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Quick Reference Card

1I Programming Details �

Factory Default SettingsTo reset RX75 PLUS to its original factorysettings, press and hold the “CITY” and“VOL/MUTE” buttons while turning thepower on. The RX75 PLUS’s display willprovide a “Reset” message, accompaniedby an audible alert, acknowledging thereset.

Bel Pro Remote Quick Reference Card

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Congratulations and Important Warning

CongratulationsYour new Bel Pro Remote is the mostadvanced custom-installed radar/laserdetector available.

The Bel Pro Remote includes long-range X, K, and SuperWide Ka radar capability, improved Digital SignalProcessing for superior range and reducedfalse alarms, our patented Mute andAutoMute, audible and visual band alerts,and all the performance you’d expect fromBeltronics.

In addition, your new Bel Pro Remoteintroduces a new level of Radar/Laserdefense including:• Blistering radar performance, for superior

K, and Ka-band sensitivity• New programmable laser blockers for

maximum against laser guns• Advanced Programming lets you instantly

set up to 8 customized features• Exclusive AutoScan™ mode drastically

reduces false alarms, plus Highway and City settings

• Ultra-bright alphanumeric display uses 280 LEDs for crystal clear information

• Exclusive Threat Display™ tracks and displays multiple radar signals and signal strength

• Exclusive Tech Mode™ display provides numeric frequency for any radar signals

• Standard remote Mute button provides one-touch Mute, and volume adjustment

If you’ve used a radar detector before, areview of the Quick Reference Guide onpage 4, and the Programming informationon pages 10 and 11 will briefly explain thenew features.

If this is your first detector, please readthe manual in detail to get the most out ofyour new RX75 PLUS’s performance andfeatures.

Please drive safely.

IMPORTANT INSTALLATION WARNINGYour new RX75 PLUS must be installed by aprofessional. Car Audio specialists and manycar dealers can install the RX75 PLUS foryou.

Attempting to install the Bel ProRemote without expertise in automotiveelectronic installations can cause personalinjury during the installation, or can damageyour RX75 PLUS or your vehicle. If yourvehicle is damaged during installation, itssafety systems may be compromised, whichcould cause personal injury or propertydamage.

FCC Note:Modifications not expressly approved bythe manufacturer could void the user’s FCCgranted authority to operate the equipment.

An example of ProgrammingHere is how you would turn RX75 PLUS’sAutoMute feature off.

1 Enter the Program Mode by holding both the CITY and VOL/MUTE buttonsdown for 2 seconds. The RX75 PLUS willbeep twice and display Program.

2 Press and hold the REV button. The RX75 PLUS will scroll through thecategories, starting with Power-on indication (Pilot), then Power-onsequence (PwrOn), then Signal strengthmeter (Meter), and then AutoMute(aMute).

3 Release the REV button when the RX75PLUS shows the AutoMute item. Since thefactory setting is for AutoMute to be on,the RX75 PLUS will display aMute ON.

(If you accidentally don’t release theREV button in time, and the RX75 PLUSgoes to the next category, hold the REVbutton down again, and after the RX75PLUS scrolls through all categories, it willbegin again at the top of the list.)

4 Press the CHG button to change fromaMute ON to aMute OFF.

5 To complete the Programming, simplywait 8 seconds without pressing any button.The RX75 PLUS will display Complete,beep 4 times, and return to normal operation.

There are 8 user-selectable options so youcan customize your RX75 PLUS for yourown preferences.

The buttons labeled CITY andVOL/MUTE are also used to enter theProgram Mode, REVIEW your currentprogram settings, and to CHANGE anysettings as desired. The words PGM, REVand CHG are located on the front of thedisplay.

How to use Programming1 To enter Program Mode, press andhold both buttons down for 2 seconds.(The unit will beep twice, and will displaythe word “Program”).

2 Then press the REV button to REVIEWthe current settings. (You can either tapthe button to change from item to item, orhold the button to scroll through theitems).

3 Press the CHG button to change anysetting. (You can either tap the button tochange from setting to setting, or hold thebutton to scroll through all the options).

4 To leave Program Mode, simply wait8 seconds without pressing any button.(The unit will display Complete, beep 4times, and return to normal operation).

Table of Contents

Introduction I

• Congratulations I

• Important Warning I

• Quick Reference Guide 4

Controls and Features 5-8

• Power 5

• Power-On Indication 5

• AutoMute 5

• Volume/Mute 5

• Remote Mute Button 5

• Highway / AutoScan / City Switch 6

• Display Brightness 6

• Audible Alerts 6

• Signal Strength Meter 7

• Threat Display™ 7

• TechDisplay™ 8

• Laser Blockers™ 8

Programming 9-13

• How to use Programming 9

• Example of Programming 9

• Overview of Programming 10

• Details of Programming 11-13

Technical Details 14-19

• Interpreting Alerts 14-15

• How Radar Works 16

• How Laser Works 17

• How Safety Radar Works 18-19

Service 20-25

• Troubleshooting 20-21

• Service 22

• Warranty 22

• Specifications 25

32

Quick Reference Card

Bel Pro Remote Quick Reference Card

* Factory Default Settings** Available only with External Speaker

� Remove card along perforations �

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Press the REV buttonto go from one category

