprojectyoucreatedinExample1:LoggingaTemperatureSignalandmodifiedinExample2:LoggingaTemperatureSignalwithStartandStopConditionsandExample3:DisplayingAlarmswhenaTemperatureSignalMeetsaSpecifiedValue.Completethefollowingstepstoanalyzetheloggedtemperaturesignalanddeterminethemaximum,minimum,andmeanvaluesofthesignal.

1. OpentheprojectyousavedinExample3:DisplayingAlarmswhenaTemperatureSignalMeetsaSpecifiedValue.

2. Intheworkareaspull-downmenuthatappearsabovetheProjectView,selectPlaybacktoswitchtoaPlaybackworkarea.ThePlaybackworkareaissimilartotheMonitor/RecordworkareainwhichyouloggedthesignalexceptthattheDataViewtabappearswithatimebarandvariousbuttonsyoucanusetonavigatealoggedsignal.YoualsocanuseloggedsignalsasstepinputsinaPlaybackworkarea.

3. IntheLoggedDatawindow,right-clickthelastlogyoucreatedandselectMakeActiveLogfromtheshortcutmenu.Thenameoftheactivelogappearsinbold.

4. DragthelogfromtheLoggedDatawindowtotheDataViewtab.5. ClicktheRunbuttontoplaybackthelog.Youalsocandragthe

sliderinthetimebartonavigatethelog,oryoucanusethebuttonsandthepull-downmenuonthetimebartoadjusthowLabVIEWSignalExpressplaysbacktheloggedsignal.Forexample,youcanadjusttheplaybackspeed.

6. SelectAddStep»Analysis»Time-DomainMeasurements»StatisticstoaddtheStatisticssteptotheProjectView.TheStepSetuptabfortheStatisticsstepappears,andLabVIEWSignalExpressselectstheloggedsignalasthestepinputsignalautomatically.

7. OntheConfigurationAndResultspageoftheStepSetuptab,placecheckmarksintheMax,Min,andMeancheckboxestospecifythatthestepreturnsthemaximum,minimum,andmean

valuesofthetemperaturesignalasoutputs.8. DragthenewstepoutputstotheDataViewtabandclickthe

Runbuttontoruntheprojectanddisplaythemaximum,minimum,andmeanvaluesofthetemperaturesignalontheDataViewtab.

9. SelectFile»SaveProjecttosavetheproject.

BuildingVIsforRunLabVIEWVIStepsYoucanbuildaRunLabVIEWVIstepfromanexistingVIoryoucanstartfromatemplate.

BuildingRunLabVIEWVIStepsfromExistingVIsYoucancallmostVIsfromLabVIEWSignalExpress.CompletethefollowingstepstobuildaVIyoucanuseinaRunLabVIEWVIstep.

NoteYoumustuseLabVIEW7.1orlatertocreateaVIyoucanrunfromtheRunLabVIEWVIstep.YoucannotrunaVIthatwassavedforapreviousversionofLabVIEWusingtheRunLabVIEWVIstep.YoumustsavetheVIintheactualversionofLabVIEWyouwanttorun.

1. OpenanexistingVItouseasaRunLabVIEWVIstep.YoualsocanuseatemplatetobuildaRunLabVIEWVIstep.

2. ConnectallinputsandoutputsnecessaryfortheoperationoftheVItotheconnectorpaneoftheVI.WhenyoucallaVIfromLabVIEWSignalExpress,itreadstheconnectorpaneoftheVItodeterminetheinputsandoutputs.Ifyoudonotwiretheinputsandoutputstotheconnectorpane,LabVIEWSignalExpresscannotpassdataintooroutoftheVI.ConnectingtheinputsandoutputstotheconnectorpanealsoenablesLabVIEWSignalExpresstoproperlyconvertaLabVIEWSignalExpressprojecttoaLabVIEWblockdiagram.MakesureLabVIEWSignalExpresssupportsthedatatypesofthecontrolsandindicators.

3. SelectFile»VIProperties,selectExecutionfromtheCategorypull-downmenu,andplaceacheckmarkintheReentrantexecutioncheckbox.ReentrantVIscreateauniquedataspaceforeachinstanceofaVIwhenitiscalled.BecauseyoucanuseasingleVImultipletimesinaLabVIEWSignalExpressproject,youmustsavetheVIasreentranttoavoiddataspaceclashing.

4. LabVIEW7.1:SavetheVIasanLLBwithallofitssubVIsincludedbyselectingFile»SavewithOptionsandclickingtheApplicationDistributionoptioninLabVIEW.WhenyoucombineallsubVIsintoanLLB,youensurethatallofthecomponentsnecessarytoexecutetheVIarepresentonthesystem.RefertotheLabVIEWHelpformoreinformationaboutcreatinglinked

librariesinLabVIEW.

LabVIEW8.0:SavetheVIasansourcedistributionwithallofitssubVIsincludedbycreatinganewprojectlibrarywhichincludestheVIs.Right-clicktheBuildSpecificationsoptionintheProjectExplorerwindowandselectNew»SourceDistribution.IntheSourceDistributionPropertiesdialogbox,removethecheckmarksfromtheExcludevi.lib,Excludeinstr.lib,andExcludeuser.liboptions.ClicktheBuildbuttontobuildthesourcedistribution.RefertotheLabVIEWHelpformoreinformationaboutcreatingprojectlibrariesandsourcedistributionsinLabVIEW.

LabVIEW8.2andlater:SavetheVIasansourcedistributionwithallofitssubVIsincludedbycreatinganewprojectlibrarywhichincludestheVIs.Right-clicktheBuildSpecificationsoptionintheProjectExplorerwindowandselectNew»SourceDistribution.OntheAdditionalExclusionspageoftheSourceDistributionPropertiesdialogbox,removethecheckmarksfromtheExcludefilesfromvi.lib,Excludefilesfrominstr.lib,andExcludefilesfromuser.liboptions.ClicktheBuildbuttontobuildthesourcedistribution.RefertotheLabVIEWHelpformoreinformationaboutcreatingprojectlibrariesandsourcedistributionsinLabVIEW.

5. Beforeyouusethenewlycreatedlinkedlibrary,closethelibraryandLabVIEWtoensuretheVIdoesnotremaininthesystemmemory.

NoteAnytimeaRunLabVIEWVIstepusesadynamiclinklibrary(DLL),youmustmaintainthepathtotheDLL.IfyoumovetheDLLorputthefilesonadifferentcomputer,youmustopentheRunLabVIEWVIstepinLabVIEWandrelinktheVItotheDLL.

BuildingRunLabVIEWVIStepsfromaTemplateNoteYoumustuseLabVIEW7.1orlatertocreateaVIyoucanrunfromtheRunLabVIEWVIstep.YoucannotrunaVIthatwassavedforapreviousversionofLabVIEWusingtheRunLabVIEWVIstep.YoumustsavetheVIintheactualversionofLabVIEWyouwanttorun.

TheLabVIEWSignalExpressstepshavefourexecutionstates.InLabVIEW,openUserDefinedStepTemplate.viintheSignalExpress\UserStepTemplatesdirectory.TheUserDefinedStepTemplateVIcontainsaCasestructurewithfourcases.Eachcaserepresentsoneofthefourexecutionstates.Thefollowinglistdescribeseachcase:

Configure—ExecutesonceasthefirstcaseeachtimeyouclicktheRunbuttoninLabVIEWSignalExpress.Reconfigure—ExecuteswhenyouchangeparametervaluesonaRunLabVIEWVIstepwhiletheprojectisrunning.Run—ExecutesrepeatedlyoronceaftertheConfigurecaseexecutes,dependingontherunmodeyouusetoruntheproject.Placeindicatorsfordatayouacquireinthiscase.Stop—ExecutesonceafteryouclicktheStopbuttonorselecttheAbortoptioninLabVIEWSignalExpress.

NoteThe_EventenumeratedtypecontrolonthefrontpanelofthetemplateVIisconnectedtotheconnectorpaneandwiredtotheselectorterminaloftheCasestructureontheblockdiagram.RemovingorrenamingthiscontrolbreaksthetemplateVI.

Ifyouneedtosharedatabetweenexecutioncases,useashiftregisterontheWhileLoopthatsurroundstheCasestructure.NoticethataBooleanconstantwiredtotheWhileLoopconditionnodeissettoTRUE.ThisforcescodeintheWhileLooptoexecuteonceeverytimeLabVIEWSignalExpresscallstheRunLabVIEWVIstep.YouonlyneedtouseaWhileLoopifyouuseshiftregisterstosharedatabetweenexecutioncases.

CallingLabVIEWVIsfromLabVIEWSignalExpressCompletethefollowingstepstouseaVIinLabVIEWSignalExpress.

1. ClicktheAddStepbuttonandselecttheRunLabVIEWVIstepfortheversionofLabVIEWinwhichyousavedyourVI.

2. ClickthebrowsebuttonnexttotheSelectVIfieldandnavigatetotheVIyouwanttouseintheLabVIEWSignalExpressproject.

3. ClicktheConnectInputbuttonandselectwhichinputontheVIyouwanttousetopassinasignalfromanotherstepintheproject.LabVIEWSignalExpressreadstheconnectorpaneoftheVItodeterminetheinputstolistintheConnectInputdialogbox.

4. IntheInputsignaldrop-downlist,selectasignalfromapreviousstepyouwanttopassintotheVI.Thisdrop-downlistdisplayssignalsforstepsthatexecutebeforetheRunLabVIEWVIstep.

5. TheRunLabVIEWVIstepreadstheconnectorpaneoftheVIandliststheoutputsintheOutputslist.Foreachoutputsignal,LabVIEWSignalExpressselectstheappropriatesignaltypesootherstepsintheprojectcanusethesignalscorrectly.

AfteryouspecifytheinputandoutputsignalsoftheRunLabVIEWVIstep,youcanrunthesteplikeanyotherstepwithinLabVIEWSignalExpressprojects.YoucanviewthefrontpaneloftheVIandchangetheparametersofthestepwhileitisrunning.

NoteVIsyouuseinyourRunLabVIEWVIstepmustbereentrantandmustbeinLLBsordevelopmentdistributions.

ConvertingaProjecttoaLabVIEWBlockDiagramYoucanuseLabVIEWSignalExpresstobuildautomatedmeasurementprojectsthatgeneratestimulusandacquireresponsesignals,analyzeanddisplaysignals,andsavethesignals.AfteryoucreateandsaveaprojectinLabVIEWSignalExpress,youcanconvertthatprojecttoaLabVIEWblockdiagram.ConvertingaLabVIEWSignalExpressprojectintoaLabVIEWblockdiagramhasthefollowingbenefits:

LabVIEWcompilesandexecutesblockdiagramsfasterthanLabVIEWSignalExpressprojects.YoucanexecuteLabVIEWblockdiagramsusingTestStandaspartofanautomatedtestsequence.YoucantakeadvantageofLabVIEWtoextendyourprojectsinthefollowingways:

Creatingacustomuserinterfacewithbuttons,knobs,andmeterstocontroltheexecutionanddisplayofyourmeasurements.ControllingothermeasurementhardwarenotsupportedbyLabVIEWSignalExpress,suchasGPIBinstruments,distributedI/Odevices,suchasFieldPoint,machinevisionboards,andmotioncontrollers.PerformingmoreadvancedanalysisroutinesusingtheLabVIEWanalysislibrariesoradd-ontoolkits.DistributingyourprojecttorunorbecontrolledfrommultiplecomputersoracrosstheWeb.

NoteToconvertaLabVIEWSignalExpressprojecttoaLabVIEWVI,youmusthavetheLabVIEW7.1FullDevelopmentSystemorlaterinstalled.

CompletethefollowingstepstoconvertaLabVIEWSignalExpressprojecttoaLabVIEWblockdiagram.

1. SelectTools»GenerateCode»LabVIEWDiagramtobegintheconversionprocess.

2. SpecifyanamefortheVIyouwanttogenerate,andclicktheOKbutton.

LabVIEWconvertstheactiveworkareaoftheLabVIEWSignalExpressprojecttoaLabVIEWVI.

NoteIfyouwanttoconvertastepthatcontainsaparametersettoperformasweepoperation,LabVIEWconvertsthatsteptoasubVI,notanExpressVI.LabVIEWconvertsotherstepswithinthesweepoperationtoExpressVIs.

WhenyouconvertaLabVIEWSignalExpressprojectwithlogging,LabVIEWSignalExpressgeneratesaLabVIEWblockdiagramwithoneExpressVI.YoucannotconvertthegeneratedExpressVIintoasubVI.Whenyoudouble-clicktheExpressVI,LabVIEWopenstheLabVIEWSignalExpressprojectassociatedwiththeExpressVI.RefertotheKnowledgeBaseformoreinformationabouttheExpressVI.

DistributingLabVIEWBlockDiagramsforExecutionLabVIEWrequirestheLabVIEWSignalExpressexecutionenginetorunLabVIEWSignalExpressstepsconvertedtotheLabVIEWblockdiagram.IfyoudistributetheconvertedVIforuseonothercomputers,makesurethetargetcomputerhasLabVIEWSignalExpressinstalled.IfthetargetcomputerdoesnothaveLabVIEWSignalExpressinstalled,youmustuseasourcedistributiontodistributetheconvertedVI.ThefollowingsectionscontainsguidelinesfordistributingVIs.

DistributingaVItoaComputerthatHasLabVIEWSignalExpressInstalledCopytheVItothetargetcomputer.YouthencanruntheExpressVI,opentheExpressVIandreconfigurethesettings,andconverttheExpressVItosubVIsifnecessary.YoumightneedtoupdatethedevicesettingsforanyhardwarestepsyouareusingtomakesuretheVIcanfindthehardwareonthetargetcomputercorrectly.

DistributingaVItoaComputerthatDoesNotHaveLabVIEWSignalExpressInstalledCompletethefollowingstepstodistributeaVItoacomputerthatdoesnothaveLabVIEWSignalExpressinstalled.

1. InLabVIEW,selectFile»NewProjecttocreateanewLabVIEWproject.

2. IntheProjectExplorerwindow,right-clickMyComputerandselectAdd»FilefromtheshortcutmenutoaddtheconvertedVItotheproject.

3. Savetheproject.4. Right-clickBuildSpecificationsandselectNew»Source

DistributionfromtheshortcutmenutodisplaytheSourceDistributionPropertiesdialogbox.

5. EnterthelocationforthesourcedistributionintheDestinationdirectorytextbox.YoucanusetheBrowsebuttontonavigatetoandselectalocation.

6. ClicktheBuildbuttonintheSourceDistributionPropertiesdialogboxtobuildthesourcedistribution.

NoteIfLabVIEWreturnsanerror,clicktheRemoveunusedmembersofprojectlibrariesoptionontheAdditionalExclusionspageoftheSourceDistributionPropertiesdialogboxandclicktheBuildbutton.

7. CopytheresultingfolderfromthedestinationdirectorytothetargetcomputerwhereyouwanttoruntheVI.

8. Copythelabview\vi.lib\express\SignalExpress\SupportfolderfromthecomputerthathasLabVIEWSignalExpressinstalledtothelabviewfolderonthetargetcomputer.

9. RuntheVIonthetargetcomputer.IfyoutrytoopentheExpressVIconfigurationviewtoreconfiguretheoperation,LabVIEWdisplaysanerrordialogboxthatindicatesthatyoudonothavetheLabVIEWSignalExpressexecutionengineinstalled.

NoteIfyouneedtomodifytheVI,converttheExpressVIintosubVIsandmodifythesubVIs.

RefertotheLabVIEWHelpformoreinformationaboutbuildingsource

distributionsinLabVIEW.

UsingExpressVIsinLabVIEWWhenyouconvertaLabVIEWSignalExpressprojecttoaLabVIEWblockdiagram,yourblockdiagramcontainsLabVIEWExpressVIswiredtogether.Typically,eachstepinLabVIEWSignalExpresscorrespondstoanExpressVIinyourLabVIEWblockdiagram.Whenyoudouble-clicktheseExpressVIs,LabVIEWdisplaysaconfigurationviewthatisidenticaltotheconfigurationviewforthecorrespondingstepinLabVIEWSignalExpress.YoucanreconfiguretheexecutionofyourVIinLabVIEWbyresettingvaluesintheconfigurationview.UnlikeLabVIEWSignalExpresswhereyoucanchangetheconfigurationviewoptionswhileLabVIEWSignalExpressexecutes,youcannotopentheExpressVIconfigurationviewandchangethesettingswhileLabVIEWexecutesyourVI.YoumuststoptheVI,opentheconfigurationview,makeachange,andreruntheVI.

NoteBecausetheLabVIEWSignalExpressexecutionenginemanagestheconfigurationviewsfortheExpressVIsrunninginLabVIEW,youmusthaveLabVIEWSignalExpressinstalledonthesamecomputerthatyouarerunningLabVIEWinorderfortheseExpressVIstofunctionproperly.IfyoudonothaveLabVIEWSignalExpressinstalledonthecomputer,youmustconverttheExpressVIsintosubVIsifyouwanttochangetheirconfigurations.

LikemostExpressVIs,youcanconvertLabVIEWSignalExpressExpressVIstoLabVIEWsubVIs.WhenyouconvertLabVIEWSignalExpressprojectsintoLabVIEWblockdiagrams,youmightneedtomodifythelow-levelVIsratherthanreconfigurethevaluesintheExpressVIs.ToconverttheExpressVIsintosubVIstoaccessthelow-levelVIs,right-clicktheExpressVI,selectOpenFrontPanel,andclicktheConvertbutton.

UsingtheLabVIEWSignalExpressExpressVIswithNativeLabVIEWExpressVIsYoucanbuildVIsusingtheLabVIEWSignalExpresspaletteinLabVIEW.TheseExpressVIsusetheLabVIEWwaveformdatatype,notthedynamicdatatypethenativeLabVIEWExpressVIsuse.Thedynamicdatatyperepresentsanarrayofwaveforms.Insomecases,LabVIEWcannotconverttheLabVIEWSignalExpressprojectintoExpressVIsbecausesomeExpressVIsmightnotsupportthefunctionalityyourprojectuses.ThefollowingexamplesdescribethefunctionalitynotsupportedbyExpressVIs:

Hardwaresynchronization—LabVIEWconvertsanyprojectthatusesthesynchronizationfeaturesofthemeasurementhardware,suchastriggersharing,clocksharing,andsoon,intosubVIsratherthanExpressVIs.ThemeasurementhardwareExpressVIsforNIdigitizers,arbitrarywaveformorfunctiongenerators,andmultifunctionDAQboardsdonotsupportthesesynchronizationfeatures.Inaddition,youcanpreservethedependencybetweenageneratorandameasurementdevicewhenperformingastimulusorresponsemeasurementinasinglesubVIthatcontainscodeforboththegeneratorandthemeasurementdevicetogether.Sweeping—LabVIEWconvertstheSweepstepintoaForLoopinLabVIEW.TheForLoopgeneratesnewvaluesforeachiterationandpassesthesevaluestotheVIsthatacceptthesevaluesasinputs.BecauseExpressVIscannotacceptnewvaluesonawireduringexecution,LabVIEWimplementssweepinginsubVIs.Logging—WhenyouconvertaLabVIEWSignalExpressprojectwithlogging,LabVIEWSignalExpressgeneratesaLabVIEWblockdiagramwithoneExpressVI.YoucannotconvertthegeneratedExpressVIintoasubVI.

RunningandModifyingConvertedProjectsinLabVIEWWhenyouconvertaLabVIEWSignalExpressprojecttoaLabVIEWblockdiagram,theresultingLabVIEWblockdiagramrepresentstheexactfunctionalityoftheLabVIEWSignalExpressproject.However,whenyouconvertaLabVIEWSignalExpressprojecttoaLabVIEWblockdiagram,thefrontpaneloftheVIthatyougeneratecontainsonlythecontrolsthatarenecessaryforexecutionandindicatorsthatmatchthedatatypesoftheoutputsignalsfromtheconvertedproject.Anygraph,chart,orotherdisplaysthattheLabVIEWSignalExpressprojectcontainsarenotreplicatedontheLabVIEWfrontpanel.However,youcanuseLabVIEWcontrolsandindicatorstobuildafrontpanelfortheVIanddefineacustomuserinterface.Forexample,youcancreategraphsonwhichtodisplaytheoutputsignals.RefertotheLabVIEWHelpformoreinformationaboutbuildingfrontpanelsinLabVIEW.

StepReferenceThissectioncontainsthestepsyoucanusetobuildmeasurementtasks.

LabVIEWSignalExpressStepsUsetheLabVIEWSignalExpressstepstobuildinteractivemeasurementapplications.

Toviewrelatedtopics,clicktheLocatebutton,shownatleft,inthetoolbaratthetopofthiswindow.TheLabVIEWSignalExpressHelphighlightsthistopicintheContentstabsoyoucannavigatetherelatedtopics.

AcquireSignalsUsetheAcquireSignalsstepstoacquiresignalsfromahardwaredevice.

Toviewrelatedtopics,clicktheLocatebutton,shownatleft,inthetoolbaratthetopofthiswindow.TheLabVIEWSignalExpressHelphighlightsthistopicintheContentstabsoyoucannavigatetherelatedtopics.

IVIScopeAcquireAcquiresananalogwaveformfromaninstrumentintheOscilloscopeIVIClass.Defaultvaluesarespecifictothehardwareanddriverspecified.Thedefaultsettingsmightnotbeapplicabletothemeasurementyouaretryingtoperform.TheIVIScopeAcquiretoolbarincludestwobuttonsyoucanusetosetparametervalues.ClicktheInitializebuttontosetIVIScopeAcquiretothedefaultsettings.ClicktheAutosetupbuttontosetparameterstovaluesthatIVIScopeAcquiredeterminesbestfitthesignalyouareacquiring.

NoteClickingtheAutosetupbuttonexecutesIVIScopeAcquire.

Tocommunicatewithaninstrument,youneedtoinstalltheinstrument-specificdriverandcreateasessionnamefortheinstrument.

Parameter DescriptionAutoscaleamplitude

ScalestheamplitudeaxisoftheAcquiredsignalsgraph.Thedefaultistoautoscaletheamplitude.

AcquiredSignals

Displaysthewaveformfromthedevice.Range(V)andOffset(V)setthehardwarelimits.

Configuration Containsthefollowingconfigurationoptions:Device—Containsthefollowingdeviceoptions:

IVIsessionname—Specifiesthesessionnametouseforthisstep.ThisstepretrievespossiblesessionnamesfromNationalInstrumentsMeasurement&AutomationExplorer(MAX).Youalsocancreateanewsessionoredit/deleteanexistingsession.Resourcedescriptor—Specifiestheinterfaceandtheaddressofthehardwaretoassociatewiththestep.Instrumentdriver—Displaysthenameofthedriverinuse.

Vertical—ContainschannelconfigurationoptionsthataffectthedataalongtheVoltage(V)axis.ThesettingsyouconfigurewiththeseoptionsarespecifictothechannelyouselectintheChannelsfield.Verticalcontainsthefollowingoptions:

Channels—Specifiesthephysicalchannelsfromwhichtogeneratedata.Enablechannel—Specifieswhethertoenabledataacquisitionontheselectedchannel.Range(V)—Specifiesthevalueoftheinputrangetheoscilloscopeusesforthechannel.Forexample,toacquireasinewavethatspans-5to5volts,enter10asthevalueofthisparameter.Inputimpedance(Ohms)—Specifiestheinputimpedanceyouwanttouseforthechannel.Probeattenuation—Specifiesthescalingfactorbywhichtheprobeyouattachtothechannelattenuatestheinput.Pass-1toautodetect.Offset(V)—SpecifiesthelocationofthecenteroftherangethatyouspecifywithRange(V).Enterthevaluewithrespecttoground.Forexample,toacquireasinewavethatspans0to10volts,enter5asthevalueofthisparameter.Coupling—Specifieshowyouwanttheoscilloscopetocoupletheinputsignalforthechannel.OptionsincludeAC,DC,andGND.Bandwidth(Hz)—Specifiesthemaximumfrequencyfortheinputsignalyouwanttheinstrumenttoaccommodatewithoutattenuatingthe

signalbymorethan3dB.Horizontal—Containsthefollowingdevice-specificoptionsforconfiguringtheTime(s)axis:

Starttime(s)—Specifiesthelengthoftimefromthetriggereventtothefirstpointinthewaveformrecord.Ifthisvalueispositive,thefirstpointinthewaveformrecordoccursafterthetriggerevent.Ifthisvalueisnegative,thefirstpointinthewaveformrecordoccursbeforethetriggerevent.Timeperrecord(s)—Specifiesthetimeinsecondsthatcorrespondstotherecordlength.Minrecordlength(S)—Specifiestheminimumnumberofpointsyourequireinthewaveformrecordforeachchannel.

Trigger Containsthefollowingtriggeroptions:Type—Specifiesthetypeoftriggeryouwanttheoscilloscopetouse.Containsthefollowingoptions:

Immediate—Configurestheoscilloscopeforimmediatetriggering.Theoscilloscopedoesnotwaitforatriggerofanykinduponinitialization.Edge—Configurestheoscilloscopeforedgetriggering.Anedgetriggeroccurswhenthetriggersignalcrossesthetriggerlevelyouspecifywiththeslopeyouspecify.TV—ConfigurestheoscilloscopeforTVtriggering.Runt—Configurestheoscilloscopeforrunttriggering.Arunttriggeroccurswhenthetriggersignalcrossesoneoftheruntthresholdstwicewithoutcrossingtheotherruntthreshold.

Glitch—Configurestheoscilloscopeforglitchtriggering.Aglitchtriggeroccurswhenthetriggersignalhasapulsewithawidththatislessthantheglitchwidth.Thetriggerdoesnotactuallyoccuruntiltheedgeofthepulsethatcorrespondstotheglitchwidthandpolarityyouspecifycrossesthetriggerlevel.Width—Configurestheoscilloscopeforwidthtriggering.Awidthtriggeroccurswhentheoscilloscopedetectsapositiveornegativepulsewithawidthbetween,oroptionallyoutside,thewidththresholds.Thetriggerdoesnotactuallyoccuruntiltheedgeofapulsethatcorrespondstothewidththresholdsandpolarityyouspecifycrossesthetriggerlevel.ACLine—ConfigurestheoscilloscopeforAClinetriggering.

Source—Specifiesthesourcefortheoscilloscopetomonitorforatrigger.Holdoff(s)—Specifiesthelengthoftimeyouwanttheoscilloscopetowaitafteritdetectsatriggeruntiltheoscilloscopeenablesthetriggersubsystemtodetectanothertrigger.Timeout(s)—Specifiesthemaximumamountoftimetowaitfortheoscilloscopetoacquiredata.Whenatimeoutoccursduringanacquisition,itisnormallyduetoafailuretotrigger.Thedefaultis10.Level(V)—[Type:Edge]Specifiesthevoltageyouwanttheoscilloscopetouseforedgetriggering.TheoscilloscopetriggerswhenthetriggersignalpassesthroughthethresholdyouspecifywiththisparameterandhastheslopeyouspecifywiththeSlopeparameter.

NoteThisparameteraffectsinstrumentbehavioronlywhenyouselectachannelortheexternaltriggerinputasthetriggersource.Youmaynotconfigurethetriggerlevelthattheoscilloscopeusesforothertriggersources,suchasVXITTLtriggerlines.

Slope—[Type:Edge]Specifieswhetheryouwantarisingedgeorafallingedgepassingthroughthetriggerleveltotriggertheoscilloscope.OptionsincludePositiveandNegative.Coupling—[Type:Edge]Specifiesthetriggercoupling.OptionsincludeAC,DC,HFReject,LFReject,andNoiseReject.Polarity—[Type:TV]SpecifiesthepolarityoftheTVsignal.OptionsincludePositiveandNegative.Signalformat—[Type:TV]SpecifiesthetypeofTVsignalonwhichtheoscilloscopetriggers.OptionsincludeNTSC,PAL,andSECAM.Event—[Type:TV]SpecifiestheTVeventonwhichyouwanttheoscilloscopetotrigger.OptionsincludeField1,Field2,AnyField,AnyLine,andLineNumber.Linenumber—[Type:TV]Specifiesthelineinthefieldonwhichyouwanttheoscilloscopetotrigger.Thespecifiedlinenumberisindependentofanyfield.ThismeansthattotriggeronthefirstlineofField2,youmustspecifyalinenumberof263(ifweassumethatField1has262lines).Polarity—[Type:Runt]Specifiesthepolarityoftheruntthatyouwanttotriggertheoscilloscope.Containsthefollowingoptions:

Positive—Triggersonapositiverunt.ApositiveruntoccurswhenarisingedgecrossestheLowthreshold(V)anddoes

notcrosstheHighthreshold(V)beforerecrossingtheLowthreshold(V).Negative—Triggersonanegativerunt.AnegativeruntoccurswhenafallingedgecrossestheHighthreshold(V)anddoesnotcrosstheLowthreshold(V)beforerecrossingtheHighthreshold(V).Either—Triggersoneitherapositiveornegativerunt.

Lowthreshold(V)—[Type:Runt]Specifiesthelowthresholdyouwanttheoscilloscopetouseforrunttriggering.Highthreshold(V)—[Type:Runt]Specifiesthehighthresholdyouwanttheoscilloscopetouseforrunttriggering.Level(V)—[Type:Glitch]Specifiesthevoltagethresholdyouwanttheoscilloscopetouseforglitchtriggering.Theoscilloscopetriggerswhenaglitchcrossesthetriggerthresholdyouspecifywiththisparameter.Polarity—[Type:Glitch]Specifiesthepolarityoftheglitchthatyouwanttotriggertheoscilloscope.OptionsincludePositive,Negative,andEither.Condition—[Type:Glitch]Specifiestheglitchcondition.TheoscilloscopetriggerswhenitdetectsapulsewithawidthlessthanorgreaterthantheWidth(s)value.OptionsincludeLessThanandGreaterThan.Width(s)—[Type:Glitch]Specifiesthelengthoftimeyouwanttheoscilloscopetousefortheglitchwidth.Theoscilloscopetriggerswhenitdetectsapulsewithawidthlessthanorgreaterthanthisvalue,dependingontheConditionparameter.Level(V)—[Type:Width]Specifiesthevoltage

thresholdyouwanttheoscilloscopetouseforwidthtriggering.TheoscilloscopetriggerswhentheedgeofapulsethatcorrespondstotheLowthreshold(V),Highthreshold(V),Condition,andPolaritycrossesthethresholdyouspecifyinthisparameter.Polarity—[Type:Width]Specifiesthepolarityofthepulsethatyouwanttotriggertheoscilloscope.OptionsincludePositiveandNegative.Highthreshold(V)—[Type:Width]Specifiesthehighwidththreshold.Lowthreshold(V)—[Type:Width]Specifiesthelowwidththreshold.Condition—[Type:Width]SpecifieswhetheryouwantapulsethatiswithinoroutsidetheHighthreshold(V)andLowthreshold(V)totriggertheoscilloscope.Containsthefollowingoptions:

Within—TriggersonpulsesthathaveawidththatislessthantheHighthreshold(V)andgreaterthantheLowThreshold(V).Outside—TriggersonpulsesthathaveawidththatiseithergreaterthantheHighthreshold(V)orlessthantheLowthreshold(V).

Slope—[Type:ACLine]Specifieswhetheryouwanttheoscilloscopetotriggeronazerocrossingwithapositive,negative,oreitherslopeofthenetworksupplyvoltage.OptionsincludePositive,Negative,andEither.

Advanced Containsthefollowingoption:AcquisitionSettings—Containsthefollowingoption:

Acquisitiontype—Specifiesthemannerinwhichyouwanttheoscilloscopetoacquiredataandfillthewaveform

record.Containsthefollowingoptions:Normal—Setstheoscilloscopetonormalacquisitionmode.Theoscilloscopeacquiresonesampleforeachpointinthewaveformrecord.Theoscilloscopecanusereal-timeorequivalent-timesampling.PeakDetect—Setstheoscilloscopetothepeak-detectacquisitionmode.Theoscilloscopeoversamplestheinputsignalandkeepstheminimumandmaximumvaluesthatcorrespondtoeachpositioninthewaveformrecord.Theoscilloscopeusesonlyreal-timesampling.HighResolution—Setstheoscilloscopetothehigh-resolutionacquisitionmode.Theoscilloscopeoversamplestheinputsignalandcalculatesanaveragevalueforeachpositioninthewaveformrecord.Theoscilloscopeusesonlyreal-timesampling.Envelope—Setstheoscilloscopetotheenvelopeacquisitionmode.Theoscilloscopeacquiresmultiplewaveformsandkeepstheminimumandmaximumvoltagesitacquiresforeachpointinthewaveformrecord.Theoscilloscopecanusereal-timeorequivalent-timesampling.Average—Setstheoscilloscope

totheaverageacquisitionmode.Theoscilloscopeacquiresmultiplewaveformsandcalculatesanaveragevalueforeachpointinthewaveformrecord.Theoscilloscopecanusereal-timeorequivalent-timesampling.

NoteWhenyousetthisparametertoEnvelopeorPeakDetect,theoscilloscopeacquiresminimumandmaximumwaveforms.

ExecutionControl

Containsthefollowingexecutioncontroloptions:Startthisstepafter—Makesthestepwaituntilanotherstephasstartedbeforeexecuting.Youcanmakethestepwaitonanyotherhardwarestepintheprojectbyselectingthesteptowaitonfromthepull-downmenu.

Youcanusethisoptiontoforceanacquisitiondevicetostartafteragenerationdevicestarts.Youalsocanusethisoptiontoensurethatadevicegeneratingatriggersignalstartsafterthedevicereceivingthesignal,whichavoidssendingthesignalbeforethereceiverisready.Steptowaitfor—Liststhepossiblestepsforwhichthisstepcanwait.Pre-executiondelay(ms)—Specifiestheamountoftimetowaitbeforethestepexecutes.Ifyouconfigurethesteptostartafteranotherstep,thedelayrepresentstheamountoftimetowaitafterthespecifiedstepstarts.Post-executiondelay(ms)—Specifiestheamountoftimetowaitafterthestepexecutes.

IVIDMMAcquireAcquiresasignalfromaninstrumentintheDigitalMultimeterIVIClass.Defaultvaluesarespecifictothehardwareanddriverspecified.Thedefaultsettingsmaynotbeapplicabletothemeasurementyouaretryingtoperform.ClicktheInitializebutton,locatedonthestep'stoolbar,atanytimetoresetthesteptothedefaultsettings.Tocommunicatewithaninstrument,youneedtoinstalltheinstrument-specificdriverandcreateasessionnamefortheinstrument.

Parameter DescriptionOutputDisplay

Displaysthemeasurement,formattedaccordingtotheMeasurementfunction,Range,andResolution.

Configuration Containsthefollowingconfigurationoptions:Device—Containsthefollowingdeviceoptions:

IVIsessionname—Specifiesthesessionnametouseforthisstep.ThisstepretrievespossiblesessionnamesfromNationalInstrumentsMeasurement&AutomationExplorer(MAX).Youalsocancreateanewsessionoredit/deleteanexistingsession.Resourcedescriptor—Specifiestheinterfaceandtheaddressofthehardwaretoassociatewiththestep.Instrumentdriver—Displaysthenameofthedriverinuse.

BasicParameters—Containsthefollowingoptions:

Measurementfunction—SpecifiesthetypeofmeasurementyouwanttheDMMtoperform.OptionsincludeDCVolts,ACVolts,DCCurrent,ACCurrent,2WireResistance,4WireResistance,AC+DCVolts,AC+DCCurrent,Frequency,andPeriod.Range—SpecifieswhetherAutoRange

isused.Containsthefollowingoptions:AutoRange—SpecifiesthattheDMMautomaticallycalculatestherangebeforeeachmeasurement.SpecifyRange—Allowsyoutospecifytherangeandusesthisvalueforallsubsequentmeasurementsuntilyouchangethemeasurementconfiguration.

Rangevalue(V)—[Measurementfunction:DCVolts,ACVolts,AC+DCVolts]Therangeinvoltsforthecurrentmeasurement.Rangevalue(A)—[Measurementfunction:DCCurrent,ACCurrent,AC+DCCurrent]Therangeinampsforthecurrentmeasurement.Rangevalue(Ohm)—[Measurementfunction:2WireResistance,4WireResistance]Therangeinohmsforthecurrentmeasurement.Rangevalue(Hz)—[Measurementfunction:Frequency]Therangeinhertzforthecurrentmeasurement.Rangevalue(s)—[Measurementfunction:Period]Therangeinsecondsforthecurrentmeasurement.Resolution—Specifiesthedigitalresolutionofthemeasurement.SetRangetoSpecifyRangetoenablethisoption.Sampleperiod(s)—Specifieshowoftentoexecutethestep.

MeasurementSpecificParameters—Containsthefollowingoptions:

Autozero—SpecifiesthattheDMM

internallydisconnectstheinputsignalandtakesazeroreading.TheDMMthensubtractsthezeroreadingfromthemeasurementtopreventoffsetvoltagespresentfromaffectingmeasurementaccuracy.ThisoptiondoesnotappearifyousetMeasurementfunctiontoFrequencyorPeriod.Containsthefollowingoptions:

On—ConfigurestheDMMtotakeazeroreadingforeachmeasurement.TheDMMsubtractsthezeroreadingfromthevalueitmeasures.Off—DisablestheAutozerooption.Once—ConfigurestheDMMtotakeazeroreadingimmediately.TheDMMthensubtractsthiszeroreadingfromallsubsequentvaluesitmeasures.

ACminfrequency(Hz)—[Measurementfunction:ACVolts,ACCurrent,AC+DCVolts,AC+DCCurrent]Specifiestheminimumexpectedfrequencycomponentoftheinputsignalinhertz.ACmaxfrequency(Hz)—[Measurementfunction:ACVolts,ACCurrent,AC+DCVolts,AC+DCCurrent]Specifiesthemaximumexpectedfrequencycomponentoftheinputsignalinhertz.Frequencyvoltagerange—[Measurementfunction:Frequency,Period]SpecifieswhetherthefrequencyvoltageAutoRangeisused.Containsthefollowingoptions:

AutoRange—ConfigurestheDMMtoautomaticallycalculatethevoltagerangebeforeeachfrequencyorperiodmeasurement.SpecifyRange—Disablesautoranging.TheDMMsetsthevoltagerangetotherangespecifiedinFrequencyrange(V).

Frequencyrange(V)—[Measurementfunction:Frequency,Period]Specifiestheexpectedmaximumamplitudeoftheinputsignal.Theminimumpeak-to-peaksignalamplitudethattheDMMcandetectis10%ofthespecifiedvoltagerange.

PowerlineFrequency(Hz)—Specifiesthepowerlinefrequencyinhertz.

Trigger Containsthefollowingtriggeroptions:Type—Specifiesthetriggersourceyouwanttouse.AftertheDMMreceivesthetrigger,theDMMwaitsthelengthoftimeyouspecifyintheDelay(s)parameter.TheDMMthentakesameasurement.ThedefaultisImmediate.Containsthefollowingoptions:

Immediate—Doesnotwaitforatriggerofanykind.External—Waitsforatriggerontheexternalinput.Software—Waitsuntilyoupresstheassociatedtriggerbuttoninthetoolbar.Digital—Waitsforatriggeronadigitalinputspecifiedbythetriggersource.

Delay(s)—SpecifiesthelengthoftimetheDMMwaitsafteritreceivesthetriggerandbeforeittakesameasurement.

Auto—ConfigurestheDMMtoautomaticallycalculatethetriggerdelaybeforeeachmeasurement.Timeout(s)—ConfigurestheamountoftimetowaitwhileretrievingareadingfromtheDMM.Thedefaultis5seconds.Slope—[Type:External]SpecifieswhetheryouwantarisingedgeorafallingedgepassingthroughthetriggerleveltotriggertheDMM.Containsthefollowingoptions:

Positive—Triggersontherisingedgeoftheexternaltrigger.Negative—Triggersonthefallingedgeoftheexternaltrigger.

Softwaretriggersource—[Type:Software]Specifiesthetriggersourcetowhichyouwanttheinstrumenttorespond.Toactivatethetrigger,clicktheassociatedtriggerbuttoninthetoolbar.Executionwaitsuntilyouclicktheassociatedtriggerbuttoninthetoolbar.Containsthefollowingoptions:

TriggerA—(Default)SpecifiesTriggerAasthetriggersource.TriggerB—SpecifiesTriggerBasthetriggersource.TriggerC—SpecifiesTriggerCasthetriggersource.

Source—[Type:Digital]Specifiesthetriggersourceyouwanttouse.Containsthefollowingoptions:

PXITRIG0orVXITTL0—WaitsuntilitreceivesatriggeronthePXITRIG0line(forPXIinstruments)ortheVXITTL0line(forVXIinstruments).PXITRIG1orVXITTL1—WaitsuntilitreceivesatriggeronthePXITRIG1line(forPXIinstruments)ortheVXITTL1

line(forVXIinstruments).PXITRIG2orVXITTL2—WaitsuntilitreceivesatriggeronthePXITRIG2line(forPXIinstruments)ortheVXITTL2line(forVXIinstruments).PXITRIG3orVXITTL3—WaitsuntilitreceivesatriggeronthePXITRIG3line(forPXIinstruments)ortheVXITTL3line(forVXIinstruments).PXITRIG4orVXITTL4—WaitsuntilitreceivesatriggeronthePXITRIG4line(forPXIinstruments)ortheVXITTL4line(forVXIinstruments).PXITRIG5orVXITTL5—WaitsuntilitreceivesatriggeronthePXITRIG5line(forPXIinstruments)ortheVXITTL5line(forVXIinstruments).PXITRIG6orVXITTL6—WaitsuntilitreceivesatriggeronthePXITRIG6line(forPXIinstruments)ortheVXITTL6line(forVXIinstruments).PXITRIG7orVXITTL7—WaitsuntilitreceivesatriggeronthePXITRIG7line(forPXIinstruments)ortheVXITTL7line(forVXIinstruments).ECL0—WaitsuntilitreceivesatriggerontheVXIECL0line.ECL1—WaitsuntilitreceivesatriggerontheVXIECL1line.PXIStar—WaitsuntilitreceivesatriggeronthePXISTARtriggerbus.RTSI0—WaitsuntilitreceivesatriggeronRTSIline0.RTSI1—WaitsuntilitreceivesatriggeronRTSIline1.RTSI2—WaitsuntilitreceivesatriggeronRTSIline2.

RTSI3—WaitsuntilitreceivesatriggeronRTSIline3.RTSI4—WaitsuntilitreceivesatriggeronRTSIline4.RTSI5—WaitsuntilitreceivesatriggeronRTSIline5.RTSI6—WaitsuntilitreceivesatriggeronRTSIline6.

ExecutionControl

Containsthefollowingexecutioncontroloptions:Startthisstepafter—Makesthestepwaituntilanotherstephasstartedbeforeexecuting.Youcanmakethestepwaitonanyotherhardwarestepintheprojectbyselectingthesteptowaitonfromthepull-downmenu.

Youcanusethisoptiontoforceanacquisitiondevicetostartafteragenerationdevicestarts.Youalsocanusethisoptiontoensurethatadevicegeneratingatriggersignalstartsafterthedevicereceivingthesignal,whichavoidssendingthesignalbeforethereceiverisready.Steptowaitfor—Liststhepossiblestepsforwhichthisstepcanwait.Pre-executiondelay(ms)—Specifiestheamountoftimetowaitbeforethestepexecutes.Ifyouconfigurethesteptostartafteranotherstep,thedelayrepresentstheamountoftimetowaitafterthespecifiedstepstarts.Post-executiondelay(ms)—Specifiestheamountoftimetowaitafterthestepexecutes.

