AD-A257 891

High Capacity Voice Recorder(HCVR) Operational Test andEvaluation (OT&E) IntegrationTest Report

Wayne BellAndy ColonEdward Lind

October 1992

DOT/FAA/CT-TN92/30

Document Is on file at the Technical Center I C

Library, Atlantl•ci.ty International Airport, N.J. 08405 DT I IELECTENOVI 6 1992

% e EI•us. X1011x Of 11MnP~r!'"O

Tochn"i~ Center // -' . ,

Atlanti C it Ito,°. n Arpr,,o° N.J. 0840 9 2 -2 9 5 5 4 .-l,kSlllllnlllllpolllSl!! D(1/

NOTICE

This document is disseminated under the sponsorshipof the U.S. Department of Transportation in the interest ofinformation exchange. The United States Governmentassumes no liability for the contents or use thereof.

The United States Government does not endorseproducts or manufacturers. Trade or manufacturers'names appear herein solely because they are consideredessential to the objective of this report.

Technical Report Documentation Page

1. Report No. 2. Government Accession NO. 3. Recipient s Catalog No.

DOT/FAA/CT-TN92/304. Title and Subt,,'e 5. Report Date

October 1992

HIGH CAPACITY VOICE RECORDER (HCVR) OPERATIONAL 6. Performing Organization Code

TEST AND EVALUATION (OT&E) INTEGRATION TEST REPORT

8. Performing Organi zation Report No.

7. Author s)

Wayne Bell, Andy Colon, Edward Lind DOT/FAA/CT-TN92/30

9. Performing Organization Name and Address 10. Work Unit No. (TRAIS)

Federal Aviation AdministrationTechnical Center 11. Contract or Grant No.

Atlantic City International Airport, NJ 08405

13. Type of Report and PerAod Covereo

12. Sponsoring Agency Name *nd AddressU.S. Department oT TransportationFederal Aviation Administration Technical NoteAtlantic City International Airport, NJ 08405 14. Sponsoring Agency Code

15. Supplementary Notes

16. Abstract

This report describes the Operational Test and Evaluation (OT&E) Integration testsperformed by ACW-400A on the High Capacity Voice Recorder (HCVR) equipment. ThisCommercial Off-The-Shelf (COTS) equipment is being acquired to replace existing152-channel voice recorders currently in use at Air Route Traffic Control Centers(ARTCCs) and the New York Terminal Radar Approach Control (TRACON) Facility.

Tests to verify FAA-P-2878 (Purchase Description) requirements were performed atthe Federal Aviation Administration (FAA) Technical Center. Tests to verifyNAS-SS-I000, Volume I, System Level Requirements, and Volume IV, Subsystem LevelRequirements were performed at the Seattle ARTCC (the designated key test site).

This equipment did not meet all FAA-P-2878 or NAS-SS-1000 requirements, primarilybecause it is COTS equipment and was not specifically designed to meet FAArequirements. The advantages of this equipment, however, outweigh thedisadvantages, in the opinion of ACW-400A. The HCVR equipment is, therefore,recommended for deployment under the conditions cited in this report.

17. Key Words 18. Oistribution Statement

High Capacity Voice Recorder (HCVR) Document is on file at the TechnicalVoice recording Center Library, Atlantic City

Peak limiter International Airport, NJ 08405

19. Security Classf. (of this report) 20. Security Classif. (of this page) 21. NM . of Pages 22. Price

Unclassified Unclassified 43

Form DOT F 1700.7 (8-72) Reproduction of completed page outhorized

TABLE OF CONTENTS

Page

EXECUTIVE SUMMARY v

1. INTRODUCTION 1

1.1 Background 11.2 Purpose 11.3 Participants 11.4 Reference Documents 2

2. TEST APPROACH AND CONCEPT 2

3. TESTS AT FAA TECHNICAL CENTER 2

3.1 Unit Level Tests 23.2 Drop-out Tests 53.3 Audio Input Level Tests 6

4. OT&E INTEGRATION TESTS AT KEY SITE 8

4.1 System Level Requirements Verification Test 84.2 Subsystem Level Requirements Verification Test 8

5. CONCLUSIONS 11

5.1 Unit Level Test Conclusions 115.2 Drop-out Test Conclusions 115.3 Peak Limiter Test Conclusions 115.4 OT&E Integration Test Conclusions 11