to the next

PILOT LIGHT

POWER-ON SEQUENCE

SIGNAL STRENGTH METER

AUTOMUTE

VOICE**

CITY MODE SENSITIVITY

BRIGHTNESS

BANDS

Pilot HWYPilot HPilot V

PwrOn STDPwrOn FST

Meter STDMeter THTMeter TEC

aMute ONaMute OFF

Voice OnVoice Off

City STDCity LoXCity NoX

Brt AUTOBrt MINBrt MEDBrt MAXBrt DARK

Bands ALLBands MOD

X ON or OFFK ON or OFFKa ON or OFFLSR ON or OFF or BLCKSWS ON or OFF

Press the CHANGE buttonto change your settingwithin a category

* Full word: Highway or Auto or City

Letter: H or A or C

Vehicle voltage

* Standard power-on sequence

Fast power-on sequence

* Standard signal strength meter

Threat Display™

TechDisplay™

* AMute On

AMute Off

* Voice on

Voice off

* Standard City mode sensitivity

Low X band sensitivity in City Mode

No X band sensitivity in City Mode

* Brightness adjusts automatically

Minimum brightness when turned on

Medium brightness when turned on

Maximum brightness when turned on

Dark Mode when RX75 PLUS turned on

* All bands enabled

One or more bands has been modified

Turn bands “ON” or “OFF” by

pressing the VOL/MUTE button

PowerPress the Power button to turn the RX75PLUS on. (We recommend wiring the RX75PLUS to a switched circuit so that it willturn on/off with your vehicles ignition).

Matrix DisplayThe RX75 PLUS’s display will show“Highway,” “AutoScan,” or “City” as its standard power-on indication. Page 5. Ifyou prefer, you can choose other power-onindications. Page 11.

During an alert, the display will indicatethe radar band, and a precise bar graph forthe signal strength. Page 7.

You can program the RX75 PLUS forThreat Display™, which displays multipleradar signals and relative signal strength foreach, or choose TechDisplay™ mode, whichprovides the actual numeric radarfrequency. Pages 7-8.

The display can also show Safety Radartext messages. Pages 18-19.

City ButtonSwitches sensitivity modes betweenHighway, AutoScan™, and City settings.In general, we recommend the AutoScan™

mode. Page 6.

ProgrammingThe RX75 PLUS is ready to go – just turn iton. But you can easily change 8 features foryour preferences. Press both buttons toenter the Program Mode, then easily Reviewor Change your settings. Pages 9-13.

VOL/MUTE ButtonBriefly press this button on the displaycontroller, or the standard Remote Mutebutton, to silence the audio for a specificalert. (The audio will alert you to the nextencounter.) Page 5.

AutoMuteThe RX75 PLUS’s patented AutoMutefeature automatically reduces the volumelevel of the audio alert. Page 5. If youprefer, you can turn AutoMute off. Page 9.

Quick Reference Guide

4 5

Power OnTo turn the RX75 PLUS on, simply press thePower button on the RX75 PLUS’s Display/Controller. When you turn the RX75 PLUSon, it goes through a sequence of alerts.

If you prefer, you may program yourRX75 PLUS for a shorter power-on sequence.See the Programming section for details.

Power-on indicationAfter RX75 PLUS’s start-up sequence iscomplete, the matrix display will show“Highway,” “AutoScan,” or “City” to showwhich sensitivity mode is selected.

If you prefer, you can select alternatepower-on displays. See the Programmingsection for details.

AutoMuteYour RX75 PLUS has our patentedAutoMute feature. After the RX75 PLUSalerts you to a radar encounter at yourselected volume level, it automaticallyreduces the volume to a lower level. Thiskeeps you informed without theannoyance of a continuous full-volume alert.

If you prefer, you can turn theAutoMute feature off. See the Programmingsection for details.

Volume/MuteThe VOL/MUTE Button, located on RX75PLUS’s front panel, or the installed RemoteMute button, allows you to adjust the audiolevel.

To change the volume level, simplypress either button and hold. An audibletone will be generated, and the display willprovide a bar graph for the volume level.When your preferred audio level is reached,simply release the button. Your RX75 PLUSstores this setting in memory, even whenthe power is turned off.

To mute the audio for a single specificsignal, briefly press the VOL/MUTE buttonon the display controller, or the installedRemote Mute Button during an alert. Afterthat radar encounter has passed, the volumelevel will automatically reset and the audiowill alert you to the next encounter.

Remote Mute Button/Laser Blocking OffWhen the Laser Blockers are turned on, (seeProgramming section) the Remote Mutebutton can be used to manually stop“blocking” once youhave correctedyour speed.Simply press theRemote Mutebutton twiceduring the “LaserBlocking” message, and the LaserBlocker’s will cease to transmit. TheLaser Blocker’s will cease to transmitfor one minute. Once this time hasexpired, the Laser Blocker’s will auto-matically reset, and return to their activestate. A reset message will be displayed toverify and acknowledge the reset.