ReadSharedVariablesReadsthevaluesofsharedvariablescreatedinLabVIEWSignalExpressandLabVIEW,aswellasdatapublishedusingDataSockettechnologyordatathatmeetsOPCspecifications.Toselectdataorasharedvariabletoread,clicktheBrowsebuttontodisplaytheSelectNetworkItemdialogboxandnavigatetothedataorsharedvariable.YoualsocanaddmachinestothelistthatappearsintheSelectNetworkItemdialogboxtosearchforadditionaldataorsharedvariables.

Parameter DescriptionStepConfiguration

Containsthefollowingoption:Sampleperiod(s)—Specifiestheperiod(inseconds)atwhichtoreaddata.

AddSharedVariable

Containsthefollowingoptions:Networkpath—Specifiesthepathtothedataorsharedvariabletoread.Browse—OpenstheSelectNetworkItemdialogbox,whichallowsyoutobrowsetothenetworklocationofdataorasharedvariable.Add—AddsthedataorsharedvariablespecifiedintheNetworkpathtothestep.

NetworkPaths

DisplaysthenetworkpathsofthedataorsharedvariablesLabVIEWSignalExpressisreading.

Removepath Removestheselecteddataorsharedvariablefromthestep.

GenerateSignalsUsetheGenerateSignalsstepstogeneratesignalstoahardwaredevice.

Toviewrelatedtopics,clicktheLocatebutton,shownatleft,inthetoolbaratthetopofthiswindow.TheLabVIEWSignalExpressHelphighlightsthistopicintheContentstabsoyoucannavigatetherelatedtopics.

IVIFGENStandardFunctionGeneratesananalogstandardfunctionusinganinstrumentintheArbitraryWaveform/FunctionGeneratorIVIclass.Defaultvaluesarespecifictothehardwareanddriverspecified.Thedefaultsettingsmaynotbeapplicabletothemeasurementyouaretryingtoperform.ClicktheInitializebutton,locatedonthestep'stoolbar,atanytimetoresetthesteptothedefaultsettings.Tocommunicatewithaninstrument,youneedtoinstalltheinstrument-specificdriverandcreateasessionnamefortheinstrument.

Parameter DescriptionFunctionPreview

Displaysapreviewofthefunction.TheverticalandhorizontalgraphaxesareformattedaccordingtotheChannelConfigurationsettingsthatareappliedtothesignalgenerator.

Configuration Containsthefollowingconfigurationoptions:Device—Containsthefollowingdeviceoptions:

IVIsessionname—Specifiesthesessionnametouseforthisstep.ThisstepretrievespossiblesessionnamesfromNationalInstrumentsMeasurement&AutomationExplorer(MAX).Youalsocancreateanewsessionoredit/deleteanexistingsession.Resourcedescriptor—Specifiestheinterfaceandtheaddressofthehardwaretoassociatewiththestep.Instrumentdriver—Displaysthenameofthedriverinuse.

ChannelConfiguration—Containsthefollowingchannelconfigurationoptions:

Channels—Specifiesthephysicalchannelsonwhichdataisgenerated.Enablechannel—Specifieswhethertoenabledataacquisitionontheselectedchannel.

Type—Specifiesthestandardwaveformthatyouwantthefunctiongeneratortoproduce.OptionsincludeSine,Square,Triangle,RampUp,RampDown,andDC.Amplitude(Vpp)—Specifiestheamplitudeofthestandardwaveformthatyouwantthefunctiongeneratortoproduce.Thisvalueistheamplitudeattheoutputterminal.Forexample,toproduceawaveformrangingfrom-5to+5volts,settheAmplitude(Vpp)to10volts.Startphase(deg)—Specifiesthehorizontaloffsetofthestandardwaveformyouwantthefunctiongeneratortoproduce.Youspecifythispropertyindegreesofonewaveformcycle.Astartphaseof180degreesmeansoutputgenerationbeginshalfwaythroughthewaveform.Astartphaseof360degreesoffsetstheoutputbyanentirewaveformcycle,whichisidenticaltoastartphaseof0degrees.Frequency(Hz)—Specifiesthefrequencyofthestandardwaveformthatyouwantthefunctiongeneratortoproduce.DCoffset(V)—SpecifiestheDCoffsetofthestandardwaveformthatyouwantthefunctiongeneratortoproduce.ThevalueistheoffsetfromgroundtothecenterofthewaveformyouspecifywiththeTypeparameter.Forexample,toconfigureawaveformwithanamplitudeof10voltstorangefrom0to+10volts,setDCoffset(V)to5volts.Outputimpedance(Ohms)—Specifies

theimpedancevalueyouwantthefunctiongeneratortouse.Avalueof0indicatesthatthefunctiongeneratorisconnectedtoahighimpedanceload.Dutycycle(%)—Specifiesthepercentageoftimeasquarewaveremainshighversusoneentireperiod.Thedefaultis50%.Dutycycle(%)isavailableonlywhenyouselectSquareinType.

GenerationMode—Containsthefollowinggenerationmodeoptions:

Generatecontinuously—Generatestheinputsignalcontinuously.Ifyouruntheprojectcontinuously,thestepgeneratestheinputsignalrepeatedlywithoutdiscontinuities.IfyouruntheprojectinRunOncemode,thestepgeneratestheinputsignalonce.GenerateNwaveforms—GeneratestheinputsignalNtimesinanon-continuousfashion.Ifyouruntheprojectcontinuously,thestepgeneratestheinputsignalrepeatedlybutdiscontinuously.IfyouruntheprojectinRunOncemode,thestepgeneratestheinputsignalonce.Youcanusethisoptionifyouwantthedevicetogenerateastarttriggereverytimethedevicestartsgeneratingthesignal.Numberofwaveforms—Specifiesthenumberoftimestogeneratethewaveform.

Trigger Containsthefollowingtriggeroptions:ChannelTriggering—Containsthefollowingchanneltriggeroptions:

Channels—Specifiesthephysical

channelsthathaveatriggerassociatedwiththem.Eachchannelcanbetriggeredindependently.Type—Specifiesthetriggersourcetowhichyouwantthefunctiongeneratortorespond.ThedefaultisImmediate.Containsthefollowingoptions:

Immediate—Doesnotwaitforatriggerofanykind.Internal—Waitsforatriggerontheinternaltriggerinput.External—Waitsforatriggerontheexternaltriggerinput.Software—WaitsuntilthesoftwaretriggerbuttonspecifiedbytheSoftwaretriggersourceispressedonthetoolbar.Digital—Waitsforatriggeronadigitalinputspecifiedbythetriggersource.

Internaltriggerrate(trig/s)—Specifiestherateatwhichyouwanttheinternaltriggerrateofthefunctiongeneratortogeneratetriggersignals.Internaltriggerrate(trig/s)isavailableonlywhenyouselectInternalinType.Softwaretriggersource—[Type:Software]Specifiesthetriggersourcetowhichyouwanttheinstrumenttorespond.Toactivatethetrigger,clicktheassociatedtriggerbuttoninthetoolbar.Executionwaitsuntilyouclicktheassociatedtriggerbuttoninthetoolbar.Containsthefollowingoptions:

TriggerA—(Default)SpecifiesTriggerAasthetriggersource.TriggerB—SpecifiesTriggerB

asthetriggersource.TriggerC—SpecifiesTriggerCasthetriggersource.

Source—[Type:Digital]Specifiesthetriggersourceyouwanttouse.Containsthefollowingoptions:

PXITRIG0orVXITTL0—WaitsuntilitreceivesatriggeronthePXITRIG0line(forPXIinstruments)ortheVXITTL0line(forVXIinstruments).PXITRIG1orVXITTL1—WaitsuntilitreceivesatriggeronthePXITRIG1line(forPXIinstruments)ortheVXITTL1line(forVXIinstruments).PXITRIG2orVXITTL2—WaitsuntilitreceivesatriggeronthePXITRIG2line(forPXIinstruments)ortheVXITTL2line(forVXIinstruments).PXITRIG3orVXITTL3—WaitsuntilitreceivesatriggeronthePXITRIG3line(forPXIinstruments)ortheVXITTL3line(forVXIinstruments).PXITRIG4orVXITTL4—WaitsuntilitreceivesatriggeronthePXITRIG4line(forPXIinstruments)ortheVXITTL4line(forVXIinstruments).PXITRIG5orVXITTL5—WaitsuntilitreceivesatriggeronthePXITRIG5line(forPXIinstruments)ortheVXITTL5line(forVXIinstruments).PXITRIG6orVXITTL6—Waits

untilitreceivesatriggeronthePXITRIG6line(forPXIinstruments)ortheVXITTL6line(forVXIinstruments).PXITRIG7orVXITTL7—WaitsuntilitreceivesatriggeronthePXITRIG7line(forPXIinstruments)ortheVXITTL7line(forVXIinstruments).ECL0—WaitsuntilitreceivesatriggerontheVXIECL0line.ECL1—WaitsuntilitreceivesatriggerontheVXIECL1line.PXIStar—WaitsuntilitreceivesatriggeronthePXISTARtriggerbus.RTSI0—WaitsuntilitreceivesatriggeronRTSIline0.RTSI1—WaitsuntilitreceivesatriggeronRTSIline1.RTSI2—WaitsuntilitreceivesatriggeronRTSIline2.RTSI3—WaitsuntilitreceivesatriggeronRTSIline3.RTSI4—WaitsuntilitreceivesatriggeronRTSIline4.RTSI5—WaitsuntilitreceivesatriggeronRTSIline5.RTSI6—WaitsuntilitreceivesatriggeronRTSIline6.

Referenceclocksource—Specifiesthereferenceclocksourceyouwantthefunctiongeneratortouse.Thefunctiongeneratorderivesthefrequenciesandsampleratesthatitusestogeneratewaveformsfromthesourceyouspecify.OptionsincludeInternal,External,andRTSIClock.Forexample,whenyouset

ReferenceclocksourcetoExternal,thefunctiongeneratorusesthesignalitreceivesatitsexternalclockterminalasitsreferenceclock.

ExecutionControl

Containsthefollowingexecutioncontroloptions:Startthisstepafter—Makesthestepwaituntilanotherstephasstartedbeforeexecuting.Youcanmakethestepwaitonanyotherhardwarestepintheprojectbyselectingthesteptowaitonfromthepull-downmenu.

Youcanusethisoptiontoforceanacquisitiondevicetostartafteragenerationdevicestarts.Youalsocanusethisoptiontoensurethatadevicegeneratingatriggersignalstartsafterthedevicereceivingthesignal,whichavoidssendingthesignalbeforethereceiverisready.Steptowaitfor—Liststhepossiblestepsforwhichthisstepcanwait.Pre-executiondelay(ms)—Specifiestheamountoftimetowaitbeforethestepexecutes.Ifyouconfigurethesteptostartafteranotherstep,thedelayrepresentstheamountoftimetowaitafterthespecifiedstepstarts.Post-executiondelay(ms)—Specifiestheamountoftimetowaitafterthestepexecutes.

IVIFGENArbitraryWaveformGeneratesananalogarbitrarysignalusinganinstrumentintheArbitraryWaveform/FunctionGeneratorIVIclass.Defaultvaluesarespecifictothehardwareanddriverspecified.Thedefaultsettingsmaynotbeapplicabletothemeasurementyouaretryingtoperform.ClicktheInitializebutton,locatedonthestep'stoolbar,atanytimetoresetthesteptothedefaultsettings.Tocommunicatewithaninstrument,youneedtoinstalltheinstrument-specificdriverandcreateasessionnamefortheinstrument.

Parameter DescriptionWaveformPreview

Displaysapreviewofthewaveformdownloadedtothefunctiongenerator.TheverticalandhorizontalgraphaxesareformattedaccordingtotheSamplerate(S/s),Gain,andOffset(V)settingsappliedtothefunctiongenerator.

Configuration Containsthefollowingarbitrarywaveformconfigurationoptions:

Device—Containsthefollowingdeviceoptions:IVIsessionname—Specifiesthesessionnametouseforthisstep.ThisstepretrievespossiblesessionnamesfromNationalInstrumentsMeasurement&AutomationExplorer(MAX).Youalsocancreateanewsessionoredit/deleteanexistingsession.Resourcedescriptor—Specifiestheinterfaceandtheaddressofthehardwaretoassociatewiththestep.Instrumentdriver—Displaysthenameofthedriverinuse.

ChannelConfiguration—Containsthefollowingchannelconfigurationoptions:

Channels—Specifiesthephysicalchannelsonwhichdataisgenerated.Enablechannel—Specifieswhetherto

enabledataacquisitionontheselectedchannel.Inputsignal—Selecttheappropriatewaveformtogenerate.GenerationMode—Containsthefollowinggenerationmodeoptions:

Generatecontinuously—Generatestheinputsignalcontinuously.Ifyouruntheprojectcontinuously,thestepgeneratestheinputsignalrepeatedlywithoutdiscontinuities.IfyouruntheprojectinRunOncemode,thestepgeneratestheinputsignalonce.GenerateNwaveforms—GeneratestheinputsignalNtimesinanon-continuousfashion.Ifyouruntheprojectcontinuously,thestepgeneratestheinputsignalrepeatedlybutdiscontinuously.IfyouruntheprojectinRunOncemode,thestepgeneratestheinputsignalonce.Youcanusethisoptionifyouwantthedevicetogenerateastarttriggereverytimethedevicestartsgeneratingthesignal.Numberofwaveforms—NumberoftimestogeneratetheInputSignal.

OutputSignal—Containsthefollowingoutputsignaloptions:

Extractfromwaveform—Specifieswhethersettingsfor

Samplerate(S/s),Gain,andOffset(V)areextractedfromthewaveformorspecifiedmanually.WhenyouremovethecheckmarkfromtheExtractfromwaveformcheckbox,youfirstmustnormalizethedatapointstoarangeof-1to+1.Samplerate(S/s)—Specifiesthesamplerateatwhichyouwantthefunctiongeneratortooutputarbitrarywaveforms.Gain—Specifiesthefactorbywhichthefunctiongeneratorscalesthearbitrarywaveformdata.Whenyoucreatearbitrarywaveforms,youfirstmustnormalizethedatapointstoarangeof-1to+1.Youusethispropertytoscalethearbitrarywaveformtootherranges.Forexample,toconfiguretheoutputsignaltorangefrom-2to+2volts,setGainto2.Offset(V)—Specifiesthevaluethefunctiongeneratoraddstothearbitrarywaveformdata.Whenyoucreatearbitrarywaveforms,youfirstmustnormalizethedatapointstoarangeof-1to+1.Youusethisparametertoshifttherangeofthearbitrarywaveform.Forexample,toconfiguretheoutputsignaltorangefrom0to2voltsinsteadof-1to1volts,setOffset(V)to1.Impedance(Ohms)—Specifies

theimpedancevalueyouwantthefunctiongeneratortouse.Avalueof0indicatesthatthefunctiongeneratorisconnectedtoahighimpedanceload.Frequency(Hz)—Specifiesthefrequencyatwhichyouwantthefunctiongeneratortoproduceonecycleofanarbitrarywaveform.

Trigger Containsthefollowingtriggeroptions:ChannelTriggering—Containsthefollowingchanneltriggeroptions:

Channels—Specifiesthephysicalchannelsthathaveatriggerassociatedwiththem.Eachchannelcanbetriggeredindependently.Type—Specifiesthetriggersourcetowhichyouwantthefunctiongeneratortorespond.ThedefaultisImmediate.Containsthefollowingoptions:

Immediate—Doesnotwaitforatriggerofanykind.Internal—Waitsforatriggerontheinternaltriggerinput.External—Waitsforatriggerontheexternaltriggerinput.SoftwareTriggerFunction—WaitsuntilthesoftwaretriggerbuttonspecifiedbytheSoftwaretriggersourceispressedonthetoolbar.Digital—Waitsforatriggeronadigitalinputspecifiedbythetriggersource.

Internaltriggerrate(trig/s)—Specifies

therateatwhichyouwanttheinternaltriggerrateofthefunctiongeneratortogeneratetriggersignals.Internaltriggerrate(trig/s)isavailableonlywhenyouselectInternalinType.Softwaretriggersource—[Type:Software]Specifiesthetriggersourcetowhichyouwanttheinstrumenttorespond.Toactivatethetrigger,clicktheassociatedtriggerbuttoninthetoolbar.Executionwaitsuntilyouclicktheassociatedtriggerbuttoninthetoolbar.Containsthefollowingoptions:

TriggerA—(Default)SpecifiesTriggerAasthetriggersource.TriggerB—SpecifiesTriggerBasthetriggersource.TriggerC—SpecifiesTriggerCasthetriggersource.

Source—[Type:Digital]Specifiesthetriggersourceyouwanttouse.Containsthefollowingoptions:

PXITRIG0orVXITTL0—WaitsuntilitreceivesatriggeronthePXITRIG0line(forPXIinstruments)ortheVXITTL0line(forVXIinstruments).PXITRIG1orVXITTL1—WaitsuntilitreceivesatriggeronthePXITRIG1line(forPXIinstruments)ortheVXITTL1line(forVXIinstruments).PXITRIG2orVXITTL2—WaitsuntilitreceivesatriggeronthePXITRIG2line(forPXIinstruments)ortheVXITTL2line(forVXIinstruments).

PXITRIG3orVXITTL3—WaitsuntilitreceivesatriggeronthePXITRIG3line(forPXIinstruments)ortheVXITTL3line(forVXIinstruments).PXITRIG4orVXITTL4—WaitsuntilitreceivesatriggeronthePXITRIG4line(forPXIinstruments)ortheVXITTL4line(forVXIinstruments).PXITRIG5orVXITTL5—WaitsuntilitreceivesatriggeronthePXITRIG5line(forPXIinstruments)ortheVXITTL5line(forVXIinstruments).PXITRIG6orVXITTL6—WaitsuntilitreceivesatriggeronthePXITRIG6line(forPXIinstruments)ortheVXITTL6line(forVXIinstruments).PXITRIG7orVXITTL7—WaitsuntilitreceivesatriggeronthePXITRIG7line(forPXIinstruments)ortheVXITTL7line(forVXIinstruments).ECL0—WaitsuntilitreceivesatriggerontheVXIECL0line.ECL1—WaitsuntilitreceivesatriggerontheVXIECL1line.PXIStar—WaitsuntilitreceivesatriggeronthePXISTARtriggerbus.RTSI0—WaitsuntilitreceivesatriggeronRTSIline0.RTSI1—WaitsuntilitreceivesatriggeronRTSIline1.RTSI2—Waitsuntilitreceivesa

triggeronRTSIline2.RTSI3—WaitsuntilitreceivesatriggeronRTSIline3.RTSI4—WaitsuntilitreceivesatriggeronRTSIline4.RTSI5—WaitsuntilitreceivesatriggeronRTSIline5.RTSI6—WaitsuntilitreceivesatriggeronRTSIline6.

Referenceclocksource—Specifiesthereferenceclocksourceyouwantthefunctiongeneratortouse.Thefunctiongeneratorderivesthefrequenciesandsampleratesthatitusestogeneratewaveformsfromthesourceyouspecify.OptionsincludeInternal,External,andRTSIClock.Forexample,whenyousetReferenceclocksourcetoExternal,thefunctiongeneratorusesthesignalitreceivesatitsexternalclockterminalasitsreferenceclock.

ExecutionControl

Containsthefollowingexecutioncontroloptions:Startthisstepafter—Makesthestepwaituntilanotherstephasstartedbeforeexecuting.Youcanmakethestepwaitonanyotherhardwarestepintheprojectbyselectingthesteptowaitonfromthepull-downmenu.

Youcanusethisoptiontoforceanacquisitiondevicetostartafteragenerationdevicestarts.Youalsocanusethisoptiontoensurethatadevicegeneratingatriggersignalstartsafterthedevicereceivingthesignal,whichavoidssendingthesignalbeforethereceiverisready.Steptowaitfor—Liststhepossiblestepsforwhichthisstepcanwait.Pre-executiondelay(ms)—Specifiestheamountoftimetowaitbeforethestepexecutes.Ifyouconfigurethesteptostartafteranother

step,thedelayrepresentstheamountoftimetowaitafterthespecifiedstepstarts.Post-executiondelay(ms)—Specifiestheamountoftimetowaitafterthestepexecutes.

IVIPowerSupplyGeneratesavoltagelevelusinganinstrumentintheDCPowerSupplyIVIclass.Defaultvaluesarespecifictothehardwareanddriverspecified.Thedefaultsettingsmaynotbeapplicabletothemeasurementyouaretryingtoperform.ClicktheInitializebutton,locatedonthestep'stoolbar,atanytimetoresetthesteptothedefaultsettings.Tocommunicatewithaninstrument,youneedtoinstalltheinstrument-specificdriverandcreateasessionnamefortheinstrument.

Parameter DescriptionQuerydeviceformeasurement

Queriesthepowersupplyfortheactualcurrentandvoltagethedeviceisgenerating.

NoteWhenyouplaceacheckmarkintheQuerydeviceformeasurementcheckbox,theperformanceofthedevicedecreases.

VoltageDisplay

Displaysthevoltage(V)ofthepowersupply.

CurrentDisplay

Displaysthecurrent(A)ofthepowersupply.

Output Containsthefollowingoutputoptions:Exportover-voltagetripped—Exportswhethertheover-voltagewastrippedasaBooleanvalueintheProjectView.Exportover-currenttripped—Exportswhethertheover-currentwastrippedasaBooleanvalueintheProjectView.

Configuration Containsthefollowingpowersupplyconfigurationoptions:

Device—Containsthefollowingdeviceoptions:IVIsessionname—Specifiesthesessionnametouseforthisstep.ThisstepretrievespossiblesessionnamesfromNationalInstrumentsMeasurement&AutomationExplorer(MAX).Youalso

cancreateanewsessionoredit/deleteanexistingsession.Resourcedescriptor—Specifiestheinterfaceandtheaddressofthehardwaretoassociatewiththestep.Instrumentdriver—Displaysthenameofthedriverinuse.

ChannelConfiguration—Containsthefollowingchannelconfigurationoptions:

Channels—Specifiesthephysicalchannelsfromwhichtogeneratedata.Enablechannel—Specifieswhethertoenabledataacquisitionontheselectedchannel.Voltagelevel(V)—SpecifiestheDCvoltageyouwantthepowersupplytoattempttogenerate.OVPenabled—Specifieswhetheryouwanttouseanover-voltageprotectionlimit.PlaceacheckmarkinthischeckboxtoenabletheOVPlimit(V)field.OVPlimit(V)—Specifiestheover-voltageprotectionlimityouwanttouse.Specifyoutputrange—Selectthisoptiontodefineanoutputrangefortheoutputcurrentorvoltage.Rangetype—Specifiesthetypeofrangetoconfigure.Range(A)—Specifiestherangeinamperes.Range(V)—Specifiesthevalueoftheinputrangetheoscilloscopeusesforthechannel.Forexample,toacquireasinewavethatspans-5to5volts,enter10asthevalueofthisparameter.Currentlimitbehavior—Specifiesthe

behavioryouwantthepowersupplytoexhibitwhentheoutputcurrentisgreaterthanorequaltothevalueofCurrentlimit(A).OptionsincludeRegulateandTrip.Currentlimit(A)—Specifiesthecurrentlimityouwanttouse.

Trigger Containsthefollowingtriggeroptions:Triggergeneration—Specifieswhetheranychannelswaitfortriggers.Triggergenerationisdisabledbydefault.IfyoudonotenableTriggergeneration,thepowersupplygeneratesthecurrentandVoltagelevel(V)whenyouclicktheRunbutton.PlaceacheckmarkinthischeckboxtoenabletheChannelTriggeringoptionsandconfiguretriggers.ChannelTriggering—Containsthefollowingchanneltriggeroptions:

Channels—Specifiesthephysicalchannelsthathaveatriggerassociatedwiththem.Eachchannelcanbetriggeredindependently.Type—Specifiesthetriggersourcetowhichyouwantthepowersupplytorespond.ThedefaultisImmediate.Containsthefollowingoptions:

Immediate—Doesnotwaitforatriggerofanykind.External—Waitsforatriggerontheexternaltriggerinput.Software—Waitsuntilthesoftwaretriggerbuttonispressedfromthetoolbar,specifiedbythesoftwaretriggersource.Digital—Waitsforatriggeronadigitalinputspecifiedbythetriggersource.

Triggeredlevel(V)—SpecifiestheDCvoltagelevelyouwantthepowersupplytoattempttogenerateafteritreceivesatrigger.Triggeredcurrentlimit(A)—Specifiesthecurrentlimityouwantthepowersupplytouseafteritreceivesatrigger.Softwaretriggersource—Specifiesthesoftwaretriggersourcetowhichyouwanttheinstrumenttorespond.OptionsincludeTriggerA,TriggerB,andTriggerC.ThedefaultisTriggerA.SoftwaretriggersourceisavailableonlywhenyouselectSoftwareinType.Source—Specifiesthetriggersourceyouwanttouse.SourceisavailableonlywhenyouselectDigitalinType.Containsthefollowingoptions:

PXITRIG0orVXITTL0—WaitsuntilitreceivesatriggeronthePXITRIG0line(forPXIinstruments)ortheVXITTL0line(forVXIinstruments).PXITRIG1orVXITTL1—WaitsuntilitreceivesatriggeronthePXITRIG1line(forPXIinstruments)ortheVXITTL1line(forVXIinstruments).PXITRIG2orVXITTL2—WaitsuntilitreceivesatriggeronthePXITRIG2line(forPXIinstruments)ortheVXITTL2line(forVXIinstruments).PXITRIG3orVXITTL3—WaitsuntilitreceivesatriggeronthePXITRIG3line(forPXIinstruments)ortheVXITTL3line

(forVXIinstruments).PXITRIG4orVXITTL4—WaitsuntilitreceivesatriggeronthePXITRIG4line(forPXIinstruments)ortheVXITTL4line(forVXIinstruments).PXITRIG5orVXITTL5—WaitsuntilitreceivesatriggeronthePXITRIG5line(forPXIinstruments)ortheVXITTL5line(forVXIinstruments).PXITRIG6orVXITTL6—WaitsuntilitreceivesatriggeronthePXITRIG6line(forPXIinstruments)ortheVXITTL6line(forVXIinstruments).PXITRIG7orVXITTL7—WaitsuntilitreceivesatriggeronthePXITRIG7line(forPXIinstruments)ortheVXITTL7line(forVXIinstruments).ECL0—WaitsuntilitreceivesatriggerontheVXIECL0line.ECL1—WaitsuntilitreceivesatriggerontheVXIECL1line.PXIStar—WaitsuntilitreceivesatriggeronthePXISTARtriggerbus.RTSI0—WaitsuntilitreceivesatriggeronRTSIline0.RTSI1—WaitsuntilitreceivesatriggeronRTSIline1.RTSI2—WaitsuntilitreceivesatriggeronRTSIline2.RTSI3—WaitsuntilitreceivesatriggeronRTSIline3.RTSI4—Waitsuntilitreceivesa

triggeronRTSIline4.RTSI5—WaitsuntilitreceivesatriggeronRTSIline5.RTSI6—WaitsuntilitreceivesatriggeronRTSIline6.

ExecutionControl

Containsthefollowingexecutioncontroloptions:Startthisstepafter—Makesthestepwaituntilanotherstephasstartedbeforeexecuting.Youcanmakethestepwaitonanyotherhardwarestepintheprojectbyselectingthesteptowaitonfromthepull-downmenu.

Youcanusethisoptiontoforceanacquisitiondevicetostartafteragenerationdevicestarts.Youalsocanusethisoptiontoensurethatadevicegeneratingatriggersignalstartsafterthedevicereceivingthesignal,whichavoidssendingthesignalbeforethereceiverisready.Steptowaitfor—Liststhepossiblestepsforwhichthisstepcanwait.Pre-executiondelay(ms)—Specifiestheamountoftimetowaitbeforethestepexecutes.Ifyouconfigurethesteptostartafteranotherstep,thedelayrepresentstheamountoftimetowaitafterthespecifiedstepstarts.Post-executiondelay(ms)—Specifiestheamountoftimetowaitafterthestepexecutes.

CreateSignalsUsetheCreateSignalsstepstocreatedifferenttypesofstandardperiodicsignals,noise,multi-tone,orDCsignals.

Toviewrelatedtopics,clicktheLocatebutton,shownatleft,inthetoolbaratthetopofthiswindow.TheLabVIEWSignalExpressHelphighlightsthistopicintheContentstabsoyoucannavigatetherelatedtopics.

CreateAnalogSignalCreatesananalogsignal.Youcancreatevariousperiodicwaveformsignalsaswellasnoise,multi-tone,orDCsignals.Youalsocanuseaformulatodefineasignal.UseCreateAnalogSignaltocreatearbitrarysignals.Forexample,youcanuseCreateAnalogSignaltocreateasignaltouseasastimulusforahardwaredevice.CreateAnalogSignalcanrunincontinuoussignalmodeorrepeatedsignalmode,dependingonwhetheryouplaceacheckmarkintheRepeatedsignalcheckbox.Thedefaultiscontinuoussignalmode.Details

Parameter DescriptionOutputSignal Displaysthesignalthestepcreates.Configuration Containsthefollowingoptions:

SignalCalculationSetup—Containsoptionsyoucanusetoconfigurehowthestepcalculatesthesignal.TheoptionsthatappearinthissectiondependontheSignaltypeyouspecify.Containsthefollowingoptions:

Signaltype—SpecifiesthetypeofsignalCreateAnalogSignalcreates.Youcanselectfromthefollowingoptions:

SineWave—(Default)Createsasinewavewithadefaultamplitudeandfrequencyof1.TriangleWave—Createsatrianglewavewithadefaultamplitudeandfrequencyof1.SquareWave—Createsasquarewavewithadefaultamplitudeandfrequencyof1.SawtoothWave—Createsasawtoothwavewithadefaultamplitudeandfrequencyof1.DCSignal—CreatesaDCsignalwithadefaultoffsetof0V.

NoiseSignal—Createsanoisesignalwithadefaultlevelof1.UsetheNoisetypefieldtospecifyGaussian,rectangular,ortriangularamplitudedistribution.Multi-tone—Createsamulti-tonesignalwithadefaultstartfrequencyandamplitudeof1andadefaultstopfrequencyof2.Multi-tonesignalsallowthefastandefficientstimulusofasystemacrossanarbitrarybandoffrequencies,andyoucanusethemtodeterminethefrequencyresponseofadevice.Formula—CreatesasignalaccordingtotheformulayouenterintheFormulafield.

Frequency(Hz)—[Signaltype:SineWave,TriangleWave,SquareWave,SawtoothWave,Formula]Specifiesthefrequencyofasine,triangle,square,orsawtoothwaveinhertzorthevalueoffifyouselecttheFormulasignaltype.Thedefaultis1.0kHz.Amplitude(V)—[Signaltype:SineWave,TriangleWave,SquareWave,SawtoothWave,Formula]Specifiestheamplitudeofasine,triangle,square,orsawtoothwaveorthevalueofaifyouselecttheFormulasignaltype.Thedefaultis1.0V.Phase(deg.)—[Signaltype:SineWave,TriangleWave,SquareWave,SawtoothWave]Specifiestheinitialphaseofasine,triangle,square,orsawtoothwaveindegrees.Thedefaultis0degrees.Offset(V)—SpecifiestheDCoffsetof

thesignal.Thedefaultis0V.Repeatedsignal—Specifiesifthecreatedsignalisrepeatedorcontinuous.Ifyouplaceacheckmarkinthischeckbox,CreateAnalogSignalcalculatesthesignalonlyduringthefirstiterationofthestepafteryouclicktheRunbuttonortheResetSignalbuttonandeachtimeyouchangeaconfigurationparameter.Thesignalthenrepeatswiththesametimestampandstartphase.Nperiods—[Signaltype:SineWave,TriangleWave,SquareWave,SawtoothWave]Forcesthenumberofperiodsinthesignaltobeaninteger.IfyouselectthisoptionandchangethevaluesofSamplerate(S/s)orBlocksize(samples),CreateAnalogSignalcoercesthevalueofFrequency(Hz)sothatthenumberofperiodsremainsaninteger.Dutycycle(%)—[Signaltype:SquareWave]Specifiesthepercentageofeachperiodasquarewaveremainshigh.Noisetype—[Signaltype:NoiseSignal]Specifiesthetypeofnoisetheprobabilitydensityfunctionrepresents.CreateAnalogSignaldefinestheNoisetypebythedistributionoffrequenciesthatappearonahistogramofthesignal.

White(Gaussian)—(Default)CreatesanoisesignalwithaGaussiandistributionoffrequencies.White(Rectangular)—Createsanoisesignalwitharectangulardistributionoffrequencies.

White(Triangular)—Createsanoisesignalwithatriangulardistributionoffrequencies.

Level(Vrms)—[Signaltype:NoiseSignal]Specifiesthenoiselevel.Thedefaultis1V_rms.ThisoptionisavailableonlywhenyouselectWhite(Gaussian)astheNoisetype.Startfreq.(Hz)—[Signaltype:Multi-tone]Specifiesthestartfrequencyofthemulti-tonesignal.ThisstepcoercesthestartfrequencytobeamultipleofthefrequencyresolutiondefinedbytheratiooftheSamplerate(S/s)dividedbytheBlocksize(samples).Stopfreq.(Hz)—[Signaltype:Multi-tone]Specifiesthestopfrequencyofthemulti-tonesignal.ThisstepcoercesthestopfrequencytoequalStartfreq.(Hz)+n*Stepfreq.(Hz),wherenisanintegernumber.Stepfreq.(Hz)—[Signaltype:Multi-tone]Specifiesthestepfrequencyofthemulti-tonesignal.ThisstepcoercesthestepfrequencytobeamultipleofthefrequencyresolutiondefinedbytheratiooftheSamplerate(S/s)dividedbytheBlocksize(samples).Formula—[Signaltype:Formula]Specifiestheformulastringthatdefinesthesignal.Thedefaultisa*sin(w*t).Youcanusethefollowingdefinedvariablenames:

f—FrequencyequaltotheFrequency(Hz)input.a—AmplitudeequaltotheAmplitude(V)input.

w—2*pi*f.n—Currentnumberofsamplesgenerated.t—Numberofelapsedseconds.fs—SamplingfrequencyequaltotheSamplerate(S/s).

SamplingConditions—Containsthefollowingoptions:

Samplerate(S/s)—Specifiesthesamplingrateofthesignalinsamplespersecond.Thedefaultis100kS/s.Blocksize(samples)—Specifiesthenumberofsamplesinthesignal.Thedefaultis1000samples.

OptionalOutputs—Containsthefollowingoption:

Exportcoercedvalues—Exportscoercedfrequencyvaluesasoutputscalarvalues.CreateAnalogSignalcancoercefrequencyvalueswhenyouselectaperiodicsignaltypeandyouplaceacheckmarkintheNperiodscheckbox,orwhenyouselectamulti-tonesignaltype.

ExecutionControl

Containsthefollowingoption:Post-executiondelay(ms)—Specifiestheamountoftimetowaitafterthestepexecutes.

CreateAnalogSignalDetailsIncontinuoussignalmode,thesignalthatCreateAnalogSignalcreatesateachiterationiscontiguoustothepreviousiteration.Theresultisasignalwithacontinuouslyincreasingtimestampandphasecontinuity.Youcanusethecontinuoussignalmodetocontinuouslygenerateasignalwitharbitraryfrequencyoranon-repetitivenoisesignalwithananalogoutputdeviceifthedevicesupportsupdatingtheoutputbufferwhilerunning.Inrepeatedsignalmode,thisstepcalculatesthesignalonlyduringthefirstiterationofthestepafteryouclicktheRunbuttonor,inLabVIEWSignalExpress,theResetSignalbuttonandeachtimeyouchangeaconfigurationparameter.Thesignalthenrepeatswiththesametimestampandstartphase.NationalInstrumentsrecommendsthatyouuserepeatedsignalmodeifyougeneratethesignalwithananalogoutputdevicethatdoesnotsupportupdatingtheoutputbufferwhilerunning,suchasthedevicesthatNI-FGENArbitraryWaveformsupports.SignalFrequencyCoercionIfyouselectastandardperiodicsignaltype,youcanplaceacheckmarkintheNperiodscheckboxtocoercethesignalfrequencyyouspecifysothatCreateAnalogSignalcreatesasignalwithanintegernumberofperiods.Theperiodsrepeatwithoutphasediscontinuities.IfyouplaceacheckmarkintheNperiodscheckbox,theactualcoercedvaluesoverwritetheinputvalueyoutype.Whenyouselectamulti-tonesignaltype,CreateAnalogSignalcoercestheStartfreq.(Hz),Stopfreq.(Hz),andStepfreq.(Hz)valuestocreatearepeatablesignal.PlaceacheckmarkintheExportcoercedvaluescheckboxtoexportcoercedfrequencyvaluesasanoutputofCreateAnalogSignal.

CreateDigitalSignalCreatesdifferenttypesofdigitalsignals.DependingontheoptionyouselectintheSignaltypepull-downmenu,thisstepcancreatearamp,marchingvalues,singlevalue,random,ortogglepattern.

Parameter DescriptionOutputSignal Displaysthesignalthestepcreates.Configuration Containsthefollowingoptions:

Signaltype—Specifiesthetypeofdigitalwaveformtocreate.Youcanselectfromthefollowingoptions:

Ramp—Createsadigitalwaveformthatcontainsabinarycount-uppatternthatstartsatzeroandcountsupbyoneuntilitreaches2n–1,wheren=Numberofsignals.MarchingValues—Createsadigitalwaveforminwhichabinaryvalueplacedonthefirstsignalofthefirstsampleislogicallyshiftedtothenextsignaloneachsubsequentsampleofthewaveform.TheHoldvaluefieldspecifiestheinitialvalue,andtheMarchingvaluefieldspecifieshowthevalueshiftsforsubsequentsamples.SingleValue—Createsadigitalwaveforminwhichallbitsaresetto0,1,Z,L,H,X,T,orV,dependingontheValueyouspecify.Random—Createsadigitalwaveformthatcontainsarandomdigitalpatternof0sand1s.Therandompatterngeneratedassumesnomathematicallydeterminablesequenceofvalues.Toggle—Createsadigitalwaveforminwhichtheevennumberedsamples

containbinaryvaluesyoudefineintheTogglevalue1fieldandtheoddnumberedsamplescontainbinaryvaluesyoudefineintheTogglevalue2field.

Holdvalue—Specifiesthebinaryvalueofthegenerateddigitalwaveform.ThisoptionisonlyavailablewhenyouselecttheMarchingValuesoptionfromtheSignaltypepull-downmenu.Marchingvalue—Specifiesthebinaryvaluethatmarchesacrossthesignalsofthegenerateddigitalwaveform.ThisoptionisonlyavailablewhenyouselecttheMarchingValuesoptionfromtheSignaltypepull-downmenu.Value—Specifiesthedigitalbitstateofthegenerateddigitalwaveform.ThisoptionisavailableonlywhenyouselecttheSignalValueoptionfromtheSignaltypepull-downmenu.Togglevalue1—Specifiesthefirstdigitalbitstateofthegenerateddigitalwaveform.ThisoptionisavailablewhenyouselecttheToggleoptionfromtheSignaltypepull-downmenu.Togglevalue2—Specifiestheseconddigitalbitstateofthegenerateddigitalwaveform.ThisoptionisavailablewhenyouselecttheToggleoptionfromtheSignaltypepull-downmenu.Createoneoutputpersignal—Specifieswhethertocreateanoutputgroupthatcontainsaseparatesignalforeachlineinthedigitalwaveform.Numberofsignals—Specifiesthenumberofsignalstoincludeinthegenerateddigitalwaveform.Blocksize(samples)—Specifiesthenumberofsamplesinthesignal.Thedefaultis1000samples.Samplerate(S/s)—Specifiesthesamplingrateofthesignalinsamplespersecond.Thedefault

is100kS/s.

ExecutionControl

Containsthefollowingoption:Post-executiondelay(ms)—Specifiestheamountoftimetowaitafterthestepexecutes.

SignalNames

Containsthefollowingoptions:Signalnamestable—Specifiescustomnamesforthedigitalsignalsthisstepcreates.Resettodefault—Resetsanymodifieddigitalsignalnamestoitsdefaultname.

Load/SaveSignalsUsetheLoad/SaveSignalsstepstoimportorexportdatafromASCIIandLVMfiles;andimportdatafromSPICEfiles.

Toviewrelatedtopics,clicktheLocatebutton,shownatleft,inthetoolbaratthetopofthiswindow.TheLabVIEWSignalExpressHelphighlightsthistopicintheContentstabsoyoucannavigatetherelatedtopics.

LoadfromASCII(FrequencyDomain)ImportsdatafromanASCIIfile.

Parameter DescriptionImportedSignal

DisplaysthesignalimportedfromanASCIIfile.

ParseFile Containsthefollowingoptions:Importfilepath—Specifiesthenameandlocationofthefileyouwanttoimport.Youcanspecifyanabsoluteorrelativepathtothefile.Ifyouspecifyanabsolutepath,thisstepsavesthepathwiththeproject.Ifyouspecifyarelativepathandyoudonotsavetheproject,thisstepassumesthepathisrelativetotheMyDocumentsfolder.Ifyouspecifyarelativepathandyousavetheproject,thepathisrelativetothelocationwhereyousavetheproject.Filepreview—Displaysapreviewofthecontentsofthefiletohelpyoudeterminehowtoparsetheparameters.Bydefault,Filepreviewdisplaysthefirst50rowsfromthefile.IfyouincreasethevalueinStartrow,Filepreviewdisplays50rowsbeginningwiththerowyouspecifyinStartrow.Youcanresizethecolumnheadertoshowmoreorlessofthecolumn.FileParsingSettings—Containsthefollowingoptions:

Delimiter—Specifiesthedelimitertousetoseparatedata.ThedefaultisTab.ThisoptionappearsonlyifyousetExportfiletypetoGenericASCII(.txt).CustomDelimiter—Specifiesafiledelimiterotherthanataboracomma.ThisoptionappearsonlyifyousetExportfiletypetoGenericASCII(.txt).Startrow—Specifiestherowfromwhichtobegindisplayingdata.Thedefaultis1.

Endrow—Specifiesthelastrowtodisplaydata.Thedefaultis–1,whichspecifiestodisplayalldata.Signalnamesprecededatarow—Specifiesthatthefirstrowofthefilecontainsthesignalnames.Decimalpoint—Specifieswhichcharactertouseasthedecimalpoint.Thedefaultis.(dot).Domain—Specifiesthedatatypeoftheoutputsignal.

ImportSignals

Containsthefollowingoptions:Signals—ListsthesignalsinthefileandspecifieswhichsignaltheImportedSignalgraphdisplays.Import—SpecifieswhethertoimporttheselectedsignalfromthefileyouspecifyinImportfilepath.IfyouplaceacheckmarkinoneoftheImportcheckboxes,LabVIEWSignalExpressexportsthatsignaltotheProjectView.YoucanthensendthatsignaltoanothersteporplotitontheDataView.ResamplingSetup—Containsthefollowingoptions:

NoteWhenyouselectaninputchannelasyourXvalueandspecifyyourowndf,LabVIEWSignalExpressresamplesthewaveformaccordingtothenewdfandbasedontheselectedXvalues.Thismaychangethenumberofdatapointsintheoutputwaveform.InputXvalues—SpecifiestheXdatatouseforresampling.OptionsincludeNone(default)orPointIndex.Interpolationmode—Specifiestheinterpolationmethod.OptionsincludeCoerce,Linear,orSpline.ThedefaultisCoerce.Userspecifieddf—Specifiestheinterval

sizethatrepresentsthesamplingstepsizetousetoobtaindata.Usesamedf—SpecifieswhethertousethesamedfforallSignals.Whenyouplaceacheckmarkinthischeckbox,LoadfromASCIIappliesthedfofthecurrentlyselectedsignaltoallSignals.SelectthisoptiontogrouptheimportedSignalsintooneoutput.SignalType—Definesthetypeoffrequencysignal.Optionsinclude:Magnitude-linear,Magnitude-dB,Phase-degrees,orPhase-radians.