6. RECOMMENDATIONS 12

7. ACRONYMS AND ABBREVIATIONS 12

APPENDIXES

A - FAA-P-2878 Verification Requirements and Final ReportTraceability Matrix

B - NAS-SS-1000 Volume I, System Level Requirements

C - NAS-SS-1000 Volume IV, Subsystem Level Requirements

D - Peak Limiter Test Results

iii

LIST OF ILLUSTRATIONS

Figure Page

1 Unit Level Test Configuration 3

2 Audio Input Level Test 7

3 Plot of Peak Limiter Output Data 9

Accesion For

NTIS CRA&IDTIC TABUnannounced EJJustification ----.--.-.----.............

Dist Special

..7 :'Tr'Z7CTi 4v

iv

EXECUTIVE SUMMARY

The Magnasync Specialist 60-Channel Recorder/Reproducer is being acquired for theHigh Capacity Voice Recorder (HCVR) Program as a Commercial-Off-The-Shelf (COTS)replacement for the existing 152-channel voice recorders currently used at AirRoute Traffic Control Centers (ARTCCs) and the New York Terminal Radar ApproachControl Facility (TRACON).

During testing at the Federal Aviation Administration (FAA) Technical Center and atthe key test site at the Seattle ARTCC, it was found that this equipment did notmeet all FAA-P-2878 (Purchase Description) requirements. The requirements whichfailed are all categorized as noncritical, based on the definition of "Critical" inNAS-SS-IO00, Volume I, Section 6, page 106; "Functions or services that, if lost,would prevent the NAS from exercising safe separation and control over aircraft."

It must be noted that this equipment is COTS equipment and was not specificallydesigned to meet all HCVR FAA-P-2878 requirements.

This procurement provides the following advantages:

1. Reduction in power consumption from 1.158 kilowatts (kW) to 991.5watts (w), for the 300-channel system at the Seattle ARTCC,

2. Increased recording capacity from 152 channels to 300 channels, forSeattle ARTCC,

3. Increased reliability and reduced maintenance due to solid statemodular design,

4. Head replacement period increased from 4 months for present recorders,to 3 years for Magnasync recorders,

5. Standard 10 1/2" tape reels as opposed to special reels for 152-channelrecorder, and,

6. Commercially available replacement parts as opposed to specially machinedparts for 152-channel recorder.

There are the following areas of concern;

1. This equipment cannot presently interface with a modified Inter-RangeInstrumentation Group version E (IRIG-E) coded time source at the Seattle site.

2. The equipment exceeds the Total Harmonic Distortion voltage (THDv)requirement of the critical alternating current (AC) power bus.

An Engineering Change Proposal (ECP) is one of the options being considered toresolve the coded time source problem and a NAS Change Proposal (NCP) is in processfor a waiver on the THDv requirement.

The advantages, in the opinion of ACW-400A, outweigh the disadvantages.

Deployment is recommended with the conditions noted in section 6 of this report.

v

1. INTRODUCTION.

This test report details the results of the High Capacity Voice Recorder (HCVR),Commercial Off-The-Shelf (COTS) equipment, Operational Test and Evaluation (OT&E)testing performed at the Federal Aviation Administration (FAA) Technical Center inApril and May 1992, and at Seattle Air Route Traffic Control Center (ARTCC) (ZSE),the key test site, in May and June 1992.