Controls and Features

Highway / AutoScan / City SwitchThe “City” button selects the RX75 PLUS’ssensitivity. We recommend the “AutoScan”mode for most driving.

The RX75 PLUS’s exclusive AutoScanmode provides long-range warning, withminimum false alarms. In this mode, theRX75 PLUS’s internal computer continu-ously analyzes all incoming signals and intelligently adjusts the sensitivity – eliminating the majority of false alarms.

You can also select conventional“Highway” and “City” modes. When drivingin urban areas where annoying X-bandintrusion alarms and door openers arecommon, City Mode can be engaged tolower X-band sensitivity and reduce X-bandalerts. Full sensitivity is maintained on allother bands. You can customize the RX75PLUS’s City Mode sensitivity. See theProgramming section for details.

Display BrightnessThe RX75 PLUS’s display brightness is auto-matically adjusted to suit ambient lightconditions in your vehicle. (The light sensoris located inside the text display window)

If you prefer, you can program yourRX75 PLUS for a fixed brightness level(Maximum, Medium, Minimum, or Dark).See the Programming section for details.

Dark ModeIf you set the RX75 PLUS to its Dark Modeusing the Programming feature, the RX75PLUS changes to a very inconspicuouspower-on indication: a very dim “AD,”“HD,” or “CD.” (In this display, the A, H, orC indicates AutoScan, Highway, or City, andthe D indicates Dark.)

When the RX75 PLUS is in Dark Mode,the display will not show visual alerts whenit detects signals. Only the audible alert willtell you of detected signals. See theProgramming section for more details.

Audible AlertsFor Radar signals:The RX75 PLUS uses a Geiger-counter-likesound to indicate the signal strength andtype of radar signal being encountered.

When you encounter radar, a distinctaudible alert will sound and occur faster asthe signal gets stronger. This allows you tojudgethe distance from the signal source withouttaking your eyes from the road. Each bandhas a distinct tone for easy identification.

X-band = chirpingK-band = buzzingKa-band = double-chirp

For Laser signals:Since Laser signals are a possible threat

no matter how weak, the RX75 PLUS alertsyou to all laser signals with a full laser alert.

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Controls and Features Controls and Features

For Safety signals:If you have turned on the SWS detec-

tion in the RX75 PLUS’s programming, itwill alert you to these signals with a double-beep tone, and a corresponding textmessage. A complete listing of the textmessages is on page 19.

If you haven’t programmed your RX75PLUS to decode these safety signals (seepages 9, 13, 19), it will still detect them asK-band radar signals.

Signal Strength MeterThe RX75 PLUS’s matrix display consists of280 individual LED’s, to provide an intuitiveultra-bright display of signal strength andtext messages.

When the RX75 PLUS detects radar, itdisplays the band of the radar signal (X, K,or Ka), and a precise bar-graph of signalstrength.

Threat Display™

The RX75 PLUS’s exclusive Threat Display™

option is an advanced display for experi-enced detector users. Please use the RX75PLUS for a few weeks to get fully familiarwith its other features before using itsThreat Display™.

To use the Threat Display™ instead ofthe standard bar-graph signal strengthmeter, you must select Threat Display™ inRX75 PLUS’s Programming (see pages 9-13).

Threat Display™ simultaneously tracksmultiple radar signals and provides the rela-tive signal strength for each signal received.

Threat Display™ can help you spot achange in your normal driving environment;for example, a traffic radar unit being operated in an area where there arenormally other signals present.

The Threat Display™ is actually a miniature spectrum analyzer. It shows theradar band, and its relative signal strength.

KA9 K1 X5Above is the Threat Display™ if the

RX75 PLUS was detecting 1 strong Ka-band, 1 weak K-band, and a medium X- band signal.

As you can see, there are numericvalues for signal strength after each banddesignator. The higher the number, thestronger the signal.

Note: If you use Threat Display™, thebrief signal shown in the power-onsequence when you turn on your RX75PLUS will also be in Threat Display™: an “X”with descending numeric value.

A few more examples will help youbetter see how the Threat Display™ works.

K9 X2Here Threat Display™ shows 1 strong

K-band signal, and a weak X-band signal.

Controls and Features

KA1 X1Here Threat Display™ shows 1 weak

Ka-band signal, and a weak X-bandsignal.

XOn very weak signals, there will not

be a number at all. This shows a veryweak X-band signal.

Threat Display™ DetailsThe band designators (X, K, Ka) will

stay on the display for a few seconds afterthe signal has passed. This allows you to seewhat the unit detected, even on very briefsignals.

However, the numbers representingthe signal strength continuously change(several times a second) to give you acontinuous view of the signal strength of allradar signals present.