LoadfromASCII(TimeDomain)ImportsdatafromanASCIIfile.

Parameter DescriptionImportedSignal

DisplaysthesignalimportedfromanASCIIfile.

ParseFile Containsthefollowingoptions:Importfilepath—Specifiesthenameandlocationofthefileyouwanttoimport.Youcanspecifyanabsoluteorrelativepathtothefile.Ifyouspecifyanabsolutepath,thisstepsavesthepathwiththeproject.Ifyouspecifyarelativepathandyoudonotsavetheproject,thisstepassumesthepathisrelativetotheMyDocumentsfolder.Ifyouspecifyarelativepathandyousavetheproject,thepathisrelativetothelocationwhereyousavetheproject.Filepreview—Displaysapreviewofthecontentsofthefiletohelpyoudeterminehowtoparsetheparameters.Bydefault,Filepreviewdisplaysthefirst50rowsfromthefile.IfyouincreasethevalueinStartrow,Filepreviewdisplays50rowsbeginningwiththerowyouspecifyinStartrow.Youcanresizethecolumnheadertoshowmoreorlessofthecolumn.FileParsingSettings—Containsthefollowingoptions:

Delimiter—Specifiesthedelimitertousetoseparatedata.ThedefaultisTab.ThisoptionappearsonlyifyousetExportfiletypetoGenericASCII(.txt).CustomDelimiter—Specifiesafiledelimiterotherthanataboracomma.ThisoptionappearsonlyifyousetExportfiletypetoGenericASCII(.txt).Startrow—Specifiestherowfromwhichtobegindisplayingdata.Thedefaultis1.

Endrow—Specifiesthelastrowtodisplaydata.Thedefaultis–1,whichspecifiestodisplayalldata.Signalnamesprecededatarow—Specifiesthatthefirstrowofthefilecontainsthesignalnames.Decimalpoint—Specifieswhichcharactertouseasthedecimalpoint.Thedefaultis.(dot).Domain—Specifiesthedatatypeoftheoutputsignal.

ImportSignals

Containsthefollowingoptions:Signals—ListsthesignalsinthefileandspecifieswhichsignaltheImportedSignalgraphdisplays.Import—SpecifieswhethertoimporttheselectedsignalfromthefileyouspecifyinImportfilepath.IfyouplaceacheckmarkinoneoftheImportcheckboxes,LabVIEWSignalExpressexportsthatsignaltotheProjectView.YoucanthensendthatsignaltoanothersteporplotitontheDataView.ResamplingSetup—Containsthefollowingoptions:

NoteWhenyouselectaninputchannelasyourXvalueandspecifyyourowndt,LabVIEWSignalExpressresamplesthewaveformaccordingtothenewdtandbasedontheselectedXvalues.Thismaychangethenumberofdatapointsintheoutputwaveform.InputXvalues—SpecifiestheXdatatouseforresampling.OptionsincludeNone(default)orPointIndex.Interpolationmode—Specifiestheinterpolationmethod.OptionsincludeCoerce,Linear,orSpline.ThedefaultisCoerce.Userspecifieddt—Specifiestheinterval

sizethatrepresentsthesamplingstepsizetousetoobtaindata.Usesamedt—IndicateswhethertousethesamedtforallSignals.Whenyouplaceacheckmarkinthischeckbox,LoadfromASCIIappliesthedtofthecurrentlyselectedsignaltoallSignals.SelectthisoptiontogrouptheimportedSignalsintooneoutput.

Yaxisunit—Specifiestheunittypefortheinputsignal.SelectingUnitlessspecifiestonotassociateanyunitwiththeinputsignal.SelectingCustomspecifiesthattheinputsignalcontainsanassociatedunitwithinthedata.Xaxisunit—Specifiestheunittypefortheinputsignal.SelectingUnitlessspecifiestonotassociateanyunitwiththeinputsignal.SelectingCustomspecifiesthattheinputsignalcontainsanassociatedunitwithinthedata.

LoadfromLVM(FrequencyDomain)Importsdatafromatext-basedmeasurementfile(.lvm).

Parameter DescriptionImportedSignal

Displaysthesignalimportedfromthe.lvmfile.

FileandSignalSelection

Containsthefollowingoptions:Importfilepath—Specifiesthenameandlocationofthefileyouwanttoimport.Youcanspecifyanabsoluteorrelativepathtothefile.Ifyouspecifyanabsolutepath,thisstepsavesthepathwiththeproject.Ifyouspecifyarelativepathandyoudonotsavetheproject,thisstepassumesthepathisrelativetotheMyDocumentsfolder.Ifyouspecifyarelativepathandyousavetheproject,thepathisrelativetothelocationwhereyousavetheproject.Signals—ListsthesignalsinthefileandspecifieswhichsignaltheImportedSignalgraphdisplays.Import—SpecifieswhethertoimporttheselectedsignalfromthefileyouspecifyinImportfilepath.IfyouplaceacheckmarkinoneoftheImportcheckboxes,LabVIEWSignalExpressexportsthatsignaltotheProjectView.YoucanthensendthatsignaltoanothersteporplotitontheDataView.FileInformation—Containsthefollowingoptions:

ID—Containsthefollowingoptions:Project—Displaysthenameoftheprojectassociatedwiththisdataset.User—Displaystheidentityoftheuserwhosavedthisdata.Savedate—Indicatesthedatewhenthedatawassaved.Savetime—Indicatesthetimewhenthedatawassaved.

Notes—Specifiesmiscellaneousinformationrelatedtothesaveddata.

UUT—Containsthefollowingoptions:UUTnameordescription—Specifiesthenameand/ordescriptionoftheUnitUnderTest(UUT).Serialnumber—SpecifiestheserialnumberoftheUUT.Modelnumber—SpecifiesthemodelnumberoftheUUT.

Test—Specifiestestinginformationtoaddtotheheader.Containsthefollowingoptions:

Testnameordescription—Specifiesthenameand/ordescriptionofthetest.Series—Specifiesthetestseriesofthisdata.Numbers—Specifiesthenumbersinthetestseriestowhichthisdatacorresponds.

Waveform—Displaysinformationaboutthewaveform.

Waveformname—Specifiesthenameofthechannelyouselect.Waveformnotes—Specifiesmiscellaneousinformationassociatedwiththechannelyouselect.

Domain—Specifiesthedatatypeoftheoutputsignal.ThedefaultisFrequencyWaveform.SignalType—Definesthetypeoffrequencysignal.Optionsinclude:Magnitude-linear,Magnitude-dB,Phase-degrees,orPhase-radians.

LoadfromLVM(TimeDomain)Importsdatafromatext-basedmeasurementfile(.lvm).

Parameter DescriptionImportedSignal

Displaysthesignalimportedfromthe.lvmfile.

FileandSignalSelection

Containsthefollowingoptions:Importfilepath—Specifiesthenameandlocationofthefileyouwanttoimport.Youcanspecifyanabsoluteorrelativepathtothefile.Ifyouspecifyanabsolutepath,thisstepsavesthepathwiththeproject.Ifyouspecifyarelativepathandyoudonotsavetheproject,thisstepassumesthepathisrelativetotheMyDocumentsfolder.Ifyouspecifyarelativepathandyousavetheproject,thepathisrelativetothelocationwhereyousavetheproject.Signals—ListsthesignalsinthefileandspecifieswhichsignaltheImportedSignalgraphdisplays.Import—SpecifieswhethertoimporttheselectedsignalfromthefileyouspecifyinImportfilepath.IfyouplaceacheckmarkinoneoftheImportcheckboxes,LabVIEWSignalExpressexportsthatsignaltotheProjectView.YoucanthensendthatsignaltoanothersteporplotitontheDataView.FileInformation—Containsthefollowingoptions:

ID—Containsthefollowingoptions:Project—Displaysthenameoftheprojectassociatedwiththisdataset.User—Displaystheidentityoftheuserwhosavedthisdata.Savedate—Indicatesthedatewhenthedatawassaved.Savetime—Indicatesthetimewhenthedatawassaved.

Notes—Specifiesmiscellaneousinformationrelatedtothesaveddata.

UUT—Containsthefollowingoptions:UUTnameordescription—Specifiesthenameand/ordescriptionoftheUnitUnderTest(UUT).Serialnumber—SpecifiestheserialnumberoftheUUT.Modelnumber—SpecifiesthemodelnumberoftheUUT.

Test—Specifiestestinginformationtoaddtotheheader.Containsthefollowingoptions:

Testnameordescription—Specifiesthenameand/ordescriptionofthetest.Series—Specifiesthetestseriesofthisdata.Numbers—Specifiesthenumbersinthetestseriestowhichthisdatacorresponds.

Waveform—Displaysinformationaboutthewaveform.

Waveformname—Specifiesthenameofthechannelyouselect.Waveformnotes—Specifiesmiscellaneousinformationassociatedwiththechannelyouselect.

Domain—Specifiesthedatatypeoftheoutputsignal.Yaxisunit—Specifiestheunittypefortheinputsignal.SelectingUnitlessspecifiestonotassociateanyunitwiththeinputsignal.SelectingCustomspecifiesthattheinputsignalcontainsanassociatedunitwithinthedata.Xaxisunit—Specifiestheunittypefortheinputsignal.SelectingUnitlessspecifiestonotassociate

anyunitwiththeinputsignal.SelectingCustomspecifiesthattheinputsignalcontainsanassociatedunitwithinthedata.

LoadfromSPICE(FrequencyDomainXY)ImportsdatafromaSPICE,PSpice,orMultisimfile.SPICEisageneral-purposecircuitsimulationprogramfornonlinearDC,nonlineartransient,andlinearACanalyses.PSpiceisSPICEforWindowsandispartoftheOrCAD®productlinebyCadenceDesignSystemsInc.MultisimisanintegrateddesktopdesignentryandsimulationsystemfordesignengineerscreatedbyElectronicsWorkbench.

Parameter DescriptionImportedSignal

DisplaysthesignalyouimportedfromaSPICE,PSpice,orMultisimfile.

FileandSignalSelection

Containsthefollowingoptions:Simulationfiletype—Specifiesthetypeoffiletoimport.OptionsincludeSPICE,PSpice,andMultisim.ThedefaultisSPICE.Importfilepath—Specifiesthenameandlocationofthefileyouwanttoimport.Youcanspecifyanabsoluteorrelativepathtothefile.Ifyouspecifyanabsolutepath,thisstepsavesthepathwiththeproject.Ifyouspecifyarelativepathandyoudonotsavetheproject,thisstepassumesthepathisrelativetotheMyDocumentsfolder.Ifyouspecifyarelativepathandyousavetheproject,thepathisrelativetothelocationwhereyousavetheproject.Signalsinfile—ListsthesignalsinthefileandspecifieswhichsignaltheImportedSignalgraphdisplays.Import—SpecifieswhethertoimporttheselectedsignalfromthefileyouspecifyinImportfilepath.IfyouplaceacheckmarkinoneoftheImportcheckboxes,LabVIEWSignalExpressexportsthatsignaltotheProjectView.YoucanthensendthatsignaltoanothersteporplotitontheDataView.SignalType—Definesthetypeoffrequencysignal.Optionsinclude:Magnitude-linear,Magnitude-dB,

Phase-degrees,orPhase-radians.Domain—Specifiesthedatatypeoftheoutputsignal.ThedefaultisXYPairs-Frequency.Magnitude—SpecifiesthedatatypeoftheoutputsignalasLinearordB.Thisoptionisavailableonlywhenthefileyouimportcontainscomplexsignalsthatincluderealandimaginarycomponents.Phase—Specifiesthedatatypeoftheoutputsignalasdegreesorradians.Thisoptionisavailableonlywhenthefileyouimportcontainscomplexsignalsthatincluderealandimaginarycomponents.

LoadfromSPICE(FrequencyDomain)ImportsdatafromaSPICE,PSpice,orMultisimfile.SPICEisageneral-purposecircuitsimulationprogramfornonlinearDC,nonlineartransient,andlinearACanalyses.PSpiceisSPICEforWindowsandispartoftheOrCAD®productlinebyCadenceDesignSystemsInc.MultisimisanintegrateddesktopdesignentryandsimulationsystemfordesignengineerscreatedbyElectronicsWorkbench.

Parameter DescriptionImportedSignal

DisplaysthesignalyouimportedfromaSPICE,PSpice,orMultisimfile.

FileandSignalSelection

Containsthefollowingoptions:Simulationfiletype—Specifiesthetypeoffiletoimport.OptionsincludeSPICE,PSpice,andMultisim.ThedefaultisSPICE.Importfilepath—Specifiesthenameandlocationofthefileyouwanttoimport.Youcanspecifyanabsoluteorrelativepathtothefile.Ifyouspecifyanabsolutepath,thisstepsavesthepathwiththeproject.Ifyouspecifyarelativepathandyoudonotsavetheproject,thisstepassumesthepathisrelativetotheMyDocumentsfolder.Ifyouspecifyarelativepathandyousavetheproject,thepathisrelativetothelocationwhereyousavetheproject.Signalsinfile—ListsthesignalsinthefileandspecifieswhichsignaltheImportedSignalgraphdisplays.Import—SpecifieswhethertoimporttheselectedsignalfromthefileyouspecifyinImportfilepath.IfyouplaceacheckmarkinoneoftheImportcheckboxes,LabVIEWSignalExpressexportsthatsignaltotheProjectView.YoucanthensendthatsignaltoanothersteporplotitontheDataView.ResamplingSetup—Containsthefollowingoptions:

Interpolationmode—Specifiesthe

interpolationmethod.OptionsincludeCoerce,Linear,orSpline.ThedefaultisCoerce.df—Specifiesthedf.Thedefaultis1.SignalType—Definesthetypeoffrequencysignal.Optionsinclude:Magnitude-linear,Magnitude-dB,Phase-degrees,orPhase-radians.Magnitude—SpecifiesthedatatypeoftheoutputsignalasLinearordB.Thisoptionisavailableonlywhenthefileyouimportcontainscomplexsignalsthatincluderealandimaginarycomponents.Phase—Specifiesthedatatypeoftheoutputsignalasdegreesorradians.Thisoptionisavailableonlywhenthefileyouimportcontainscomplexsignalsthatincluderealandimaginarycomponents.

Domain—Specifiesthedatatypeoftheoutputsignal.ThedefaultisFrequencyWaveform.

LoadfromSPICE(TimeDomainXY)ImportsdatafromaSPICE,PSpice,orMultisimfile.SPICEisageneral-purposecircuitsimulationprogramfornonlinearDC,nonlineartransient,andlinearACanalyses.PSpiceisSPICEforWindowsandispartoftheOrCAD®productlinebyCadenceDesignSystemsInc.MultisimisanintegrateddesktopdesignentryandsimulationsystemfordesignengineerscreatedbyElectronicsWorkbench.

Parameter DescriptionImportedSignal

DisplaysthesignalyouimportedfromaSPICE,PSpice,orMultisimfile.

FileandSignalSelection

Containsthefollowingoptions:Simulationfiletype—Specifiesthetypeoffiletoimport.OptionsincludeSPICE,PSpice,andMultisim.ThedefaultisSPICE.Importfilepath—Specifiesthenameandlocationofthefileyouwanttoimport.Youcanspecifyanabsoluteorrelativepathtothefile.Ifyouspecifyanabsolutepath,thisstepsavesthepathwiththeproject.Ifyouspecifyarelativepathandyoudonotsavetheproject,thisstepassumesthepathisrelativetotheMyDocumentsfolder.Ifyouspecifyarelativepathandyousavetheproject,thepathisrelativetothelocationwhereyousavetheproject.Signalsinfile—ListsthesignalsinthefileandspecifieswhichsignaltheImportedSignalgraphdisplays.Import—SpecifieswhethertoimporttheselectedsignalfromthefileyouspecifyinImportfilepath.IfyouplaceacheckmarkinoneoftheImportcheckboxes,LabVIEWSignalExpressexportsthatsignaltotheProjectView.YoucanthensendthatsignaltoanothersteporplotitontheDataView.Domain—Specifiesthedatatypeoftheoutputsignal.ThedefaultisXYPairs-Time.

Yaxisunit—Specifiestheunittypefortheinputsignal.SelectingUnitlessspecifiestonotassociateanyunitwiththeinputsignal.SelectingCustomspecifiesthattheinputsignalcontainsanassociatedunitwithinthedata.Xaxisunit—Specifiestheunittypefortheinputsignal.SelectingUnitlessspecifiestonotassociateanyunitwiththeinputsignal.SelectingCustomspecifiesthattheinputsignalcontainsanassociatedunitwithinthedata.

LoadfromSPICE(TimeDomain)ImportsdatafromaSPICE,PSpice,orMultisimfile.SPICEisageneral-purposecircuitsimulationprogramfornonlinearDC,nonlineartransient,andlinearACanalyses.PSpiceisSPICEforWindowsandispartoftheOrCAD®productlinebyCadenceDesignSystemsInc.MultisimisanintegrateddesktopdesignentryandsimulationsystemfordesignengineerscreatedbyElectronicsWorkbench.

Parameter DescriptionImportedSignal

DisplaysthesignalyouimportedfromaSPICE,PSpice,orMultisimfile.

FileandSignalSelection

Containsthefollowingoptions:Simulationfiletype—Specifiesthetypeoffiletoimport.OptionsincludeSPICE,PSpice,andMultisim.ThedefaultisSPICE.Importfilepath—Specifiesthenameandlocationofthefileyouwanttoimport.Youcanspecifyanabsoluteorrelativepathtothefile.Ifyouspecifyanabsolutepath,thisstepsavesthepathwiththeproject.Ifyouspecifyarelativepathandyoudonotsavetheproject,thisstepassumesthepathisrelativetotheMyDocumentsfolder.Ifyouspecifyarelativepathandyousavetheproject,thepathisrelativetothelocationwhereyousavetheproject.Signalsinfile—ListsthesignalsinthefileandspecifieswhichsignaltheImportedSignalgraphdisplays.Import—SpecifieswhethertoimporttheselectedsignalfromthefileyouspecifyinImportfilepath.IfyouplaceacheckmarkinoneoftheImportcheckboxes,LabVIEWSignalExpressexportsthatsignaltotheProjectView.YoucanthensendthatsignaltoanothersteporplotitontheDataView.ResamplingSetup—Containsthefollowingoptions:

Interpolationmode—Specifiesthe

interpolationmethod.OptionsincludeCoerce,Linear,orSpline.ThedefaultisCoerce.dt—Specifiesthedt.Thedefaultis1.Y-axis—Specifiestodisplaythey-axisaslinearordB.

Domain—Specifiesthedatatypeoftheoutputsignal.Yaxisunit—Specifiestheunittypefortheinputsignal.SelectingUnitlessspecifiestonotassociateanyunitwiththeinputsignal.SelectingCustomspecifiesthattheinputsignalcontainsanassociatedunitwithinthedata.Xaxisunit—Specifiestheunittypefortheinputsignal.SelectingUnitlessspecifiestonotassociateanyunitwiththeinputsignal.SelectingCustomspecifiesthattheinputsignalcontainsanassociatedunitwithinthedata.

SavetoASCII/LVMSavesasignaltoanASCIIfileoratext-basedmeasurementfile(.lvm).Becausethe.lvmfileformatisdesignedtoneveroverwritetheinitialheaderinformation,SavetoASCII/LVMonlywritestheheaderinformationtothe.lvmfilethefirsttimeyourun.Ifyourunagain,SavetoASCII/LVMdoesnotupdatetheheaderinformation,onlythesubheadinformation.

Parameter DescriptionInputSignals

Displaystheinputsignals.

Signals Containsthefollowingoptions:AddInput—Addsthesignalyouwanttowritetofile.Remove—Removesthehighlightedinput.Inputs—ListsthesignalstowritetotheASCIIfileorthetext-basedmeasurementfile(.lvm).InputData—Specifiesthesignalyouwanttosavetothefile.

FileSettings

Containsthefollowingoptions:Exportfilepath—Specifiesthelocationwhereyouwanttosavethefile.Youcanspecifyanabsoluteorrelativepathtothefile.Ifyouspecifyanabsolutepath,thisstepsavesthepathwiththeproject.Ifyouspecifyarelativepathandyoudonotsavetheproject,thisstepassumesthepathisrelativetotheMyDocumentsfolder.Ifyouspecifyarelativepathandyousavetheproject,thepathisrelativetothelocationwhereyousavetheproject.Iffilealreadyexists—SpecifieshowLabVIEWSignalExpresssavesdatatoanexistingfile.Containsthefollowingoptions:

Overwrite—Replacesdataintheexistingfile.Overwriteonce,thenappendtofile—Overwritesthefileonceandthenappendstoinformationtotheendoftheexistingfile.

Overwriteandbackupprevious—Performsabackupofthefileandreplacesdataintheexistingfile.Appendtofile—Appendsthedatatotheexistingfile.Nextavailablefilename—Appendsthenextsequentialnumbertothefilename.Forexample,iftest.lvmexists,LabVIEWSignalExpresssavesthefileastest1.lvm.

Exportfiletype—Specifiesinwhichfileformattosavethefile.Optionsincludetext-basedmeasurementfile(.lvm)orGenericASCII.Thedefaultistext-basedmeasurementfile(.lvm).IfyouselectGenericASCII,youalsocansaveas.csvor.txt.A.lvmfileformatcontainsheaderinformationandsignaldata.AnASCIIfileformatcontainsonlysignaldata.BothfileformatsareASCII.YoucanusetheLoadfromLVMorLoadfromASCIIstepstoloadthesefilesintoLabVIEWSignalExpress.LVMFileAnnotations—Containsthefollowingoptions:

ID—Containsthefollowingoptions:Project—Displaysthenameoftheprojectassociatedwiththisdataset.User—Displaystheidentityoftheuserwhosavedthisdata.

Notes—Specifiesmiscellaneousinformationassociatedwiththechannelyouselect.UUT—Containsthefollowingoptions:

UUTnameordescription—Specifiesthenameand/ordescriptionoftheUnitUnderTest(UUT).Serialnumber—SpecifiestheserialnumberoftheUUT.Modelnumber—SpecifiesthemodelnumberoftheUUT.

Test—Specifiestestinginformationtoaddtotheheader.Containsthefollowingoptions:

Testnameordescription—Specifiesthenameand/ordescriptionofthetest.Series—Specifiesthetestseriesofthisdata.Numbers—Specifiesthenumbersinthetestseriestowhichthisdatacorresponds.

Waveform—Displaysinformationaboutthewaveform.

Waveformname—Specifiesthenameofthechannelyouselect.Waveformnotes—Specifiesmiscellaneousinformationassociatedwiththechannelyouselect.

Delimiter—Specifiesthedelimitertousetoseparatedata.ThedefaultisTab.ThisoptionappearsonlyifyousetExportfiletypetoGenericASCII(.txt).CustomDelimiter—Specifiesafiledelimiterotherthanataboracomma.ThisoptionappearsonlyifyousetExportfiletypetoGenericASCII(.txt).IncludeSignalNames—IncludesthenamesofthesignalsintheASCIIfile.ThisoptionappearsonlyifyousetExportfiletypetoGenericASCII(.txt).XValueColumns—Containsthefollowingoptions:

Onecolumnperchannel—Createsaseparatecolumnfortimedataeachchannelgenerates.Thisoptionincludesacolumnofvaluesfromthex-axisforeverycolumnofvaluesfromthey-axis.Onecolumnonly—Createsonlyonecolumnforthetimedatathechannelsgenerate.Thisoptionincludesonlyonecolumnofvaluesfromthex-axis.

Emptytimecolumn—Createsanemptycolumnforthetimedataeachchannelgenerates.Thisoptiondoesnotincludethedatafromthex-axis.

ThisoptionappearsonlyifyousetExportfiletypetoGenericASCII(.txt).TimeAxisPreference—Containsthefollowingoptions:

AbsoluteTime—Displaysthetimeelapsedsince12:00a.m.,Friday,January1,1904,UniversalTime.RelativeTime—Displaysthetimeinmillisecondsstartingfrom0.

ThisoptionappearsonlyifyousetExportfiletypetoGenericASCII(.txt).

ProcessingUsetheProcessingstepstofilter,scale,resample,andaveragesignals;applywindowingandperformarithmeticoperations;and,interactivelyaligntwosignals.

Toviewrelatedtopics,clicktheLocatebutton,shownatleft,inthetoolbaratthetopofthiswindow.TheLabVIEWSignalExpressHelphighlightsthistopicintheContentstabsoyoucannavigatetherelatedtopics.

FilterFiltersatimesignalusinganinfiniteimpulseresponse(IIR)orfiniteimpulseresponse(FIR)filter.Usethissteptoremoveorattenuateunwantedfrequenciesfromasignalusingvariousstandardfiltertypesandtopologies.InLabVIEWSignalExpress,theFilterstepfilterstheinputsignalcontinuously.Thestepresetsthesignaltoitsoriginalvaluethefirsttimethestepruns,ifLabVIEWSignalExpressdetectsadiscontinuityintheinputsignal,orifyoupresstheResetFilterbutton.InLabVIEW,theFilterExpressVIfilterstheinputsignalcontinuously.TheExpressVIresetsthesignaltoitsoriginalvaluethefirsttimetheExpressVIruns,ifLabVIEWdetectsadiscontinuityintheinputsignal,oriftheresetinputreceivesaTRUEvalue.Details

Parameter DescriptionInputSignals Displaystheinputsignaltofilter.Autoscaleamplitude

Autoscalesthepreviewgraphalongthey-axis.Thedefaultistoautoscaletheamplitude.

Displayedsignal

Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

OutputSignals

Displaysthefilteredsignal.

Autoscaleamplitude

Autoscalesthepreviewgraphalongthey-axis.Thedefaultistoautoscaletheamplitude.

Input ThefollowingoptionappliestotheLabVIEWSignalExpressstep:

Inputsignal—Specifiestheinputsignaltofilter.

Configuration Containsthefollowingoption:

FilterSpecifications—Containsthefollowingoptions:

Mode—Specifiesthemodeoffiltertouse.Youcanselectfromthefollowingoptions:

IIRfilter—SpecifiesanIIRfilter,whichisarecursivedigitalfilterwithinfiniteimpulseresponse.IIRfiltersoperateoncurrentandpastinputvaluesandcurrentandpastoutputvalues.IIRfilterscanachievethesamelevelofattenuationasFIRfiltersbutwithfewercoefficients.Forthisreason,IIRfilterscanbefasterandmoreefficientthanFIRfilters.FIRfilter—SpecifiesanFIRfilter,whichisadigitalfilterwithfiniteimpulseresponse.FIRfiltersoperateonlyoncurrentandpastinputvalues.BecauseanFIRfilterdoesnotdependonpastoutputs,theimpulseresponsedecaystozeroinafiniteamountoftime.UseFIRfiltersforapplicationsthatrequirelinearphaseresponses.

Type—Specifiesthetypeoffiltertouse.Youcanselectfromthefollowingoptions:

Lowpass—(Default)Passeslowfrequenciesandattenuateshighfrequencies.Highpass—Passeshighfrequenciesandattenuateslowfrequencies.

Bandpass—Passesacertainbandoffrequencies.UsetheLowcutoff(Hz)andtheHighcutoff(Hz)fieldstospecifytheband.Bandstop—Attenuatesacertainbandoffrequencies.UsetheLowcutoff(Hz)andtheHighcutoff(Hz)fieldstospecifytheband.

Topology—[Mode:IIRFilter]SpecifiesthedesigntypeofanIIRfilter.Youcanselectfromthefollowingoptions:

Off—Doesnotfilterthesignal.Butterworth—(Default)AppliesaButterworthfiltertothesignal.Butterworthfiltershaveasmooth,monotonicallydecreasingfrequencyresponse.Chebyshev—AppliesaChebyshevfiltertothesignal.ChebyshevfilterscanachieveasharpertransitionbetweenthepassbandandthestopbandwithalowerorderfilterthanButterworthfilters.InverseChebyshev—AppliesanInverseChebyshevfiltertothesignal.InverseChebyshevfiltersaresimilartoChebyshevfilters,buttheydistributetheerroroverthestopbandinsteadofthepassbandandaremaximallyflatinthepassbandinsteadofthestopband.Elliptic—AppliesanEllipticfiltertothesignal.Ellipticfilters

minimizethepeakerrorbydistributingitoverthepassbandandthestopband.Ellipticfiltersprovidethesharpesttransitionbetweenthepassbandandthestopband.Bessel—AppliesaBesselfiltertothesignal.Besselfiltershavemaximallyflatresponseinbothmagnitudeandphase.YoucanuseBesselfilterstoreducenonlinearphasedistortioninherentinallIIRfilters.

Order—[Mode:IIRfilter]DeterminestheorderofanIIRfilter,whichmustbegreaterthanzero.Thedefaultis2.IncreasingthevalueofOrdercausesthetransitionbetweenthepassbandandthestopbandtobecomesteeper.However,asthevalueofOrderincreases,theprocessingspeedbecomesslower,andthenumberofdistortedpointsatthestartofthesignalincreases.Numberoftaps—[Mode:FIRfilter]SpecifiesthetotalnumberofFIRcoefficients,whichmustbegreaterthanzero.Thedefaultis49.Increasingthevalueoftapscausesthetransitionbetweenthepassbandandthestopbandtobecomesteeper.However,asthevalueofNumberoftapsincreases,theprocessingspeedbecomesslower.Cutoff(Hz)—[Type:Lowpass,Highpass]SpecifiesthecutofffrequencyofthefilterwhenyouselectaLowpassorHighpassfiltertype.Thedefaultis100Hz.Lowcutoff(Hz)—[Type:Bandpass,

Bandstop]SpecifiesthelowercutofffrequencywhenyouselectaBandpassorBandstopfiltertype.Thedefaultis100Hz.Highcutoff(Hz)—[Type:Bandpass,Bandstop]SpecifiesthehighercutofffrequencywhenyouselectaBandpassorBandstopfiltertype.Highcutoff(Hz)mustbegreaterthanLowcutoff(Hz)andobservetheNyquistcriterion.Thedefaultis200Hz.FilterMagnitudeResponse(dB)—Displaysthemagnituderesponseofthefilteryouspecify.

FilterDetailsThebestfilterMode,Type,andTopologytousedependsontheanalysisyouwanttoperform.Usethefollowingillustrationasaguidelineforselectingtheappropriatefilterforananalysisproject:

ScalingandConversion(TimeDomain)Performsgainandoffsetscalingonatimesignal,gainscalingonafrequency-domainmagnitudesignal,ortime-delaycorrectiononafrequency-domainphasesignal.

Parameter DescriptionInputSignal Displaystheinputtimesignaltobescaled.

Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

ScaledSignal Displaysthescaledtimesignal.Input Containsthefollowingoption:

Inputsignal—Specifiestheanalogwaveformforthestep.

Configuration Containsthefollowingoption:OperationSetup—Containsthefollowingoptions:

Pre-gainoffset—Specifiestheamountofoffsettoaddtothesignalbeforegain.Thedefaultis0.Gain—Specifiesthemultiplicationfactortoapplytothetimesignal.Thedefaultis1.Post-gainoffset—Specifiestheamountofoffsettoaddtothesignalaftergain.Thedefaultis0.Equivalentdiagram—DisplaystheLabVIEWequivalentblockdiagramofthescalingoperationyouselect.

ScalingandConversion(FrequencyDomain)Performsgainandoffsetscalingonatimesignal,gainscalingonafrequency-domainmagnitudesignal,ortime-delaycorrectiononafrequency-domainphasesignal.

Parameter DescriptionInputSignal Displaystheinputsignal.

Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

ScaledSignal Displaysthescaledsignal.Input Containsthefollowingoption:

Inputsignal—Specifiestheanalogwaveformforthestep.

Configuration Containsthefollowingoption:OperationSetup—Containsthefollowingoptions:

Gain—Specifiesthegaintoapplytothesignal.Gainrepresentation—Specifiesifthegainvalueisrepresentedindecibels.Equivalentdiagram—DisplaystheLabVIEWequivalentblockdiagramofthescalingoperationyouselect.Correctiondelay—Specifiesthedelayvaluetousetocorrectthephasesignal.Outputindegrees—Specifiesifthescaledphasesignalisrepresentedinradianorindegrees.Unwrapphase—Specifiesifthephase

oftheoutputsignalisunwrapped.

SubsetandResample(FrequencyDomain)ExtractsasubsetofaninputsignalusingtheStartfrequencyandSubsetlengthyouspecifyorresamplesaninputsignalusingthefrequencyinterval(df)youspecify.Ifyouspecifyalargerdf,SubsetandResampledownsamplesthesignal.Ifyouspecifyasmallerdf,SubsetandResampleupsamplesthesignal.

Parameter DescriptionInputSignal Displaystheinputfrequency-domainsignaltobescaled.

Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

ProcessedSignal

Displaystheprocessedsignal.

Input Containsthefollowingoption:Inputsignal—Specifiestheanalogwaveformforthestep.

Configuration Containsthefollowingoptions:SubsetSetup—Containsthefollowingoptions:

Extractsubset—SpecifieswhethertoextractafrequencysubsetofthesignalusingtheStartfrequencyandSubsetlengthyouspecify.Startfrequency—Specifiesthestartfrequencyofthesubsetsignal.Subsetlength—Specifiesthefrequencyspanofthesubsetsignal.

ResamplingSetup—Containsthefollowingoptions:

Resample—Resamplestheentiresignal

orsubsetyouselect.Unwrapphase—Specifiesifthephaseoftheoutputsignalisunwrapped.Openinterval—Specifiesifthesubsetisanopenorclosedinterval.Forexample,ifaninputwaveformcontains3dataelementsatt={0,dt,2dt},anopenintervaldefinesthewaveformasextendingoverthetimeinterval0≤t<2dt,andaclosedintervaldefinesthewaveformasextendingoverthetimeinterval0≤t<3dt.Placeacheckmarkinthischeckboxtospecifyanopeninterval.Interpolationtype—Containsthefollowingoptions:

Coerce—Setseachoutputsamplevaluetoequaltheinputsamplevaluethatisclosesttoitinfrequency.Linear—Setseachoutputsamplevaluetobealinearinterpolationbetweenthetwoinputsamplesthatareclosesttoitinfrequency.Spline—Usesthesplineinterpolationalgorithmtocomputetheresampledvalues.Filterbased—Usesaninterpolationmethodbasedontheconvolutionofthesignalwithafiniteimpulseresponse(FIR)filter.

df—Specifiesthefrequencyresolutionoftheresampledfrequency-domainsignal.Thedefaultis0.

FilterSetup AvailablewhenyouselectFilterbasedfromInterpolationtype.Containsthefollowingoption:

FIRFilterSpecification—Containsthefollowingoptions:

Normalizedbandwidth—Thenormalizedcut-offfrequencyoftheFIRfiltertouse.Thedefaultis0.4000.Aliasrejection(dB)—TheminimumstopbandattenuationoftheFIRfiltertouse.Thedefaultis80dB.

SubsetandResample(TimeDomain)ExtractsasubsetofaninputsignalusingtheStartpositionandSubsetlengthyouspecifyorresamplesaninputsignalusingthetimeinterval(dt)youspecify.Ifyouspecifyalargerdt,SubsetandResampledownsamplesthesignal.Ifyouspecifyasmallerdt,SubsetandResampleupsamplesthesignal.

Parameter DescriptionInputSignal Displaystheinputsignal.

Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

ProcessedSignal

Displaystheprocessedsignal.

Input/Output Containsthefollowingoptions:Input—Containsthefollowingoption:

Inputsignal—Specifiestheanalogwaveformforthestep.

Output—Containsthefollowingoptions:Exportpre-subsetsignal—AddsthesignalthatprecedesthesubsetasanoutputofSubsetandResample.Exportpost-subsetsignal—AddsthesignalthatfollowsthesubsetasanoutputofSubsetandResample.

Configuration Containsthefollowingoptions:SubsetSetup—Containsthefollowingoptions:

Extractsubset—SpecifieswhethertoextractatimesubsetoftheinputsignalusingtheStartpositionandSubset

lengthyouspecify.Relativetime—SpecifiesiftheStartpositionvalueisanabsolutetimestampvalueoratimeoffsetrelativetothefirstsampleoftheinputsignal.Startposition—Specifiesthestartpositionofthesubsetsignal.Subsetlength—Specifiesthetimespanofthesubsetsignal.

ResamplingSetup—Containsthefollowingoptions:

Resample—Resamplestheentiresignalorsubsetyouselect.Optim.forsinglerecord—Optimizestheresamplingoperationforasinglerecord.Ifyouremovethecheckmarkfromthischeckbox,theresamplingprocessassumesthatthesignalsarecontinuousuntilyouresetthesignals.Openinterval—Specifiesifthesubsetisanopenorclosedinterval.Forexample,ifaninputwaveformcontains3dataelementsatt={0,dt,2dt},anopenintervaldefinesthewaveformasextendingoverthetimeinterval0≤t<2dt,andaclosedintervaldefinesthewaveformasextendingoverthetimeinterval0≤t<3dt.Placeacheckmarkinthischeckboxtospecifyanopeninterval.Interpolationtype—Containsthefollowingoptions:

Coerce—Setseachoutputsamplevaluetoequaltheinputsamplevaluethatisclosesttoitintime.Linear—Setseachoutputsamplevaluetobealinear

interpolationbetweenthetwoinputsamplesthatareclosesttoitintime.Spline—Usesthesplineinterpolationalgorithmtocomputetheresampledvalues.Filterbased—Usesaninterpolationmethodbasedontheconvolutionofthesignalwithafiniteimpulseresponse(FIR)filter.

dt—Specifiesthetimeresolutionoftheresampledtime-domainsignal.Thedefaultis0.

FilterSetup AvailablewhenyouselectFilterbasedfromInterpolationtype.Containsthefollowingoption:

FIRFilterSpecification—Containsthefollowingoptions:

Normalizedbandwidth—Thenormalizedcut-offfrequencyoftheFIRfiltertouse.Thedefaultis0.4000.Aliasrejection(dB)—TheminimumstopbandattenuationoftheFIRfiltertouse.Thedefaultis80dB.

TimeAveragingPerformstimeaveragingonatimesignalorscalarinput.

Parameter DescriptionInputSignal Displaystheinputsignal.

Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

Autoscaleamplitude

Autoscalesthepreviewgraphalongthey-axis.Thedefaultistoautoscaletheamplitude.

AveragedSignal

Displaystheaveragedtimesignal.

Autoscaleamplitude

Autoscaleamplitude—Autoscalesthepreviewgraphalongthey-axis.Thedefaultistoautoscaletheamplitude.

Configuration Containsthefollowingoptions:Inputsignal—Specifiestheinputsignalforthestep.AveragingConfiguration—Containsthefollowingoptions:

Weightingmode—Specifiesalinearorexponentialweightingmodeforthetimeaveragingoperation.ThedefaultisExponential.Numberofavg.—Specifiesthenumberofaveragestousefortimeaveraging.Averagingmode—Setstheaveragingmode.Containsthefollowingoptions:

Runningavg.—Specifiestocalculatearunningaverageofall

inputsignalsforthedurationoftheoperation.

Blockavg.(auto-restart)—RestartstheaveragingprocessassoonasAvg.count.reachesthevalueyouspecifyinNumberofavg.

Status—Containsthefollowingoptions:Dataready—Indicateswhentheaveragingprocessisdoneandtheaverageddataareready.Avg.counter—Displaystheaveragingprogress.

AdvancedMeasurementSetup

Containsthefollowingoption:Onlyreturndatawhenready—SpecifiestoonlyreturnanaveragedsignalwhenLabVIEWSignalExpresshasprocessedthenumberofsignalsspecifiedintheNumberofavg.field.

WindowAppliesthewindowyouselecttothetime-domainsignal.

Parameter DescriptionInputandOutputSignals

Displaystheinputsignalandthewindowedsignal.Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

Inputsignal

Specifiestheanalogwaveformforthestep.

WindowSetup

Containsthefollowingoption:Window—Specifiesthewindowtoapplytotheinputsignal.OptionsincludeNone,Hanning,Hamming,Blackman-Harris,ExactBlackman,Blackman,FlatTop,4TermB-Harris,7TermB-Harris,LowSidelobe,andGaussian.ThedefaultisNone.

WindowInformation

Containsthefollowingresults:Coherentgain—Indicatesthecoherentgainofthewindowyouselect.Eq.noisebandwidth—Indicatestheequivalentnoisebandwidthofthewindowyouselect.

Arithmetic(FrequencyDomain)Performsarithmeticoperationsontwosignals.Theavailableoperationschangedependingonthetypeoftheinputsignalsyouselect.Toselectthecorrecttypeofoperation,selectthefirstsignaltoprocessfromtheInputsignal1pull-downmenu.TheInputsignal2pull-downmenudisplaysonlythelistofcompatiblesignals,andthestepdisplaystheavailableoperations.

Parameter DescriptionInputSignals Displaysthetwoinputsignals.

Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

ResultingSignal

Displaysthesignalthatresultsfromthearithmeticoperation.

Input Containsthefollowingoptions:Inputsignal1—Specifiesthefirstinputsignal.Inputsignal2—Specifiesthesecondinputsignal.

Configuration Containsthefollowingoption:OperationSetup—Containsthefollowingoptions:

Operation—Specifiestoadd,subtract,multiply,ordividethesignalsafteralignment.TheResultingSignalgraphdisplaystheresultoftheoperation.ThedefaultisSubtract.Outputunit—Specifiestorepresenttheresultofamagnitudeoperationindecibelsortorepresenttheresultofa

phaseoperationindegreesorradians.Interpolateifneeded—Resamplesthesignalstoalignthefrequencybins.Interpolationtype—Containsthefollowingoptions:

Coerce—Setseachoutputsamplevaluetoequaltheinputsamplevaluethatisclosesttoitinfrequency.Linear—Setseachoutputsamplevaluetobealinearinterpolationbetweenthetwoinputsamplesthatareclosesttoitinfrequency.Spline—Usesthesplineinterpolationalgorithmtocomputetheresampledvalues.Filterbased—Usesaninterpolationmethodbasedontheconvolutionofthesignalwithafiniteimpulseresponse(FIR)filter.

Resultinginterval—SpecifiesiftheresultingsignalcoverstheCommonorGlobalfrequencyspanofthesignals.ThedefaultisGlobal.

FilterSetup AvailablewhenyouselectFilterbasedfromInterpolationtype.Containsthefollowingoption:

FIRFilterSpecification—Containsthefollowingoptions:

Normalizedbandwidth—Thenormalizedcut-offfrequencyoftheFIRfiltertouse.Thedefaultis0.4000.Aliasrejection(dB)—TheminimumstopbandattenuationoftheFIRfiltertouse.Thedefaultis80dB.

Arithmetic(TimeDomain)Performsarithmeticoperationsontwosignals.Theavailableoperationschangedependingonthetypeoftheinputsignalsyouselect.Toselectthecorrecttypeofoperation,selectthefirstsignaltoprocessfromtheInputsignal1pull-downmenu.TheInputsignal2pull-downmenudisplaysonlythelistofcompatiblesignals,andthestepdisplaystheavailableoperations.

Parameter DescriptionInputSignals Displaysthetwoinputsignals.

Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

ResultingSignal

Displaysthesignalthatresultsfromthearithmeticoperation.

Input Containsthefollowingoptions:Inputsignal1—Specifiesthefirstinputsignal.Inputsignal2—Specifiesthesecondinputsignal.