1.1 BACKGROUND.

The HCVR is a 60-channel recorder/reproducer COTS replacement for the existing152-channel voice recorders currently used at ARTCCs and the New York TerminalRadar Approach Control Facility (TRACON). Procurement of 60-channel recordingequipment to replace existing aging units will assist in the modernization ofARTCCs and the New York TRACON, thereby improving the overall performance of theNational Airspace System (NAS).

1.2 PURPOSE.

The HCVR is used for recording of all air-to-ground (a-g) and selected ground-to-ground (g-g) voice communications. The HCVR equipment will interface with existingcommunications systems to continuously record a-g and g-g voice communications andprovide for monitoring, automated retrieval, and high speed reproduction of anyrecorded voice communications. The HCVR equipment consists of a dual transportrecorder/reproducer system and a portable reproducer system.

1.3 PARTICIPANTS.

The OT&E Integration team for the HCVR equipment evaluation was composed ofpersonnel from the Communications Test Team (ACW-400) of the FAA Technical Centerfor the unit level tests and personnel from ACW-400A and the Seattle ARTCC for thekey site tests. The personnel involved are listed below.

1.3.1 FAA Technical Center.

NAME ORGANIZATIONWayne Bell ACW-400AEdward Lind ACW-400AAndy Colon ACW-400ABenjamin Gottlieb ACW-400ARich Morton ACW-400A

1.3.2 Seattle ARTCC

NAME ORGANIZATIONRachel Ayers ZSE-TSOBob Carter ZSE-NCOT.J. Conrad ZSE-RDCGary Weiler ZSE-RDC

1.4 REFERENCE DOCUMENTS,

a. FAA-STD-024A Preparation of Test and EvaluationDocumentation.

b. NAS-SS-1O00 NAS System Specification, Functional andPerformance Requirements for the NationalAirspace System.

c. FAA Order 1810.4B FAA Test and Evaluation Program.

d. HCVR-NAS System Performance Test Procedures.

e. HCVR-NAS System Integration Test Procedures.

f. FAA-P-2878 60 Channel Voice Recording and PlaybackEquipment Purchase Description

g. ANSI S3.2-1960 USA Standard Method for Measurement of(R1971) Monosyllabic Word Intelligibility

2. TEST APPROACH AND CONCEPT.

The test approach was to operationally evaluate and integrate the HCVR equipmentprovided by Magnasync/Moviola Corporation of Hollywood, CA, to operationallyevaluate and integrate the HCVR equipment into the NAS. This was accomplished byunit level tests at the FAA Technical Center and System Integration tests at theSeattle ARTCC. In order not to delay implementation of the HCVR project, thesetests were conducted with the following known problems:

a. Equipment cannot operate with a modified IRIG-E coded time source,

b. Equipment exceeds NAS-SS-1000, Volume VI, paragraph 3.2.1.5.4.1.2.3bTotal Harmonic Distortion voltage (THDv) requirement.

3. TESTS AT FAA TECHNICAL CENTER.

Three areas of tests were conducted at the FAA Technical Center; unit level tests,drop-out tests and audio input level tests. Each are discussed in the followingparagraphs.

3.1 UNIT LEVEL TESTS,

Unit level tests were performed on the Magnasync Specialist 60-ChannelRecorder/Reproducer, portable Reproducer and Degausser, to verify FAA-P-2878Requirements (appendix A); selected NAS-SS-1000 Volumes I, System LevelRequirements (appendix B); and selected NAS-SS-IO00, Volume IV, Subsystem LevelRequirements (appendix C). A block diagram of the test configuration of the unitlevel tests is provided in figure 1.