TechDisplayThe RX75 PLUS’s new TechDisplay optionis also designed for the advanced detectoruser. In this mode, the RX75 PLUS willdisplay the actual numeric radar frequencybeing received.

K 24.150Display shows a K-band signal at

24.150 GHz

Ka34.700Display shows a Ka-band signal at

34.700 GHz

X 10.525Display shows an X-band signal at

10.525 GHz

Note: Even long-time detector users willrequire a significant amount of time toget familiar with this new level ofinformation.

Laser BlockingYour Bel Pro Remote is equipped with integrated Laser Blocker’s, making it the ultimate defense against laser guns.

Under the “Laser” option in the Bandscategory, the Laser Blocker’s can beprogrammed to receive only, or “Block” anincoming laser signal.

During a laser alert, the display willshow “Front” “Lsr Blck” when a signal isreceived from the front, or “Rear” “Lsr Blck”when a signal is received from the rear. Thismessage will be accompanied by the normalLaser alert tone.

8 9

How to customize the RX75 PLUS with Programming

There are 8 user-selectable options so youcan customize your RX75 PLUS for yourown preferences. The buttons that arenormally used for CITY and VOL/MUTE areused to enter the Program Mode, toREVIEW your current program settings,and to CHANGE any settings as desired.Pages 11-13 explain each option in moredetail.

How to use ProgrammingTo enter Program Mode, press bothbuttons and hold for 2 seconds. RX75PLUS will beep twice and display“Program.” (Brightness is at maximumduring programming.)

Then press the REV button to REVIEWthe current settings. (You can either tapthe button to change from item to item, orhold the button to scroll through the items.)

Press the CHG button to CHANGE anysetting. (You can either tap the button tochange from setting to setting, or hold thebutton to scroll through all the options).

To leave the Program Mode, simply wait8 seconds without pressing any button.(The unit will display “Complete,” beep 4times, and return to normal operation.)

(To quickly return to all of the factorydefaults, press and hold the CITY andVOL/MUTE buttons while turning on theunit.)

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3

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An exampleHere’s how you would turn RX75 PLUS’sAutoMute feature off.

1 Enter the Program Mode by holdingboth buttons down for 2 seconds. RX75PLUS will beep twice and displayProgram.

2 Press and hold the REV button. The RX75 PLUS will scroll through thecategories, starting with Pilot LightPilot , then Power-on sequence PwrOn ,then Signal strength meter Meter , thenAutoMute aMute .

3 Release the REV button when the RX75PLUS shows the AutoMute item. Since thefactory setting is for AutoMute to be on,the RX75 PLUS will display aMute ON .

(If you accidentally don’t release theREV button in time, and RX75 PLUS goesto the next category, hold the REV buttondown again, and after RX75 PLUS scrollsthrough all categories, it will begin againat the top of the list.)

4 Press the CHANGE button to changefrom aMute ON to aMute OFF.

5 To complete the Programming, simplywait 8 seconds without pressing any button.The RX75 PLUS will display Complete ,beep 4 times, and return to normal operation.

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Overview of Programming Options

Press the REV buttonto go from one category

to the next

PILOT LIGHT(Power-on indication)

POWER-ON SEQUENCE

SIGNAL STRENGTH METER

AUTOMUTE

VOICE**

CITY MODE SENSITIVITY

BRIGHTNESS

BANDS

* RX75 PLUS’s Factory Default SettingsTo reset RX75 PLUS to its originalfactory settings, press and hold the“CITY” and “VOL/MUTE” buttonswhile turning the power on. TheRX75 PLUS’s display will provide a“Reset” message, accompanied byan audible alert, acknowledging thereset.

**Available only with External Speaker

Pilot HWYPilot HPilot V

PwrOn STDPwrOn FST

Meter STDMeter THTMeter TEC

aMute ONaMute OFF

Voice OnVoice Off

City STDCity LoXCity NoX

Brt AUTOBrt MINBrt MEDBrt MAXBrt DARK

Bands ALLBands MOD

X ON or OFFK ON or OFFKa ON or OFFLSR ON or OFF or BLCKSWS ON or OFF

Press the CHANGE buttonto change your settingwithin a category

*Full word: Highway or Auto or CityLetter: H or A or CVehicle voltage

*Standard power-on sequenceFast power-on sequence

*Standard signal strength meterThreat Display™

TechDisplay

*AutoMute onAutoMute off

*Voice onVoice off

*Standard City mode sensitivityLow X-band sensitivity in City ModeNo X-band sensitivity in City Mode

*Brightness adjusts automaticallyMinimum brightnessMedium brightnessMaximum brightnessDark Mode

*All bands enabledOne or more bands has been modified

Turn bands “ON” or “OFF” by holding down the VOL/MUTE button

Details of Programming Options

Pilot Light (Power-on indication)Note: When you are using the Dark mode,the display will only show HD, AD, or CD,(Highway-Dark, AutoScan-Dark, or City-Dark).