Configuration Containsthefollowingoption:OperationSetup—Containsthefollowingoptions:

Operation—Specifiestoadd,subtract,multiply,ordividethesignalsorcomputetheRMSsumofthesignals.Thedefaultistoaddthesignals.Ignoretimestamp—Ignoreseventualdifferencesintimestampsbyforcingthesecondsignaltimestamptobeequaltothefirstsignaltimestamp.

Interpolateifneeded—Resamplesthesignalstoalignthesamples.Optimizedforsinglerecord—OptimizestheresamplingoperationforexecutingArithmeticonce.PlaceacheckmarkinthischeckboxtospeedexecutionwhenArithmeticrunsonce.Interpolationtype—Containsthefollowingoptions:

Coerce—Setseachoutputsamplevaluetoequaltheinputsamplevaluethatisclosesttoitintime.Linear—Setseachoutputsamplevaluetobealinearinterpolationbetweenthetwoinputsamplesthatareclosesttoitintime.Spline—Usesthesplineinterpolationalgorithmtocomputetheresampledvalues.Filterbased—Usesaninterpolationmethodbasedontheconvolutionofthesignalwithafiniteimpulseresponse(FIR)filter.

Resultinginterval—SpecifiesiftheresultingsignalcoverstheCommonorGlobaltimeintervalofthesignals.

FilterSetup AvailablewhenyouselectFilterbasedfromInterpolationtype.Containsthefollowingoption:

FIRFilterSpecification—Containsthefollowingoptions:

Normalizedbandwidth—Thenormalizedcut-offfrequencyoftheFIRfiltertouse.Thedefaultis0.4000.

Aliasrejection(dB)—TheminimumstopbandattenuationoftheFIRfiltertouse.Thedefaultis80dB.

FormulaPerformsmathoperationsonuptofourinputvariables.Bydefault,Formulaprocessesonlyonevariable,butyoucanplacecheckmarksintheEnablecheckboxestoenablemorevariables.EnteraformulaintheFormulafieldusingthevariablenamesyouspecifyintheAliasfieldstorepresenttheInputvariablevalues.YoucanusetimewaveformorscalarvaluesfortheInputvariablevalues.IfyouapplytheFormulatomultipletimewaveforms,thewaveformsmustbethesamesizeorFormulareturnsanerror.IfalltheInputvariablevaluesaretimewaveforms,Formulareturnsatimewaveform.IfalltheInputvariablevaluesarescalarvalues,Formulareturnsascalarvalue.IftheInputvariablevaluesareamixoftimewaveformsandscalarvalues,Formulareturnsatimewaveform.Details

Parameter DescriptionInputandOutputWaveforms

DisplaysthewaveformsyouspecifyintheInputvariablefieldsandtheprocesseddatathatFormulareturnsafteryouapplytheFormulatothewaveforms.ThisgraphappearsonlywhenyouselectawaveformasanInputvariable.

InputandOutputScalars

DisplaysthescalarvaluesyouspecifyintheInputvariablefieldsandtheprocesseddatathatFormulareturnswhenyouapplytheFormulatothevalues.ThischartappearsonlywhenyouselectascalarvalueasanInputvariable.

Inputvariable0

Specifiesthefirstvariabletouse.

Alias0 Specifiesanaliasnameforthefirstvariable.Enable1 Enablesasecondvariable.Inputvariable1

Selectsthesecondvariabletouse.

Alias1 Specifiesanaliasnameforthesecondvariable.Enable2 Enablesathirdvariable.Input Selectsthethirdvariabletouse.

variable2Alias2 Specifiesanaliasnameforthethirdvariable.Enable3 Enablesafourthvariable.Inputvariable3

Selectsthefourthvariabletouse.

Alias3 Specifiesanaliasnameforthefourthvariable.OperationSetup

Containsthefollowingoptions:Formula—Specifiestheformulaforthecomputation.Valid—Reportsiftheformulaisvalidorinvalid.Ignoretimestamps—Specifiestoignoretimestampsoninputvariablesthataretimewaveforms.PlaceacheckmarkinthischeckboxtousetimewaveformsintheFormulathathavedifferenttimestamps.

FormulaDetailsIfyouspecifymultiplewaveformsfortheInputvariablevalues,LabVIEWSignalExpressappliestheFormulatoeachsampleofthewaveforms,whichiswhymultiplewaveformsmustbethesamesize.IfyouspecifyamixofwaveformsandscalarvaluesfortheInputvariablevalues,LabVIEWSignalExpressappliestheFormulatothescalarvalueandeachsampleofthewaveform.Forexample,ifyouspecifyaFormulathatmultipliesawaveformandascalarvalue,LabVIEWSignalExpressmultiplieseachsampleofthewaveformbythescalarvalue.ThefollowingtabledisplaysthemathfunctionsFormulasupports.

Function Descriptionabs(x) Returnstheabsolutevalueofx.acos(x) Computestheinversecosineofxinradians.acosh(x) Computestheinversehyperboliccosineofx.asin(x) Computestheinversesineofxinradians.asinh(x) Computestheinversehyperbolicsineofx.atan(x) Computestheinversetangentofxinradians.atanh(x) Computestheinversehyperbolictangentofx.ceil(x) Roundsxtothenexthigherinteger(smallestinteger≤x).ci(x) Evaluatesthecosineintegralforanyrealnonnegative

numberx.cos(x) Computesthecosineofx,wherexisinradians.cosh(x) Computesthehyperboliccosineofx.cot(x) Computesthecotangentofx(1/tan(x)),wherexisinradians.csc(x) Computesthecosecantofx(1/sin(x)),wherexisinradians.exp(x) Computesthevalueoferaisedtothexpower.expm1(x) Computesonelessthanthevalueoferaisedtothexpower

((e^x)–1).floor(x) Truncatesxtothenextlowerinteger(largestinteger≤x).getexp(x) Returnstheexponentofx.gamma(x) Evaluatesthegammafunctionorincompletegammafunction

forx.getman(x) Returnsthemantissaofx.int(x) Roundsxtothenearestinteger.intrz(x) Roundsxtothenearestintegerbetweenxandzero.ln(x) Computesthenaturallogarithmofx(tothebaseofe).lnp1(x) Computesthenaturallogarithmof(x+1).log(x) Computesthelogarithmofx(tothebaseof10).log2(x) Computesthelogarithmofx(tothebaseof2).rand() Producesafloating-pointnumberbetween0and1

exclusively.si(x) Evaluatesthesineintegralforanrealnumberx.sec(x) Computesthesecantofx,wherexisinradians(1/cos(x)).sign(x) Returns1ifxisgreaterthan0,returns0ifxisequalto0,

andreturns–1ifxislessthan0.sin(x) Computesthesineofx,wherexisinradians.sinc(x) Computesthesineofxdividedbyx(sin(x)/x),wherexisin

radians.sinh(x) Computesthehyperbolicsinceofx.spike(x) Generatesthespikefunctionforanyrealnumberx.sqrt(x) Computesthesquarerootofx.step(x) Generatesthestepfunctionforanyrealnumberx.tan(x) Computesthetangentofx,wherexisinradians.tanh(x) Computesthehyperbolictangentofx.

InteractiveAlignmentAlignstwoplotssoyoucancomparethem.YoucanaligntheTestsignalinsignalwiththeRef.signalinsignalmanuallybydraggingand/orexpandingtheTestplotonthegraphorbyusingalgorithmstoautomaticallyalignsteps,pulses,orperiodicparameters.Details

Parameter DescriptionInputSignals

Displaysthetwosignalstoalign.

AutoscaleY(x)

Adjuststheverticalscaletoreflectthedatafromtheinputsignals.

ComparisonResultSignal

DisplaysthecomparisonsignalthatresultsfromtheoperationyouspecifiedwithOperationintheResamplingandComparisonSetupsectionoftheResamplingpage.

AutoscaleComparisonSignal

Adjuststheverticalscaletoreflecttheresultoftheoperationonthetwoalignedsignals.

Autoscalex Adjuststhetimescaletoreflectthedatatodisplay.Input/Output Containsthefollowingoptions:

Ref.signalin—Specifiesthereferenceinputsignal.Testsignalin—Specifiesthetestinputsignaltoalignwiththereferencesignal.Exportalignedsignals—ExportstheRef.signalinandTestsignalinsignalstotheProjectView.TheInteractiveAlignmentstepresamplestheTestsignalintomatchtheRef.signalintimingparameters.Exportx-offsetresult—Exportsthex-offsetvaluetheGeometryParameterssectionoftheAlignmentpagedisplaystotheProjectView.Exporty-offsetresult—Exportsthey-offsetvaluetheGeometryParameterssectionofthe

AlignmentpagedisplaystotheProjectView.Exportx-gainresult—Exportsthex-gainvaluetheGeometryParameterssectionoftheAlignmentpagedisplaystotheProjectView.Exporty-gainresult—Exportsthey-gainvaluetheGeometryParameterssectionoftheAlignmentpagedisplaystotheProjectView.

Alignment Containsthefollowingoptions:GeometryParameters—Containsthefollowingoptions:

x-offset—Setsorreturnsthetimeshift(offset)ofthealignmentoperation.y-offset—Setsorreturnstheamplitudeoffsetofthealignmentoperation.x-gain—Setsorreturnsthetimestretch(gain)ofthealignmentoperation.y-gain—Setsorreturnstheamplitudegainofthealignmentoperation.Ignorex0—Forcesthetimestampvalueofthetestsignaltoequalthetimestampvalueofthereferencesignal.Allowx-offset—Allowsmanualtimeshift(offset)ofthetestsignal.Allowy-offset—Allowsmanualamplitudeoffsetofthetestsignal.Allowx-gain—Allowsmanualtimestretch(gain)ofthetestsignal.Allowy-gain—Allowsmanualamplitudegainofthetestsignal.

AlignmentConditions—Containsthefollowingoptions:

Mode—SpecifiesthemodeInteractiveAlignmentusestoalignthesignals.Youcanselectfromthefollowingoptions:

Manual—Allowsmanualalignmentofthetestsignal.

Auto-Impulse—Selectsanautomaticalignmentalgorithmbasedontheassumptionthatthesignalsincludeapositiveornegativeimpulsepattern.Auto-Step—Selectsanautomaticalignmentalgorithmbasedontheassumptionthatthesignalsincludearisingorfallingsteppattern.Auto-Periodic—Selectsanautomaticalignmentalgorithmbasedontheassumptionthatthesignalsareperiodic.

Invertsignal—Invertstheinputtestsignal.Criterion—Specifiesthefollowingalignmentcriterion:

AlignBaseandPeak—Alignsthetwoimpulsestoalignthebaseandpeaklevelsandtoalignthepeakpositionsintime.Align50-50%—Alignsthetwoimpulsestosuperposetheirrespective50%risingandfallingedgepoints.AlignEdgetoUserLevels—AlignstherisingorthefallingedgeoftheimpulsestosuperposetheLowlevel(%)andHighlevel(%)points.AlignImpulsetoUserLevels—AlignsthetwoimpulsestosuperposethepointstheRisinglevel(%)andFallinglevel(%)specifyonbothplotsrespectively.

Stepcriterion:AlignLow,HighandUser—Alignsthetwostepssothelowlevels(0%)andhighlevels(100%)arealignedandthepointsontheedgesMidlevel(%)specifiesaresuperposed.Align10%and90%—Alignsthetwostepssothe10%and90%pointsontherisingorthefallingedgesaresuperposed.AligntoUserLevels—AlignsthetwostepssothepointsLowlevel(%)andHighlevel(%)specifyontherisingorthefallingedgesaresuperposed.

Periodiccriterion:AlignFreq,Phaseandp-p—Alignsthetwoperiodicsignalssothefundamentaltonesaresuperposed.

Fallingedge—Specifiestoperformtheedgealignmentoperationontherisingorfallingedgeoftheimpulsesorsteps.LevelA—Containsthefollowingoptions:

Lowlevel(%)—Specifiesthelevelofasignalpointtouseasthelowreferenceinanedgealignmentoperation.Theunitisapercentageoftheamplitudeoftheimpulseorthesteptoalign.Thedefaultis10.

Risinglevel(%)—Specifiestheleveloftherisingedgepointstosuperposeinanimpulsealignmentoperation.Thedefaultis

50.Midlevel(%)—Specifiesthelevelofasignalpointtouseasthemediumreferenceinastepalignmentoperation.Theunitisapercentageoftheimpulseorthesteptoalign.Thedefaultis50%.

LevelB—Containsthefollowingoptions:Highlevel(%)—Specifiesthelevelofasignalpointtouseasthehighreferenceinanedgealignmentoperation.Theunitisapercentageoftheamplitudeoftheimpulseorthesteptoalign.Thedefaultis90.Fallinglevel(%)—Specifiesthelevelofthefallingedgepointstosuperposeinanimpulsealignmentoperation.Thedefaultis50.

Resampling Containsthefollowingoptions:ResamplingandComparisonSetup—Containsthefollowingoptions:

Interpolationtype—Containsthefollowingoptions:

Coerce—Setseachoutputsamplevaluetoequaltheinputsamplevaluethatisclosesttoitintime.Linear—Setseachoutputsamplevaluetobealinearinterpolationbetweenthetwoinputsamplesthatareclosesttoitintime.Spline—Usesthesplineinterpolationalgorithmtocompute

theresampledvalues.Filterbased—Usesaninterpolationmethodbasedontheconvolutionofthesignalwithafiniteimpulseresponse(FIR)filter.

Operation—Specifiestoadd,subtract,multiply,ordividethesignalsafteralignment.TheResultingSignalgraphdisplaystheresultoftheoperation.ThedefaultisSubtract.

FIRFilterSpecification—Containsthefollowingoptions:

Normalizedbandwidth—Thenormalizedcut-offfrequencyoftheFIRfiltertouse.Thedefaultis0.4000.Aliasrejection(dB)—TheminimumstopbandattenuationoftheFIRfiltertouse.Thedefaultis80dB.

InteractiveAlignmentDetailsMovingtheTestplotYoucandragtheTestplottomoveit.Whenyoureleasethemousebutton,thegraphperformsanautoscaleoperationtooptimizetheviewingoftheplotsunlessyouremovethecheckmarksfromtheAutoscalecheckboxes.LabVIEWSignalExpressdoesnotupdatethelowergraphthatdisplaystheComparisonResultSignalwhenyoudragtheTestplot,butitperformsanewcomparisonoperationassoonasyoureleasethemousebutton.AsmallcrossontheuppergraphcalledtheAnchorpointmarksthelocationwhereyoulastreleasedthemouse.TomovetheAnchorpointposition,clickonthenewlocation.

ExpandingtheTestplotYoualsocanexpandtheTestplotinbothdirections,correspondingtoagain/attenuationofthesignalamplitudeintheverticaldirectionandatimeexpansion/compressioninthehorizontaldirection.Toexpandtheplot,pressthe<Alt>key,clickthegraph,anddragit.TheexpansionkeepsthepositionoftheAnchorpointunchanged;andthemousepositionpointintheplaneatthestartoftheexpansionfollowsthemousemove.

LockingMoveorExpansionYoucanpreventunwantedmovesand/orexpansionsinspecificdirectionsbyremovingthecheckmarkfromthecorrespondingAllowx-gain,Allowy-gain,Allowx-offset,orAllowy-offsetcheckbox.NoticethatpreventingcertainmovesorexpansionconflictswiththeactualpositionoftheAnchorpointandresultsinslightlydifferentexpansionbehaviors.

AlignmentEvaluationYoucanevaluatethealignmentonthelowergraphthatdisplaystheComparisonResultSignal.ThissignaldisplaystheresultofanarithmeticoperationyoucanspecifyLabVIEWSignalExpresstoperformonthetwoalignedsignals.ThedefaultisSubtract.

ExportingAlignmentResultsYoucanexportthealignmentinformationusingthefollowingcheckboxesontheInput/Outputpage:

ExportalignedsignalsExportx-offsetresultExporty-offsetresultExportx-gainresultExporty-gainresult

ResamplingtheTestsignalToaligntheTestsignalinwiththeRef.signalin,youmustresamplethesignalsoyoucanperformasamplebysamplearithmeticoperationlikesubtraction.TheresamplingprocessensuresthatLabVIEWSignalExpresssamplesthealignedwaveformsatthesamerateandinphase.YoucanselectdifferentresamplingoptionsontheResamplingpage.

ConvertAnalogtoDigitalConvertsananalogwaveformtoadigitalwaveform.

Parameter DescriptionAnalogsignalpreview

Displaystheanalogwaveformyouwanttoconvertintoadigitalwaveform.

Xscaleslider SelectsthedatadisplayedintheDigitalwaveformpreview.

Signalnamepreview

DisplaysthesignalnamesassociatedwiththesignalsintheDigitalwaveformpreview.

Digitalwaveformpreview

Displaysthedigitalwaveformconvertedfromtheinputanalogwaveform.

DigitalpreviewYscrollbar

ScrollbarthatallowsyoutoscrollthroughtheDigitalwaveformpreview.

Input Containsthefollowingoptions:Inputsignal—Specifiestheanalogwaveformforthestep.

Configuration Containsthefollowingoptions:Analogfullscale—Thetotalpeak-to-peakrange,orthedifferencebetweentheminimumandmaximum,fortheanalogwaveform.Forexample,ifthemaximumrangeofawaveformis1andtheminimumis-1,thefull-scalerangeforthewaveformis2.Resolution(bits)—Specifiesthenumberofbitsrepresentedinthedigitalwaveform.LabVIEWSignalExpresssupportsamaximumresolutionof32bits.Digitaldataformat—Specifieswhichbinaryrepresentationyouwanttouseforthedigitaldata.

Unsignedbinary—Thedataisconvertedtounsignedbinary.

Offsetbinary—Thelargestnegativevalue(negativefull-scale)isrepresentedbyallzeros,andthelargestpositivevalue(positivefull-scale)isrepresentedbyallones.Zero-scaleisrepresentedbyaone(MSB)followedbyallzeros,forexample,binary1000.2'scomplement—Usestwo'scomplementformat,whichisacommonformatforrepresentingsignedbinaryvalues.ThisformatissimilartoOffsetBinary,buttheMSBisinverted.

Ditheringenabled—Specifieswhethertheanalogwaveformcanbedithered.DitheringawaveformaddsGaussiannoisetoananaloginputsignaltoincreaseresolution.

SignalNames

Containsthefollowingoptions:Signalnamestable—Allowsyoutospecifycustomnamesforyoursignals.Resettodefault—SpecifieswhethertheSignalnamesareresettotheirdefaultstates.

ConvertDigitaltoAnalogConvertsaninputdigitalwaveformintoananalogwaveform.

Parameter DescriptionDigitalwaveformpreview

Displaystheinputdigitalwaveform.

DigitalpreviewYscrollbar

ScrollbarthatallowsyoutoscrollthroughtheDigitalwaveformpreview.

Signalnamepreview

DisplaysthesignalnamesassociatedwiththesignalsintheDigitalwaveformpreview.

Analogsignalpreview

Displaysapreviewoftheanalogwaveform.

Xscaleslider SelectsthedatadisplayedintheDigitalwaveformpreview.

Input Containsthefollowingoptions:Inputsignal—Specifiesthedigitalwaveformtoconverttoananalogwaveform.

ConfigurationandResults

Containsthefollowingoptions:Analogfullscale—Thetotalpeak-to-peakrange,orthedifferencebetweentheminimumandmaximum,fortheanalogwaveform.Forexample,ifthemaximumrangeofawaveformis1andtheminimumis-1,thefull-scalerangeforthewaveformis2.Digitaldataformat—Specifieswhichbinaryrepresentationyouwanttouseforthedigitaldata.

Unsignedbinary—Thedataisconvertedtounsignedbinary.Offsetbinary—Thelargestnegativevalue(negativefull-scale)isrepresentedbyallzeros,andthelargestpositivevalue(positivefull-scale)isrepresented

byallones.Zero-scaleisrepresentedbyaone(MSB)followedbyallzeros,forexample,binary1000.2'scomplement—Usestwo'scomplementformat,whichisacommonformatforrepresentingsignedbinaryvalues.ThisformatissimilartoOffsetBinary,buttheMSBisinverted.

Outputsignalunit—Specifiestheunittypefortheoutputsignal.SelectingUnitlessspecifiestonotassociateanyunitwiththeoutputsignal.SelectingCustomspecifiesthattheoutputsignalcontainsanassociatedunitwithinthedata.Resolution(bits)—Returnsthenumberofbitsintheconverteddigitalwaveform.Exportresolution—ExportstheresolutiontotheProjectView.Yaxisunit—Specifiestheunittypefortheinputsignal.SelectingUnitlessspecifiestonotassociateanyunitwiththeinputsignal.SelectingCustomspecifiesthattheinputsignalcontainsanassociatedunitwithinthedata.Xaxisunit—Specifiestheunittypefortheinputsignal.SelectingUnitlessspecifiestonotassociateanyunitwiththeinputsignal.SelectingCustomspecifiesthattheinputsignalcontainsanassociatedunitwithinthedata.

AnalysisUsetheAnalysisstepstoanalyzeyourLabVIEWSignalExpressmeasurements.

Toviewrelatedtopics,clicktheLocatebutton,shownatleft,inthetoolbaratthetopofthiswindow.TheLabVIEWSignalExpressHelphighlightsthistopicintheContentstabsoyoucannavigatetherelatedtopics.

Time-DomainMeasurementsUsetheTime-DomainMeasurementsstepstoperformtimedomainanalysis.TheTime-DomainMeasurementsstepsimplementsomeoperationscommonlyusedinsignalprocessing.

Toviewrelatedtopics,clicktheLocatebutton,shownatleft,inthetoolbaratthetopofthiswindow.TheLabVIEWSignalExpressHelphighlightsthistopicintheContentstabsoyoucannavigatetherelatedtopics.

AmplitudeandLevelsMeasuresDC,RMS,positiveandnegativepeak,andpeak-to-peakvaluesofasignal.YoucanmeasureDCandRMSvalueswithlinearorexponentialaveraging.IfyouselectLinear,youcanapplyawindowtothesignal.Youalsocanindividuallyexportthedifferentmeasurementresults.

Parameter DescriptionInputSignal Displaystheinputsignal.

Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

Autoscaleamplitude

Autoscalesthepreviewgraphalongthey-axis.Thedefaultistoautoscaletheamplitude.

Input/Output Containsthefollowingoptions:Inputsignal—Specifiestheinputsignaltobemeasured.ExportDCvalue—ExportstheDCvaluetotheProjectView.ExportRMSvalue—ExportstheRMSvaluetotheProjectView.Export+Peakvalue—ExportsthepositivepeakvaluetotheProjectView.Export-Peakvalue—ExportsthenegativepeakvaluetotheProjectView.ExportPeak-Peakvalue—ExportsthedifferencebetweenthepositiveandnegativepeakvaluestotheProjectView.

Configuration Containsthefollowingoptions:

DC-RMSSetup—Containsthefollowingoptions:Averagingtype—Setsthetypeofaveragingtolinearorexponential.ThedefaultisLinear.Window—Setsthetypeofwindowwhenyouuselinearaveraging.Windowingcansometimeshelpincreasemeasurementaccuracyforsignalsthataredominatedbyperiodiccomponents

WindowisnotavailableifyouselectExponentialastheaveragingtype.Windowcontainsthefollowingoptions:Rectangular(none),Hanning,andLowsidelobe.ThedefaultisRectangular(none).

PeakSetup—Containsthefollowingoption:Holdpeaks—SpecifiestoholdthepeaklevelsuntilyouclicktheResetAmplitudeandLevelsbuttonortheResetAllbuttonorrestartyourmeasurement.Thedefaultistonotholdthepeaklevels.

DC-RMSResults—Containsthefollowingoptions:

DCvalue—ReturnsthemeasuredDCvalue.RMSvalue—ReturnsthemeasuredRMSvalue.

PeakResults—Containsthefollowingoptions:+Peakvalue—Returnsthepositivepeakvalueoftheinputsignal.-Peakvalue—Returnsthenegativepeakvalueoftheinputsignal.Peak-peakvalue—Returnsthedifferencebetweenthepositiveandnegativepeakvaluesoftheinputsignal.

HistogramCalculatesthediscretehistogramoftheinputsignal.TheHistogramresultrunscontinuouslyandaccumulatesthedatafromallincomingsignalsuntilyouclicktheResetHistogrambuttononthetitlebaroftheHistogramconfigurationvieworyouchangeaconfigurationparameter.Youcancomputetheresultingbinvaluesasanabsolutenumberofoccurrenceorasapercentageofthetotalnumberofoccurrences.Youalsocandisplaytheaccumulatedbinvaluesinalogarithmicscale.ClicktheAuto-configbuttonbelowtheHistogramgraphtodisplaystandardstart-upconfigurationoptions.

Parameter DescriptionInputSignal Displaystheinputsignal.

Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

Histogram Displaysthehistogramoftheinputsignal.Auto-config. SetsthevaluesinNumberofbins,Minimumvalue,

andMaximumvaluebasedontheinputsignal.Log.binvalues

Scalesthebinvaluesaxistologarithmicscale.Thedefaultistonotscalethebinvaluesaxistologarithmicscale.

Input Containsthefollowingoption:Inputsignal—Specifiestheanalogwaveformforthestep.

Configuration Containsthefollowingoption:HistogramSpecifications—Containsthefollowingoptions:

Numberofbins—Specifiesthenumberofbins.Thedefaultis20.

Minimumvalue—Specifiestheminimumvalue.Thedefaultis–1.Maximumvalue—Specifiesthemaximumvalue.Thedefaultis1.Binvalueinpercent—Configuresthehistogramresulttoscalebypercent.Thedefaultistoscaletheresultbypercent.Calculationenabled—Enablescalculationofthehistogram.Thedefaultistoenablethecalculation.

StatisticsPerformsstatisticalcalculationsontime-domain,scalar,orarrayofscalardata.Youcanselectuptosixstatisticalmeasurementstoperformonyourdata,andStatisticscreatesascalaroutputforeachspecifiedmeasurement.Iftheinputsignalisawaveform,bydefaultStatisticsreturnsastatisticalmeasurementonthecurrentinputsignal.Forscalardata,theStatisticsstepreturnsastatisticalmeasurementthatrepresentstheentiresignalhistorysinceyoustartedtheprojectoryouresetthestep.

Parameter DescriptionInputSignal Displaystheinputsignal.IfyouwiredatatotheExpress

VIandrunit,InputSignaldisplaysrealdata.IfyoucloseandreopentheExpressVI,InputSignaldisplayssampledatauntilyouruntheExpressVIagain.

Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

Numberofpointsinthedata—Specifiesthenumberofpointsinthedata.Thedefaultis4400.

Input Containsthefollowingoption:Inputsignal—Specifiestheinputvalue.

ConfigurationAndResults

Containsthefollowingoptions:Max—Specifiestooutputthemaximumvalueofthecurrentinputsignal.Min—Specifiestooutputtheminimumvalueofthecurrentinputsignal.Mean—Specifiestooutputthemeanvalueofthecurrentinputsignal.Nbofsamples—Specifiestooutputthenumber

ofinputsamplestheStatisticsstepperformsstatisticalmeasurementson.Combinechannels—SpecifieswhetherStatisticsreturnssingleoutputsformeasurementsongroupsofinputsignals.Forexample,ifyouconfigureStatisticstomeasurethemaximumvalueofthesignals,placingacheckmarkinthischeckboxreturnsthemaximumvalueofallthesamplesofallthechannels,insteadofonemaximumvalueperchannel.ThisoptionappearsonlywhenInputsignalisagroupofsignals.Standarddeviation—Specifiestooutputthestandarddeviationofthecurrentinputsignal.Variance—Specifiestooutputthevarianceofthecurrentinputsignal.Sum—Specifiestooutputthesumofthecurrentinputsignal.Measurementduration(s)—IndicatesthedurationofeachmeasurementtheStatisticsstepisreturning.Restartmeasurementoneachiteration—Specifiestorestartthestatisticalmeasurementoneachiterationoftheinputsignal.Ifyoudonotselectthisoption,outputstatisticsrepresentthecumulativevaluesoftheentireinputsignal.

TimingandTransitionMeasurestimingandtransitionparametersonsinglepulsesandonrisingandfallingedges.Ifthesignalincludesasinglepositiveornegativepulseorapulsetrain,youcanmeasurethepulsefrequency,period(1/frequency),duration,anddutycycle.Youalsocanusethissteptomeasurethetransitiontime,riseorfalltime,theamountofundershootandovershoot,andtheslewrateonrisingandfallingedges.Youcanselectthepulsepolarityandthepulseand/oredgenumbersontheAdvancedpage.Details

Parameter DescriptionInputSignal Displaystheinputsignaltomeasure.Cross-haircursors

indicatethepulseandedgestouseforthemeasurements.Thisstepmarksedgesatthepulseandmid-transitionpointsatitscenterpositionusingthecolorcodeinthethreeresulttables.

Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

Autoscaleamplitude

ScalestheAmplitude(V)axisoftheAcquiredDatagraph.Thedefaultistoautoscaletheamplitude.

Input Containsthefollowingoption:Inputsignal—Specifiestheanalogwaveformforthestep.

ConfigurationandResults

Containsthefollowingoptions:Pulseresults—Containstheresultsofthepulsemeasurements.Ifoneormoremeasurementsyouselectfail,thisstephighlightsthebackgroundcolorofthefailingmeasurementsin

red.Todisablefailingmeasurements,removethecheckmarkfromthecorrespondingcheckboxes.Containsthefollowingoptions:

Exportfrequency—MeasuresthefrequencyofapulsetrainandexportsthemeasurementresulttotheProjectView.Exportperiod—MeasurestheperiodofapulsetrainandexportsthemeasurementresulttotheProjectView.Exportduration—MeasuresthedurationofapulseandexportsthemeasurementresulttotheProjectView.Exportdutycycle—MeasuresthedutycycleofapulseandexportsthemeasurementresulttotheProjectView.

Risingedgeresults—Containstheresultsoftherisingedgetransitionmeasurements.Ifoneormoremeasurementsyouselectfail,thisstephighlightsthebackgroundcolorofthefailingmeasurementsinred.Todisablefailingmeasurements,removethecheckmarkfromthecorrespondingcheckboxes.Containsthefollowingoptions:

Exportrisetime—Measurestherisingtransitiontime(risetime)ofanedgeandexportsthemeasurementresulttotheProjectView.Therisetimeisthetimeittakesthesignaltochangefromalowreferencelevel(10%oftheamplitudeofthesignal)toahighreferencelevel(90%oftheamplitudeofthesignal).Exportrisingundershoot—MeasuresthepercentageamountofundershootthatprecedesarisingedgeandexportsthemeasurementresulttotheProjectView.

Exportrisingovershoot—MeasuresthepercentageamountofovershootthatfollowsarisingedgeandexportsthemeasurementresulttotheProjectView.Exportrisingslewrate—Measurestheslewrate,ortheratiobetween(90%amplitude–10%amplitude)andtherisetime,ofarisingedgeandexportsthemeasurementresulttotheProjectView.

Fallingedgeresults—Containstheresultsofthefallingedgetransitionmeasurements.Ifoneormoremeasurementsyouselectfail,thisstephighlightsthebackgroundcolorofthefailingmeasurementsinred.Todisablefailingmeasurements,removethecheckmarkfromthecorrespondingcheckboxes.Containsthefollowingoptions:

Exportfalltime—Measuresthefallingtransitiontime(falltime)ofanedgeandexportsthemeasurementresulttotheProjectView.Thefalltimeisthetimeittakesthesignaltochangefromahighreferencelevel(90%oftheamplitudeofthesignal)toalowreferencelevel(10%oftheamplitudeofthesignal).Exportfallingundershoot—MeasuresthepercentageamountofundershootthatfollowsafallingedgeandexportsthemeasurementresulttotheProjectView.Exportfallingovershoot—MeasuresthepercentageamountofovershootthatprecedesafallingedgeandexportsthemeasurementresulttotheProjectView.Exportfallingslewrate—Measurestheslewrate,ortheratiobetween(90%amplitude–10%amplitude)andthefalltime,ofafallingedgeandexportsthe

measurementresulttotheProjectView.

Advanced Containsthefollowingoptions:PulseDefinition—Containsthefollowingoptions:

Pulsepolarity—Specifiesifthepulsetomeasureispositive(HighPulse)polarityornegative(LowPulse)polarity.Pulsenumber—Specifieswhichpulsenumberinapulsetraintouseforthemeasurement.

TransitionDefinition—Containsthefollowingoptions:

Risingedgenumber—Specifieswhichrisingedgetouseforthemeasurement.Fallingedgenumber—Specifieswhichfallingedgetouseforthemeasurement.

TimingandTransitionDetailsThefollowingimageshowsasamplepulse.TimingandTransitionusesahighreferencelevelof90%oftheamplitudeofthesignalandalowreferencelevelof10%oftheamplitudeofthesignal.Inatimingandtransitionmeasurement,overshootistheheightofalocalmaximumprecedingarisingorfallingedge,dependingonthePulsepolarityyouspecify.Undershootistheheightofthelocalminimumprecedingarisingorfallingedge,dependingonthePulsepolarityyouspecify.

Frequency-DomainMeasurementsUsetheFrequency-DomainMeasurementsstepstoperformsignalanalysisthatrequirethedatatobeconvertedintofrequencydomain.TheFrequency-DomainMeasurementsstepsperformfrequencydomaintransformationsandfrequencydomainanalysis.

Toviewrelatedtopics,clicktheLocatebutton,shownatleft,inthetoolbaratthetopofthiswindow.TheLabVIEWSignalExpressHelphighlightsthistopicintheContentstabsoyoucannavigatetherelatedtopics.

PowerSpectrumComputestheaveragedmagnitudespectrum,powerspectrum,orpowerspectraldensityforasingleormultiplechannels.Thisstepcanreturnthespectrainroot-mean-square,peak,andpeak-to-peakunits.

Parameter DescriptionGraph Spectra—Displaysthespectraforallchannels.Usethe

Zoombuttontozoominandoutofthedisplay.

Signals—Displaysthetime-domainsignalsforallchannels.UsetheZoombuttontozoominandoutofthedisplay.

View Specifiesifthegraphdisplaystimedomainsignalsorthecomputedpowerspectra.

Autoscale Automaticallyadjuststhescalesofthegraphtodisplaythedata.

Input Containsthefollowingoption:Inputsignal—Specifiestheanalogwaveformforthestep.

Configuration Containsthefollowingoptions:Window—Specifiesthewindowtoapplytotheinputsignal.Choosefromoneofthefollowingwindowoptions:

NoneHanningHammingBlackman-HarrisExactBlackmanBlackmanFlatTop4TermB-Harris(FourTermBlackman-Harris)7TermB-Harris(SevenTermBlackman-Harris)

LowSidelobeGaussian

Scaling—Specifiesthescalingparameterforthestep.

Spectrumtype—SpecifiesifthespectrumisinunitsofMagnitudeorPower,wherepowerequalsmagnitudesquared.ThedefaultisPower.Magnitudescale—Specifiesifzoompowerisinlinearunitsorindecibels.Thedefaultisdecibels.Peakconversion—Specifiesthepeakscalingoftheconvertedspectrum.YoucanselectRMS(default),Peak,orPeaktoPeak.Spectraldensity—Specifiesifthespectrumisreturnedaspowerspectraldensity(PSD).ThedefaultisOff.

Averaging Specifiestheaveragingparameters.Averagingmode—Specifiestheaveragingmodefromthefollowingoptions:

NoAveraging(Default)VectorAveragingRMSAveragingPeakHold

Weightingmode—SpecifieseitherExponentialorLinearweighting.Exponentialaveragingappliesmoreweighttothemostrecentdata,andlinearaveragingappliesequalweightingtoallthedata.Numberofaverages—SpecifiesthenumberofaveragesusedbytheselectedWeightingmode.Auto-restart—SpecifiesiftheaveragingprocessautomaticallyrestartsoncethestepreachestheNumberofaveragesvalue.Whenyouset

Weightingmodetolinear,useAuto-restarttoconfigureaveragingtoautomaticallyrestartwhenAveragescompletedequalstheNumberofaverages.Averagescompleted—Displaysthenumberofaveragescompleted.Averagingdone—IndicateswhenthenumberofAveragescompletedequalsorexceedstheNumberofaverages.AveragingdoneisalwaysTRUEiftheselectedAveragingmodeisNoaveraging.

DistortionPerformsharmonicdistortionanalysisand/orSINADmeasurementontheinputsignal.Thisstepreturnsthefundamentalfrequency,thepercentageoftotalharmonicdistortion,thetotalharmonicdistortionplusnoisevalue,andtheSINADvalueindecibels.Thisstepalsoreturnsatime-domainwaveformandfrequency-domainpowerspectrumforthedifferentcomponentsofthesignal,suchasfundamentalsignal,residualsignal,orharmonics.

Parameter DescriptionExportedSignal

DisplaysthetimesignalyouselectedwithExportsignalsintheMeasurementSetupsectionontheConfigurationpage.

Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

ExportedPowerSpectrum

DisplaysthepowerspectrumofthesignaltheExportedSignalgraphdisplays.

Autoscalemagnitude

Scalesthemagnitudeoftheexportedpowerspectrum.Thedefaultistoautoscalethemagnitude.

Input/Output Containsthefollowingoptions:Inputsignal—Specifiestheinputsignaltobemeasured.Exporttimesignal—ExportsthesignaltotheProjectViewasExportSignals(THD)orExportSignals(SINAD)specifies.Exportpowerspectrum—ExportsthepowerspectrumtotheProjectViewasExportSignals

(THD)orExportSignals(SINAD)specifies.Configuration Containsthefollowingoptions:

MeasurementSetup—Containsthefollowingoptions:

Distortiontypes—SpecifiesHarmonicOnly,SINADOnly,orHarmonicandSINADdistortion.Highestharm.—Specifiesthehighestharmonictoincludeinthecalculationoftheharmonicdistortion.Thedefaultis19,sotheTHDresultisbasedonharmonics2to19(bothincluded)assumingthattheExcludealiasedharmonicscheckboxdoesnotincludeacheckmark.IfyouplaceacheckmarkintheExcludealiasedharmonicscheckbox,Highestharm.includesonlytheharmonicsbelowtheNyquistfrequency.TheNyquistfrequencyishalfthesamplerateoftheinputsignal.Exportsignals(THD)—SpecifieswhichsignalstodisplayonthetwographsandtoexporttotheProjectView.OptionsincludeInputSignal,FundamentalTone,ResidualSignal,HarmonicsOnly,NoiseandSpursorNone(nosignal).ThedefaultisInputSignal.Exportsignals(SINAD)—SpecifieswhichsignalstodisplayonthetwographsandtoexporttotheProjectView.OptionsincludeInputSignal,FundamentalTone,ResidualSignal,orNone(nosignal).ThedefaultisInputSignal.

MeasurementResults—Containsthefollowingoptions:

Fund.Frequency—Returnsthe

detectedfundamentalfrequencyoftheinputsignal.THD(%)—ReturnsthemeasuredpercentageoftotalharmonicdistortionuptoandincludingthehighestharmonicorlimitedbytheNyquistfrequency.SINAD(dB)—Returnsthemeasuredsineinnoiseanddistortionvalueindecibels.THD+Noise(%)—Returnsthemeasuredtotalharmonicdistortionplusnoise.NoticethatthisresultalwaysincludesallharmonicsandisthereforeindependentofthevalueyouspecifyforHighestharm.

Advanced Containsthefollowingoptions:Approx.fund.freq.(Hz)—Returnsthecenterfrequencytouseinthefrequency-domainsearchforthefundamentaltone.Anegativevaluespecifiestosearchforthetonewiththehighestamplitude.Thedefaultis–1.Excludealiasedharmonics—ExcludealiasedharmonicsshouldbesettoTRUE(default)toincludeonlyfrequencieslessthantheNyquistfrequency,orhalfthesamplingrate,intheharmonicsearch.WhensettoFALSE,thisstepcontinuessearchingthefrequencydomainbeyondNyquistbyassumingthathigherfrequencycomponentshavealiasedaccordingtothefollowingequation.

Aliasedf=Fs–(fmoduloFs)

where

Fs=1/dt=samplingrate.

ToneExtractionFindsthesingletonewiththehighestamplitudeorsearchesafrequencyrangeyouspecifytofindthesingletonewiththehighestamplitudeandreturnsthefrequency,amplitude,andabsolutephaseforthedetectedtone.ThestepalsocanexportExportsignalstotheProjectView.

Parameter DescriptionExportedTimeSignal

DisplaysthetimesignalthatExportsignalsspecifies.Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

ExportedPowerSpectrum

DisplaysthepowerspectrumindecibelsthatExportedTimeSignalspecifies.

Autoscalemagnitude

Scalesthemagnitudescaleofthepowerspectrumresultgraph.Thedefaultistoautoscalethemagnitude.

Input/Output Containsthefollowingoptions:Inputsignal—Specifiesthesignalfromwhichtoextracttonaldata.Exporttimesignal—ExportsthetimesignalthatExportedTimeSignaldisplaystotheProjectView.Exportpowerspectrum—ExportsthepowerspectrumresultthatExportedPowerSpectrumdisplaystotheProjectView.

Configuration Containsthefollowingoption:MeasurementSetupandResults—Containsthefollowingoptions:

Exportsignals—Specifiesthesignaltodisplayonthegraphsandoptionally

exporttotheProjectView.OptionsincludeNone,InputSignal,ExtractedTone,orResidualSignal,whichistheinputsignalminustheextractedsingletone.ThedefaultisInputSignal.Detectedfrequency—Returnsthefrequencyofthedetectedsingletoneinhertz.Detectedamplitude—Returnstheamplitudeofthedetectedsingletone.Detectedphase(deg)—Returnsthephaseofthedetectedsingletoneindegrees.

Advanced Containsthefollowingoption:AdvancedMeasurementSetup—Containsthefollowingoptions:

Approximatefrequency(Hz)—Specifiesthecenterfrequencytouseinthefrequency-domainsearchforthesingletone.Anegativevaluecorrespondstosearchautomaticallyforthetonewiththehighestamplitude.Thedefaultis–1.Searchrange(%ofsamplerate)—Specifiesthefrequencyspanasapercentageofthesamplingrateforthefrequency-domainsearchforthesingletonefrequency.Thedefaultis0.25%.

TestandCompareUsetheTestandComparestepstocompareaninputsignaltouser-specifiedlimits.

Toviewrelatedtopics,clicktheLocatebutton,shownatleft,inthetoolbaratthetopofthiswindow.TheLabVIEWSignalExpressHelphighlightsthistopicintheContentstabsoyoucannavigatetherelatedtopics.

LimitTestTestsaninputsignalorvalueagainstuser-specifiedlimitsandreturnsinformationonwhetherthetestpassedorfailedand,inthecaseofafailure,whereitfailed.LimitTestacceptstime-domainsignals,frequency-domainsignals,andscalarvaluesasinputs.Youcanspecifyeithersignalsorscalarvaluesforthelimits,andyoucandefinethelimitsoruseothersignalsintheprojectasthelimits.Details

Parameter DescriptionView Specifieshowtodisplaytheresultsofthelimittest.You

canselectfromthefollowingoptions:Graph—(Default)Displaystheresultsofthelimittestasagraph.Resultstable—Displaystheresultsofthelimittestasatable.

LimitTest [View:Graph]Displaystheresultofthelimittestoperation.Thefourplotsshowtheoriginalinputsignal,thepointswherethelimittestoperationfailed,andthetwolimitsignals,respectively.

Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

Limittestresults

[View:Resultstable]Displayseachsignalinthelimittestandwhetherornotthesignalpassedthetest.