2

HP 3326A TEK TSI-8150 60 PAIRS OFTWO-CHANNEL 60 CHAN INPUT IMPEDANCESYNTHESIZER SIGNAL SWITCHING MATCHING PADS

GPIB BUS J t

HP HP 3586 B UNIT UNDER TESTSELECTIVE METER

VECTRA 60 CHANNELS

GPIB HCVR

PROCESSOR/ HP 3561ACONTROLLER DYNAMIC SIGNAL

ANALYZERVARIABLE

A.C INPUTTRANSFORMER

HP 3478AMULTIMETER

LECROY 9450ADIG OSCILLOSCOPE

FIGURE 1. UNIT LEVEL TEST CONFIGURATION

3

The test configuration shown in figure 1 was used to verify the followingFAA-P-2878 requirements:

3.3.14 Frequency Response3.3.15 Harmonic Distortion3.3.16 Signal-to-Noise3.3.17 Crosstalk3.3.18 Hum Distortion

Unit level tests were conducted on the following Magnasync Units:

a. Dual Transport Tape Recorder/Reproducer Unitb. Portable Tape Reproducer Unit, Dual Cassette Recorder/Reproducerc. Degausser Unit

The test configuration for each of these tests is provided in the HCVR-NAS SystemPerformance Test Procedures prepared by ACW-400A.

3.1.1 Unit Level Test Results,

The FAA-P-2878 for the HCVR lists 85 requirements; 67 of these were verified bythese tests; 14 requirements failed; and 4 could not be verified becausemanufacturer's data was not available. Appendix A lists these requirements andindicates the test status of each requirement.

There were three separate failures of a transformer on the record amplifier boardswhich was of a concern. This was considered a component failure and not a failureof a FAA-P-2878 requirement.

The FAA-P-2878 requirements which failed are listed below by categories:

Failed Requirements Failure

3.3.8 START TIME 0.9 SECONDS VS 0.5 SECONDS

3.3.10 TRANSPORT SENSORS ONLY END-OF-TAPE (EOT) SENSOR PROVIDED.MOTION SENSING IS OBTAINED FROM TACH CKTSYNCHRONIZED TO MOTOR DRIVE. THISPROVIDES EOT & TAPE BREAKAGE SENSING.TAPE TRANSPORT DOES NOT STOP AND CONTINUESTO REEL THE LOOSE END OF THE TAPE ONTOTHE FLOOR.

3.3.12 INPUT LEVELS MANUAL CHANGE OF JUMPERS REQUIRED

3.3.20 HEAD ASSEMBLY WARRANTY 3 YRS, RQMT 11.4 YRS

3.3.22 SWITCHING CIRCUITRY FAA-P-2878 REQUIRES NO TRANSFER OFRECORDING WITH PWR SUPPLY FAILURE.RECORDER TRANSFERRED RECORDING WITHPWR SUPPLY FAILURE (MODULE REMOVED).

3.3.23 MONITOR & ALARM TAPE BREAKAGE BETWEEN CAPSTAN ANDTAKE-UP REEL WILL NOT SOUND ALARM.

4

3.3.26.2 ACCESSIBILITY OVERLOAD PROTECTION DEVICES NOT ONFRONT PANEL

3.4.1 PORTABLE REPRODUCER PWR SUP & CONTROL PANEL NOT FULLYUNIT COMPATIBLE

3.4.1.1 DESIGN & CONSTRUCTION HEIGHT 8" OVER SPEC (34")

3.4.1.5 FOOT CONTROL PANEL AUTO-SEARCH NOT PROVIDED

3.4.1.7 TWO CHANNEL CASSETTE COULD NOT BE TESTED FOR IRIGRECORDER FUNCTION. ECP IN PROCESS TO MOD

MASTER SYNCHRONIZER TO CORRECTPROBLEM.

3.4.1.9 AUDIO TIME JACK (SAME COMMENT AS FOR 3.4.1.7)

3.4.2.10 STOP FUNCTION NO AUTO STOP AND EJECT (ONLY AUTOSTOP)

3.4.4.4 DEGAUSSER CYCLE DOES NOT MEET TIME AT LOW VOLTAGE

Note: Although these are specification requirements, this acquisitionwas a COTS buy, and all of these items were as provided by theContractor.