PilotHWY (Full description)In this setting, the RX75 PLUS will display“Highway,” “City,” or “AutoScan” as itspower-on indication. (factory default)

Pilot H (Letter) In this setting, the RX75 PLUS will display“H” for Highway, “C” for City, or “A” forAutoScan.

Pilot V (Vehicle voltage)In this setting, the RX75 PLUS will display“H” for Highway, “C” for City, and “A” forAuto, and the vehicle’s voltage. If thevehicle’s voltage drops below 10.5 volts, alow voltage warning will be displayed,followed by an audible alert. A high voltagewarning is also given when the vehicle’svoltage goes above 16.0 volts.

Power-on SequencePwrOnSTD (Standard) In this setting, each time you turn on theRX75 PLUS, it will display “BEL PRO,”“RX75,” “Laser,” “Ka-band,” “K-band,” “X-band,” followed by a brief X-band alert. Itthen confirms communications to all of itscomponents. If a communications erroroccurs, the appropriate error message willbe displayed. (see page 21 for error messages)

Note: If there is a problem with the frontlaser receiver or wiring after the initialstart-up sequence, the RX75 PLUS willbriefly display “LsrF ERR.” If there is aproblem with the rear laser receiver orwiring after the initial start-up sequence,the RX75 PLUS will briefly display “LsrR N/A.”

In both cases, the RX75 PLUS willcontinue to receive radar signals, but willnot receive laser signals. If there is aproblem with the front radar receiver orwiring after the initial start-up sequence,the RX75 PLUS will display “Front N/A,”and will then continue to display “Check,”“Receiver,” “Wiring.” The RX75 PLUS willnot operate in this condition. Pleasecontact your installer if this occurs.

PwrOnFST (Fast power-on) This setting shortens RX75 PLUS’s start upsequence to a single beep, eliminating thewords “BEL PRO,” “RX75,” “Laser,” “Ka-band,” “K-band,” “X-band,” from thestart-up sequence.

Details of Programming Options

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Signal Strength MeterMeterSTD (Standard meter) The meter displays the band, and bar graphshowing signal strength. (factory default)

MeterTHT (Threat Display™) The meter simultaneously tracks multipleradar signals and provides the relative signalstrength for each signal received.

MeterTEC (TechDisplay) The meter displays the actual numericfrequency of the radar signal being received.Note: See more details on page 8.

AutoMuteaMute ON (AutoMute on) In this setting, the RX75 PLUS’s audio alertswill initially be at the volume you set, butafter a few seconds, the RX75 PLUS willautomatically reduce the volume level, tokeep you informed, but not annoyed.(factory default)

aMuteOFF (AutoMute off) With AutoMute off, the RX75 PLUS’s audioalerts will remain at the volume you set forthe duration of the radar encounter.

Voice AlertsVoiceON (Voice announcements on) In this setting, all radar and laser alerts,including SWS messages, will be announcedin a digital voice, followed by the normaltone. (factory default)

VoiceOff (Voice announcements off) In this setting, the standard tones will beused.

City Mode SensitivityCity STD (Standard) In this setting, when you put the RX75PLUS in the City mode, X-band sensitivity issignificantly reduced, to minimize annoyance from X-band intrusion alarmsand motion sensors. (factory default)

City LoX (Low X-band sensitivity) In this setting, when you put the RX75PLUS in the City mode, X-band sensitivity isreduced more than the standard setting.This will reduce X-band alarms from othersources even further, but also significantlyreduces range to X-band traffic radar.

City NoX (No X-band sensitivity) In this setting, when you put the RX75PLUS in the City mode, the RX75 PLUS willnot respond to any X-band signals.WARNING: Only choose this setting ifyou are absolutely certain that thereare no X-band traffic radar unitswhere you drive.

Note: These settings only apply when theRX75 PLUS is operated in City mode. X-band sensitivity is not affected when usedin “Auto” or “Highway” modes.

BrightnessBrt AUTO (Auto) Display brightness automatically adjusted tosuit the ambient lighting in your vehicle.

Brt MIN (Minimum) Sets display to minimum brightness.

Brt MED (Medium) Sets display to medium brightness.

Brt MAX (Maximum) Sets display to maximum brightness.

Brt DARK (Dark) In this setting, the RX75 PLUS will onlydisplay a very dim HD, AD, or CD for thepower-on indication, and will not show anyvisual alerts when signals are detected.

BandsBandsALLIn this setting, all radar, laser, and SWSfrequencies are monitored. This is thefactory default setting, and it is highlyrecommended that you use your RX75PLUS in this mode.

BandsMODIn this setting, the RX75 PLUS will warn youwith an audible alert and a text message,that one or more bands have been turnedoff in programming (i.e. “SWS OFF”). Thiswarning is displayed during the start-upsequence (standard or fast).

WARNING: Do not disable a radar orlaser band unless you are certain it isnot used for speed measurement inyour area.