Autoscaley-axis

[View:Graph]Specifieswhethertoautoscalethey-axisontheLimitTestgraph.

selectedtest IndicateswhetherthetestofthesignaldisplayedontheLimitTestgraphpassedorfailed.Thisindicatorappearsonlywhenyoutestagroupofsignals.

alltests Indicatesifthetestspassedorfailed.Input ThefollowingoptionsapplyonlytotheLimitTeststepin

LabVIEWSignalExpress:Inputsignal—Specifiestheinputsignalorscalarvalue.Upperlimit—[Limitssource:InputSignals,InputScalars]Specifiestheupperlimitsignalorvalue.

NoteWhenaLabVIEWSignalExpressprojectrunscontinuously,LabVIEWSignalExpressreadstheUpperlimitandLowerlimitonlyonthefirstiterationoftheproject.Ifyouselectalimitsignalthatcontinuouslychanges,LabVIEWSignalExpressusesonlythefirstiterationofthesignaltoperformthelimittest.

Lowerlimit—[Limitssource:InputSignals,InputScalars]Specifiesthelowerlimitsignalorvalue.Limit—[Limitssource:InputSignals,InputScalarsANDLimitswindowbasedon:SingleLimit&Range]Specifiesthesinglelimitsignalorvalue.

Inputtype ThefollowingoptionsapplyonlytotheLimitTestExpressVIinLabVIEW:

TimeWaveform—Specifiestoperformlimittestingonatimedomainsignal.FrequencyWaveform—Specifiestoperformlimittestingonafrequencyspectrum.Scalar—Specifiestoperformlimittestingonasinglescalarvalue.

Configuration Containsthefollowingoptionsforconfiguringthelimitsforthelimittest:

LimitSetup—Containsthefollowingoptions:Limitssource—Specifiesthesourceofthelimitsforthelimittest.Youcanselectfromthefollowingoptions:

InputSignals—UsesoutputsignalsfrompreviousstepsorExpressVIsasthelimits.InputScalars—UsesoutputscalarvaluesfrompreviousstepsorExpressVIsasthelimits.YouspecifythescalarvaluesontheInputpage.UserDefinedSignals—Usessignalsyoudefineforthelimits.IfyousetLimitswindowbasedontoTwoLimits,clicktheDefineupperlimitandDefinelowerlimitbuttonstodisplaytheDefineSignaldialogboxandinteractivelydefinethelimitsignals.IfyousetLimitswindowbasedontoSingleLimit&Range,clicktheDefinesinglelimitbuttontodisplaytheDefineSignaldialogboxandinteractivelydefinethelimitsignal.UserDefinedConstants—(Default)Usesconstantvaluesthatyouspecifyforthelimits.IfyousetLimitswindowbasedontoTwoLimits,usetheUpperconstantandLowerconstantfieldstospecifythelimits.IfyousetLimitswindowbasedontoSingleLimit&Range,usetheLimitconstantfieldtospecifythelimit.

Comparemode—SpecifiesthecomparisonmodeLimitTestusestocomparetheinputsignaltothelimitsyouspecify.Youcanselectfromthefollowing

options:BetweenLimits—(Default)Determineswhethertheinputsignalisbetweenthelimitsyouspecify.OutsideLimits—Determineswhethertheinputsignalisoutsidethelimitsyouspecify.>LowerLimit—Determineswhethertheinputsignalisabovethelowerlimityouspecify.<UpperLimit—Determineswhethertheinputsignalisbelowtheupperlimityouspecify.

Limitswindowbasedon—Specifieshowyoudefinethelimitsusedforthelimittest.Youcanselectfromthefollowingoptions:

TwoLimits—Specifiesthatyoudefinetwolimitsforthelimittest.SingleLimit&Range—Specifiesthatyoudefineasinglelimitandarangeofgainandoffsetvaluesforthelimittest.

Upperconstant—[Limitssource:UserDefinedConstantsANDLimitswindowbasedon:TwoLimits]Specifiesthevalueoftheupperlimitconstant.Thedefaultis1.Lowerconstant—[Limitssource:UserDefinedConstantsANDLimitswindowbasedon:TwoLimits]Specifiesthevalueofthelowerlimitconstant.Thedefaultis–1.Limitconstant—[Limitssource:UserDefinedConstantsANDLimitswindowbasedon:SingleLimit&Range]

Specifiesthesingleconstantvaluethat,inconjunctionwiththeRelativeRangeSpecs,definesthelimitvalues.Defineupperlimit—[Limitssource:UserDefinedSignalsANDLimitswindowbasedon:TwoLimits]DisplaystheDefineSignaldialogbox,whichyoucanusetodefinetheupperlimitsignalinteractively.Definelowerlimit—[Limitssource:UserDefinedSignalsANDLimitswindowbaseon:TwoLimits]DisplaystheDefineSignaldialogbox,whichyoucanusetodefinethelowerlimitsignalinteractively.Definesinglelimit—[Limitssource:UserDefinedSignalsANDLimitswindowbaseon:SingleLimit&Range]DisplaystheDefineSignaldialogbox,whichyoucanusetodefinethelimitsignalinteractively.

RelativeRangeSpecs—Containsthefollowingoptions:

Uppergain—[Limitswindowbaseon:SingleLimit&Range]Specifiesthegainvaluetoapplytothesinglelimittocalculatetheupperlimit.Thedefaultis1.1.Lowergain—[Limitswindowbaseon:SingleLimit&Range]Specifiesthegainvaluetoapplytothesinglelimittocalculatethelowerlimit.Thedefaultis900m.Upperoffset—[Limitswindowbaseon:SingleLimit&Range]Specifiestheoffsetvaluetoaddtothesinglelimittocalculatetheupperlimit.Thedefaultis0.Loweroffset—[Limitswindowbaseon:

SingleLimit&Range]Specifiestheoffsetvaluetoaddtothesinglelimittocalculatethelowerlimit.Thedefaultis0.

Advanced Containsthefollowingoptions:LimitsInclusion—Containsthefollowingoptions:

Upperinclusive—Specifieswhetheravaluethatisexactlyonorequaltotheupperlimitpassesthelimittest.Placeacheckmarkinthischeckboxtopassavaluethatisonorequaltotheupperlimit.Lowerinclusive—Specifieswhetheravaluethatisexactlyonorequaltothelowerlimitpassesthelimittest.Placeacheckmarkinthischeckboxtopassavaluethatisonorequaltothelowerlimit.

Timinginformation—Containsthefollowingoptionsfortime-domainandfrequency-domainsignals:

Freq.axisislogarithmic—Setsthedisplaygraphfrequencyaxistologarithmicand,whentheLimitssourceisUserDefinedSignals,computesthelimitvaluesbetweenthedefinitionpointssotheresultingsegmentappearsasastraightlineinalogarithmicfrequencyrepresentation.Forexample,youcanusethistocreateasymptoticlimitsfittingfilterroll-offindecibelsperdecade.Thisparameterappearsonlyiftheinputsignalisafrequency-domainsignal.Ignoretimestamp—Forcesthetimestampoftheinputsignalto0soyoucandefinethelimitsignalsrelativetothebeginningoftheinputsignal.This

parameterappearsonlyiftheinputsignalisatime-domainsignal.

Actions Containsthefollowingoptions:Actiononfailed—Containsthefollowingoptions:

Stopprojectafterfailedoccurs—Specifiestostoprunningtheprojectafterthesignalfailsthelimittestthenumberoftimesyouspecify.times—SpecifiesthenumberoftimesforthesignaltopassorfailthelimittestbeforeLabVIEWSignalExpressstopstheproject.Actiononfailed—Specifiestheactiontoperformwhenthesignalfailsthelimittestthenumberoftimesyouspecify.

none—Specifiestotakenoadditionalaction.snapshotofinputs—SpecifiestotakeasnapshotofthecurrentinputsoftheLimitTeststep.snapshotofallsignalsinproject—Specifiestotakeasnapshotofallsignalsintheproject.

Actiononpassed—Containsthefollowingoptions:

Stopprojectafterpassedoccurs—Specifiestostoprunningtheprojectafterthesignalpassesthelimittestthenumberoftimesyouspecify.times—SpecifiesthenumberoftimesforthesignaltopassorfailthelimittestbeforeLabVIEWSignalExpressstopstheproject.Actiononpassed—Specifiestheaction

toperformwhenthesignalpassesthelimittestthenumberoftimesyouspecify.

none—Specifiestotakenoadditionalaction.snapshotofinputs—SpecifiestotakeasnapshotofthecurrentinputsoftheLimitTeststep.snapshotofallsignalsinproject—Specifiestotakeasnapshotofallsignalsintheproject.

LimitTestDetailsOutputSignalTypesLimitTestreturnsagroupofsignalsnamedlimittestresults.Thisgroupofsignalscontainsthefollowingelements:

failedsignal—Theinputsignal(s)orvalue(s).Ifyougraphfailedsignal,thegraphincludestheinputsignal,thelimits,andtheportionsofthesignalthatfailedthelimittest.upperlimit—Theupperlimitusedtoperformthelimittest.lowerlimit—Thelowerlimitusedtoperformthelimittest.

LimitsThetypeoflimitsyoucandefinefortheLimitTestdependontheinputsignaltype.Iftheinputisatime-domainorfrequency-domainsignal,youcanusethefollowingtypesoflimits:

Outputsignalsofthesametypeastheinputsignal—YoucanuseoutputsignalsfromotherLabVIEWSignalExpressstepsorLabVIEWVIsasthelimits.Forexample,youcancompareatime-domainsignaltotwoothertime-domainsignals.Outputscalarvalues—YoucanuseoutputscalarvaluesfromotherLabVIEWSignalExpressstepsorLabVIEWVIsasthelimits.LimitTestcomparestheinputsignaltothescalarvalueselementbyelement.Forexample,youcancompareatime-domainsignaltotwomeasuredDCvalues.User-definedsignalsofthesametypeastheinputsignal—YoucandefinelimitsignalsbyclickingtheDefineUpperLimit,DefineLowerLimit,orDefineSingleLimitbuttons.TheDefineSignaldialogboxappears,andyoucandefinealimitsignalbasedonuser-definedpoints.Usethisdialogboxtocreatealimitsignalmadeupofaseriesoflinesegmentsthatconnectthesepoints.User-definedconstants—Youcandefineconstantvaluesforthelimits.LimitTestcomparestheinputsignaltotheconstantvalueselementbyelement.

Iftheinputisascalarvalue,youcanusethefollowingtypesoflimits:Outputscalarvalues—YoucanuseoutputscalarvaluesfromotherLabVIEWSignalExpressstepsorLabVIEWVIsasthelimits.LimitTestcomparestheinputsignaltothescalarvalueselementbyelement.Forexample,youcancompareatime-domainsignaltotwomeasuredDCvalues.User-definedconstants—Youcandefineconstantvaluesforthelimits.LimitTestcomparestheinputvaluetotheconstantvalues.

CompareModeandLimitsInclusionLimitTesthasfourcomparemodes.Thesemodesindicateifasignalorvalueisbetweenlimits,outsidelimits,greaterthanalowerlimit,orlowerthananupperlimit.Youcanchoosetheexactlimitvaluestoincludeornotincludeinthetest.Theselimitvaluesresultinafailingorpassingtestwheretheinputvalueequalsthelimitvalue.

DefiningaLimitRangefromaSingleLimitYoucandefineasetofupperandlowerlimitsfromasinglelimitusingthegainandoffsetscalingparameters.SelectthelimitsbasedonSingleLimit&Rangetoenabletheuser-definedscalingparameters.

LimitsDefinedinaLogarithmicFrequencyScaleWhenyouuseuser-definedsignalsaslimitsforafrequency-domainsignal,LimitTestdefinesthelimitsasaseriesoflinesegmentsthatconnectuser-definedpoints.Bydefault,LimitTestassumesthefrequencyaxisislinearsoalinearrelationshipexistsbetweenthefrequencyandthemagnitudeorphasevalues.TheFreq.axisislogarithmiccheckboxspecifieswhethertodisplayalogarithmicfrequencyaxisanddefinethelimitsignalssotheconnectionbetweenthepointsappearsasstraightlinesinthelogarithmicfrequencyscale.Youcandefinethelimitsinalogarithmicfrequencyscaleifyouwanttotesttheasymptoticroll-offofafilter,typicallyastraightlineinadecibelversuslogarithmicfrequencyscale.

DigitalCompareComparesareferenceandtestsignaltodeterminethenumberofsampleerrors.

Parameter DescriptionDigitalwaveformpreview

Displaysthetwowaveformstobecompared.

Signalnamepreview

DisplaysthesignalnamesassociatedwiththesignalsintheDigitalwaveformpreview.

DigitalpreviewYscrollbar

ScrollbarthatallowsyoutoscrollthroughtheDigitalwaveformpreview.

Input Containsthefollowingoptions:Referencewaveform—Displaysthesignalthatwillserveasthereferenceforyourcomparison.Sampleerrorsareproducedwhenthetestwaveformdiffersfromthiswaveform.Testwaveform—Displaysthesignalyouwanttocomparetothereferencesignal.Sampleerrorsareproducedwhenthetestwaveformdiffersfromthereferencewaveform.

Configuration Containsthefollowingoptions:ComparisonStartPosition—Containsthefollowingoptions:

Referencewaveformstart—Specifiesthepositionofthesamplewhereyouwanttostartthesignalcomparison.Testwaveformstart—Specifiesthepositionofthesamplewhereyouwanttostartthesignalcomparison.

Comparesubset—Specifieswhetheryouwanttocomparetheentiretestsignaltothereferencesignalorwhetheryouonlywanttocompareasubsetofthesamples.Selectingthischeckbox

meansthatasubsetthatisthenumberofsamplesspecifiedinNumberSampleswillbecompared,startingatthereferencewaveformstartpositionyouspecify.Numberofsamples—SpecifiesthenumberofsamplesinthesubsettheVIcompares.Passed—Displaystheresultofthewaveformcompare.Ifallspecifiedsamplesmatch,thecomparepasses.Otherwise,thecomparefails,andthenumberofsampleerrorsisreturnedinNumberofSampleErrors.NumberofSampleErrors—Returnsthenumberofsampleerrorsinthetestsignal.

ExecutionControlUsetheExecutionControlstepstomanipulatetheexecutionofstepsordevices.

Toviewrelatedtopics,clicktheLocatebutton,shownatleft,inthetoolbaratthetopofthiswindow.TheLabVIEWSignalExpressHelphighlightsthistopicintheContentstabsoyoucannavigatetherelatedtopics.

SweepPerformsasweepoperationonthesignalsorparametersyouselect.Asweepiteratesasetofmeasurementstepsthenumberoftimesyouspecify.Eachiterationmodifiesoneormoreparametersofoneormorestepsofthemeasurement.

Parameter DescriptionSweepConfiguration

Containsthefollowingoptions:Sweepableparameters—Displaystheparameterstosweep.TheParameterNamecolumndisplaysthenameoftheparameter.TheStepNamecolumndisplaysthestepthatusestheparameter.TheAffectedOutputcolumndisplaystheoutputsignals,ifany,thatthesweepoperationaffects.TheAliascolumndisplaysthenametouseintheFormulafieldwhenyoureferencetheparameter.AliasdisplaysanameonlywhenyousetTypetoFormula.Add—AddsaparametertotheSweepableparameters.Remove—RemovestheselectedparameterfromtheSweepableparameters.Configuration—Containsthefollowingoptions:

Type—Specifiesthetypeofsweeptoperform.Youcanselectfromthefollowingoptions:

Linear—(Default)Incrementstheselectedparameterbyauniformvalueforeachiterationofthesweep.TheincrementalvalueistheuniformdistancebetweenpointsthatmapstheNumberofpointsbetweentheStartandStopvaluesyouspecify.Exponential—Incrementstheselectedparameterbyavaluethatgrowsexponentiallywith

eachiterationofthesweep.ListofPoints—AdjuststhevalueoftheselectedparametertothenextvalueintheDataPointslistwitheachiterationofthesweep.FromFile—Adjuststhevalueoftheselectedparametertothenextvalueinthefilewitheachiterationofthesweep.Formula—IncrementstheselectedparameterusingtheFormulayouspecifyfortheNumberofpointsyouspecify.

Formula—[Type:Formula]Specifiesaformulayoucanusetocontroltheselectedparameter.Validformulaparametersarex,whichfollowsalinearsweepcharacteristicbasedonthevaluesspecifiedbyStartx,StopxandNumberofPoints,andanyaliasx1,x2,andsoonthatisdefinedandvisibleintheAliascolumn.Forexample,ifyousweeptwoparameters,x1andx2,youcandefineasweepformulatocontrolthesweepingvaluesofx2dependingonxandx1.Forexample,intheFormulafield,enter2*x1+3*x^2toachievealineardependencytox1andquadraticdependencytox.TheSweepPointsgraphsdisplaystheresultingsweepingcharacteristic.

NoteAformulacanreferenceonlyanaliasinapreviouslysweptparameter.

Start—[Type:Linear,Exponential]Specifiesthestartvalueoftheselected

Sweepableparameter.Thedefaultis1.Stop—[Type:Linear,Exponential]SpecifiesthestopvalueoftheselectedSweepableparameter.Thedefaultis2.Startx—[Type:Formula]SpecifiesthestartvalueofthexparameterwhenyouusetheFormulasweeptype.LabVIEWSignalExpressalwayssweepsthexparameterlinearly.Stopx—[Type:Formula]SpecifiesthestopvalueofthexparameterwhenyouusetheFormulasweeptype.NumberofPoints—[Type:Linear,Exponential,Formula]Specifiesthenumberofpoints,includingthestartandstoppoint,tousetoperformthesweep.Thedefaultis2.SweepPoints—Displaysapreviewofthecalculatedpoints.ThewayLabVIEWSignalExpresscalculatesthepointsdependsontheTypeyouspecify.

[Type:Linear,Exponential]—CalculatespointsbasedonthevaluesyouspecifyintheStart,Stop,andNumberofPointsfields.[Type:ListofPoints]—CalculatespointsbasedonthevaluesintheDataPointslist.[Type:FromFile]—Calculatespointsbasedonthepointsspecifiedinthefile.[Type:Formula]—CalculatespointsbasedonthevaluesyouspecifyintheStartx,Stopx,andNumberofPointsfields.

DataPoints—[Type:ListofPoints]

Containsvaluesthatdefinethepointsinthesweep.Insert—[Type:ListofPoints]InsertsanewpointintheDataPointslistabovetheselectedpoint.Delete—[Type:ListofPoints]RemovestheselectedpointfromtheDataPointslist.Pathtosweepfile—[Type:FromFile]Specifiesthelocationofthetextfilethatcontainsthesweeppointsyouwanttouse.Thetextfilemustcontainasinglecolumnofvalues.Youcanaddcommentstoeachlineofthefilebyusingasemicolondelimiterbetweenasweeppointandacomment.

SweepOutput

Containsthefollowingoptions:Outputsofthesweep—Displaysthelistofdatatoaccumulatefromeachiterationofthesweep.TheoutputsyouaddtothislistappearasoutputsofthestepintheProjectView.Add—AddsoutputstotheOutputsofthesweeplist.ClickingthisbuttondisplaystheEditSweepOutputdialogbox.Remove—RemovestheselectedoutputfromtheOutputsofthesweeplist.Edit—DisplaystheEditSweepOutputdialogboxfortheselectedsweepoutput.Outputoptions—Containsthefollowingoptions:

Y-AxisLabel(Range)—Specifiesalabelforthey-axisoftheselectedoutput.X-AxisLabel(Domain)—Specifiesalabelforthex-axisoftheselectedoutput.Usedefault—Specifiestowhethertousethedefaultlabelfortheaxis.Removethecheckmarkfromthis

checkboxtospecifyacustomlabel.Exportiterationindex—Specifieswhethertoincludethecurrentiterationindexasanoutputofthestep.

ConditionalRepeatRepeatsthesequenceofstepsinsidetheloopuntiloneormoreconditionsaremet.Toaddacondition,clicktheAddbuttonintheInputConfigurationsectionandselectanappropriateinputvariable.ThevariablecanbeaBooleanorscalarresult.YoucanuseaBooleansignalasanexitconditiondirectly,oryoucancompareascalarvaluetoaconstantvalue.SelectthecomparisoncriteriausingtheCriterionpull-downmenu.YoucancombineseveralconditionsintoasingleexitconditionusingGroupoperation.SelectANDifyouwanttoexittheloopwhenalltheconditionsaretrue.SelectORifyouwanttoexitassoonasatleastoneoftheconditionsismet.YoucaninverttheexitconditionbyremovingthecheckmarkintheExitifTruecheckbox.

Parameter DescriptionInputConfiguration

Containsthefollowingoptions:Add—Addsaninputvariabletotheconditionlist.Remove—Removestheinputvariableyouselectfromtheconditionlist.Loopconditions—DisplaysthecurrentconditionsfortheConditionalRepeatstep.Inputsignal—Specifiestheinputsignal(variable)tobeusedwiththespecifiedconditions.Criterion—Specifiesthecomparisoncriterionfortheselectedinputscalarvariable.Value—Constantvalueusedtocomparewiththeselectedvariable.Invertinput—InvertstheselectedinputBooleanvariable.

ExitCondition

Containsthefollowingoptions:Groupoperation—CombinesseveralconditionsintoanExitcondition.SelectANDifyouwanttoexittheloopwhenalltheconditionsaretrue.SelectORifyouwanttoexitassoonasatleastoneoftheconditionsismet.

ExitifTrue—Determinesiftheloopexitswhentheoverallexitconditionistrueorfalse.

TriggerExtractsasectionofacontinuoussignalbasedonaspecifiedtrigger.Thisstepswaitsuntilasignalmeetsatriggerconditionandreturnsasectionofthesignalthatstartsatthetriggerpoint,orbeforethetriggerpointifyouspecifyPre-triggersamples.Thisstepreturnsatriggeredsignalthatalwaysisthesamesizeastheinputsignalbeforethetrigger,sotheinputsignalmustprovideenoughdataafterthetriggeroccursforthesteptoreturnasignalofthatsize.Iftheinputsignaldoesnotprovideenoughdata,thissteptimesout.Details

Parameter DescriptionInputSignal Displaystheinputsignal.

Displayedsignal—Specifiesthesignal(s)todisplayinthepreviewgraph(s).Thisoptionappearsonlywhenyouselectagroupofsignalsfortheinput.

NoteIftheinputsignalsincludescalarvaluesthatdependonthevaluesofinputwaveformsignals,youcannotspecifytodisplayallsignalsinthepreviewgraph(s).

OutputSignal Displaystheoutputsignal.Input Containsthefollowingoption:

Inputsignal—Specifiestheinputvalue.

Configuration Containsthefollowingoptions:Triggermode—SpecifieswhichconditionthespecifiedsignalmustmeetforLabVIEWSignalExpresstobeginextractingthesignal.

PositiveEdge—SpecifiesforthetriggertooccurwhenasignalcrossesthespecifiedLevelwithapositiveslope.NegativeEdge—SpecifiesforthetriggertooccurwhenasignalcrossesthespecifiedLevelwithanegativeslope.EnteringWindow—Specifiesforthe

triggertooccurwhenasignalentersthewindowbetweenthespecifiedHighlevelandLowlevelvalues.LeavingWindow—SpecifiesforthetriggertooccurwhenasignalexitsthewindowbetweenthespecifiedHighlevelandLowlevelvalues.

Level—Specifiesthelevelthatthesignalmustmeettotriggertheinputsignal.Highlevel—Specifiesthehigherlimitoftherangetotriggerthespecifiedsignal.Lowlevel—Specifiesthelowerlimitoftherangetotriggerthespecifiedsignal.Hysteresis—SpecifiestheamountaboveandbelowTriggerlevelthroughwhichthespecifiedsignalmustpassbeforeatriggerlevelcrossingisdetected.Thedefaultis0.Usetriggerhysteresistopreventnoisefromcausingafalsetrigger.Triggersignal—Specifiesthechanneltousetosearchforthetriggerwhentheinputisagroupedsignal.Thedefaultisthefirstchannelinthegroup.Pre-triggersamples—Specifiesthenumberofpre-triggersamplesperchanneltoacquirebeforethereferencetriggerpoint.DevicesthatNI-DAQmxsupportsrequirePre-triggersamplestohaveaminimumvalueof2.Post-triggersamplesequalSamplestoread–Pre-triggersamples.Thedefaultis2.Timeout(s)—Specifiesthehardwaretimeoutvalueinseconds.Thedefaultis10.Triggerfound—ReturnsTRUEifatriggerhasbeenfoundintheinputsignal.ReturnsFALSEifnotriggerisfound.

TriggerDetailsThisstepcanreturnatimeouterrorunderthefollowingconditions:

YouspecifyatriggerLevelthattheinputsignaldoesnotmeet.Atriggeroccursbuttheinputsignaldoesnotprovideenoughdataafterthetriggeroccursforthesteptoreturnasignalofthesamesizeastheinputsignal.

SequenceControlstheexecutionofaprojectbyalternatelyexecutingandpausingsteps.TheSequencestepcanpausetheexecutionofstepsinaprojectwithoutstoppingtheexecutionoftheentireproject.Forexample,youcanusetheSequencesteptopausetheexecutionofastepthatacquiresasignalfromahardwaredevicesothatanotherstepintheprojectcanusethesamehardwaredevice.IfyouselectRunprecedingstepsbeforefollowingsteps,theSequencestepallowsstepsthatprecedetheSequencesteptoexecuteonce,thenpausestheexecutionofthosestepsandallowsthestepsthatfollowtheSequencesteptoexecuteonce,andsoon.IfyouselectStartasequenceorEndasequence,theSequencestepbecomesthebeginningorendofasequenceanddoesnotaffecttheexecutionofanystepsthatappearbeforeorafterthesequenceintheProjectView.UsetheStartasequenceandEndasequenceoptionswhenyouwanttoallowstepsoutsideofthesequencetoruncontinuously,suchasifyouwanttogenerateasignalcontinuously.

NoteWhenyouusetheSequencesteptoreusehardware,youcannotperformacontinuoussignalacquisitionbecauseLabVIEWSignalExpressstopsandstartsthehardwaredevice.

Parameter DescriptionConfiguration Containsthefollowingoptions:

Runprecedingstepsbeforefollowingsteps—SpecifieswhetherSequenceforcesallthestepsthatprecedeitinthesequencetorunbeforeallthestepsthatfollowit.

Allowhardwarereuse—SpecifieswhetherstepsthatfollowtheSequencestepinthecurrentsequencecanusethesamehardwareasstepsthatprecedetheSequencestep.Placeacheckmarkinthischeckboxtoenablehardwarereuse.

Startasequence—SpecifieswhethertheSequencestepstartsanewsequence.Ifyou

selectthisoption,theSequencestepstartsanewsequenceinanewexecutionloop.Endasequence—SpecifieswhethertheSequencestependsasequence.Ifyouselectthisoption,theSequencestependsthecurrentsequenceandclosesthecurrentexecutionloop.Updatesignalviewsaftereachiteration—Updatesthesignalviews,includingdisplaysontheDataViewtabandpreviewgraphsontheStepSetuptab,eachtimetheSequencestepexecutes.IfyouselectDisplaymessageateachiteration,thisoptionenablestheusertoseeupdatedsignalvalueswhenLabVIEWSignalExpresspausestheproject.

Action Containsthefollowingoptions:Displaymessageateachiteration—SpecifieswhetherLabVIEWSignalExpresspausestheexecutionofthesequenceanddisplaysamessagetotheusereachtimetheSequencestepexecutes.Ifyouplaceacheckmarkinthischeckbox,theLabVIEWSignalExpressdialogboxappearsateachiterationtodisplaythemessageandprompttheusertocontinueorstoprunningtheproject.Thisdialogboxalsogivestheusertheoptiontocreateasnapshotofthesignalsintheproject.

MessageText—SpecifiesthetexttodisplayinthemessagethatappearseachtimetheSequencestepexecutes.

Timing Containsthefollowingoptions:Pre-executiondelay—Specifiestheamountoftimeinmillisecondstowaitbeforethestepexecutes.Post-executiondelay—Specifiestheamountoftimeinmillisecondstowaitafterthestepexecutes.

RunLabVIEWVIUsetheRunLabVIEWVIstepstorunaLabVIEWVIintheLabVIEWSignalExpressenvironment.

Toviewrelatedtopics,clicktheLocatebutton,shownatleft,inthetoolbaratthetopofthiswindow.TheLabVIEWSignalExpressHelphighlightsthistopicintheContentstabsoyoucannavigatetherelatedtopics.

RunLabVIEW7.1VIRunsaLabVIEW7.1VIintheLabVIEWSignalExpressenvironment.LabVIEWSignalExpressassumesallcontrolsontheconnectorpaneoftheVIyouspecifyareparameters.Ifthereareinputsavailable,usetheConnectInputbuttontospecifyacontrolLabVIEWSignalExpresscanusetopassdatatoyourVI.YoumustusetheversionoftheRunLabVIEWVIstepthatmatchestheversionofLabVIEWyousavedyourVIin.Forexample,ifyousavedaVIinLabVIEW7.1,youmustusetheRunLabVIEW7.1VIstep.IfyouuseaVIthatcontainsaparameterwithanX-Yarraydatatype,theoutputmustbeaclusterindicator,notagraphindicator.Thex-arraymustbethefirstcomponentinthecluster,andthey-arraymustbethesecondcomponentinthecluster.Youmustrepresentbothcomponentsintheclusterasnumericdoubles.LabVIEWSignalExpresscanacceptavarietyofdatatypes.YoucanbuildaRunLabVIEWVIstepfromanexistingVIoryoucanstartfromatemplate.

Parameter DescriptionSettings Containsthefollowingoptions:

SelectVI—SpecifiesthepathtotheVIyouwanttouseasastepintheLabVIEWSignalExpressenvironment.Runthisstepautomatically—RunstheVIassoonasyoumakeachangetothefrontpanel.RefreshVI—ReloadstheVIfromdisk,scanstheVIforanychangesmadewhileusingLabVIEWSignalExpress,andupdatestheRunLabVIEWVIstepwithanychanges.IfyouarerunningaprojectinLabVIEWSignalExpress,youmustclicktheStopbuttonbeforeyouclicktheRefreshVIbuttonfortheselectedVItosuccessfullyupdate.Controlname—SpecifieswhichinputsoftheVItodesignateassignalinputsfromtheLabVIEWSignalExpressproject.IfyouwanttopassdatafromadifferentstepoftheprojectintotheVI,usean

inputsignal.LabVIEWSignalExpressassumesallcontrolsontheconnectorpaneoftheVIyouspecifyareparameters.Aninputsignalisavaluethatcomesfromapreviousstep.YoucannoteditthatinputsignalonthefrontpaneloftheVI.ConnectInput—SpecifiesacontrolLabVIEWSignalExpresscanusetopassdatatotheVI.DisconnectInput—RemovestheinputfromtheControlNamelistbox.Inputsignal—Listsareferencetoasignalfromapreviousstep.Outputs—ListstherecognizedoutputsoftheVIthatreturndatatotheproject.TheseoutputsmustbeonthefrontpaneloftheVI,matchoneoftheLabVIEWSignalExpresssignaltypes,andbeconnectedtotheVIconnectorpane.Stricttypeofoutputdata—SpecifiesthesignaltypeoftheoutputfromtheVI.Youmustspecifyastrictsignaltypetoguaranteethatotherstepsintheprojectcanacceptthesignalasaninputandproperlyoperateonit.

ConfigureVI

DisplaysthefrontpaneloftheVIyouselectedontheSettingstab.

ExecutionControl

Containsthefollowingoptions:Startthisstepafter—Makesthestepwaituntilanotherstephasstartedbeforeexecuting.Youcanmakethestepwaitonanyotherhardwarestepintheprojectbyselectingthesteptowaitonfromthepull-downmenu.

Youcanusethisoptiontoforceanacquisitiondevicetostartafteragenerationdevicestarts.Youalsocanusethisoptiontoensurethatadevicegeneratingatriggersignalstartsafterthedevicereceivingthesignal,whichavoidssendingthesignalbeforethereceiverisready.Steptowaitfor—Liststhepossiblestepsforwhich

thisstepcanwait.Pre-executiondelay(ms)—Specifiestheamountoftimetowaitbeforethestepexecutes.Ifyouconfigurethesteptostartafteranotherstep,thedelayrepresentstheamountoftimetowaitafterthespecifiedstepstarts.Post-executiondelay(ms)—Specifiestheamountoftimetowaitafterthestepexecutes.Timingtype—Containsthefollowingoptionsthatspecifyhowtheoutputsignalofthestepistimed:

Untimed—Specifiesthattheoutputsignalisnottimed.Selectthisoptioniftheoutputsignalisnotascalarvalueoratime-continuouswaveform.Continuous—Specifiesthattheoutputsignalistimedcontinuously.Selectthisoptioniftheoutputsignalisatime-continuouswaveform.Periodic—Specifiesthattheoutputsignalistimedperiodically.SelectthisoptioniftheoutputsignalisascalarvalueandyouwanttoforcethesteptorunatarateyouspecifyinSampleperiod(s).Sampleperiod(s)—[Timingtype:Periodic]Specifiesthesampleperiodtouseforaperiodicoutputsignal.SetSampleperiod(s)to0torunthestepasfastaspossible.

RunLabVIEW8.0VIRunsaLabVIEW8.0VIintheLabVIEWSignalExpressenvironment.LabVIEWSignalExpressassumesallcontrolsontheconnectorpaneoftheVIyouspecifyareparameters.Ifthereareinputsavailable,usetheConnectInputbuttontospecifyacontrolLabVIEWSignalExpresscanusetopassdatatoyourVI.YoumustusetheversionoftheRunLabVIEWVIstepthatmatchestheversionofLabVIEWyousavedyourVIin.Forexample,ifyousavedaVIinLabVIEW7.1,youmustusetheRunLabVIEW7.1VIstep.IfyouuseaVIthatcontainsaparameterwithanX-Yarraydatatype,theoutputmustbeaclusterindicator,notagraphindicator.Thex-arraymustbethefirstcomponentintheclusterandthey-arraymustbethesecondcomponentinthecluster.Youmustrepresentbothcomponentsintheclusterasnumericdoubles.LabVIEWSignalExpresscanacceptavarietyofdatatypes.YoucanbuildaRunLabVIEWVIstepfromanexistingVIoryoucanstartfromatemplate.

Parameter DescriptionSettings Containsthefollowingoptions:

SelectVI—SpecifiesthepathtotheVIyouwanttouseasastepintheLabVIEWSignalExpressenvironment.Runthisstepautomatically—RunstheVIassoonasyoumakeachangetothefrontpanel.RefreshVI—ReloadstheVIfromdisk,scanstheVIforanychangesmadewhileusingLabVIEWSignalExpress,andupdatestheRunLabVIEWVIstepwithanychanges.IfyouarerunningaprojectinLabVIEWSignalExpress,youmustclicktheStopbuttonbeforeyouclicktheRefreshVIbuttonfortheselectedVItosuccessfullyupdate.Controlname—SpecifieswhichinputsoftheVItodesignateassignalinputsfromtheLabVIEWSignalExpressproject.IfyouwanttopassdatafromadifferentstepoftheprojectintotheVI,usean

inputsignal.LabVIEWSignalExpressassumesallcontrolsontheconnectorpaneoftheVIyouspecifyareparameters.Aninputsignalisavaluethatcomesfromapreviousstep.YoucannoteditthatinputsignalonthefrontpaneloftheVI.ConnectInput—SpecifiesacontrolLabVIEWSignalExpresscanusetopassdatatotheVI.DisconnectInput—RemovestheinputfromtheControlNamelistbox.Inputsignal—Listsareferencetoasignalfromapreviousstep.Outputs—ListstherecognizedoutputsoftheVIthatreturndatatotheproject.TheseoutputsmustbeonthefrontpaneloftheVI,matchoneoftheLabVIEWSignalExpresssignaltypes,andbeconnectedtotheVIconnectorpane.Stricttypeofoutputdata—SpecifiesthesignaltypeoftheoutputfromtheVI.Youmustspecifyastrictsignaltypetoguaranteethatotherstepsintheprojectcanacceptthesignalasaninputandproperlyoperateonit.

ConfigureVI

DisplaysthefrontpaneloftheVIyouselectedontheSettingstab.

ExecutionControl

Containsthefollowingoptions:Startthisstepafter—Makesthestepwaituntilanotherstephasstartedbeforeexecuting.Youcanmakethestepwaitonanyotherhardwarestepintheprojectbyselectingthesteptowaitonfromthepull-downmenu.

Youcanusethisoptiontoforceanacquisitiondevicetostartafteragenerationdevicestarts.Youalsocanusethisoptiontoensurethatadevicegeneratingatriggersignalstartsafterthedevicereceivingthesignal,whichavoidssendingthesignalbeforethereceiverisready.Steptowaitfor—Liststhepossiblestepsforwhich

thisstepcanwait.Pre-executiondelay(ms)—Specifiestheamountoftimetowaitbeforethestepexecutes.Ifyouconfigurethesteptostartafteranotherstep,thedelayrepresentstheamountoftimetowaitafterthespecifiedstepstarts.Post-executiondelay(ms)—Specifiestheamountoftimetowaitafterthestepexecutes.Timingtype—Containsthefollowingoptionsthatspecifyhowtheoutputsignalofthestepistimed:

Untimed—Specifiesthattheoutputsignalisnottimed.Selectthisoptioniftheoutputsignalisnotascalarvalueoratime-continuouswaveform.Continuous—Specifiesthattheoutputsignalistimedcontinuously.Selectthisoptioniftheoutputsignalisatime-continuouswaveform.Periodic—Specifiesthattheoutputsignalistimedperiodically.SelectthisoptioniftheoutputsignalisascalarvalueandyouwanttoforcethesteptorunatarateyouspecifyinSampleperiod(s).Sampleperiod(s)—[Timingtype:Periodic]Specifiesthesampleperiodtouseforaperiodicoutputsignal.SetSampleperiod(s)to0torunthestepasfastaspossible.

RunLabVIEW8.2VIRunsaLabVIEW8.2VIintheLabVIEWSignalExpressenvironment.LabVIEWSignalExpressassumesallcontrolsontheconnectorpaneoftheVIyouspecifyareparameters.Ifthereareinputsavailable,usetheConnectInputbuttontospecifyacontrolLabVIEWSignalExpresscanusetopassdatatoyourVI.YoumustusetheversionoftheRunLabVIEWVIstepthatmatchestheversionofLabVIEWyousavedyourVIin.Forexample,ifyousavedaVIinLabVIEW7.1,youmustusetheRunLabVIEW7.1VIstep.IfyouuseaVIthatcontainsaparameterwithanX-Yarraydatatype,theoutputmustbeaclusterindicator,notagraphindicator.Thex-arraymustbethefirstcomponentintheclusterandthey-arraymustbethesecondcomponentinthecluster.Youmustrepresentbothcomponentsintheclusterasnumericdoubles.LabVIEWSignalExpresscanacceptavarietyofdatatypes.YoucanbuildaRunLabVIEWVIstepfromanexistingVIoryoucanstartfromatemplate.

Parameter DescriptionSettings Containsthefollowingoptions:

SelectVI—SpecifiesthepathtotheVIyouwanttouseasastepintheLabVIEWSignalExpressenvironment.Runthisstepautomatically—RunstheVIassoonasyoumakeachangetothefrontpanel.RefreshVI—ReloadstheVIfromdisk,scanstheVIforanychangesmadewhileusingLabVIEWSignalExpress,andupdatestheRunLabVIEWVIstepwithanychanges.IfyouarerunningaprojectinLabVIEWSignalExpress,youmustclicktheStopbuttonbeforeyouclicktheRefreshVIbuttonfortheselectedVItosuccessfullyupdate.Controlname—SpecifieswhichinputsoftheVItodesignateassignalinputsfromtheLabVIEWSignalExpressproject.IfyouwanttopassdatafromadifferentstepoftheprojectintotheVI,usean

inputsignal.LabVIEWSignalExpressassumesallcontrolsontheconnectorpaneoftheVIyouspecifyareparameters.Aninputsignalisavaluethatcomesfromapreviousstep.YoucannoteditthatinputsignalonthefrontpaneloftheVI.ConnectInput—SpecifiesacontrolLabVIEWSignalExpresscanusetopassdatatotheVI.DisconnectInput—RemovestheinputfromtheControlNamelistbox.Inputsignal—Listsareferencetoasignalfromapreviousstep.Outputs—ListstherecognizedoutputsoftheVIthatreturndatatotheproject.TheseoutputsmustbeonthefrontpaneloftheVI,matchoneoftheLabVIEWSignalExpresssignaltypes,andbeconnectedtotheVIconnectorpane.Stricttypeofoutputdata—SpecifiesthesignaltypeoftheoutputfromtheVI.Youmustspecifyastrictsignaltypetoguaranteethatotherstepsintheprojectcanacceptthesignalasaninputandproperlyoperateonit.

ConfigureVI

DisplaysthefrontpaneloftheVIyouselectedontheSettingstab.

ExecutionControl

Containsthefollowingoptions:Startthisstepafter—Makesthestepwaituntilanotherstephasstartedbeforeexecuting.Youcanmakethestepwaitonanyotherhardwarestepintheprojectbyselectingthesteptowaitonfromthepull-downmenu.

Youcanusethisoptiontoforceanacquisitiondevicetostartafteragenerationdevicestarts.Youalsocanusethisoptiontoensurethatadevicegeneratingatriggersignalstartsafterthedevicereceivingthesignal,whichavoidssendingthesignalbeforethereceiverisready.Steptowaitfor—Liststhepossiblestepsforwhich

thisstepcanwait.Pre-executiondelay(ms)—Specifiestheamountoftimetowaitbeforethestepexecutes.Ifyouconfigurethesteptostartafteranotherstep,thedelayrepresentstheamountoftimetowaitafterthespecifiedstepstarts.Post-executiondelay(ms)—Specifiestheamountoftimetowaitafterthestepexecutes.Timingtype—Containsthefollowingoptionsthatspecifyhowtheoutputsignalofthestepistimed:

Untimed—Specifiesthattheoutputsignalisnottimed.Selectthisoptioniftheoutputsignalisnotascalarvalueoratime-continuouswaveform.Continuous—Specifiesthattheoutputsignalistimedcontinuously.Selectthisoptioniftheoutputsignalisatime-continuouswaveform.Periodic—Specifiesthattheoutputsignalistimedperiodically.SelectthisoptioniftheoutputsignalisascalarvalueandyouwanttoforcethesteptorunatarateyouspecifyinSampleperiod(s).Sampleperiod(s)—[Timingtype:Periodic]Specifiesthesampleperiodtouseforaperiodicoutputsignal.SetSampleperiod(s)to0torunthestepasfastaspossible.

RunLabVIEW8.5VIRunsaLabVIEW8.5VIintheLabVIEWSignalExpressenvironment.LabVIEWSignalExpressassumesallcontrolsontheconnectorpaneoftheVIyouspecifyareparameters.Ifthereareinputsavailable,usetheConnectInputbuttontospecifyacontrolLabVIEWSignalExpresscanusetopassdatatoyourVI.YoumustusetheversionoftheRunLabVIEWVIstepthatmatchestheversionofLabVIEWyousavedyourVIin.Forexample,ifyousavedaVIinLabVIEW7.1,youmustusetheRunLabVIEW7.1VIstep.IfyouuseaVIthatcontainsaparameterwithanX-Yarraydatatype,theoutputmustbeaclusterindicator,notagraphindicator.Thex-arraymustbethefirstcomponentintheclusterandthey-arraymustbethesecondcomponentinthecluster.Youmustrepresentbothcomponentsintheclusterasnumericdoubles.LabVIEWSignalExpresscanacceptavarietyofdatatypes.YoucanbuildaRunLabVIEWVIstepfromanexistingVIoryoucanstartfromatemplate.