Manufacturer Data Not Available

3.3.5.1 TAPE-PHYSICAL PROP. DATA NOT AVAILABLE FROM MANUFACTURER.

3.3.26.5 SERVICE LIFE DATA NOT PROVIDED BY MANUFACTURER.

3.5 MAINTAINABILITY & DATA NOT AVAILABLE FROM MANUFACTURER.RELIABILITY

3.6 TEST TAPE NOT PROVIDED BY MANUFACTURER.

NAS-SS-IO00, Volume I, Section 6, page 106, defines Critical as "Functions orservices that, if lost, would prevent the NAS from exercising safe separation andcontrol over aircraft." Based on this definition, all of the failed requirementslisted above are considered non-critical and would not prevent a deploymentrecommendation of the HCVR equipment.

3.2 DROP-OUT TESTS.

During Shakedown testing by ASM-640, loss of signal for short periods of time werenoted (drop-outs). A drop-out was defined as a depression in the signal level fora period of time. This time was approximately 150 milliseconds (ms). Drop-outtests were conducted at the FAA Technical Center to verify test results obtained byASM-640. The test scenario involved recording a 2000-hertz (Hz) audible tone usingone of the recorder transports and reproducing it on the playback unit.

5

Additional tests were conducted using prerecorded tapes with ANSI standard wordlists and with air traffic control (ATC) expressions. Six different word listscontaining more than 300 words and 13 sentences spoken by different air trafficcontrollers were used for this test. Pauses were inserted to simulate drop-outs.These pauses varied in duration from 70 to 160 ms. The pause was randomly insertedon different syllables at the beginning, middle, and end of the word. Only one ortwo drop-outs were inserted in the sentences. Listeners were permitted to replaythe tape as many times as they wished to hear the word. After hearing the tapeswith drop-outs, the listeners were given tapes with the same word list, withoutdrop-outs. The test data was analyzed for duration of drop-out, location of drop-out within the word, and the type of syllable containing the drop-out.

It should be noted that these tests were performed in the ACW-400A laboratory andlimited by the availability of test equipment. In addition, the test tapes wereplayed back on the Technics Dual Cassette Recorder provided with the MagnasyncRecorder. This added another variable into the test.

3.2.1 Drop-out Test Results,

Tests performed on the Magnasync and Dictaphone tape recorders showed the Magnasyncto have 24 drop-outs during 240 minutesof recording and the Dictaphone to haveonly 11 drop-outs for the same recording period. The lower drop-outs in theDictaphone are attributed to having two capstans rather than one in the Magnasync.Detailed test results are available from ACW-400A.

Results from the prerecorded tape tests indicated an average of 10-20 percent ofall words on the tapes with drop-outs were misinterpreted. The controller'ssentences which contained one to two drop-outs per sentence were all interpretedcorrectly. A drop-out of greater than 100 ms at the beginning of the word had themost effect on the intelligibility of the word. This duration drop-out had less ofan effect on multisyllable words. Test data sheets are available from ACW-400A.

3.3 AUDIO INPUT LEVEL TESTS,

These tests were conducted because of the problem encountered during initialOT&E Integration tests at the Seattle ARTCC. The signal level for input fromair traffic controllers was measured at -37 decibels above I milliwatt (dBm)and audio input from the pilots at +5 dBm. The dynamic range of the recordersis 35 decibel (dB). This resulted in the tape recorder clipping the audio from thepilot since their input level was set above at -10 dBm. These tests were todetermine the effect of the peak limiter circuit on the Record Board. A blockdiagram of the test configuration is shown in figure 2. The test was conductedover the full dynamic operating range of the recorder (35 dB). The input signalto the Record Board was varied from -51.2 dBm to +3.81 dBm (the maximum output ofthe Hewlett Packard (HP) Signal Generator), at three calibrated tap settings;-10 decibels above 1 millivolt (dBv), 0 dBv and +10 dBv. The output was measuredat the Record Amplifier output, with and without the peak limiter circuit.