Details of Programming Options

Interpreting Alerts Interpreting Alerts

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Although the RX75 PLUS has a comprehensive warning system and thishandbook is as complete as we can make it,only experience will teach you what toexpect from your RX75 PLUS and how tointerpret what it “tells” you. The radar alertsyou receive are affected by the specific type

of radar being used, the type of transmission(continuous or instant-on) and the locationof the radar source.

The following examples will give youan introduction to understanding the RX75PLUS’s warning system for radar, laser andsafety alerts.

Explanation

You are approaching a continuous radarsource aimed in your direction.

An instant-on radar source is being usedahead of you and out of your view.

An instant-on radar source or laser source isbeing used nearby. This kind of alertrequires immediate attention!

Laser is being used in the area. Because laseris inherently difficult to detect, any laseralert may indicate a source very close by.

A moving patrol car with continuous radaris overtaking you from behind. Becausethese signals are reflected (reflections areincreased by large objects), they may or maynot eventually blend into a solid tone evenwhen the patrol car is directly behind you.

Explanation

You are approaching a radar unit concealedby a hill or an obstructed curve.

A patrol car is travelling in front of you witha radar source aimed forward. Becausesignals are sometimes reflected off of largeobjects and sometimes not, the alerts mayseem inconsistent.

A patrol car is approaching from the otherdirection, sampling traffic with instant-onradar. Such alerts should be taken seriously.

You are driving through an area populatedwith radar motion sensors (door openers,burglar alarms, etc.). Since these transmittersare usually contained inside buildings oraimed toward OR away from you, they aretypically not as strong or lasting as a realradar encounter.

CAUTION: Since the characteristics ofthese alerts may be similar to some ofthe preceding examples, over confidence in an unfamiliar area can bedangerous. Likewise, if an alert in acommonly traveled area is suddenlystronger or on a different band thanusual, speed radar may be set upnearby.

Alert

The RX75 PLUS begins to sound slowly,then the rate of alert increases until the alertbecomes a solid tone. The Signal Meterramps accordingly.

The RX75 PLUS emits short alerts for a fewseconds and then falls silent only to brieflyalert and fall silent again.

The RX75 PLUS suddenly sounds a contin-uous tone for the appropriate bandreceived. All segments in the Signal StrengthMeter are lit.

A brief laser alert.

The RX75 PLUS receives weak signals.These signals may be a little stronger as youpass large, roadside objects. The signalsincrease in frequency.

Alert

The RX75 PLUS alerts slowly for awhile andthen abruptly jumps to a strong alert.

The RX75 PLUS alerts intermittently. Rateand strength of alerts may be consistent orvary wildly.

The RX75 PLUS alerts intermittently. Rateand strength of signal increases with eachalert.

The RX75 PLUS gives an X-band alert intermittently.

How Radar Works How Laser Works

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How Radar WorksTraffic radar, which consists of microwaves,travels in straight lines and is easily reflectedby objects such as cars, trucks, evenguardrails and overpasses. Radar works bydirecting its microwave beam down theroad. As your vehicle travels into range, themicrowave beam bounces off your car, andthe radar antenna looks for the reflections.Using the Doppler Principle, the radarequipment then calculates your speed bycomparing the frequency of the reflectionof your car to the original frequency of thebeam sent out.

Traffic radar has limitations, the mostsignificant of these being that it typically canmonitor only one target at a time. If there ismore than one vehicle within range, it is upto the radar operator to decide which targetis producing the strongest reflection. Sincethe strength of the reflection is affected byboth the size of the vehicle and its proximity to the antenna, it is difficult forthe radar operator to determine if the signalis from a sports car nearby or a semi-truckseveral hundred feet away.

How Laser (Lidar) WorksLaser speed detection is actually LIDAR(Light Detection And Ranging). LIDAR gunsproject a beam of invisible infrared light.The signal is a series of very short infraredlight energy pulses which move in a straightline, reflecting off your car and returning tothe gun. LIDAR uses these light pulses tomeasure the distance to a vehicle. Speed isthen calculated by measuring how quicklythese pulses are reflected given the knownspeed of light.

LIDAR (or laser) is a newer technologyand is not as widespread as conventionalradar; therefore, you may not encounterlaser on a daily basis. And unlike radardetection, laser detection is not prone to“false” alarms. Because LIDAR transmits amuch narrower beam than does radar, it ismuch more accurate in its ability todistinguish between targets and is also moredifficult to detect. As a result, even thebriefest laser alert should be takenseriously.

There are limitations to LIDAR equipment. LIDAR is much more sensitiveto weather conditions than RADAR, and aLIDAR gun’s range will be decreased byanything affecting visibility such as rain, fog,or smoke. A LIDAR gun cannot operatethrough glass and it must be stationary inorder to get an accurate reading.

Because LIDAR must have a clear lineof sight and is subject to cosine error (aninaccuracy which increases as the anglebetween the gun and the vehicle increases)police typically use LIDAR equipmentparallel to the road or from an overpass.LIDAR can be used day or night.