Parameter DescriptionSettings Containsthefollowingoptions:

SelectVI—SpecifiesthepathtotheVIyouwanttouseasastepintheLabVIEWSignalExpressenvironment.Runthisstepautomatically—RunstheVIassoonasyoumakeachangetothefrontpanel.RefreshVI—ReloadstheVIfromdisk,scanstheVIforanychangesmadewhileusingLabVIEWSignalExpress,andupdatestheRunLabVIEWVIstepwithanychanges.IfyouarerunningaprojectinLabVIEWSignalExpress,youmustclicktheStopbuttonbeforeyouclicktheRefreshVIbuttonfortheselectedVItosuccessfullyupdate.Controlname—SpecifieswhichinputsoftheVItodesignateassignalinputsfromtheLabVIEWSignalExpressproject.IfyouwanttopassdatafromadifferentstepoftheprojectintotheVI,usean

inputsignal.LabVIEWSignalExpressassumesallcontrolsontheconnectorpaneoftheVIyouspecifyareparameters.Aninputsignalisavaluethatcomesfromapreviousstep.YoucannoteditthatinputsignalonthefrontpaneloftheVI.ConnectInput—SpecifiesacontrolLabVIEWSignalExpresscanusetopassdatatotheVI.DisconnectInput—RemovestheinputfromtheControlNamelistbox.Inputsignal—Listsareferencetoasignalfromapreviousstep.Outputs—ListstherecognizedoutputsoftheVIthatreturndatatotheproject.TheseoutputsmustbeonthefrontpaneloftheVI,matchoneoftheLabVIEWSignalExpresssignaltypes,andbeconnectedtotheVIconnectorpane.Stricttypeofoutputdata—SpecifiesthesignaltypeoftheoutputfromtheVI.Youmustspecifyastrictsignaltypetoguaranteethatotherstepsintheprojectcanacceptthesignalasaninputandproperlyoperateonit.

ConfigureVI

DisplaysthefrontpaneloftheVIyouselectedontheSettingstab.

ExecutionControl

Containsthefollowingoptions:Startthisstepafter—Makesthestepwaituntilanotherstephasstartedbeforeexecuting.Youcanmakethestepwaitonanyotherhardwarestepintheprojectbyselectingthesteptowaitonfromthepull-downmenu.

Youcanusethisoptiontoforceanacquisitiondevicetostartafteragenerationdevicestarts.Youalsocanusethisoptiontoensurethatadevicegeneratingatriggersignalstartsafterthedevicereceivingthesignal,whichavoidssendingthesignalbeforethereceiverisready.Steptowaitfor—Liststhepossiblestepsforwhich

thisstepcanwait.Pre-executiondelay(ms)—Specifiestheamountoftimetowaitbeforethestepexecutes.Ifyouconfigurethesteptostartafteranotherstep,thedelayrepresentstheamountoftimetowaitafterthespecifiedstepstarts.Post-executiondelay(ms)—Specifiestheamountoftimetowaitafterthestepexecutes.Timingtype—Containsthefollowingoptionsthatspecifyhowtheoutputsignalofthestepistimed:

Untimed—Specifiesthattheoutputsignalisnottimed.Selectthisoptioniftheoutputsignalisnotascalarvalueoratime-continuouswaveform.Continuous—Specifiesthattheoutputsignalistimedcontinuously.Selectthisoptioniftheoutputsignalisatime-continuouswaveform.Periodic—Specifiesthattheoutputsignalistimedperiodically.SelectthisoptioniftheoutputsignalisascalarvalueandyouwanttoforcethesteptorunatarateyouspecifyinSampleperiod(s).Sampleperiod(s)—[Timingtype:Periodic]Specifiesthesampleperiodtouseforaperiodicoutputsignal.SetSampleperiod(s)to0torunthestepasfastaspossible.

RunLabVIEW8.6VIRunsaLabVIEW8.6VIintheLabVIEWSignalExpressenvironment.LabVIEWSignalExpressassumesallcontrolsontheconnectorpaneoftheVIyouspecifyareparameters.Ifthereareinputsavailable,usetheConnectInputbuttontospecifyacontrolLabVIEWSignalExpresscanusetopassdatatoyourVI.YoumustusetheversionoftheRunLabVIEWVIstepthatmatchestheversionofLabVIEWyousavedyourVIin.Forexample,ifyousavedaVIinLabVIEW7.1,youmustusetheRunLabVIEW7.1VIstep.IfyouuseaVIthatcontainsaparameterwithanX-Yarraydatatype,theoutputmustbeaclusterindicator,notagraphindicator.Thex-arraymustbethefirstcomponentintheclusterandthey-arraymustbethesecondcomponentinthecluster.Youmustrepresentbothcomponentsintheclusterasnumericdoubles.LabVIEWSignalExpresscanacceptavarietyofdatatypes.YoucanbuildaRunLabVIEWVIstepfromanexistingVIoryoucanstartfromatemplate.

Parameter DescriptionSettings Containsthefollowingoptions:

SelectVI—SpecifiesthepathtotheVIyouwanttouseasastepintheLabVIEWSignalExpressenvironment.Runthisstepautomatically—RunstheVIassoonasyoumakeachangetothefrontpanel.RefreshVI—ReloadstheVIfromdisk,scanstheVIforanychangesmadewhileusingLabVIEWSignalExpress,andupdatestheRunLabVIEWVIstepwithanychanges.IfyouarerunningaprojectinLabVIEWSignalExpress,youmustclicktheStopbuttonbeforeyouclicktheRefreshVIbuttonfortheselectedVItosuccessfullyupdate.Controlname—SpecifieswhichinputsoftheVItodesignateassignalinputsfromtheLabVIEWSignalExpressproject.IfyouwanttopassdatafromadifferentstepoftheprojectintotheVI,usean

inputsignal.LabVIEWSignalExpressassumesallcontrolsontheconnectorpaneoftheVIyouspecifyareparameters.Aninputsignalisavaluethatcomesfromapreviousstep.YoucannoteditthatinputsignalonthefrontpaneloftheVI.ConnectInput—SpecifiesacontrolLabVIEWSignalExpresscanusetopassdatatotheVI.DisconnectInput—RemovestheinputfromtheControlNamelistbox.Inputsignal—Listsareferencetoasignalfromapreviousstep.Outputs—ListstherecognizedoutputsoftheVIthatreturndatatotheproject.TheseoutputsmustbeonthefrontpaneloftheVI,matchoneoftheLabVIEWSignalExpresssignaltypes,andbeconnectedtotheVIconnectorpane.Stricttypeofoutputdata—SpecifiesthesignaltypeoftheoutputfromtheVI.Youmustspecifyastrictsignaltypetoguaranteethatotherstepsintheprojectcanacceptthesignalasaninputandproperlyoperateonit.

ConfigureVI

DisplaysthefrontpaneloftheVIyouselectedontheSettingstab.

ExecutionControl

Containsthefollowingoptions:Startthisstepafter—Makesthestepwaituntilanotherstephasstartedbeforeexecuting.Youcanmakethestepwaitonanyotherhardwarestepintheprojectbyselectingthesteptowaitonfromthepull-downmenu.

Youcanusethisoptiontoforceanacquisitiondevicetostartafteragenerationdevicestarts.Youalsocanusethisoptiontoensurethatadevicegeneratingatriggersignalstartsafterthedevicereceivingthesignal,whichavoidssendingthesignalbeforethereceiverisready.Steptowaitfor—Liststhepossiblestepsforwhich

thisstepcanwait.Pre-executiondelay(ms)—Specifiestheamountoftimetowaitbeforethestepexecutes.Ifyouconfigurethesteptostartafteranotherstep,thedelayrepresentstheamountoftimetowaitafterthespecifiedstepstarts.Post-executiondelay(ms)—Specifiestheamountoftimetowaitafterthestepexecutes.Timingtype—Containsthefollowingoptionsthatspecifyhowtheoutputsignalofthestepistimed:

Untimed—Specifiesthattheoutputsignalisnottimed.Selectthisoptioniftheoutputsignalisnotascalarvalueoratime-continuouswaveform.Continuous—Specifiesthattheoutputsignalistimedcontinuously.Selectthisoptioniftheoutputsignalisatime-continuouswaveform.Periodic—Specifiesthattheoutputsignalistimedperiodically.SelectthisoptioniftheoutputsignalisascalarvalueandyouwanttoforcethesteptorunatarateyouspecifyinSampleperiod(s).Sampleperiod(s)—[Timingtype:Periodic]Specifiesthesampleperiodtouseforaperiodicoutputsignal.SetSampleperiod(s)to0torunthestepasfastaspossible.

LabVIEWSignalExpressEnvironmentTheprojectsyoucreateintheLabVIEWSignalExpressenvironmentincludethestepsyouselectfromtheAddStepmenu.Youdisplaytheresultsofthemeasurementsingraphsandtables.Youcaneditprojectswhiletheprojectruns,andtheresultsupdate.IfyouinstalledNationalInstrumentsLabVIEW,youcanconvertprojectsintoVIsorusetheRunLabVIEWVIsteptoimportVIsforuseinLabVIEWSignalExpressprojects.

NoteYoumustuseLabVIEW7.1orlatertocreateaRunLabVIEWVIstep.YoucannotrunaVIthatwassavedforanearlierversionofLabVIEWusingtheRunLabVIEWVIstep.YoumustsaveyourVIintheactualversionofLabVIEWyouwanttorun.

ChannelViewTheChannelViewisacentrallocationforviewingandconfiguringhardwareandsharedvariables.WhenyoulaunchLabVIEWSignalExpress,theapplicationautomaticallydetectsinstalledorsimulatedNI-DAQmxdevices,NI-DMMdevices,andNIswitchmodulesanddisplaysthedevicesintheChannelView.YoualsocanimportandexportChannelViewdatafromMicrosoftExcelspreadsheets.TheChannelViewdoesnotdisplayanalogoutput(AO)modules.Inthedefaultlayout,theChannelViewisasupplementaryviewthatappearsbelowtheprimaryviewasatablewithtwocolumns:PhysicalChannelandAcquire.LabVIEWSignalExpressdisplaysthedevicesitdetectsinthePhysicalChannelcolumn.

NoteIfLabVIEWSignalExpressdoesnotdetectanyinstalledorsimulatedNI-DAQmxdevices,NI-DMMdevices,orNIswitchmodules,theChannelViewdoesnotappearinthedefaultlayout.IfyoudisplaytheChannelViewwithnosupportedhardwarepresent,theChannelViewappearsempty.

UsetheViewpull-downmenuatthetopoftheChannelViewtospecifywhethertodisplayhardwareorsharedvariables.IfyouselectSharedVariablesfromtheViewpull-downmenu,theSharedVariableNameandtheSamplePeriod(s)columnsappear.TheAcquirecolumncontainscheckboxesthatspecifywhethertoacquiresignalsfromhardwareorreadthevaluesofsharedvariables.WhenyouplaceacheckmarkintheAcquirecheckboxforahardwareitem,LabVIEWSignalExpressaddsanAcquireSignalssteptotheProjectViewandadditionalcolumnsappearwithitem-specificconfigurationoptions.WhenyouplaceacheckmarkintheAcquirecheckboxforasharedvariable,LabVIEWSignalExpressaddsaReadSharedVariablessteptotheProjectViewor,ifaReadSharedVariablesStepalreadyexists,addsthevalueofthesharedvariableasanoutputoftheexistingstep.IftheChannelViewisnotvisible,selectView»ChannelViewtodisplaytheChannelView.

ConfiguringItemsfromthePropertiesWindowYoucanusethePropertieswindowtoconfigurechannels,devices,orsharedvariables.ThePropertieswindowdisplaystheconfigurationoptionsforthedevice(s),channel(s),orsharedvariable(s)youselectintheChannelView.Ifyouselectmultipleitems,thePropertieswindowdisplaysalltheconfigurationoptionstheitemssharesoyouquicklycanupdatevaluesforalltheitems.Forexample,iftheChannelViewshowsthatyouaremeasuringvoltageon10channelsandyouwanttomeasureresistanceonthose10channels,youcanselectall10channelsandusethePropertieswindowtoupdatethemeasurementtypeonceinsteadofoneachindividualchannel.IfthePropertieswindowisnotvisible,selectView»PropertiestodisplaythePropertieswindow.Forhardwaredevices,asyoumakechangesinthePropertieswindow,theChannelViewtabledisplaysnewcolumnswiththeappropriateconfigurableoptionsfortheselectedmeasurement.

LoggedDataWindowTheLoggedDatawindowappearsbelowtheProjectViewinLabVIEWSignalExpressanddisplaysalistofallloggeddataandsnapshotsfromthecurrentprojectsortedbythetimeatwhichyourecordedthelogortookthesnapshot.YoucanusetheLoggedDatawindowtoview,export,andmanageloggeddataandsnapshots.Whenyoucreateanewdatalogorsnapshot,thenameofthenewdatalogorsnapshotautomaticallyappearsintheLoggedDatawindow.Expandthenametodisplaythesignalsthatthedatalogorsnapshotcontains.

ManagingLoggedDataEachdataloghasatop-level,user-definedname.Thedefaultnameisthetimestamp,butyoucanright-clickthetimestampandselectRenamefromtheshortcutmenutorenamealog.

NoteYoualsocanusetheRecordingOptionstabtonamealogbeforeyourecordthelog.

ThenameoftheactivelogappearsinboldintheLoggedDatawindow.Right-clickthenameofadatalogandselectMakeActiveLogtomakethatlogtheactivelog.IfyouareviewingalogontheDataViewtab,thedisplayupdatestodisplaytheactivelog.WhenyouexpandadatalogintheLoggedDatawindow,youcanright-clickasignalwithinthedatalogandselectfromthefollowingshortcutmenuoptionstomanagetheloggedsignal:

Properties—Displaysasummaryofthepropertiesoftheloggedsignal.ShowAlarmsandEvents—Displaysalistofallthealarmsandeventsintheloggedsignal.OpenFolder—Navigatestothelocationoftheloggedsignalondisk.ConverttoASCII—ConvertstheloggedsignaltoanASCIIfile.ExporttoMicrosoftExcel—ExportstheloggeddatatoMicrosoftExcel.Thisoptionexportseverysampleinthelog.

NoteWhenyouexportdatatoMicrosoftExcel,LabVIEWSignalExpresscopiesdatasamplestoaclipboardforexport.UsetheMaximumClipboardDataExportSizeoptionontheDatapageoftheOptionsdialogboxtoincreasethenumberofdatasamplestheclipboardcancontain.OpeninDIAdem—OpenstheloggedsignalinDIAdem.MakeLogViewable—SpecifiesforLabVIEWSignalExpresstoprocessthelogsoyoucanviewthelogonareasonablescaleinadisplayontheDataViewtab.SelectthisoptionifyousetPreparelogdataforviewingtoNeverontheLoggingpageoftheOptionsdialogbox.

ManagingSnapshotsEachsnapshothasatop-level,user-definedname.Thedefaultnameisthetimestamp,butyoucanright-clickthetimestampandselectRenamefromtheshortcutmenutorenameasnapshot.

NoteYoualsocanusetheCreateSnapshotdialogboxtonameasnapshotbeforeyoucreatethesnapshot.

WhenyouexpandasnapshotintheLoggedDatawindow,youcanright-clickasignalwithinthesnapshotandselectfromthefollowingshortcutmenuoptionstomanagethesignal:

SendTo—Sendsthesignaltoananalysisstep.Probe—DisplaysaDataProbewindowwithdetailedinformationaboutthesignal.CopyValue—Copiesthesignalvalueastextthatyoucanpasteintoatextfile.SaveValue—Savesthesnapshotasatextfile.Delete—Deletesthesignalfromthesnapshot.Rename—Renamesthesignal.

OperatorInterfaceUsetheOperatorInterfaceviewtocreateanoperatorinterfacecontainingcontrolsthatyoucanusetomodifystepparameters.Whenyourunaprojectinoperatormode,theonlyvaluesyoucanchangearevaluesofstepparametersthatyoubindtocontrolsontheoperatorinterface.SelectView»OperatorInterfacetodisplaytheOperatorInterfaceview.TheToolboxwindowcontainsthecontrolsyoucanaddtotheoperatorinterface.DragacontrolfromtheToolboxwindowtotheOperatorInterfaceviewtoaddthecontroltotheoperatorinterface.Youcanclickthearrowicon( )thatappearsonanoperatorinterfacecontroltoconfigurebasicpropertiesofthecontrol,oryoucanusethePropertieswindowtoviewandconfigureallthepropertiesofanoperatorinterfacecontrol.

NoteYoucannoteditthecontrolsonanoperatorinterfacewhenaprojectisinoperatormode.

YoucannotaddindicatorstotheOperatorInterfaceview.UsedisplaysontheDataViewtabtoseehowchangingthevalueofanoperatorinterfacecontroleffectssignalsintheproject.

ConfiguringtheProjectViewYoucanusetheOptionsdialogboxtoconfigurehowthestepsintheProjectViewappear.SelectTools»OptionstodisplaytheOptionsdialogbox.OntheGeneralpage,navigatetotheProjectViewsection.TheShowinputandoutputsignalsforallstepsoptiondisplaysallsignalsforallstepsorallsignalsfortheselectedstep.TheShowlargeiconsintheprojectviewoptiondisplaysallstepswithlargeiconsortheselectedstepwithalargeicon.

CopyingandPastingStepsWhenyoucopyandinsertastep,LabVIEWSignalExpressupdatesthestepandsubsequentstepsthatinheritfromthecopiedsteptoprocessthecorrectsignals.Completethefollowingstepstocopyandinsertastep.

1. IntheProjectView,right-clickthestepyouwanttocopyandselectCopyfromtheshortcutmenu.

2. Right-clickastepintheProjectViewandselectPasteBeforeSelectedSteporPasteAfterSelectedStepfromtheshortcutmenutoinsertthecopiedstepbeforeorafterthestepyouselected.

SignalTypesinLabVIEWSignalExpressLabVIEWSignalExpresscategorizessignalsbasedontheirtype,suchastime-domainsignals,frequency-domainsignals,scalarvalues,orBooleanvalues.Time-domainsignalsappearonagraphwhereasignalvalue(suchasamplitude)correspondstoatime.Frequency-domainsignalsappearonagraphwherethelevelofasignalcorrespondstoafrequencyvalue.Scalarvaluesappearintablesassinglevaluesoracollectionofsinglevalues,suchastheresultofaDCmeasurementoratone-frequencymeasurement.BooleanvaluesappearasverticalorhorizontalLEDs.LabVIEWSignalExpresscanmanagethedifferentsignaltypesinthefollowingways:

Youcanprocessonlysignalsthatmakesenseforaspecificstep.Forexample,youonlycanperformapowerspectrumoperationonatime-domainsignal.Youcannotmixsignaltypesthatareincompatible.Forexample,youcannotaddtime-domainsignalvaluestotheresultingvaluesofapowerspectrum.Youcanaddaphasesignalrepresentedindegreestoaphasesignalrepresentedinradians.LabVIEWSignalExpressconvertsthedifferentsignaltypes.Youcannotdisplayincompatiblesignalsonthesamegraph.Forexample,youcannotdisplayatimesignalandtheresultofapowerspectrumonthesamegraph.

StepsCanProcessDifferentSignalTypesSomestepscanprocessmorethanonesignaltype.Forexample,theScalingandConversionstepcanscaleatime-domainsignal(applyinggainandoffsetvalues)orcanscaleafrequency-domainsignal.Theavailablescalingoperationsdependonthetypeandunitofthesignal.Iftheinputsignalisafrequency-domainmagnitudesignal,youcanapplyagaintothemagnitudesignal.Iftheinputsignalisafrequency-domainphasesignal,youcanapplyadelaycorrectionvalue.

LabVIEWSignalExpressDataTypesThefollowingtableliststhemostcommondatatypesLabVIEWSignalExpressuses.

Graphic DescriptionTimeWaveform,RealTimeWaveform,Real,1DArrayTime-XYWaveform,RealTimeDigitalWaveform,FrequencySpectrum,MagnitudeFrequencySpectrum,PhaseFrequencySpectrum,CoherenceFrequency-XYWaveform,PowerLinearFrequency-XYWaveform,Power(dB)Frequency-XYWaveform,MagnitudeFrequency-XYWaveform,Magnitude(dB)Frequency-XYWaveform,Phase(rad.)Frequency-XYWaveform,Phase(deg.)FrequencyWaveform,RatioHistogram,GenericHistogram,Generic(%)Scalar,U32Scalar,DoubleScalar,Double,Array1DBooleanString

PropertiesWindowThePropertieswindowdisplayseditableattributesofdevices,channels,oroperatorinterfacecontrols.YoucanusethePropertieswindowtoconfiguremultipledevicesorchannelsthatyouselectintheChannelViewortoconfigurecontrolsyouaddtotheOperatorInterfaceview.IfyouselectanitemineithertheChannelViewortheOperatorInterfaceview,thePropertieswindowdisplaysthenameandattributesoftheitemyouselect.Ifyouselectmultipleitems,thePropertieswindowdisplaystheattributesthatarecommontoalltheselecteditems.Youcannotchangethevaluesofattributesthatappeardisabled,orgrayedout.SelectView»PropertiestodisplaythePropertieswindow.

ConfiguringDeviceChannelsUsingthePropertiesWindowYoucanusethePropertieswindowtoconfiguredevicesanddevicechannelswhenyouacquiresignalsusingtheChannelView.UsethePropertieswindowtoquicklyconfiguremultiplechannelswhenyouperformmulti-channelsignalacquisitions.Completethefollowingstepstoconfiguremultipledevicechannelssimultaneously.

1. IftheChannelViewisnotvisible,selectView»ChannelViewtodisplaytheChannelView.

2. SelectView»PropertiesorclickthePropertiestabthatappearsinthebottomleftcorneroftheapplicationwindowtodisplaythePropertieswindow.

3. IntheChannelView,clicktheexpandsymbolforthedevicefromwhichyouwanttoacquiresignalstodisplaythechannelsofthedevice.

4. Selectthechannelsfromwhichyouwanttoacquiresignals.Holddownthe<Ctrl>keyasyouselectthechannelsyouwanttoconfiguretoselectmultiplechannels.Youalsocanselectachannel,holddownthe<Shift>key,andselectanotherchanneltoselectallthechannelsbetweenthetwoyouclick,inclusive.

TheattributesyoucanconfigurefortheselectedchannelsappearenabledinthePropertieswindow.Settingsthatyoucannotconfigureforallselectedchannelsappeargrayedout.Grayedoutattributesusuallyareattributesthatyouconfiguredatthedevicelevelandthatyoucannotchangeforindividualchannels.

5. InthePropertieswindow,settheenabledsettingstothevaluesyouwanttouse.LabVIEWSignalExpressupdatesalltheselectedchannelswiththevaluesyouspecify.

ToolboxWindowTheToolboxwindowcontainsalistofcontrolsyoucanaddtoanoperatorinterface.Controlsincludeknobs,slides,switches,rings,textcontrols,andlabels.Operatorinterfacecontrolsresemblethecontrolsthatappearonthefrontpanelofaninstrument.Anoperatorinterfaceallowsausertochangestepparameterswhenaprojectisinoperatormode.UsetheToolboxwindowwiththeOperatorInterfaceviewtocreateanoperatorinterface.SelectacontrolintheToolboxwindowanddragthecontroltotheOperatorInterfaceviewtoaddthecontroltotheoperatorinterface.SelectView»ToolboxtodisplaytheToolboxwindow.

DataViewTheDataViewtabdisplaysdatainLabVIEWSignalExpress.YoucandragasignaldirectlyfromastepintheProjectViewtotheDataViewtabtodisplaythevalueofthesignal.TheDataViewtabcandisplaysignalsinseveralformats,includinggraphs,charts,andvariousnumericrepresentations.WhenyoudragasignaltotheDataViewtab,thesignalappearsinaneworexistingdisplaydependingonwhetheradisplayshowingthattypeofdataalreadyexists.Bydefault,theDataViewtabappearswithagraphdisplay,butLabVIEWSignalExpressautomaticallyupdatesthetypeofthedisplaytofitthedatatypeofthesignalyouadd.AprojectcancontainmultipleDataViewtabs,andoneDataViewtabcancontainmultipledisplays.Right-clickadisplayandselectDataView»NewDataViewfromtheshortcutmenutocreateanewDataViewtab.ToremoveaDataViewtab,eitherclosethetaborright-clickadisplayonthetabandselectDataView»RemoveDataViewfromtheshortcutmenu.YoualsocanusetheDataViewmenutoadd,remove,ormodifytheappearanceoftheDataViewtab.IftheDataViewtabisnotvisible,selectView»DataViewtodisplaythetab.

ViewingDatainaPlaybackWorkAreaInaPlaybackworkarea,theDataViewtabappearswithaplaybacktoolbaryoucanusetonavigateloggeddata.DragalogfromtheLoggedDatawindowtoadisplayontheDataViewtabtoviewtheloggeddata.Youthencanusethebuttonsontheplaybacktoolbartoplaybackthelog,playbackthelogrepeatedly,orupdatethedisplaytoshowthenextorpreviousiterationofthelog.Youcanusethedownarrowtosetthespeedofplayback.Theplaybacktoolbaralsoincludesatimelineyoucanusetoscrolltoaspecificpointinalog.

EventViewerWhenyoudisplayloggedsignalsongraphdisplaysontheDataViewtab,youcanusetheEventViewertodisplayeventssuchaserrors,warnings,andalarmsthatoccurredduringthelog.Right-clickthegraphofaloggedsignalandselectVisibleItems»EventViewertodisplaytheEventViewer.Foreachevent,theEventViewerdisplaysthetypeoftheevent,thetimetheeventoccurred,andabriefdescriptionoftheevent.Double-clickaneventintheEventViewertozoominonthesignalwheretheeventoccurred.

GraphLegendRight-clickagraphintheDataViewandselectVisibleItems»Legendtoopenthegraphlegend.Thegraphlegendlistseverysignaldisplayedinthegraphandthecorrespondingplotcolor.Toremoveasignalfromthegraph,removethecheckmarkfromthecheckboxnexttothesignalname.Clicktheplotcolornexttoasignaltochangethecolorofthesignal.Theorderinwhichthegraphlegendlistssignalsistheplotorderofthegraph.YoucanusetheSignalOrderpageoftheDisplayPropertiesdialogboxtochangetheplotorderofagraph.

GraphPaletteThegraphpaletteappearsbelowandtotheleftofagraphonagraphorchartdisplayorontheProjectDocumentationtab.Usethegraphpalette,shownasfollows,tospecifyhowyouinteractwithagraph.

Withthegraphpalette,youcanmovecursors,zoom,andpanthedisplay.Thegraphpaletteappearswiththefollowingbuttons,inorderfromlefttoright:

Zoom—Zoomsinandoutofthedisplay.Usethepull-downmenuthatappearswhenyouclickthisbuttontoselectazoommethod.CursorMovementTool—Movescursorsonthedisplay.PanningTool—Picksuptheplotandmovesitaroundonthedisplay.

Clickabuttononthegraphpalettetoenablezooming,movingcursors,orpanning.

GraphTimestampTime-domaingraphsinLabVIEWSignalExpresshavethreetimestampoptionsfordisplayingsignals.LabVIEWSignalExpressdisplaysgraphsoftime-domainsignalswithtimestampsthatprovidetheclearestviewofthesignalorsignalsbydefault.Youcanchangethetimestampofagraphbyright-clickingthegraph,selectingTimeStampfromtheshortcutmenu,andselectingoneofthefollowingtimestampoptions:

Ignore—Alltheplotsonthegraphstartatzeroregardlessoftheactualtimestampoftheplottedsignals.Selectthisoptiontodisplaymultipleplotswithunrelatedtimestamps,suchasdisplayinganacquisitionresultandasimulationsignalloadedfromafile.Absolute—Alltheplotsonthegraphdisplaysignalsthatshowtheactualtimestampofeachwaveform.Thisisthedefaultsettingforgraphsofloggeddata.Usethisoptionifyouwanttodisplayawaveformacquiredusingatriggereddigitizerwherethetimestampreference(zero)islinkedtothetriggerpoint.Relative—Allplotsonthegraphdisplaysignalsrelativetothestarttimeofthereferencesignalyouselect.Thereferencesignalstartsatzero.Forexample,ifyouplottwowaveformstime-stampedat15and13andselectthefirstwaveformasthereference,thetwoplotsstartat0and–2.Thisisthedefaultsettingforgraphsofonlyonesignal.UsethisoptionifyouwanttodisplaymultiplechannelsthatamultiplexedMIOboardacquiresanddisplaythetimingrelationshipbetweenthedifferentchannelstocorrectfortheinterchanneldelays.

PreviewGraphThePreviewGraphprovidesamethodforpanningthroughandzoominginandoutondataintheDataView.ThePreviewGraphappearsintheDataViewbydefaultwhenyouviewloggeddata.Whenviewingliveornon-loggeddata,right-clickadisplayintheDataViewandselectVisibleItems»PreviewtodisplaythePreviewGraph.IftheDataViewcontainsmultipledisplays,youcandisplayaseparatePreviewGraphwitheachdisplay.TheblueareainthePreviewGraph,whichappearsbetweentwoyellowcursors,indicatesthesectionofthesignalcurrentlyvisibleinthedisplay.Bydefault,thePreviewGraphdisplaysallavailabledata.Youcandragthecursorstodisplayasubsetofthedata,orusetheZoomInandZoomOutbuttonstochangethesectionofdatacurrentlydisplayed.Youalsocandragthecursorsorclicktotheleftorrightofthecursorstomovethecursors.Ifyouclicktotheleftorrightofthecursor,thecursormovestothespotyouclicked.UsethescrollbarbeneaththePreviewGraphtoscrollthroughthedata.

EventLogTheEventLogtabrecordseventssuchaserrors,warnings,andalarmsthatoccurinLabVIEWSignalExpress.Foreachevent,theEventLogtabdisplaystheseverityoftheeventandthetimetheeventoccurred,aswellasthesourceandtitleoftheevent,ifknown.Double-clickaneventorright-clicktheeventandselectPropertiesfromtheshortcutmenutodisplayanEventPropertieswindowthatcontainsmoreinformationabouttheevent.Foreventscausedbysteps,suchaserrorsandwarnings,youcanright-clicktheeventandselectViewEventSourcefromtheshortcutmenutodisplaythestepthatcausedtheevent.TocleartheEventLogtab,copyevents,orviewonlyspecifictypesofevents,right-clickanywhereonthetabandselecttheappropriateoptionfromtheshortcutmenu.IftheEventLogtabisnotvisible,selectView»EventLogtodisplaytheEventLogtab.

StepSetupTheStepSetuptabdisplaysconfigurationoptionsforsteps.TheStepSetuptabcandisplayconfigurationoptionsforonlyonestepatatime,andthecontentsofthetabarespecifictothestepyouselect.UsetheStepSetuptabtoselecttheinputsignalsastepprocessesandtosetthestepparameters.Insomecases,thetabalsoincludesgraphsthatplotthesignalsthestepreceivesasinputsandreturnsasoutputs.ClickthePreviewbuttonthatappearsontheStepSetuptabforthesestepstoshoworhidethegraphs.WhenyouselectastepintheProjectVieworaddanewsteptoaproject,LabVIEWSignalExpressautomaticallyupdatestheStepSetuptabtodisplayconfigurationoptionsforthenewstep.IfyouwanttheStepSetuptabtoalwaysshowconfigurationoptionsforthecurrentlyselectedstep,clicktheLocktoStepbuttononthetab.IfyoulocktheStepSetuptabtoastep,LabVIEWSignalExpressopensanewStepSetuptabwhenyouaddorselectanewstep.

ProjectDocumentationUsetheProjectDocumentationtabtodocumentprojects.Forexample,youcancreateprojectdescriptions,displayacquireddata,insertimages,anddocumentmeasurementresults.YoucandragsignalsfromtheProjectViewtotheProjectDocumentationtabtodisplayagraphthatissimilartoagraphontheDataViewtab.Youalsocanprintorexportdocumentationthatyoucreateforaproject.SelectView»ProjectDocumentationtodisplaytheProjectDocumentationtab.UsethetoolbarbuttonsthatappearonthistabandtheoptionsintheDocumentationmenutoformattextandobjectsonthetab.YoucanundoorredooperationsonthetabusingtheEditmenuorkeyboardshortcuts.

RecordingOptionsUsetheRecordingOptionstabtoconfiguredataloggingoperationsinLabVIEWSignalExpress.Ifaprojectincludesstepswithvalidoutputsignals,youcanbeginloggingimmediatelybyclickingtheRecordbuttonandselectingasignalfromtheLoggingSignalsSelectiondialogbox.However,theRecordingOptionstabenablesyoutoconfiguremoreadvancedloggingoptions,suchasstartandstopconditions,alarms,andevents.TheRecordingOptionstabincludesthefollowingpages:

SignalSelection—Specifiesthesignal(s)tolog.LogSummary—Specifiesthename,author,anddescriptionofalogandthefolderinwhichtosavethelogfile.StartConditions—SpecifiesconditionsthatmustoccurforLabVIEWSignalExpresstostartloggingthesignal(s).StopConditions—SpecifiesconditionsthatmustoccurforLabVIEWSignalExpresstostoploggingthesignal(s).Alarms—SpecifiesconditionsunderwhichLabVIEWSignalExpressrecordsanalarminthelog.Events—SpecifiesoccurrencesthatLabVIEWSignalExpressrecordsaseventsinthelog.

TheRecordingOptionstabalsoincludesaRecordingstatusfieldthatdisplaysthefollowinginformationaboutlogsyouarecurrentlyrecordingandavailablediskspace:

Recording—IndicateswhetherLabVIEWSignalExpressiscurrentlyloggingasignal.DiskInformation—Indicateshowmuchdiskspaceisavailableonthemachine.Currentestimatedlogsize—Displaystheestimatedsizeofthecurrentloginmegabytes.Recordingtimeleft—Indicateshowlongyoucancontinuerecordingthecurrentlogbeforeyourunoutofmemoryondisk.Currentlogstartedon—Indicatesthestartdateandtimeofthecurrentlog.

SignalSelectionPageUsethispageoftheRecordingOptionstabtospecifywhichsignalstologwhenyouperformadataloggingoperation.Thispageincludesthefollowingcomponents:

Signalselection—Displayssignalsyoucanselectforlogging.Theprojectmustcontainatleastonestepwithavalidoutputsignalforasignaltoappearinthislist.Containsthefollowingcomponents:

ChannelName—Displaysthenamesofthesignalsthatyoucanrecord.

NoteLabVIEWSignalExpressdoesnotsupportloggingoffrequencydomainsignalsortimeddigitalsignals.

Record—Specifiestorecordthesignal.NoteYoucannotusethispagetoselectfrequency-domainsignals.Tologafrequency-domainsignal,right-clicktheoutputsignalintheProjectViewandselectRecordlastvaluefromtheshortcutmenu.

LogSummaryPageUsethispageoftheRecordingOptionstabtocreateasummarythatdescribesalogyoucreatewhenyouperformadataloggingoperation.Thispageincludesthefollowingcomponents:

Summary—Containsthefollowingcomponentsyoucanusetoidentifythelog:

Logtitle—Specifiesthetitleofthelog.Enter<DATE&TIME>tonamethelogautomaticallybasedonthecurrentdateandtime,orenter<TIME>toautomaticallynamethelogbasedonthecurrenttime.Author—Specifiesthenameoftheauthorofthelog.Logdescription—Specifiesadescriptionofthelog.Promptfortitle/descriptionwhenlogiscreated—Specifiestoprompttheuserforatitleanddescriptionofthelogatthebeginningofadataloggingoperation.

Logfolder—Containsthefollowingcomponent:Logdestinationfolder—SpecifiesthefolderinwhichLabVIEWSignalExpresssavesthelogfile.YoualsocanusetheDefaultstoragedirectoryfieldontheLoggingpageoftheOptionsdialogboxtospecifyadefaultlogdestinationfolderforallLabVIEWSignalExpressprojects.

StartConditionsPageUsethispageoftheRecordingOptionstabtospecifywhichconditionsmustbemetfordataloggingtostart.Thispageincludesthefollowingcomponents:

Startconditionlist—Liststhesource,type,andstatusofeachstartconditionyouconfigure.Usetheupanddownarrowstochangetheorderofthestartconditions.Containsthefollowingcomponents:

Source—Indicatesthesourceofthestartcondition.ThisfielddisplaystheConditiontypeyouspecifyor,ifyousetConditiontypetoSignaltrigger,thenameoftheSignalyouspecify.Conditions—IndicatesthebehavioroftheSourcethattriggersastartcondition.ThiscolumnappearsemptyforDate/Timestartconditions.Met?—Indicateswhetherthestartconditionismet.

Add—AddsastartconditiontotheStartconditionlist.Remove—RemovestheselectedstartconditionfromtheStartconditionlist.Conditionlogic—SpecifiesthelogicLabVIEWSignalExpressusestoprocessthestartconditions.YoumustaddmorethanonestartconditiontotheStartconditionlisttodisplaythispull-downmenu.Youcanselectfromthefollowingoptions:

AND—Specifiestostartloggingonlywhenallstartconditionsaremet.OR—Specifiestostartloggingwhenanystartconditionismet.Sequence—SpecifiestostartloggingwhenallstartconditionsaremetintheorderinwhichtheyappearintheStartconditionlist.Exceptforthefirststartcondition,LabVIEWSignalExpressignoresstartconditionsuntiltheprecedingstartcondition(s)ismet.UsetheupanddownarrowsnexttotheStartconditionlisttochangetheorderofstartconditions.

Conditiontype—Specifiesthetypeoftheselectedstart

condition.Youcanselectfromthefollowingconditiontypes:Signaltrigger—(Default)SpecifiestostartloggingwhenatriggeroccursontheSignalyouspecify.UsetheTriggertypefieldtoconfigureatrigger.Softwaretrigger—SpecifiestostartloggingwhenauserpressesthebuttonfortheSoftwaretriggeryouspecify.SoftwaretriggerbuttonsappearintheLabVIEWSignalExpresstoolbarwhenyouspecifysoftwaretriggers.Date/Time—Specifiestostartloggingatthedateandtimeyouspecify.

Signal—[Conditiontype:Signaltrigger]Specifiesthesignaltousetotriggerthestartcondition.Triggertype—[Conditiontype:Signaltrigger]SpecifiesthebehavioroftheSignalthattriggersLabVIEWSignalExpresstostartlogging.Youcanselectfromthefollowingoptions:

Risingslope—(Default)StartsloggingwhenthesignalcrossesthevalueyouspecifyintheTriggervaluefieldwithapositiveslope.Fallingslope—StartsloggingwhenthesignalcrossesthevalueyouspecifyintheTriggervaluefieldwithanegativeslope.Enteringwindow—StartsloggingwhenthesignalentersthewindowbetweenthevaluesyouspecifyintheHighervalueandLowervaluefields.Leavingwindow—StartsloggingwhenthesignalleavesthewindowbetweenthevaluesyouspecifyintheHighervalueandLowervaluefields.

Triggervalue—[Triggertype:Risingslope,Fallingslope]Specifiesthevaluethesignalmustcrosstostartlogging.Hysteresis—[Triggertype:Risingslope,Fallingslope]SpecifiestheamountaboveorbelowtheTriggervaluethroughwhichthesignalmustpassbeforeLabVIEWSignalExpressstartslogging.YoucanuseHysteresistopreventnoisefromcausingafalsestartcondition.ForaRisingslopecondition,thesignalmustpassbelowTriggervalue–HysteresisbeforeLabVIEWSignalExpressstartslogging.ForaFallingslopecondition,the

signalmustpassaboveTriggervalue+HysteresisbeforeLabVIEWSignalExpressstartslogging.Highervalue—[Triggertype:Enteringwindow,Leavingwindow]Specifiesthehighlimitoftherangeinwhichthesignalmustenterorleavethewindowtostartlogging.Lowervalue—[Triggertype:Enteringwindow,Leavingwindow]Specifiesthelowlimitoftherangeinwhichthesignalmustenterorleavethewindowtostartlogging.Count—[Conditiontype:Signaltrigger]SpecifiesthenumberoftimestheSignalmustmeetthestartconditionbeforeLabVIEWSignalExpressbeginslogging.Softwaretrigger—[Conditiontype:Softwaretrigger]Specifiesasoftwaretriggertouseforthestartcondition.Youcanspecifyuptothreeseparatesoftwaretriggers.Whenyouselectasoftwaretrigger,atoolbarbuttonwiththetriggernameappears.Clickthetoolbarbuttontotriggerthestartcondition.Schedulestarttime—[Conditiontype:Date/Time]SpecifieshowfrequentlyaDate/Timestartconditionoccurs.Youcanselectfromthefollowingoptions:

Once—(Default)Specifiesforthestartconditiontooccurataspecifictime.Hourly—Specifiesforthestartconditiontooccurhourlyorinanincrementofhours,minutes,andsecondsthatyouspecify.Daily—Specifiesforthestartconditiontooccurdailyoreverynumberofdaysyouspecify.Weekly—Specifiesforthestartconditiontooccurweeklyoreverynumberofweeksyouspecifyonthedayordaysyouspecify.Custom—Specifiesforthestartconditiontooccuronacustomschedulethatyouspecify.

NoteIfyousetSchedulestarttimetoHourly,Daily,orWeekly,youmustconfigurestopconditionsthatstoploggingthesignalbetweenthescheduledstarttimes.

Startdate—[Schedulestarttime:Once]Specifiesthedateandtimetostartloggingthespecifiedsignal.

hours—[Schedulestarttime:Hourly]Specifiesthenumberofhoursbetweeneachoccurrenceofthestartcondition.Ifyouspecifyminutesandseconds,LabVIEWSignalExpresswaitsthecombinedtotalofhours,minutes,andsecondsbetweeneachstartcondition.minutes—[Schedulestarttime:Hourly]Specifiesthenumberofminutesbetweeneachoccurrenceofthestartcondition.Ifyouspecifyhoursandseconds,LabVIEWSignalExpresswaitsthecombinedtotalofhours,minutes,andsecondsbetweeneachstartcondition.seconds—[Schedulestarttime:Hourly]Specifiesthenumberofsecondsbetweeneachoccurrenceofthestartcondition.Ifyouspecifyhoursandminutes,LabVIEWSignalExpresswaitsthecombinedtotalofhours,minutes,andsecondsbetweeneachstartcondition.Everyxdays—[Schedulestarttime:Daily]Specifiesthenumberofdaysbetweeneachoccurrenceofthestartcondition.Everyxweek(s)—[Schedulestarttime:Weekly]Specifiesthenumberofweeksbetweeneachoccurrenceofthestartcondition.PlaceacheckmarkinthecheckboxthatcorrespondstothedayordaysonwhichyouwantLabVIEWSignalExpresstostartlogging.CustomSchedule—[Schedulestarttime:Custom]Displaysalistofdatesandtimesatwhichtostartlogging.ClicktheAddbuttontoaddadateandtimetothelist.Add—[Schedulestarttime:Custom]DisplaystheSetTimeandDatedialogbox,whichyoucanusetoaddadateandtimetotheCustomSchedule.Remove—[Schedulestarttime:Custom]RemovestheselecteddateandtimefromtheCustomSchedule.Startlogging—[Schedulestarttime:Hourly,Daily,Weekly]SpecifieswhenLabVIEWSignalExpressstartsloggingforthefirsttime.Youcanselectfromthefollowingoptions:

Immediately—(Default)Specifiestostartloggingforthefirsttimewhenyouruntheproject.Ondate—Specifiestostartloggingforthefirsttimeatthetimeanddateyouspecify.

Startfrom—[Schedulestarttime:Hourly,Daily,Weekly]Specifiesatimefromwhichtostartlogging.SelectOndatefromtheStartloggingpull-downmenutoenablethiscontrol.Advancedtiming—Containsthefollowingcomponents:

Pre-startconditionduration(s)—Specifiesthenumberofsecondsofdatabeforethestartconditionismettoincludeinthedatalog.Startconditionholdoff(s)—SpecifiesatimeinsecondstowaitafterLabVIEWSignalExpressbeginsacquiringasignalorafterastopconditionoccursbeforeacknowledgingstartconditions.

Restartbehavior—ContainscomponentsforconfiguringwhetherandhowLabVIEWSignalExpressrestartsloggingafterasetofstartandstopconditionsoccur.Forthesecomponentstoappear,youmustconfigureatleastonestopcondition.ThesecomponentsdonotappearifyouconfigureaDate/Timestartconditionthatonlyoccursonce.Containsthefollowingcomponents:

Repeatstart/stopcycle—Containsthefollowingoptions:xtimes—(Default)Specifiesanumberoftimestorestartlogging.Until—SpecifiesadateafterwhichLabVIEWSignalExpressnolongerrestartslogging.

Restartstart/stopcyclein—Specifieswheretosaveloggeddataafterarestartoccurs.Youcanselectfromthefollowingoptions:

currentlog—(Default)Specifiestosaveloggeddatainthesamelogfileafterarestartoccurs.newlog—Specifiestosaveloggeddatainanewlogfileafterarestartoccurs.

StopConditionsPageUsethispageoftheRecordingOptionstabtospecifywhichconditionsmustbemetfordataloggingtostop.Thispageincludesthefollowingcomponents:

Stopconditionlist—Liststhesource,type,andstatusofeachstopconditionyouconfigure.Usetheupanddownarrowstochangetheorderofthestopconditions.

Source—Indicatesthesourceofthestopcondition.ThisfielddisplaystheConditiontypeyouspecifyor,ifyousetConditiontypetoSignaltrigger,thenameoftheSignalyouspecify.Conditions—IndicatesthebehavioroftheSourcethattriggersastopcondition.Met?—Indicateswhetherthestopconditionismet.

Add—AddsastopconditiontotheStopconditionlist.Remove—RemovestheselectedstopconditionfromtheStopconditionlist.Conditionlogic—SpecifiesthelogicLabVIEWSignalExpressusestoprocessthestopconditions.YoumustaddmorethanonestopconditiontotheStopconditionlisttodisplaythispull-downmenu.Youcanselectfromthefollowingoptions:

AND—Specifiestostoploggingonlywhenallstopconditionsaremet.OR—Specifiestostoploggingwhenanystopconditionismet.Sequence—SpecifiestostoploggingwhenallstopconditionsaremetintheorderinwhichtheyappearintheStopconditionlist.Exceptforthefirststopcondition,LabVIEWSignalExpressignoresstopconditionsuntiltheprecedingstopcondition(s)ismet.UsetheupanddownarrowsnexttotheStopconditionlisttochangetheorderofstopconditions.

Conditiontype—Specifiesthetypeoftheselectedstopcondition.Youcanselectfromthefollowingconditiontypes:

Duration—Specifiestostoploggingafteranamountof

timeyouspecify.Date/Time—Specifiestostoploggingatthedateandtimeyouspecify.Signaltrigger—SpecifiestostoploggingwhenatriggeroccursontheSignalyouspecify.UsetheTriggertypefieldtoconfigureatrigger.Softwaretrigger—SpecifiestostoploggingwhentheSoftwaretriggeryouspecifyoccurs.

Duration(s)—[Conditiontype:Duration]Specifiesthenumberofsecondstologdatabeforethestopconditionismet.Time—[Conditiontype:Date/Time]Specifiesthedateandtimetostoplogging.Signal—[Conditiontype:Signaltrigger]Specifiesthesignaltousetotriggerthestopcondition.Triggertype—[Conditiontype:Signaltrigger]SpecifiesthebehavioroftheSignalthattriggersLabVIEWSignalExpresstostoplogging.Youcanselectfromthefollowingoptions:

Risingslope—(Default)StopsloggingwhenthesignalcrossesthevalueyouspecifyintheTriggervaluefieldwithapositiveslope.Fallingslope—StopsloggingwhenthesignalcrossesthevalueyouspecifyintheTriggervaluefieldwithanegativeslope.Enteringwindow—StopsloggingwhenthesignalentersthewindowbetweenthevaluesyouspecifyintheHighervalueandLowervaluefields.Leavingwindow—StopsloggingwhenthesignalleavesthewindowbetweenthevaluesyouspecifyintheHighervalueandLowervaluefields.

Triggervalue—[Triggertype:Risingslope,Fallingslope]Specifiesthevaluethesignalmustcrosstostoplogging.Hysteresis—[Triggertype:Risingslope,Fallingslope]SpecifiestheamountaboveorbelowtheTriggervaluethroughwhichthesignalmustpassbeforeLabVIEWSignalExpressstopslogging.YoucanuseHysteresistopreventnoisefromcausingafalsestopcondition.ForaRisingslopecondition,thesignalmust

passbelowTriggervalueHysteresisbeforeLabVIEWSignalExpressstopslogging.ForaFallingslopecondition,thesignalmustpassaboveTriggervalue+HysteresisbeforeLabVIEWSignalExpressstopslogging.Highervalue—[Triggertype:Enteringwindow,Leavingwindow]Specifiesthehighlimitoftherangeinwhichthesignalmustenterorleavethewindowtostoplogging.Lowervalue—[Triggertype:Enteringwindow,Leavingwindow]Specifiesthelowlimitoftherangeinwhichthesignalmustenterorleavethewindowtostoplogging.Count—[Conditiontype:Signaltrigger]SpecifiesthenumberoftimestheSignalmustmeetthestopconditionbeforeLabVIEWSignalExpressstopslogging.Softwaretrigger—[Conditiontype:Softwaretrigger]Specifiesasoftwaretriggertouseforthestopcondition.Youcanspecifyuptothreeseparatesoftwaretriggers.Whenyouselectasoftwaretrigger,atoolbarbuttonwiththetriggernameappears.Clickthetoolbarbuttontotriggerthestopcondition.Advancedtiming—Containsthefollowingcomponents:

Post-stopconditionduration(s)—Specifiesthenumberofsecondsofdataafterthestopconditionismettoincludeinthedatalog.Stopconditionholdoff(s)—Specifiesatimeinsecondstowaitafterastartconditionoccursbeforeacknowledgingstopconditions.

AlarmsPageUsethispageoftheRecordingOptionstabtospecifyalarmconditionsforadataloggingoperation.Ifyouspecifymultiplealarmconditions,analarmactivateseachtimethesignalmeetsanyofthealarmconditions.Thispageincludesthefollowingcomponents:

Alarmlist—Liststhesource,type,andstatusofeachalarmconditionyouconfigure.Add—AddsanalarmconditiontotheAlarmlist.Remove—RemovestheselectedalarmconditionfromtheAlarmlist.Signal—Specifiesthesignaltomonitorforalarmconditions.Condition—SpecifiesthealarmconditiontypethatSignalmustmeetforanalarmtooccur.

Above—SpecifiesthatanalarmoccursifSignalisabovetheValueyouspecify.Below—SpecifiesthatanalarmoccursifSignalisbelowtheValueyouspecify.InsideRange—SpecifiesthatanalarmoccursifSignalisbetweentheHighervalueandLowervalueyouspecify.OutsideRange—SpecifiesthatanalarmoccursifSignalisabovetheHighervalueorbelowtheLowervalueyouspecify.

Value—[Condition:Above,Below]SpecifiesthevalueSignalmustmeetforanalarmtooccur.Highervalue—[Condition:InsideRange,OutsideRange]SpecifiesthehighlimitoftherangeofvaluesSignalmustmeetforanalarmtooccur.Lowervalue—[Condition:InsideRange,OutsideRange]SpecifiesthelowerlimitoftherangeofvaluesSignalmustmeetforanalarmtooccur.Deadband—Specifiesthedeadbandvalueforthealarmcondition.TheDeadbandbehaviordependsontheConditionyouselect.

Condition DeadbandbehaviorAbove ThealarmstaysactiveuntilSignalfallsbelowValue

–Deadband.Below ThealarmstaysactiveuntilSignalrisesabove

Value+Deadband.InsideRange

ThealarmstaysactiveuntilSignalfallsbelowHighervalue–DeadbandorrisesaboveLowervalue+Deadband.

OutsideRange

ThealarmstaysactiveuntilSignalrisesaboveHigherValue+DeadbandorfallsbelowLowervalue–Deadband.

Rearmtime—Specifiesanamountoftimethatmustpassbetweensubsequentalarms.Action—Specifiestheactiontotakewhenanalarmoccurs.

None—Specifiestotakenoadditionalactionwhenanalarmoccurs.Beep—Specifiestoemitasystembeepbasedonthealarmstate.DisplayMessage—Specifiestodisplayauser-definedmessagebasedonthealarmstate.SetDigitalLine—SpecifiestosetthestateofadigitallineonaDAQmxdevicebasedonthealarmstate.SetAnalogLevel—SpecifiestochangethelevelofaDAQmxdeviceanalogoutputchannelbasedonthealarmstate.GenerateSoftwareTrigger—Specifiestogenerateasoftwaretriggerbasedonthealarmstate.Youcanusethesoftwaretriggertotriggeradevicetogenerateasignal.CreateSnapshot—Specifiestocreateasnapshotbasedonthealarmstate.RunProgram—Specifiestoexecutecommandsbasedonthealarmstate.Forexample,youcanusethisfieldtoopenaversionofLabVIEWandrunaVI.

BeepwhenalarmturnsON—[Action:Beep]Specifiestoemita

systembeepwhenthealarmturnson.BeepwhenalarmturnsOFF—[Action:Beep]Specifiestoemitasystembeepwhenthealarmturnsoff.Beeptype—[Action:Beep]Specifiesthetypeofbeeptoemit.TheoperatingsystemdefinesthesoundassociatedwitheachBeeptype.Youcanselectfromthefollowingoptions:

DefaultBeep—EmitstheOSdefaultbeep.AsteriskBeep—EmitstheOSasteriskbeep.ExclamationBeep—EmitstheOSexclamationbeep.HandBeep—EmitstheOShandbeep.QuestionBeep—EmitstheOSquestionbeep.OKBeep—EmitstheOSOKbeep.

Message-AlarmON—[Action:DisplayMessage]Specifiesamessagetodisplaywhenthealarmturnson.Message-AlarmOFF—[Action:DisplayMessage]Specifiesamessagetodisplaywhenthealarmturnsoff.DAQmxdigitalline—[Action:SetDigitalLine]SpecifiestheDAQmxlinetotoggle.Action—[Action:SetDigitalLine]SpecifieshowtosettheDAQmxlineinresponsetothealarm.Youcanselectfromthefollowingoptions:

Toggleline—SetstheDAQmxlinetothesamestateasthealarmwhilethealarmisactive.Forexample,aninactivelinebecomesactivewhenthealarmassertsandreturnstotheinactivestatewhenthealarmdeasserts.Toggleline(inverse)—SetstheDAQmxlinetotheoppositestateofthealarmwhilethealarmisactive.Forexample,anactivelinebecomesinactivewhenthealarmassertsandreturnstotheactivestatewhenthealarmdeasserts.HIGHwhenAlarmturnsON—SetstheDAQmxlinetoHIGHlogicwhenthealarmasserts.Forexample,aninactivelinebecomesactivewhenthealarmassertsandremainsinthatstatewhenthealarmdeasserts.LOWwhenAlarmturnsON—SetstheDAQmxlinetoLOWlogicwhenthealarmasserts.Forexample,an

activelinebecomesinactivewhenthealarmassertsandremainsinthatstatewhenthealarmdeasserts.

Alarm/Linepreview—DisplaysapreviewofhowtheActionyouspecifyeffectstheDAQmxdigitalline.DAQmxanalogoutputchannel—[Action:SetAnalogLevel]Specifiestheanalogoutputchannelofwhichtochangethelevelbasedonthealarmstate.Initiallevel—[Action:SetAnalogLevel]Specifiestheinitialanalogchannellevel.LabVIEWSignalExpresssetstheinitialchannellevelwhentheprojectbeginsrunning.AlarmON-level—[Action:SetAnalogLevel]Specifiestheanaloglevelwhenthealarmison.AlarmOFF-level—[Action:SetAnalogLevel]Specifiestheanaloglevelwhenthealarmisoff.GeneratetriggerwhenalarmturnsON—[Action:GenerateSoftwareTrigger]Specifiestogenerateasoftwaretriggerwhenthealarmturnson.Trigger(ON)—[Action:GenerateSoftwareTrigger]Specifiesthesoftwaretriggertogeneratewhenthealarmturnson.GeneratetriggerwhenalarmturnsOFF—[Action:GenerateSoftwareTrigger]Specifiestogenerateasoftwaretriggerwhenthealarmturnsoff.Trigger(OFF)—[Action:GenerateSoftwareTrigger]Specifiesthesoftwaretriggertogeneratewhenthealarmturnsoff.CreatesnapshotwhenalarmturnsON—[Action:CreateSnapshot]Specifiestocreateasnapshotwhenthealarmturnson.Snapshot(ON)—[Action:CreateSnapshot]Specifiesthesignalstoincludeinthesnapshot.Youcanselectfromthefollowingoptions:

Alarmedsignal—(Default)Createsasnapshotofthesignalthatcausesthealarm.Allsignalsinproject—Createsasnapshotofallthesignalsintheproject.

CreatesnapshotwhenalarmturnsOFF—[Action:CreateSnapshot]Specifiestocreateasnapshotwhenthealarmturns

off.Snapshot(OFF)—[Action:CreateSnapshot]Specifiesthesignalstoincludeinthesnapshot.Youcanselectfromthefollowingoptions:

Alarmedsignal—(Default)Createsasnapshotofthesignalthatcausesthealarm.Allsignalsinproject—Createsasnapshotofallthesignalsintheproject.

AlarmONCommand—[Action:RunProgram]Specifiesacommandtoexecutewhenthealarmturnson.ThisfieldissimilartotheCommandPromptinWindows.Youcanentersystemcommandsandpathstoexecutableprograms.AlarmONCommandrecognizesthefollowingtagsthatyoucanpassasargumentstoanexecutableprogram:

<ALARM_SIGNAL>—Specifiesthenameofthesignalthatgeneratesthealarm.<ALARM_DESCRIPTION>—Specifiesthedescriptionofthealarm.<ALARM_TIMESTAMP>—Specifiesthetimestampatwhichthealarmoccurs.

AlarmOFFCommand—[Action:RunProgram]Specifiesacommandtoexecutewhenthealarmturnsoff.ThisfieldissimilartotheCommandPromptinWindows.Youcanentersystemcommandsandpathstoexecutableprograms.AlarmOFFCommandrecognizesthefollowingtagsthatyoucanpassasargumentstoanexecutableprogram:

<ALARM_SIGNAL>—Specifiesthenameofthesignalthatgeneratesthealarm.<ALARM_DESCRIPTION>—Specifiesthedescriptionofthealarm.<ALARM_TIMESTAMP>—Specifiesthetimestampatwhichthealarmoccurs.

EventsPageUsethispageoftheRecordingOptionstabtoconfigureactionsthatLabVIEWSignalExpressrecognizesaseventsduringadataloggingoperation.YoucanconfigureLabVIEWSignalExpresstorecognizekeystrokeorsignal-basedevents.Thispageincludesthefollowingcomponents:

Eventlist—Liststhesourceandtypeofeventsyouconfigure.Add—AddsaneweventtotheEventlist.Remove—RemovestheselectedeventfromtheEventlist.Conditiontype—Specifiesthetypeoftheselectedevent.YoumustaddaneventtotheEventslisttodisplaythispull-downmenu.Youcanselectfromthefollowingoptions:

Signaltrigger—TriggersaneventwhenatriggeroccursontheSignalyouspecify.UsetheTriggertypefieldtoconfigureatrigger.Keystroke—Triggersaneventwhentheuserpressesthekeyorcombinationofkeysyouspecify.

Signal—[Conditiontype:Signaltrigger]Specifiesthesignaltousetotriggertheevent.Triggertype—[Conditiontype:Signaltrigger]SpecifiesthebehavioroftheSignalthattriggersanevent.Youcanselectfromthefollowingoptions:

Risingslope—TriggersaneventwhenthesignalcrossesthevalueyouspecifyintheTriggervaluefieldwithapositiveslope.Fallingslope—TriggersaneventwhenthesignalcrossesthevalueyouspecifyintheTriggervaluefieldwithanegativeslope.Enteringwindow—TriggersaneventwhenthesignalentersthewindowbetweenthevaluesyouspecifyintheHighervalueandLowervaluefields.Leavingwindow—TriggersaneventwhenthesignalleavesthewindowbetweenthevaluesyouspecifyintheHighervalueandLowervaluefields.

Triggervalue—[Triggertype:Risingslope,Fallingslope]

Specifiesthevaluethesignalmustcrosstotriggeranevent.Hysteresis—[Triggertype:Risingslope,Fallingslope]SpecifiestheamountaboveorbelowtheTriggervaluethroughwhichthesignalmustpassbeforeLabVIEWSignalExpressdetectstheevent.YoucanuseHysteresistopreventnoisefromcausingafalseeventtrigger.ForaRisingslopecondition,thesignalmustpassbelowTriggervalue–HysteresisbeforeLabVIEWSignalExpressdetectstheevent.ForaFallingslopecondition,thesignalmustpassaboveTriggervalue+HysteresisbeforeLabVIEWSignalExpressdetectstheevent.Highervalue—[Triggertype:Enteringwindow,Leavingwindow]Specifiesthehighlimitoftherangeinwhichthesignalmustenterorleavethewindowtotriggeranevent.Lowervalue—[Triggertype:Enteringwindow,Leavingwindow]Specifiesthelowlimitoftherangeinwhichthesignalmustenterorleavethewindowtotriggeranevent.Key—[Conditiontype:Keystroke]Specifiesthekeytheusermustpresstotriggertheevent.Modifierkeys—[Conditiontype:Keystroke]SpecifiesakeyorkeysthattheusermustpressinconjunctionwithKeytotriggertheevent.Youcanselectanyorallofthefollowingoptions:

Alt—Specifiesthe<Alt>keyasamodifier.Ctrl—Specifiesthe<Ctrl>keyasamodifier.Shift—Specifiesthe<Shift>keyasamodifier.Windows—Specifiesthe<Windows>keyasamodifier.

Annotation—Specifiesanannotationtoassociatewiththeevent.TheannotationappearsonthegraphofthesignalontheDataViewtab.Promptforannotationtext—[Conditiontype:Keystroke]Specifiestoprompttheusertoenteranannotationatthetimeaneventoccurs.

PlaybackOptionsNavigatetoaPlaybackworkareaandselectView»PlaybackOptionstodisplaythePlaybackOptionstab.UsethePlaybackOptionstabtoconfigureplaybackoptionsforloggeddata.Afteryouconfigureplaybackoptions,dragtheloggeddatatotheDataViewtabandclicktheRunbuttontoplaybacktheportionofloggeddatayouspecifyonthePlaybackOptionstab.

NoteWhenrunningloggeddatathroughanalysissteps,LabVIEWSignalExpressonlyprocessestheportionoftheloggeddatayouspecifyonthePlaybackOptionstab.Ifyoudonotconfigureplaybackoptions,LabVIEWSignalExpressprocessestheentirelogbydefault.Loggedsignal—Displaysalltheloggedsignalsintheproject.SelectasignalfromtheLoggedsignallisttoconfigureplaybackoptionsforthatsignal.Start/Stopplaybacktime—Displaysagraphofthedatatoplayback.Youcanmovethestartandstopcursorstolimitthedatayouwanttoplayback.

Zoom—Zoomsinonasectionofthegraphofdatatoplayback.Holdthemousebuttondownanddragthecursoracrossthegraphtoselectthesectionofdataonwhichtozoomin.

NoteZoominginonasectionofdatadoesnotchangethestartandstoptimeforplayback.UsetheCursorMovementToolortheStarttime(s)andStoptime(s)fieldstochangethestartandstoptime.

CursorMovementTool—Enablesyoutograbandmovethestartandendcursorsonthegraphtochangethestartandendtimeforplayingbackdata.Youalsocanright-clickthegraphandselectStartfromhereorEndherefromtheshortcutmenutomovethestartandendcursors.PanningTool—Enablesyoutograbtheplotandmoveitaroundinthegraphdisplay.

AutoscaleXAxis—Autoscalesthegraphalongthex-axis.IfyouzoominonasectionofdataorusethePanningTooltomovetheplotinthedisplay,youcanusethisbuttontoreturnthegraphtoitsoriginalappearance.Youalsocanright-clickthegraphandselectAutoscaleXaxisfromtheshortcutmenutoautoscalethegraphalongthex-axis.

NoteYoualsocanright-clickthegraphandselectAutoscaleYaxisfromtheshortcutmenutoautoscalethegraphalongthey-axis.

Starttime(s)—WhenyouselectRelativetologstarttimeintheTimeformatpull-downmenu,specifiesthetimeinsecondsafterthestartoftheloggedsignaltobeginplayingbacktheloggeddata.

WhenyouselectAbsoluteintheTimeformatpull-downmenu,specifiesanactualtimestampfromthelogfromwhichtobeginplayingbacktheloggeddata.Stoptime(s)—WhenyouselectRelativetologstarttimeintheTimeformatpull-downmenu,specifiesthetimeinsecondsafterthestartoftheloggedsignaltostopplayingbacktheloggeddata.

WhenyouselectAbsoluteintheTimeformatpull-downmenu,specifiesanactualtimestampfromthelogatwhichtostopplayingbacktheloggeddata.Timeformat—Specifiesthetimeformattousewhenconfiguringstartandstoptimesfortheplaybackoftheloggeddata.Youcanselectfromthefollowingoptions:

Relativetologstarttime—ConfigurestheStarttimeandStoptimefieldstospecifythestartandstoptimeofplaybackinsecondsrelativetothestarttimeoftheloggedsignal.Absolute—ConfigurestheStarttimeandStoptimefieldstospecifyactualtimestampsfromthelogforthestartandstoptimeofplayback.

Playbackblockconfiguration—Containsoptionstoconfigure

theblocksofdatainaloggedsignal.Ablockisasectionofasignalthatcontainsaspecifiednumberofsamples.Playbackblockconfigurationcontainsthefollowingoptions:

Blocksize(samples)—Specifiesthesizeinnumberofsamplesofeachblockofdataduringtheplaybackoperation.Overlap(%)—Specifiesthepercentageofoverlapbetweenblockswhenplayingbackdata.Ignorelastiterationifpartial—Specifiestoignorethelastiterationifitcontainsapartialblock.Numberofiterations—IndicatesthenumberofiterationsLabVIEWSignalExpressplaysback.Samplerate—Indicatesthesamplerateoftheloggedsignal.Playbackpreview—DisplaysapreviewoftheplaybackdatabasedontheBlocksize(samples)andOverlap(%).

MenusandToolbarsUsemenuitemsandtoolbarbuttonstoconfigureandrunLabVIEWSignalExpressprojects,modifytheenvironment,andaccesshelp.

MenusThemenusatthetopoftheLabVIEWSignalExpressapplicationwindowcontainitemscommontootherapplications,suchasOpenProject,SaveProject,Copy,andPaste,andotheritemsspecifictoLabVIEWSignalExpress.Somemenuitemsalsolistkeyboardshortcuts.Mosttoolbarbuttonshavecorrespondingmenuitemsthatperformthesameaction.ShortcutMenusSomeLabVIEWSignalExpressobjects,includingsteps,graphs,andlogs,haveassociatedshortcutmenus.Shortcutmenuscontainmoreobject-specificoptionsthantheLabVIEWSignalExpressmenus.Forexample,youcanusetheshortcutmenufortheDataViewtochangethevisibleitemsontheDataViewtab.Toaccesstheshortcutmenuforanobject,right-clicktheobject.

ToolbarsThetoolbaratthetopoftheLabVIEWSignalExpressapplicationwindowincludesbuttonsthatperformactionsontheproject-level,suchasrunningtheprojectordisplayingtheAddSteppalette.Sometabsalsohavetoolbarsthatperformactionsonthetab-level,suchasaddingadisplaytotheDataViewtabandchangingthefontontheProjectDocumentationtab.

FileMenuTheFilemenucontainsthefollowingitemsyoucanuseforbasicfileoperations,suchasopening,closing,andsavingfiles:

NewProjectcreatesanewproject.OpenProjectdisplaysastandardfiledialogboxyoucanusetonavigatetoandopenaproject.CloseProjectclosesthecurrentproject.Aconfirmationdialogboxpromptsyoutosaveanychangesyouhavemadetotheproject.RevertProjectrevertsthecurrentprojectbacktoitslastsavedstate.Youcannotundoaprojectreversion.SaveProjectsavesthecurrentproject.Ifyouaresavinganewprojectforthefirsttime,adialogboxpromptsyoutonametheprojectanddetermineitslocation.SaveProjectAssavesthecurrentprojectwithadifferentname,withadifferentfiletype,ortoadifferentlocation.Importincludesthefollowingoptions:

SnapshotsFromAnotherProjectimportssnapshotssavedinLabVIEWSignalExpressproject(.seproj)files.LoggedSignalsFromAnotherProjectimportsloggedsignalssavedinLabVIEWSignalExpress(.seproj)files.LoggedSignalsfromSignalExpressTDMSFilesimportsloggedsignalssavedin.tdmsfiles.ChannelViewfromExcelimportsdatatotheChannelViewfromaMicrosoftExcelspreadsheet.

Exportincludesthefollowingoptions:ExportProjectSettingstoXMLexportsthecurrentprojectconfigurationsettingstoanXMLfile.CopyDataViewImagecopiesthecontentsoftheactiveDataViewtabtotheclipboard.Youthencanpastetheimageintootherapplications.ThisoptionappearsonlywhentheactivetabistheDataViewtab.ChannelViewtoExcelexportsdatafromtheChannelViewtoaMicrosoftExcelspreadsheet.ExportDocumentationtoHTMLexportsdocumentation

fromtheProjectDocumentationtabofthecurrentprojecttoanHTMLfile.ThisoptionappearsonlywhentheactivetabistheProjectDocumentationtab.

PageSetupdisplaysaPageSetupdialogboxyoucanusetosetprintoptionsfortheapplication.PrintappearsonlywhentheactivetabistheDataViewtabortheProjectDocumentationtab.Printincludesthefollowingoptions:

PrintDataViewprintsthecontentoftheDataViewtab.ThisoptionappearsonlywhentheactivetabistheDataViewtab.PrintDocumentationprintsthecontentoftheProjectDocumentationtab.ThisoptionappearsonlywhentheactivetabistheProjectDocumentationtab.

RecentProjectsdisplaysthemostrecentlyopenedprojects.Exitquitstheapplication.Adialogboxpromptsyoutosaveanychangesyoumadetoanyopenfilesbeforetheapplicationterminates.

EditMenuTheEditmenucontainsthefollowingitemsthatyoucanusetomodifyprojectsandprojectcomponents:

Cutcontainsthefollowingoptions:CutSelectedStepremovesthestepyouselectandsavesittotheclipboard.CutTextremovesthetextyouselectandsavesittotheclipboard.ThisoptionappearsonlywhenyoudisplaytheProjectDocumentationtab.

Copycontainsthefollowingoptions:CopySelectedStepcopiesthestepyouselectandsavesittotheclipboard.CopyTextcopiesthetextyouselectandsavesittotheclipboard.ThisoptionappearsonlywhenyoudisplaytheProjectDocumentationtab.

Pastecontainsthefollowingoptions:PasteBeforeSelectedStepaddsthestepontheclipboardtotheProjectViewbeforetheselectedstep.PasteAfterSelectedStepaddsthestepontheclipboardtotheProjectViewaftertheselectedstep.PasteTextplacesthetextontheclipboardontheProjectDocumentationtab.ThisoptionappearsonlywhenyoudisplaytheProjectDocumentationtab.

DeleteSelectedStepdeletestheselectedstep.Undocancelsthelastactionyouperformed.RedocancelsthelastUndoactionyouperformed.

ViewMenuTheViewmenucontainsthefollowingitemsyoucanusetoconfiguretheappearanceoftheLabVIEWSignalExpressenvironment:

ResetLayoutresetstheLabVIEWSignalExpressenvironmenttothedefaultlayout.WorkAreascontainsthefollowingoptions:

Monitor/RecorddisplaystheMonitor/Recordworkarea.PlaybackdisplaysthePlaybackworkarea.ManageWorkAreasdisplaystheManageWorkAreasdialogbox,whichyoucanusetocreatenewworkareasoreditordeletecurrentworkareas.

ChannelViewdisplaystheChannelViewtab.EventLogdisplaystheEventLogtab.OperatorInterfacedisplaystheOperatorInterfacetab.PropertiesdisplaysthePropertieswindow.ToolboxdisplaystheToolboxwindow.DataViewdisplaystheDataViewtab.RecordingOptionsdisplaystheRecordingOptionstab.ProjectDocumentationdisplaystheProjectDocumentationtab.StepSetupdisplaystheStepSetuptab,whichcontainstheConfigurationView.ShowProjectViewdisplaystheProjectView,whichappearsontheleftsideoftheapplicationwindow.

NoteAdditionaloptionsmightappearinthismenuafteryouinstallcertainapplications,suchasNI-DAQmx.

ToolsMenuTheToolsmenucontainsitemsthatyoucanusetoconfigureprojectsorinstruments.Thetoolsthatappearinthismenudependontheassistantsyouhaveinstalled.

GenerateCodeconvertsthecurrentprojecttoaLabVIEWblockdiagram.AnalyzeProjectrunstheProjectAnalyzer,whichreturnsanyerrors,warnings,incompatibilities,orotherissuesinthecurrentproject.CreateNI-DAQmxGlobalChannellaunchestheDAQAssistanttohelpyoucreateanNI-DAQmxglobalchannel.Measurement&AutomationExplorerlaunchestheMeasurement&AutomationExplorer.UsetheMeasurement&AutomationExplorertoconfigurehardware.RefreshAvailableNIDevicesrefreshesthelistofdevicesyoucanuseinhardwaresteps.LabVIEWSignalExpresscanrefreshonlydevicesthatdonotrequireyoutorestartthecomputerinordertobedetected.OptionsdisplaystheOptionsdialogbox.

DocumentationMenuTheDocumentationmenucontainsitemsthatyoucanusetoedittextandobjectsontheProjectDocumentationtab.TheDocumentationmenuappearsonlywhentheactivetabistheProjectDocumentationtab.

SelectFontdisplaystheFontdialogbox,whichyoucanusetoconfigurethefont,style,size,color,andeffectsfortextintheProjectDocumentationtab.AlignParagraphspecifiesthehorizontalalignmentoftextandobjectsontheProjectDocumentationtab.

Left—AlignstextandobjectswiththeleftmarginoftheProjectDocumentationtab.Centered—AlignstextandobjectsinthecenteroftheProjectDocumentationtab.Right—AlignstextandobjectswiththerightmarginoftheProjectDocumentationtab.

ClearProjectDocumentationclearstheProjectDocumentationtab.InsertImageaddsanimagefile(GIF,JPG,BMP,PNG,orEMF)totheProjectDocumentationtab.SetObjectSizespecifiesthesizeoftheselectedobject.ViewAscontainsthefollowingoptions:

PageViewdisplaysthecontentontheProjectDocumentationtabasthecontentappearsonaprintedpage.WebViewdisplaysthecontentontheProjectDocumentationtabasthecontentappearsonaWebpage.

AddStepMenuTheAddStepmenuincludesthestepsyoucanusetocreateprojects.Thestepsarearrangedinmenus,suchastheGenerateSignalsandCreateSignalsmenus.SelectastepfromtheAddStepmenutoaddittotheproject.Thestepsthatappearinthemenudependontheassistantsyouhaveinstalled.Refertothestepdescriptionsinthishelpfileformoreinformationaboutthestepsthatappearinthismenu.TheAddStepmenualsoappearswhenyouright-clicktheProjectView.YoucandisplaytheAddStepmenuasafloatingwindowbyclickingtheAddStepbutton.

OperateMenuTheOperatemenucontainsthefollowingitemsthatyoucanusetoconfiguretheexecutionofaproject:

Runrunstheprojectusingthecurrentrunmodeconfiguration.Stopstopstheprojectwhenthecurrentiterationcompletes.ConfigureRundisplaystheConfigureRundialogbox.ResetAllstopsandrestartstheprojectandresetsallstepsintheprojecttotheirinitialstates.RunContinuouslyrunstheprojectcontinuously.RunOncerunstheprojectforoneiteration.Abortstopstheprojectimmediately,withoutwaitingforthecurrentiterationtocomplete.

NoteBecauseabortingaprojectdoesnotwaitforthefinaliterationoftheprojecttocomplete,selectingtheAbortoptionmightcauseLabVIEWSignalExpresstodisplayincompletedata.UpdateSignalsWhileRunningcontainsthefollowingoptions:

UpdateAllViewsupdatesallsignalviews,includingtheDataViewandpreviewsontheStepSetuptab,whenyouruntheproject.UpdateNoneupdatesnoneofthesignalviewswhenyouruntheproject.DoNotUpdateStepSetupTabsupdatestheDataViewbutnotthepreviewthatappearsontheStepSetuptabwhenyouruntheproject.SetDisplayUpdateRatedisplaysadialogboxyoucanusetospecifytherateinmillisecondsatwhichviewsofasignalupdatewhenyourunaproject.

CreateSnapshotdisplaystheCreateSnapshotdialogbox.RepeatLastSnapshottakesasnapshotusingtheconfigurationofthelastsnapshotyoutook.Thisoptioncreatesanewsnapshotanddoesnotoverwriteanexistingsnapshot.OperatorModecontainsthefollowingoptions:

OperatorModeEnabledenablesordisablesoperatormode.

SetOperatorModePassworddisplaystheSetOperatorPassworddialogbox,whichyoucanusetosetapasswordthatausermustentertodisableoperatormode.

DataViewMenuTheDataViewmenucontainsitemsyoucanusetomodifytheappearanceoftheDataViewtab,createsnapshotsofsignalsdisplayedontheDataViewtab,orexportvaluesofsignalsontheDataViewtabtoMicrosoftExcel.

NoteTheDataViewmenuappearsonlywhentheactivetabistheDataViewtab.

Thismenucontainsthefollowingitems:AddDisplayaddsadisplaytotheactiveDataViewtab.RenamedisplaysadialogboxyoucanusetorenametheactiveDataViewtab.NewDataViewcreatesanewDataViewtab.RemoveDataViewremovestheactiveDataViewtab.ThisoptionisenabledonlywhentheprojectincludesmorethanoneDataViewtab.Signalscontainsthefollowingoption:

CreateSnapshotscreatessnapshotsofallthesignalsdisplayedontheactiveDataViewtab.

ExportTocontainsthefollowingoption:MicrosoftExcelexportsthevaluesofeverydatapointineverysignaldisplayedontheactiveDataViewtabtoaMicrosoftExcelbookfile.IftheDataViewtabincludesmultiplesignals,eachsignalappearsonaseparateworksheetinthebookfile.

NoteLabVIEWSignalExpressdoesnotsaveMicrosoftExcelfilestowhichyouexportsignals.YoumustmanuallysavetheexportedfileinMicrosoftExcel.

WindowMenuTheWindowmenucontainsthefollowingitemsthatyoucanusetoarrangetheprojectwindowsandtonavigateamongtheprojectwindows:

ArrangeAllstacksallopenprojectwindows.NextWindowbringstothefrontthenextprojectwindowyouopen.PreviousWindowbringstothefrontthepreviousprojectwindowyouopened.

TheWindowmenualsodisplaysallopenprojectsintheapplication.Selectaprojectnametobringthatprojecttothefront.

HelpMenuTheHelpmenucontainsitemstoexplainanddefinefeaturesofLabVIEWSignalExpressandinstalledassistantsandtoaccessNationalInstrumentsTechnicalSupport.

LabVIEWSignalExpressHelpdisplaystheLabVIEWSignalExpressHelp.UsethishelpfileasareferenceforinformationabouttheLabVIEWSignalExpressenvironment.TheLabVIEWSignalExpressHelpalsoincludesstep-by-stepinstructionsforusingLabVIEWSignalExpressfeatures.TheLabVIEWSignalExpressHelpalsoincludesdocumentationforanyassistantsyouinstall.GettingStartedwithcontainsapull-rightmenuthatlistsaportabledocumentformat(PDF)oftheGettingStartedwithLabVIEWSignalExpressmanualandgettingstartedguidesforanyotherLabVIEWSignalExpresssupportedapplicationsyouhaveinstalled.OpenExampledisplaysafiledialogboxthatopenstotheSignalExpress/Examplesdirectory.UsethisoptiontonavigatetoLabVIEWSignalExpressexamplefilesandprojects.ShowWelcomeDialogdisplaystheWelcomedialogboxthatappearswhenyoufirstlaunchtheapplication.PatentsdisplaysallsoftwareandhardwarepatentsrelatedtoNationalInstruments.AboutLabVIEWSignalExpressaccessesgeneralinformationaboutthecurrentinstallationofLabVIEWSignalExpress,includingversionnumberandserialnumber.

ToolbarButtonsTheLabVIEWSignalExpresstoolbarcontainsthefollowingbuttonsyoucanusetorunandeditaprojectormodifytheLabVIEWSignalExpressenvironment:

AddStepdisplaystheAddStepmenu,whereyouselectstepstoaddtotheproject.Runrunstheprojectusingthecurrentrunmodeconfiguration.Whenyourunaproject,theRunbuttonbecomesaStopbutton.Stopstopsexecutionafterthecurrentiteration.Thisbuttonappearsonlywhenyourunaproject.Abortimmediatelystopsexecutionwithoutfinishingthecurrentiteration.

NoteInsomecases,youcannotstopaproject,forexamplewhenahardwarestepwaitsonatriggerthatdoesnotoccur.Inthiscase,clicktheAbortbuttontostopexecution.

RecordopenstheLoggingSignalsSelectiondialogbox.RecordWhileRunningspecifiestorecordthestepoutputsyouconfiguretorecordwhenyouclicktheRunbutton.ThisbuttonreplacestheRecordbuttonwhenyouselectsignalstorecordfromtheSignalSelectionpageoftheRecordingOptionstab.ResetAllsimultaneouslyresetsallstepstotheirinitialstatesandrestartstheprocessesofthesteps.Forexample,ifyouhaveastepthataveragesaseriesofnumbers,clickingtheResetAllbuttonrestartstheaveragingat0.ResetAlldoesnotresetparameterstotheirdefaultvalues.ErrorListdisplaystheerrorlist.

ProbesUseprobestoseethedataastepreturnswithouthavingtoplacethedatainagraphortableintheDataView.Touseprobes,right-clickaninputoroutputsignalintheProjectViewandselectProbefromtheshortcutmenutodisplaytheDataProbewindow.TheDataProbewindowdisplaysinformationaboutthesignal.ThecontentsoftheDataProbewindowdependonthetypeofsignalyouprobe,andyoucanprobemultiplesignalsatonce.EachprobeyousetdisplaysdatainaseparateDataProbewindow.

WorkAreasUseworkareastoperformmultipleLabVIEWSignalExpressoperationsfromwithinthesameproject.Youcanacquiredata,processsignals,logdata,andperformmeasurementsonloggeddatawithoutopeninganewproject.Whenyousaveaproject,LabVIEWSignalExpresssaveseveryworkareawithintheprojectinthesameprojectfile.

SelectingWorkAreasLabVIEWSignalExpressdisplaysthecurrentworkareainapull-downmenuabovetheProjectView.Youcanusethispull-downmenutonavigatebetweenworkareas.ClicktheiconnexttothemenutoopentheManageWorkAreasdialogbox.

YoualsocanselectView»WorkAreastoselectworkareasandopentheManageWorkAreasdialogbox.

AnalyzingLiveandLoggedDatainWorkAreasEachworkareacontainsauniqueProjectViewandDataView.Usedataloggingtoanalyzedatayouacquireinmultipleworkareas.IntheManageWorkAreasdialogbox,selecttheworkareainwhichyouwanttoperformoperationsonloggeddata,andplaceacheckmarkintheEnableplaybackoflogscheckbox.InworkareaswiththeEnableplaybackoflogsoptionenabled,youcaninteractivelyscrollthroughdataintheDataVieworprocessloggeddatabyplayingitthroughanalysissteps.

CreatingNewWorkAreasCompletethefollowingstepstoaddanewworkareatoaproject.

1. SelectView»WorkAreas»ManageWorkAreas.TheManageWorkAreasdialogboxappears.Twodefaultworkareas,Monitor/RecordandPlayback,appearintheWorkAreaslist.Youcandeleteorchangethenamesandpropertiesoftheseworkareas,oraddnewworkareas.

2. Toaddanewworkarea,clicktheNewbutton.3. EditthenameoftheworkareaintheNamefield.4. EditthedescriptionoftheworkareaintheDescriptionfield.5. Ifyouareloggingdatainanotherworkareaandyouwantto

performoperationsonloggeddatainthenewworkarea,placeacheckmarkintheEnableplaybackoflogscheckbox.UsetheMoveUpandMoveDownbuttonstochangetheorderofyourworkareas.SelectaworkareaandclicktheDeletebuttontodeleteaworkarea.

6. ClicktheOKbuttontoapplythechangesandcreatethenewworkarea.

ErrorIndicatorTheerrorindicatorappearsatthebottomoftheconfigurationviewifastepencountersanerrororwarning.Theindicatordisplaysanerrororwarningiconwithashortdescriptionoftheerrororwarning.ClicktheDetailsbuttonnexttotheshortdescriptiontodisplaythefulldescriptionoftheerrororwarning.AniconalsoappearsintheProjectViewnexttothestepthatencounteredtheerrororwarning.YoucanmovethecursorovertheicontoviewthesamefulldescriptionthatappearswhenyouclicktheDetailsbutton.

ProjectAnalyzerSelectTools»AnalyzeProjecttoexecutetheProjectAnalyzer.TheProjectAnalyzerisatoolthatanalyzesaLabVIEWSignalExpressprojectandreturnsanyerrors,warnings,incompatibilities,orotherissuesintheErrorListwindow.TheProjectAnalyzerdeterminesthetaskyouwanttocompleteandreturnspotentialissueswiththecurrentLabVIEWSignalExpressconfigurationthatcanpreventtheprojectfromexecutingproperly.Bydefault,LabVIEWSignalExpressexecutestheProjectAnalyzereachtimeyoumakeachangeinLabVIEWSignalExpress.TodisabletheProjectAnalyzerfromexecutingeachtimeyoumakeachange,selectTools»OptionstodisplaytheOptionsdialogbox.OntheExecutionpage,selectNofromtheAnalyzeProjectaftereverychangeoption.

HandlingErrorsandWarningsIfastepencountersanerror,itstopsexecutingandallstepsthatprocessoutputsignalsfromthatstepalsostopexecuting.Ifyouchangetheconfigurationofthestepstocorrecttheerrororifthestateoftheprojectchangesinsuchawaythattheerrorcorrectsitselfautomatically,thestepthatreturnedtheerrorstartsexecutingagainandclearsitserror.Subsequentstepsthatinheritdatafromthestepalsostartexecutingagain.Warningshavenoeffectontheexecutionoftheproject.Whenastepreturnsawarning,thestepcontinuestoexecuteandprovidesignalstosubsequentsteps.

KeyboardShortcutsThefollowingtablelistskeyboardshortcutsintheLabVIEWSignalExpressenvironment.