Radar range also depends on the powerof the radar equipment itself. The strengthof the radar unit’s beam diminishes withdistance. The farther the radar has to travel,the less energy it has for speed detection.Because intrusion alarms and motionsensors often operate on the samefrequency as X-Band radar, your The RX75PLUS will occasionally receive non-policeradar signals. Since these X-Band transmitters are usually contained inside ofbuildings or aimed toward the ground, theywill generally produce much weaker readings than will a true radar encounter.As you become familiar with the sources ofthese pseudo alarms in your daily driving,they will serve as confirmation that yourThe RX75 PLUS’s radar detection abilitiesare fully operational.

How Safety Radar Works SWS Safety Radar Text Messages

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How Safety Warning Systems WorksSafety Warning Systems, or SWS, is amodified K-band radar signal used totransmit important driving related information.

From the factory, your RX75 PLUS isprogrammed with SWS turned ON. If SWS isnot used in your area, you can simply turnSWS reception OFF by using the RX75PLUS’s Programming feature.

The SWS system has 64 possiblemessages (60 allocated). The SWS messagesyour RX75 PLUS can decode and display arelisted on the facing page.

SWS Text Messages1 WorkZone2 Road Closed3 Bridge Closed4 WorkCrew Highway5 WorkCrew Utility6 Detour7 Truck Detour8 MustExit9 Rtlane Closed10 CntrLane Closed11 LeftLane Closed12 Future Use13 Police14 Train15 Low Overpass16 BridgeUp17 Bridge Wt Limit18 RockSlid Area19 School Zone20 Road Narrows21 Sharp Curve22 Croswalk23 Deer Crossing24 Blind or Deaf Kid25 SteepUse LowGear26 Accident27 PoorRoad Surface28 Loading ScholBus29 DontPass30 Dangrous Intrsect31 Emergncy Vehicle32 Future Use

33 HighWind34 Severe Weather35 HeavyFog36 Flooding37 BridgIce38 RoadIce39 Dust Blowing40 Sand Blowing41 Blinding Snow42 Future Use43 RestArea44 RestArea w/servic45 24hrFuel46 Insp Stn Open47 Insp Stn Closed48 Reduced Speed49 Speed Enforced50 HazMatls Exit51 Expect Delay52 10 Min Delay53 20 Min Delay54 30 Min Delay55 1 Hour Delay56 Traffic TunRadio57 Pay Toll58 Trucks ExitRght59 Trucks ExitLeft60 Future Use61 Emerg Veh Mvng62 Police Pursuit63 Oversize Vehicle64 SloMovng Vehicle

Note: Some of the safety messages havebeen condensed, so each message can bedisplayed on one or two screens on theRX75 PLUS’s eight character display.

Since Safety radar technology isrelatively new and the number of transmitters in operation is not yetwidespread, you will not receive Safetysignals on a daily basis and should not besurprised to encounter emergency vehicles,road hazards and railroad crossings that areunequipped with these transmitters and,therefore, fail to provide a signal. As Safetytransmitters become more prevalent (thenumber of operating transmitters is growingevery day), these Safety radar signals willbecome more common.

For more information and details aboutSWS safety radar, visit their web site atwww.swslc.com.

Troubleshooting Troubleshooting

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ProblemThe RX75 PLUS beeps briefly at thesame location every day, but noradar source is in sight.

The RX75 PLUS does not seemsensitive to radar or laser.

The RX75 PLUS did not alert when apolice car was in view.

The RX75 PLUS did not provide aSafety signal while within range ofan emergency vehicle.

The RX75 PLUS’s audible alerts areless loud after the first few alerts.

The RX75 PLUS’s power-onsequence reoccurs while you aredriving.

Your 14-year old son has changed all8 of the Programming options.

The RX75 PLUS will not turn on.

The RX75 PLUS’s Display feelswarm.

Solution• An X-band motion sensor or intrusion alarm is located withinrange of your route. With time, you will learn predictablepatterns of these signals.

• The RX75 PLUS may be in City Mode.• Radar band(s) are turned off in programming.

• VASCAR, (Visual Average Speed Computer And Recorder) astopwatch method of speed detection, may be in use. Officermay not have radar or laser unit turned on.

• Safety transmitters may not be commonly used in your area.

• The RX75 PLUS is in AutoMute Mode. See page 5 for details.

• A loose power connection can cause the RX75 PLUS to bebriefly disconnected, and will retrigger the power-onsequence.

• You can return all of the programming options to the factorydefaults by holding down the City and Mute buttons while youturn the RX75 PLUS on.

• Check that volume control is ON.• Check that vehicle ignition is ON.• Check all connections.

• It is normal for the RX75 PLUS to feel warm.

Explanation of Displays

LsrF ERR

LsrR N/A

CheckReceiverWiring

HDADCD

PilotHWY

WorkZone

X2 ,or K9 ,or KA7,etc.

Self Cal

Rcvr ERR

Blck OFF

Comm ERR

There is a problem with the front Laser Receiver. There could be an unpluggedconnection, damaged wiring, or a problem with the front Laser Receiver. After theRX75 PLUS alerts you to this, it will then resume operation with the front radarreceiver and rear laser only.