KeyboardShortcut Description

FileOperationsCtrl-N Opensanew,emptyproject.Ctrl-O Opensanexistingproject.Ctrl-F4 Closesthecurrentproject.Ctrl-S Savesthecurrentproject.Ctrl-Shift-S Displaysafiledialogboxandsavesthecurrentproject

usingthenameyouspecifyinthedialogbox.BasicEditingCtrl-X Cutstheselectedobjectortext.Ctrl-C Copiestheselectedobjectortext.Ctrl-V Pastestheobjectortext.Forsteps,pastesthecopiedstep

aftertheselectedstep.Ctrl-Shift-V Pastesastepbeforetheselectedstep.Ctrl-Z Undoesthelastaction.Ctrl-Y Redoesthelastaction.ProjectExecutionCtrl-R Runstheprojectusingthecurrentrunmodeconfiguration.Ctrl-E Runstheprojectcontinuously.Ctrl-Shift-R Runstheprojectonce.Ctrl-Delete,Ctrl-.

Stopsarunningprojectwhenthecurrentiterationcompletes.

Ctrl-A Abortsarunningprojectimmediately.Ctrl-Shift-T Createsasnapshot.Ctrl-T Repeatsthelastsnapshot.

ImportantInformationWarrantyCopyrightTrademarksPatentsWarningRegardingUseofNIProducts

WarrantyThemediaonwhichyoureceiveNationalInstrumentssoftwarearewarrantednottofailtoexecuteprogramminginstructions,duetodefectsinmaterialsandworkmanship,foraperiodof90daysfromdateofshipment,asevidencedbyreceiptsorotherdocumentation.NationalInstrumentswill,atitsoption,repairorreplacesoftwaremediathatdonotexecuteprogramminginstructionsifNationalInstrumentsreceivesnoticeofsuchdefectsduringthewarrantyperiod.NationalInstrumentsdoesnotwarrantthattheoperationofthesoftwareshallbeuninterruptedorerrorfree.AReturnMaterialAuthorization(RMA)numbermustbeobtainedfromthefactoryandclearlymarkedontheoutsideofthepackagebeforeanyequipmentwillbeacceptedforwarrantywork.NationalInstrumentswillpaytheshippingcostsofreturningtotheownerpartswhicharecoveredbywarranty.NationalInstrumentsbelievesthattheinformationinthisdocumentisaccurate.Thedocumenthasbeencarefullyreviewedfortechnicalaccuracy.Intheeventthattechnicalortypographicalerrorsexist,NationalInstrumentsreservestherighttomakechangestosubsequenteditionsofthisdocumentwithoutpriornoticetoholdersofthisedition.ThereadershouldconsultNationalInstrumentsiferrorsaresuspected.InnoeventshallNationalInstrumentsbeliableforanydamagesarisingoutoforrelatedtothisdocumentortheinformationcontainedinit.EXCEPTASSPECIFIEDHEREIN,NATIONALINSTRUMENTSMAKESNOWARRANTIES,EXPRESSORIMPLIED,ANDSPECIFICALLYDISCLAIMSANYWARRANTYOFMERCHANTABILITYORFITNESSFORAPARTICULARPURPOSE.CUSTOMER'SRIGHTTORECOVERDAMAGESCAUSEDBYFAULTORNEGLIGENCEONTHEPARTOFNATIONALINSTRUMENTSSHALLBELIMITEDTOTHEAMOUNTTHERETOFOREPAIDBYTHECUSTOMER.NATIONALINSTRUMENTSWILLNOTBELIABLEFORDAMAGESRESULTINGFROMLOSSOFDATA,PROFITS,USEOFPRODUCTS,ORINCIDENTALORCONSEQUENTIALDAMAGES,EVENIFADVISEDOFTHEPOSSIBILITYTHEREOF.ThislimitationoftheliabilityofNationalInstrumentswillapplyregardlessoftheformofaction,whetherincontractortort,includingnegligence.AnyactionagainstNationalInstrumentsmustbebroughtwithinoneyearafterthecauseofaction

accrues.NationalInstrumentsshallnotbeliableforanydelayinperformanceduetocausesbeyonditsreasonablecontrol.Thewarrantyprovidedhereindoesnotcoverdamages,defects,malfunctions,orservicefailurescausedbyowner'sfailuretofollowtheNationalInstrumentsinstallation,operation,ormaintenanceinstructions;owner'smodificationoftheproduct;owner'sabuse,misuse,ornegligentacts;andpowerfailureorsurges,fire,flood,accident,actionsofthirdparties,orothereventsoutsidereasonablecontrol.

CopyrightUnderthecopyrightlaws,thispublicationmaynotbereproducedortransmittedinanyform,electronicormechanical,includingphotocopying,recording,storinginaninformationretrievalsystem,ortranslating,inwholeorinpart,withoutthepriorwrittenconsentofNationalInstrumentsCorporation.NationalInstrumentsrespectstheintellectualpropertyofothers,andweaskouruserstodothesame.NIsoftwareisprotectedbycopyrightandotherintellectualpropertylaws.WhereNIsoftwaremaybeusedtoreproducesoftwareorothermaterialsbelongingtoothers,youmayuseNIsoftwareonlytoreproducematerialsthatyoumayreproduceinaccordancewiththetermsofanyapplicablelicenseorotherlegalrestriction.

TrademarksNationalInstruments,NI,ni.com,andLabVIEWaretrademarksofNationalInstrumentsCorporation.RefertotheTermsofUsesectiononni.com/legalformoreinformationaboutNationalInstrumentstrademarks.FireWire®istheregisteredtrademarkofAppleComputer,Inc.HandleGraphics®,MATLAB®,Real-TimeWorkshop®,Simulink®,Stateflow®,andxPCTargetBox®areregisteredtrademarks,andTargetBox™andTargetLanguageCompiler™aretrademarksofTheMathWorks,Inc.Tektronix®andTekareregisteredtrademarksofTektronix,Inc.TheBluetooth®wordmarkisaregisteredtrademarkownedbytheBluetoothSIG,Inc.Otherproductandcompanynamesmentionedhereinaretrademarksortradenamesoftheirrespectivecompanies.MembersoftheNationalInstrumentsAlliancePartnerProgramarebusinessentitiesindependentfromNationalInstrumentsandhavenoagency,partnership,orjoint-venturerelationshipwithNationalInstruments.

PatentsForpatentscoveringNationalInstrumentsproducts,refertotheappropriatelocation:Help»Patentsinyoursoftware,thepatents.txtfileonyourmedia,orni.com/patents.

WARNINGREGARDINGUSEOFNATIONALINSTRUMENTSPRODUCTS(1)NATIONALINSTRUMENTSPRODUCTSARENOTDESIGNEDWITHCOMPONENTSANDTESTINGFORALEVELOFRELIABILITYSUITABLEFORUSEINORINCONNECTIONWITHSURGICALIMPLANTSORASCRITICALCOMPONENTSINANYLIFESUPPORTSYSTEMSWHOSEFAILURETOPERFORMCANREASONABLYBEEXPECTEDTOCAUSESIGNIFICANTINJURYTOAHUMAN.(2)INANYAPPLICATION,INCLUDINGTHEABOVE,RELIABILITYOFOPERATIONOFTHESOFTWAREPRODUCTSCANBEIMPAIREDBYADVERSEFACTORS,INCLUDINGBUTNOTLIMITEDTOFLUCTUATIONSINELECTRICALPOWERSUPPLY,COMPUTERHARDWAREMALFUNCTIONS,COMPUTEROPERATINGSYSTEMSOFTWAREFITNESS,FITNESSOFCOMPILERSANDDEVELOPMENTSOFTWAREUSEDTODEVELOPANAPPLICATION,INSTALLATIONERRORS,SOFTWAREANDHARDWARECOMPATIBILITYPROBLEMS,MALFUNCTIONSORFAILURESOFELECTRONICMONITORINGORCONTROLDEVICES,TRANSIENTFAILURESOFELECTRONICSYSTEMS(HARDWAREAND/ORSOFTWARE),UNANTICIPATEDUSESORMISUSES,ORERRORSONTHEPARTOFTHEUSERORAPPLICATIONSDESIGNER(ADVERSEFACTORSSUCHASTHESEAREHEREAFTERCOLLECTIVELYTERMED"SYSTEMFAILURES").ANYAPPLICATIONWHEREASYSTEMFAILUREWOULDCREATEARISKOFHARMTOPROPERTYORPERSONS(INCLUDINGTHERISKOFBODILYINJURYANDDEATH)SHOULDNOTBERELIANTSOLELYUPONONEFORMOFELECTRONICSYSTEMDUETOTHERISKOFSYSTEMFAILURE.TOAVOIDDAMAGE,INJURY,ORDEATH,THEUSERORAPPLICATIONDESIGNERMUSTTAKEREASONABLYPRUDENTSTEPSTOPROTECTAGAINSTSYSTEMFAILURES,INCLUDINGBUTNOTLIMITEDTOBACK-UPORSHUTDOWNMECHANISMS.BECAUSEEACHEND-USERSYSTEMISCUSTOMIZEDANDDIFFERSFROMNATIONALINSTRUMENTS'TESTINGPLATFORMSANDBECAUSEAUSERORAPPLICATIONDESIGNERMAYUSENATIONALINSTRUMENTSPRODUCTSINCOMBINATIONWITHOTHERPRODUCTSINAMANNERNOTEVALUATEDORCONTEMPLATEDBYNATIONALINSTRUMENTS,THEUSEROR

APPLICATIONDESIGNERISULTIMATELYRESPONSIBLEFORVERIFYINGANDVALIDATINGTHESUITABILITYOFNATIONALINSTRUMENTSPRODUCTSWHENEVERNATIONALINSTRUMENTSPRODUCTSAREINCORPORATEDINASYSTEMORAPPLICATION,INCLUDING,WITHOUTLIMITATION,THEAPPROPRIATEDESIGN,PROCESSANDSAFETYLEVELOFSUCHSYSTEMORAPPLICATION.

TechnicalSupportandProfessionalServicesVisitthefollowingsectionsoftheaward-winningNationalInstrumentsWebsiteatni.comfortechnicalsupportandprofessionalservices:

Support—Technicalsupportresourcesatni.com/supportincludethefollowing:

Self-HelpResources—Foranswersandsolutions,visitni.com/supportforsoftwaredriversandupdates,asearchableKnowledgeBase,productmanuals,step-by-steptroubleshootingwizards,thousandsofexampleprograms,tutorials,applicationnotes,instrumentdrivers,andsoon.RegisteredusersalsoreceiveaccesstotheNIDiscussionForumsatni.com/forums.NIApplicationsEngineersmakesureeveryquestionsubmittedonlinereceivesananswer.StandardServiceProgramMembership—ThisprogramentitlesmemberstodirectaccesstoNIApplicationsEngineersviaphoneandemailforone-to-onetechnicalsupport,aswellasexclusiveaccesstoondemandtrainingmodulesviatheServicesResourceCenter.NIofferscomplementarymembershipforafullyearafterpurchase,afterwhichyoumayrenewtocontinueyourbenefits.Forinformationaboutothertechnicalsupportoptionsinyourarea,visitni.com/servicesorcontactyourlocalofficeatni.com/contact.

TrainingandCertification—Visitni.com/trainingforself-pacedtraining,eLearningvirtualclassrooms,interactiveCDs,andCertificationprograminformation.Youalsocanregisterforinstructor-led,hands-oncoursesatlocationsaroundtheworld.SystemIntegration—Ifyouhavetimeconstraints,limitedin-housetechnicalresources,orotherprojectchallenges,NationalInstrumentsAlliancePartnermemberscanhelp.Tolearnmore,callyourlocalNIofficeorvisitni.com/alliance.DeclarationofConformity(DoC)—ADoCisourclaimofcompliancewiththeCounciloftheEuropeanCommunitiesusingthemanufacturersdeclarationofconformity.Thissystemaffords

theuserprotectionforelectromagneticcompatibility(EMC)andproductsafety.YoucanobtaintheDoCforyourproductbyvisitingni.com/certification.CalibrationCertificate—Ifyourproductsupportscalibration,youcanobtainthecalibrationcertificateforyourproductatni.com/calibration.

Ifyousearchedni.comandcouldnotfindtheanswersyouneed,contactyourlocalofficeorNIcorporateheadquarters.YoualsocanvisittheWorldwideOfficessectionofni.com/niglobaltoaccessthebranchofficeWebsites,whichprovideup-to-datecontactinformation,supportphonenumbers,emailaddresses,andcurrentevents.

JavaScriptDisabledTheHTMLfileyouaretryingtoaccessusesJavaScript.IfyouareviewingthefilefromyourcomputerorfromaCDorDVDandyouhaveInternetExplorer4.0orlaterinstalled,JavaScriptisenabledbydefault.Ifyouareviewingthefilefromanetwork,suchasonanintranetorontheWeb,orifyoudonothaveInternetExplorer4.0orlaterinstalled,youmustenableJavaScripttoviewthefile.

DisplayPropertiesDialogBoxRight-clickadisplayontheDataViewtabandselectPropertiesfromtheshortcutmenutodisplaythisdialogbox.Usethepagesofthisdialogboxtoconfiguretheappearanceandbehaviorofthedisplay.Thepagesthatappeardependontheformatofthedisplayyouareconfiguring.Thisdialogboxcancontainthefollowingpages:

Title—SetsthetitleoftheselecteddisplayandspecifieswhetherLabVIEWSignalExpressshowsdisplaytitles.FormatandPrecision—Setstheformatandprecisionofnumericcomponentsofadisplay,suchastheunitsofascaleonagraphaxis.Plots—Setstheappearanceofplotsonagraphorchartdisplay.Scales—Setstheappearanceofscalesandgridsongraphandchartdisplays.Cursors—Setstheappearanceandbehaviorofcursorsonagraphorchartdisplay.SignalOrder—Setstheorderofsignalsonagraphorchartdisplay.Advanced—SetstheappearanceofBooleanindicatorsonanLEDdisplay.

TitlePage(DisplayPropertiesDialogBox)ClickthePropertiesbuttonontheDataViewtaborright-clickadisplayandselectPropertiesfromtheshortcutmenutodisplaytheDisplayPropertiesdialogbox.SelecttheTitletabtodisplaythispage.UsethispagetosetthetitleoftheselecteddisplayandtospecifywhetherLabVIEWSignalExpressshowsdisplaytitlesonthecurrentDataViewtab.Thispageincludesthefollowingcomponents:

DisplayTitle—Specifiesthetitleoftheselecteddisplay.DataView—Containsthefollowingcomponents:

DataViewTitle—SpecifiesthetitleofthecurrentDataViewtab.ShowDisplayTitles—SpecifieswhetherdisplaysonthecurrentDataViewtabappearwithdisplaytitles.Removethecheckmarkfromthischeckboxtohidedisplaytitles.

FormatandPrecisionPage(DisplayPropertiesDialogBox)ClickthePropertiesbuttonontheDataViewtaborright-clickadisplayandselectPropertiesfromtheshortcutmenutodisplaytheDisplayPropertiesdialogbox.SelecttheFormatandPrecisiontabtodisplaythispage.Usethispagetoconfiguretheformatandprecisionofanumericdisplayorthenumericcomponentsofotherdisplays,suchastheunitsofascaleonagraphaxis.Thispageincludesthefollowingcomponents:

Component—Specifiesthenumericcomponent,suchastheaxisofagraph,forwhichyouareconfiguringtheformatandprecision.Thiscomponentappearsonlyfordisplaysthathavemultiplenumericcomponents.Formattype—Typeofthenumericcomponent.Youcanselectfromthefollowingoptions:

Floatingpoint—Displaysthenumericcomponentinfloating-pointnotation.Scientific—Displaysthenumericcomponentinscientificnotation.Forexample,60infloating-pointnotationequals6E+1inscientific,whereErepresentsthepowerof10exponent.Automaticformatting—DisplaysthenumericcomponentintheformatthatLabVIEWSignalExpressdeterminesisappropriateforthedata.LabVIEWSignalExpresschooseseitherscientificnotationorfloating-pointnotationbasedonthenumbertoformat.SInotation—DisplaysthenumericcomponentinSystemInternational(SI)notation,inwhichtheunitofmeasurementappearsafterthevalue.Forexample,6000infloating-pointnotationequals6kinSInotation.Decimal—Displaysthenumericcomponentinbase-10decimalformat.Hexadecimal—Displaysthenumericcomponentinbase-16format.Validdigitsare0toF.Forexample,60in

floating-pointnotationequals3cinhexadecimal.Octal—Displaysthenumericcomponentinbase-8format.Validdigitsare0to7.Forexample,60infloating-pointnotationequals74inoctal.Binary—Displaysthenumericcomponentinbase-2format.Validdigitsare0and1.Forexample,60infloating-pointnotationequals111100inbinary.Absolutetime—Displaysthenumericcomponentintermsoftimeelapsedsince12:00a.m.,January1,1904,UniversalTime.Relativetime—Displaysthenumericcomponentintermsofhours,minutes,andsecondsstartingfromzero.Forexample,100infloating-pointnotationequals1:40inrelativetime.

Digits—[Formattype:Floatingpoint,Scientific,Automaticformatting,SInotation]IfPrecisionTypeisDigitsofprecision,thisfieldcontainsthenumberofdigitstodisplayafterthedecimalpoint.IfPrecisionTypeisSignificantdigits,thisfieldcontainsthenumberofsignificantdigitstodisplay.PrecisionType—[Formattype:Floatingpoint,Scientific,Automaticformatting,SInotation]Specifieswhethertodisplaydigitsofprecisionorsignificantdigits.SelectDigitsofprecisionifyouwanttheDigitsfieldtoindicatethenumberofdigitstodisplayafterthedecimalpoint.SelectSignificantdigitsifyouwanttheDigitsfieldtoindicatethenumberofsignificantdigitstodisplay.Hidetrailingzeros—[Formattype:Floatingpoint,Scientific,Automaticformatting,SInotation]Removeszerosattheendofthenumber.Ifthenumberhasnofractionalpart,thisoptionalsoremovesthedescriptionpart.Exponentinmultiplesof3—[Formattype:Scientific,Automaticformatting]Formatsthenumberinengineeringnotation,wheretheexponentisalwaysamultipleofthree.Useminimumfieldwidth—[Formattype:Floatingpoint,Scientific,Automaticformatting,SInotation,Hexadecimal,Octal,Binary]Padsanyexcessspacetotheleftorrightofthenumberwithzerosorspacestoreachtheminimumwidthyouenterin

Minimumfieldwidth.PlaceacheckmarkinthischeckboxtosettheMinimumfieldwidthandPadding.

Minimumfieldwidth—Widthtowhichyouwanttopadthenumber.Padding—Setswhethertopadwithspacesontheleftorrightortopadwithzerosontheleft.

TimeType—[Formattype:Absolutetime,Relativetime]Setstheformatofthetimedisplayedinthenumericcomponent.Customtimeformatusestheformatyouconfigureinthisdialogboxusingthefollowingcomponents.Systemtimeformatusestheformatoftheoperatingsystem.SelectTimeunusedifyoudonotwanttodisplaythetimeinthenumericcomponent.

AM/PMtype—Specifiesthetypeofclocktousetoformatthetime.Youcanselectoneofthefollowingoptions:

AM/PM—Specifiestousea12-hourclock.24-hour—Specifiestousea24-hourclock.

HMStype—Setswhethertodisplayhoursandminutesorhours,minutes,andseconds.Youcanselectoneofthefollowingoptions:

HH:MM—Specifiestodisplaythetimeinhoursandminutes.HH:MM:SS—Specifiestodisplaythetimeinhours,minutes,andseconds.

Digits—Specifiesanumberofdigitstousetodisplayfractionsofseconds.

DateType—[Formattype:Absolutetime,Relativetime]Setstheformatofthedatedisplayedinthenumericcomponent.Customdateformatusestheformatyouconfigureinthisdialogboxusingthefollowingcomponents.Systemdateformatusestheformatoftheoperatingsystem.SelectDateunusedifyoudonotwanttodisplaythedateinthenumericcomponent.

MDYtype—Specifiestheorderinwhichtodisplaythemonth,day,andyear.Youcanselectoneofthefollowingoptions:

M/D/Y—Specifiestodisplaythedateinthefollowingorder:month/day/year.

D/M/Y—Specifiestodisplaythedateinthefollowingorder:day/month/year.Y/M/D—Specifiestodisplaythedateinthefollowingorder:year/month/day.

Yeartype—Setswhethertodisplaytheyearandwhethertodisplayitas2or4digits.Youcanselectoneofthefollowingoptions:

Donotshowyear—Specifiesnottodisplaytheyear.2-digityear—Specifiestodisplaytheyearas2digits.4-digityear—Specifiestodisplaytheyearas4digits.

PlotsPage(DisplayPropertiesDialogBox)ClickthePropertiesbuttonontheDataViewtaborright-clickadisplayandselectPropertiesfromtheshortcutmenutodisplaytheDisplayPropertiesdialogbox.SelectthePlotstabtodisplaythispage.Usethispagetoconfiguretheappearanceofplotsonagraphorchartdisplay.Thispageincludesthefollowingcomponents:

Plot—Specifiestheplotyouwanttoconfigure.LineStyle—Specifiesthelinestyleoftheplot.LineWidth—Specifiesthelinewidthoftheplot.PointStyle—Specifiesthepointstyleoftheplot.PlotInterpolation—Specifiestheinterpolationoftheplot.Colors—Specifiesthecolorandstyleoftheplotline.Containsthefollowingcomponents:

Line—Specifiesthecoloroftheplotline.Point/fill—Specifiesthecolorofthepointandfills.Fillto—Specifiesthebaselineofthefill.

Showplot—Specifieswhethertodisplaytheplotonthegraph.Removethecheckmarkfromthischeckboxtohidetheplot.Thisoptionissimilartothecheckboxthatappearsnexttoasignalnameonthegraphlegend.Y-scale—Specifiesthey-scaletoassociatewiththeplot.

ScalesPage(DisplayPropertiesDialogBox)ClickthePropertiesbuttonontheDataViewtaborright-clickadisplayandselectPropertiesfromtheshortcutmenutodisplaytheDisplayPropertiesdialogbox.SelecttheScalestabtodisplaythispage.Usethispagetoformatscalesandgridsongraphandchartdisplays.Thispageincludesthefollowingcomponents:

Scale—Specifiesthescaleyouwanttoconfigure.Name—Specifiesthenameofthescale.Showscalelabel—Specifieswhethertodisplaythenameofthescale,Name,onthegraphorchartdisplay.Showscale—Specifieswhethertodisplaythescaleonthegraphorchartdisplay.Log—Specifieswhethertomapthescalelogarithmically.Removethecheckmarkfromthischeckboxtomapthescalelinearly.TimestampType—Specifiesthetypeoftimestamptoassociatewiththeplot.Youcanselectfromthefollowingoptions:

Ignore—Specifiestonotassociateanytimestampwiththeplot.LabVIEWSignalExpressdisplaysallsignalsstartingattime0,regardlessofwhenyoubeginacquiringthesignal.Absolute—Specifiestoassociatetheabsolutetimewiththeplot.LabVIEWSignalExpressdisplaysallsignalsstartingattheabsolutetimeatwhichyoubeginacquiringthesignal.RelativeTo:signal—Specifiestoplotsignalstartingattime0andtoplottheothersignal(s)relativetothatsignal.Forexample,ifyoubeginacquiringtheothersignal(s)10secondsafteryoubeginacquiringsignal,LabVIEWSignalExpressdisplayssignalstartingattime0andtheothersignal(s)startingattime10.

X-AxisSignal—Specifesthesignaltouseforthex-axis.Thisoptionappearsonlyifthedisplayyouareconfiguringisanxygraphdisplay.Autoscale—SpecifieswhetherLabVIEWSignalExpresssetsthe

scaleautomaticallybasedonthedatainthegraph.Removethecheckmarkfromthischeckboxifyouwanttospecifyarangeforthescale.

Minimum—Specifiestheminimumvalueofthescale.RemovethecheckmarkfromtheAutoscalecheckboxtoenablethiscomponent.Maximum—Specifiesthemaximumvalueofthescale.RemovethecheckmarkfromtheAutoscalecheckboxtoenablethiscomponent.

ScalingFactors—Specifythevalueattheoriginoftheplotandadjustthescaleoftheplot.Forexample,toplotatime-domainwaveforminmillisecondsstartingatareferencetime,setOffsettothereferencetimeandMultiplierto0.001,becauseLabVIEWSignalExpressdisplaystimeinsecondsbydefault.

Offset—Specifiestheinitialvalueforscalingdata.IfyouchangeOffset,thescalenolongeruses0astheoriginoftheplot.Multiplier—Specifiesthemultiplier,orinterval,forscalingdata.

ScaleStyleandColors—Specifiestheappearanceofthescale.Clickthebuttontodisplayapull-downmenuofscalestyleoptions.Thissectionalsocontainsthefollowingcomponentsforspecifyingthecolorofthescale:

Majortick—Specifiesthecolorofthemajortickmark.Minortick—Specifiesthecoloroftheminortickmark.Markertext—Specifiesthecolorofthescalemarkertext.

GridStyleandColors—Specifiestheappearanceofthegrid.Clickthebuttontodisplayapull-downmenuofgridstyleoptions.Thissectionalsocontainsthefollowingcomponentsforspecifyingthecolorofthegrid:

Majorgrid—Specifiesthecolorofthemajorgridline.Minorgrid—Specifiesthecoloroftheminorgridline.BGColor—Specifiesthebackgroundcolorofthegraph.

CursorsPage(DisplayPropertiesDialogBox)ClickthePropertiesbuttonontheDataViewtaborright-clickadisplayandselectPropertiesfromtheshortcutmenutodisplaytheDisplayPropertiesdialogbox.SelecttheCursorstabtodisplaythispage.Usethispagetoconfiguretheappearanceandbehaviorofcursorsonagraphorchartdisplay.Thispageincludesthefollowingcomponents:

ShowCursors—Specifieswhethertodisplaycursorsontheselectedgraphdisplay.PlaceacheckmarkinthischeckboxtoenablethecomponentsontheCursorspage.Cursor—Specifiesthecursoryouwanttoconfigure.Settings—Containsthefollowingcomponents:

Linestyle—Specifiesthelinestyleofthecursor.Linewidth—Specifiesthelinewidthofthecursor.Pointstyle—Specifiesthestyleofthepointwherethecrosshairsofthecursorintersect.Crosshairstyle—Specifiesthestyleofthecrosshairsofthecursor.PeakThreshold—SpecifiesthevalueasignalmustcrossbeforeLabVIEWSignalExpressrecognizespeakvalues.PeakWidth—SpecifieshowfarabovethePeakThresholdvalueasignalmustbebeforeLabVIEWSignalExpressrecognizespeakvalues.Cursorcolor—Specifiesthecolorofthecursor.Linkedtoplot—Specifiestheplottowhichtolinkthecursor.LinkCursors—Specifieswhethertolinkthecursorsontheselectedplottoeachother.Ifyouplaceacheckmarkinthischeckbox,movingCursor1movesbothcursorssimultaneously.MovingCursor2movesonlythatcursorandchangesthedistancebetweenthelinkedcursors.

Measurements—Containsthefollowingcomponentsforconfiguringthemeasurementsthatappearinthecursorlegend:

CursorMeasurements—Displaysthemeasurementsyoucandisplayinthecursorlegend,exportasstepinputs,andbindtostepparameters.Thistableincludesthefollowingcolumns:

Name—Displaysthenamesofthecursormeasurements.Show—SpecifieswhetherLabVIEWSignalExpressdisplaysthecursormeasurementsinthecursorlegend.Export—SpecifieswhetherLabVIEWSignalExpressexportsthecursormeasurements.IfyouplaceacheckmarkintheExportcheckboxforacursormeasurement,youcanusethevalueofthemeasurementasastepinput.Bind—Specifieswhethertobindthevalueofacursormeasurementtoastepparameter.ClickthebuttonintheBindcolumnforacursormeasurementtodisplaytheBindingSelectiondialogbox.UsetheBindingSelectiondialogboxtoselecttheparametertowhichtobindthecursormeasurement.

NoteWhenyoubindacursormeasurementtoastepparameter,LabVIEWSignalExpressexportsthecursormeasurementautomatically.

TrackMinimum—Specifieswhetherthecursortracksthecurrentminimumvalueofthesignalplottowhichyoulinkthecursor.Ifyouplaceacheckmarkinthischeckboxandruntheprojectcontinuously,thecursormoveswhenLabVIEWSignalExpressdetectsanewminimumvalue.TrackMaximum—Specifieswhetherthecursortracksthecurrentmaximumvalueofthesignalplottowhichyoulinkthecursor.Ifyouplaceacheckmarkinthischeckboxandruntheprojectcontinuously,thecursormoveswhenLabVIEWSignalExpressdetectsanewmaximumvalue.

Linking—Containsthefollowingcomponentforconfiguringthelinkingofcursorsondifferentdisplays:

Linking—Listsdisplayswithcursorstowhichyoucan

linkthecursoronthedisplayyouareconfiguring.Placeacheckmarkinthecheckboxnexttoadisplaynametolinkthecursorsonthetwodisplays.Cursorsyoulinkacrossdisplaysmovesimultaneouslywhenyoumoveoneofthecursors.

SignalOrderPage(DisplayPropertiesDialogBox)ClickthePropertiesbuttonontheDataViewtaborright-clickadisplayandselectPropertiesfromtheshortcutmenutodisplaytheDisplayPropertiesdialogbox.SelecttheSignalOrdertabtodisplaythispage.Usethispagetochangetheorderofsignalsonagraphorchartdisplay.Thispageincludesthefollowingcomponents:

Signals—Liststhesignalsonthegraphorchartdisplayinorderfromfirsttolast.MoveForward—Movestheselectedsignalforwardintheorder.IntheSignalslist,selectasignalthatisnotthefirstsignaltoenablethisbutton.MoveBackward—Movestheselectedsignalbackintheorder.IntheSignalslist,selectasignalthatisnotthelastsignaltoenablethisbutton.MoveToFront—Makestheselectedsignalfirstinthesignalorder.IntheSignalslist,selectasignalthatisnotthefirstsignaltoenablethisbutton.MoveToBack—Makestheselectedsignallastinthesignalorder.IntheSignalslist,selectasignalthatisnotthelastsignaltoenablethisbutton.

AdvancedPage(DisplayPropertiesDialogBox)ClickthePropertiesbuttonontheDataViewtaborright-clickadisplayandselectPropertiesfromtheshortcutmenutodisplaytheDisplayPropertiesdialogbox.SelecttheAdvancedtabtodisplaythispage.UsethispagetoconfiguretheappearanceofBooleanindicatorsonanLEDdisplay.Thispageincludesthefollowingcomponents:

Truecolor—SpecifiesthecoloroftheBooleanindicatorintheonorTRUEstate.Falsecolor—SpecifiesthecoloroftheBooleanindicatorintheofforFALSEstate.

ConfigureRunDialogBoxSelectOperate»ConfigureRunorclickthedownarrowontheRunbuttonandselectConfigureRunfromthepull-downmenutodisplaythisdialogbox.UsethisdialogboxtoconfiguretherunmodeforaLabVIEWSignalExpressproject.Thisdialogboxincludesthefollowingcomponents:

Runtheproject—Containsthefollowingoptionsforrunningtheproject:

ForxIteration(s)—SpecifiesthenumberofiterationsforwhichyouwanttheprojecttorunwhenyouclicktheRunbutton.ForxSeconds—SpecifiesthetimeinsecondsforwhichyouwanttheprojecttorunwhenyouclicktheRunbutton.Continuously—SpecifiestoruntheprojectcontinuouslywhenyouclicktheRunbutton.

Createasnapshotofallsignalswhentheprojectfinishesrunning—Specifieswhethertocreateasnapshotofallthesignalsintheprojectwhentheprojectfinishesrunning.

LoggingPage(OptionsDialogBox)SelectTools»OptionstodisplaytheOptionsdialogboxandselectLoggingfromtheCategorylisttodisplaythispage.UsethispagetosetoptionsforloggingdatainLabVIEWSignalExpress.Thispageincludesthefollowingcomponents:

Miscellaneous—Containsthefollowingmiscellaneousloggingoptions:

AutomaticallyexportlogtoASCIIfile—SpecifieswhetherLabVIEWSignalExpresscreatesanASCIItextfileofloggeddataeverytimeyoucreatealog.Thisoptionissimilartoright-clickingasignalintheLoggedDatawindowandselectingConverttoASCIIfromtheshortcutmenu.Activatenewlogs—Specifieswhetheranewdatalogbecomestheactivelogbydefault.Preparelogdataforviewing—SpecifieswhenandifLabVIEWSignalExpresspreparesloggeddataforviewingontheDataViewtab.Becausemostloggingoperationsacquirenumerouspointsofdata,LabVIEWSignalExpressmustprocessthelogsoyoucanviewitonareasonablescaleinadisplayontheDataViewtab.Youcanselectfromthefollowingoptions:

Duringlogging—(Default)LabVIEWSignalExpresspreparesloggeddataforviewingasitlogsthedata.Afterloggingcompletes—LabVIEWSignalExpresspreparesloggeddataforviewingafterthelogiscomplete.Thisoptioncanimproveloggingperformanceonlargedatalogs.Never—LabVIEWSignalExpressdoesnotprepareloggeddataforviewing.Thisoptionprovidesmaximumperformancebenefitsifyouarerecordingaverylargelog,suchasifyouareloggingformultipledays.Ifyouwanttoviewthedata,youcanright-clickthelogintheLoggedDatawindowandselectMakeLogViewable

fromtheshortcutmenu.DisableUIupdateswhilelogging—SpecifieswhetherLabVIEWSignalExpressdisablesupdatesofasignalgraphontheDataViewtabwhileyoulogthesignal.DisablingUIupdatescanimproveperformancewhilelogging.Inheritplaybackconfiguration—SpecifieswhetheranewloginheritsthesettingsyouspecifyonthePlaybackOptionstabforthepreviouslog.Bydefault,LabVIEWSignalExpressresetsplaybackoptionseachtimeyoucreateanewlog.Restartloggingonerror—SpecifieswhetherLabVIEWSignalExpressrestartsaloggingoperationifanerroroccurs.Lognamingconvention—SpecifiesthenamingconventionLabVIEWSignalExpressusesfornewlogs.Youcanselectfromthefollowingoptions:

Date&Time—(Default)LabVIEWSignalExpressnamesnewlogsusingthedateandtimeatwhichyourecordthelog.Time—LabVIEWSignalExpressnamesnewlogsusingthetimeatwhichyourecordthelog.User-definedname—LabVIEWSignalExpressnamesnewlogsusinganamethatyoudefine.

Savecopyofprojectnexttologfiles—SpecifieswhetherLabVIEWSignalExpresssavesacopyoftheprojectyouusetorecordaloginthedirectoryinwhichyousavethelog.Defaultstoragedirectory—SpecifiesthedefaultdirectoryinwhichLabVIEWSignalExpresssaveslogfiles.

NoteIfyousetStorelogfilesnexttoprojectfiletoYes,LabVIEWSignalExpresssaveslogfilesinthedirectorythatcontainstheprojectregardlessoftheDefaultstoragedirectoryyouspecify.

Storelogfilesnexttoprojectfile—Specifieswhether

LabVIEWSignalExpresssaveslogfilesinthedirectorythatcontainstheprojectbydefault.SettingthisoptiontoYesoverridestheDefaultstoragedirectoryyouspecify.

OptionsDialogBoxUsethisdialogboxtosetLabVIEWSignalExpressoptions.YoucancustomizetheLabVIEWSignalExpressenvironmentaswellasdatahandling,execution,andloggingbehavior.UsetheCategorylistattheleftsideofthedialogboxtosetthefollowingoptions:

General—SetsoptionsfortheAddSteppalette,theLabVIEWSignalExpressenvironment,theEventLog,andtheProjectView.Data—SetsoptionsforexportingdatafromLabVIEWSignalExpress.DataView—SetsdisplayoptionsfortheDataView.Execution—Setsprojectexecutionoptions.Logging—Setsdataloggingoptions.

DefineSignalDialogBoxDefinesoreditsalimitsignalfortheLimitTeststep.IntheConfigurationpageoftheLimitTeststep,clicktheDefineUpperLimit,DefineLowerLimit,orDefineSingleLimitbuttonstodisplaythisdialogbox.Youcanspecifythesignalusingaseriesofdatapointsthatrepresentthex,timeorfrequency,andycoordinatesforthecornerpointsofyoursignal.Theresultinglimitsignaliscomposedofaseriesofstraightlinesegmentsthatconnectthesepoints.Thisdialogboxincludesthefollowingcomponents:

DataPoints—Displaysthevaluesyouentertocreatethesignal.YoucanentervaluesdirectlyinthecellsofthetableorusetheoptionsintheRescalelimitsectiontocreateasignal.Insert—AddsanewrowtotheDataPointstable.Delete—RemovesthevaluesintheDataPointstable.Rescalelimit—Containsthefollowingoptionsfordefiningvalues:

Newmin.Time—Specifiestheminimumvalueforthex-axisscale.Newmax.Time—Specifiesthemaximumvalueforthex-axisscale.Newmin.Ampl.—Specifiestheminimumvalueforthey-axisscale.Newmax.Ampl.—Specifiesthemaximumvalueforthey-axisscale.

LoadData—Promptsyoutoselecta.lvmfilethatincludessignaldatayouwanttousetodefineasignal.SaveData—SavesthedatayouconfiguredinDataPointstoa.lvmfile.DefinedLimit—DisplaysthesignalyoudefineandareferencesignalifyouplaceacheckmarkintheShowinputsignalcheckbox.Showinputsignal—DisplaysareferencesignalintheDefinedLimitgraph.Showinterpolatedvalues—EnableslinearaveraginganddisplaystheinterpolatedvaluesontheDefinedUpperLimitor

DefinedLowerLimitgraph.Frequencyaxisislogarithmic—Setsthegraphfrequencyaxistologarithmicand,whentheLimitssourceisUserDefinedSignals,computesthelimitvaluesbetweenthedefinitionpointssotheresultingsegmentappearsasastraightlineinalogarithmicfrequencyrepresentation.Forexample,youcanusethistocreateasymptoticlimitsfittingfilterroll-offindecibelsperdecade.Thisoptionisonlyavailableiftheinputisafrequency-domainsignal.

NoteIftheinputisafrequency-domainsignal,placeacheckmarkintheFrequencyaxisislogarithmiccheckboxtodisplayyoursignalinalogarithmicfrequencyscaleandcreatealimitsignalconnectingthecornerpointssothattheyappearaslinesegmentsinalogarithmicrepresentation.Thisisusefulifyouwanttodefinelimitsthatfollowanasymptoticfrequencyroll-offrepresentedindecibel/decade.

Usethisdialogboxtodefinedatavaluesforalimittest.

EditSweepOutputDialogBoxLabVIEWSignalExpressSpecifiestheY-andX-axisparameterstoaccumulateduringthesweepoperation.Thisdialogboxincludesthefollowingcomponents:

Output(Y-Axis)—Liststhepossibleoutputstoaccumulateduringthesweepoperation.Input(X-Axis)—Liststhepossibleparameterstoaccumulateduringthesweepoperation.Advanced—Liststhesweepoutputsyoucanselecttorepresentthex-scaleofthesweepoperation.

DataPage(OptionsDialogBox)SelectTools»OptionstodisplaytheOptionsdialogboxandselectDatafromtheCategorylisttodisplaythispage.UsethispagetosetoptionsforexportingdatafromLabVIEWSignalExpress.Thispageincludesthefollowingcomponents:

ExportingData—Containsthefollowingoptionforexportingdata:

MaximumClipboardDataExportSize—Specifiesthemaximumnumberofsamplesyoucanplaceontheclipboardtoexport.IncreasethisvalueifyouwanttoexportaloggedsignaltoMicrosoftExcel.

BoundParametersListDialogBoxUsethisdialogboxtobindoperatorinterfacecontrolstostepparameters.SelectacontrolontheOperatorInterfacetab,clickthesmallarrowiconthatappearstodisplaytheTaskswindow,andclicktheEditBoundParametersLinktodisplaythisdialogbox.YoualsocanselectacontrolontheOperatorInterfacetab,displaythePropertieswindow,selecttheBoundParameterspropertythatappearsunderParameterBinding,andclickthebuttonthatappearsnexttothevalueofBoundParameterstodisplaythisdialogbox.Thisdialogboxincludesthefollowingcomponents:

Members—Liststhestepparametersthatcurrentlyareboundtothecontrol.UsetheupanddownarrowstochangetheorderofparametersintheMemberslist.Add—DisplaystheBoundParameterEditordialogbox,whichyoucanusetoaddparameterstotheMemberslist.Remove—RemovestheselectedparameterfromtheMemberslist.Properties—Listspropertiesofthecurrentlyselectedparameter.YoucaneditthepropertyvaluesdirectlyfromthePropertieslist.ThePropertieslistalsoincludesoptionsforscalingthevaluesofproperties.

CreateSnapshotDialogBoxSelectOperate»CreateSnapshotorpressCtrl-Shift-Ttodisplaythisdialogbox.Usethisdialogboxtoconfigureasnapshotofthecurrentvalue(s)ofasignalorsignalsinaproject.Afteryouconfigurethesnapshot,clicktheOKbuttontocreatethesnapshot.Thisdialogboxincludesthefollowingcomponents:

Signalstoinclude—Displaysallthesignalsintheprojectthatyoucanincludeinthesnapshot.Placeacheckmarkinthecheckboxnexttoasignaltoincludethatsignalinthesnapshot.SelectAll—SelectseverysignalintheSignalstoincludelist.SelectNone—DeselectsallsignalsintheSignalstoincludelist.Name—Specifiesanameforthesnapshot.TheNameyouspecifyappearsintheLoggedDatawindowwhenyoucreatethesnapshot.Description—Specifiesadescriptionofthesnapshot.ThedescriptionappearsinatipstripwhenyoumovethemouseoverthenameofthesnapshotintheLoggedDatawindow.

ManageWorkAreasDialogBoxSelectEdit»WorkAreas»ManageWorkAreastodisplaythisdialogbox.Usethisdialogboxtocreatenewworkareasoreditordeletecurrentworkareas.

WorkAreas—Liststhecurrentworkareas.Monitor/RecordandPlaybackarethetwodefaultworkareas.MoveUp—Movestheselecteditemupinthelist.MoveDown—Movestheselecteditemdowninthelist.WorkAreaInfo—ProvidesinformationfortheworkareaselectedintheWorkAreaslist.

Name—Specifiesthenamefortheselectedworkarea.Description—Specifiesadescriptionoftheworkarea.Enableplaybackoflogs—Specifiesthatyouwanttousetheworkareatoanalyzeloggeddataandprocessloggeddatausinganalysissteps.

New—AddsanewworkareatotheWorkAreaslist.Delete—DeletestheselectedworkareafromtheWorkAreaslist.

ErrorListWindowTheErrorListwindowdisplaysanyerrors,warnings,ormessagesinaproject.ClicktheErrorListbuttontodisplaytheErrorListwindow.TheProjectAnalyzeralsodisplaystheErrorListwindowifaprojectcontainsanyerrors,warnings,ormessages.SelectTools»AnalyzeProjecttoruntheProjectAnalyzer.

NoteIfaprojectdoesnotcontainanyerrors,warnings,ormessages,theErrorListbuttonisdisabledandyoucannotdisplaytheErrorListwindow.

Clickanerror,warning,ormessageinthetopsectionoftheErrorListwindowtodisplayadescriptionand,ifapplicable,asuggestedsolutionfortheerror,warning,ormessage.TheErrorListwindowincludesthefollowingcomponents:

Errors—DisplayserrorsintheErrorListwindow.Warnings—DisplayswarningsintheErrorListwindow.Messages—DisplaysmessagesintheErrorListwindow.ShowError—OpenstheConfigurationViewofthestepthatencounteredtheerror.

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