There is a problem with the rear Laser Receiver. It could be an unplugged connection, damaged wiring, or a problem within the rear Laser Receiver itself. Afterthe RX75 PLUS alerts you to this, it will then resume operation with the front radarand Laser Receiver only.

There is a problem with the front receiver. It could be an unplugged connection,damaged wiring, or a problem within the front receiver itself. The RX75 PLUS willcontinue to display this message, and will not operate until the problem has been repaired.

Sensitivity control is in Highway mode, display is in Dark Mode (page 13)Sensitivity control is in Auto mode, display is in Dark Mode (page 13)Sensitivity control is in City mode, display is in Dark Mode (page 13)

One of the many programming messages (pages 9-13)

One of the many Safety Radar messages (page 19)

The RX75 PLUS has been programmed in the Threat Display™ Mode (page 8)

The RX75 PLUS is running a self-calibration test.

The RX75 PLUS’s radar receiver has failed to calibrate. Contact your Dealer for repair.

Laser Blockers were manually shut off during a laser alert.

Serial communications between the interface and the display have beeninterrupted. Contact your dealer for repair.

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Service

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Service ProcedureIf your RX75 PLUS ever needs service,please follow these steps:

1 Check the troubleshooting section ofthis manual. It may have a solution to yourproblem.

2 Contact your installing dealer. Theywill evaluate your unit and arrange repairs ifnecessary.

PartsReplacement parts are available from yourinstalling dealer.

AccessoriesThe following accessories are availablethrough your local dealer:• 12-volt Amplified External Speaker.

BELTRONICS One Year Limited WarrantyBELTRONICS warrants your RX75 PLUSagainst all defects in materials and workmanship for a period of one (1) yearfrom the date of the original purchase,subject to the following terms and conditions:

The sole responsibility of BELTRONICSunder this Warranty is limited to eitherrepair or, at the option of BELTRONICS,replacement of the RX75 PLUS detector.There are no expressed or impliedwarranties, including those of fitness for aparticular purpose or merchantability,which extend beyond the face hereof.Some states do not allow limitations on howlong an implied warranty lasts, so the abovelimitations may not apply to you.

This warranty does not cover installation,removal or reinstallation charges.BELTRONICS is not liable for any incidentalor consequential damages arising from theuse, misuse, installation, or mounting of theRX75 PLUS. Some states do not allow theexclusion or limitation of incidental orconsequential damages, so the above limitation or exclusion may not apply to you.

This Warranty gives you specific rights.You may have other legal rights which varyfrom state to state. This Warranty does notapply if the serial number on the housing ofthe RX75 PLUS has been removed, or ifyour RX75 PLUS has been subjected tophysical abuse, improper installation, ormodification.

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Features and SpecificationsOperating Bands• X-band 10.525 GHz ± 25 MHz• K-band 24.150 GHz ± 100 MHz• Ka-band 34.700 GHz ± 1300 MHz• Laser 900nm, 33 MHz bandwidth

Radar Receiver / Detector Type• Superheterodyne, GaAs FET VCO• Scanning Frequency Discriminator• Digital Signal Processing (DSP)• 4-bit High-Resolution A-to-D Converter

Laser Detection• Quantum Limited Video Receiver • Multiple Laser Sensor Diodes (6F, 3R)

Display Type• Text/Matrix 280 AlGaAs LED• Bar Graph or Threat Display• Automatic Brightness Control

Power Requirement• 12VDC, Negative Ground

Programmable Features• Power-On Indication• Power-On Sequence• Signal Strength Meter• AutoMute• Voice Alerts• City Mode Sensitivity• Display Brightness• Bands

Sensitivity Control• AutoScan• Highway• City

Auto Calibration Circuity

Complete VG2 Immunity

Dimensions (Inches)• Display/Controller: 4.2 x 1.4 x .55• Radar Receiver: 3.75 x 3.15 x 1.75• Front Laser Receiver: 4.65 x 1.8 x 0.8 • Rear Laser Receiver: 6.0 x 1.0 x .65

Patented TechnologyThe RX75 PLUS is covered by one or moreof the following US patents. 6,400,305 6,249,218 6,069,580 5,600,1325,587,916 5,668,554 5,559,508 5,365,0555,347,120 5,446,923 5,402,087 5,305,0075,206,500 5,164,729 5,134,406 5,111,2075,079,553 5,049,885 5,049,884 4,961,0744,954,828 4,952,937 4,952,936 4,939,5214,896,855 4,887,753 4,862,175 4,750,2154,686,499 4,631,542 4,630,054 4,625,2104,613,989 4,604,529 4,583,057 4,581,7694,571,593 4,313,216 D314,178 D313,365D310,167 D308,837 D296,771 D288,418D253,752The RX75 PLUS is also covered by one ormore of the following Canadian patents:1,295,715 1,295,714 1,187,602 1,187,586Other patents pending.

Specifications

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45069-9789