6

Calbrated Taps(Input Level Attenuator)

'• (dfv)kXX 600 Ohrms Cv

-3S dem to 0 d -m -60 to -4 dbrn

3326A WP Two ý -2 -

Chamvd NymtW0e> NetworkS50 o 60 • t --- ) -10 -

(50 Ot-•s outpuA) 50 to 600

I t

- "20 0-ý

1D _______

Record Board

Output of aCharwW on

Record BoardI

5.5 Vptp Max An Cw

PeakLkiiter

FIGURE 2. AUDIO INPUT LEVEL TEST

7

3.3.1 Audio Input Level Test Results.

A plot of the output data is provided in figure 3 and the measured data tabulatedin appendix D. Figure 3 clearly shows the point at which the peak limiter comesinto effect (at an output voltage of about 1.7 volts, far below the 5.5 voltsaturation level). The peak limiter comes into effect at an input level of -13.2dBm for the calibrated tap setting of -10 dBv and -3.19 dBm for the calibrated tapsetting of 0 dBv. The le'7el at which the peak limiter comes into effect for thecalibrated tap setting of +10 dBm could not be determined because of limitations inthe test equipment.

4. OT&E INTEGRATION TESTS AT KEY SITE.

Tests at the key site in Seattle had the following specific purposes:

a. Verify NAS-SS-1000, Volume I, System Level Requirements that could not beverified at the FAA Technical Center, and

b. Verify NAS-SS-1000, Volume IV Subsystem Level Requirements that could not

be verified at the FAA Technical Center.

4.1 SYSTEM LEVEL REQUIREMENTS VERIFICATION TEST.

The purpose of these tests was to verify those NAS-SS-1000, Volume I, System LevelRequirements applicable to the HCVR equipment. A total of 17 requirements arelisted in appendix B. Seven of these are considered nonapplicable (N/A) becausethey are lead-in paragraphs or they do not specifcally apply to the HCVR.

4.1.1 System Level Test Results.

Initial tests were mechanical alignment tests of the tape recorder/reproducer andlimited recording tests on selected channels. A source of input signals for allchannels was not available at the test site.

There was a failure of a transformer on the Record Board, but this was considered a

component failure and not the failure of a function.

All ten of the applicable system level requirements were successfully completed.

4.2 SUBSYSTEM LEVEL REQUIREMENTS VERIFICATION TEST.

The purpose of these tests was to verify those NAS-SS-1000, Volume IV, SubsystemLevel Requirements applicable to the HCVR equipment. A total of 56 requirementsare listed in appendix C. Fifteen of these are considered N/A because they arelead-in paragraphs or they do not specifically apply to the HCVR.

8

6L1-

6L[6-

Z'L I- I

Z~6L- A; -

3 -44

Z*z-JZ'~6Z - E-4

'MI 0

+ +

* 0 _ -4-

7,it-

Cý ski

(AW -nin -t ~ o p ,-

I * 19

4.2.1 SUBSYSTEM LEVEL TEST RESULTS.

Twenty-nine NAS-SS-1000, Volume IV, Subsystem Level Requirements were successfullyverified. Twelve requirements failed during testing at the Seattle ARTCC andare listed below:

Paragraph No. Requirement Description

3.2.1.2.5.1.3.2.b Media runs out - Tape breakage, after thecapstan, and record conditions will notactivate alarm.

3.2.1.2.5.1.3.2.c Media fails - Tape breakage, after thecapstan, and record conditions will notactivate alarm.

3.2.1.2.5.1.3.2.d Failure of the media remaining sensor -Certain tape breakage and recordconditions will not activate alarm.

3.2.1.2.5.1.3.2.e Any condition that actuates the shutdownsystem - Certain tape breakage andrecord conditions will not activate alarm.

3.2.1.2.5.1.3.2.f Failure of the record function in theoperating recorder - Certain tape breakageand record conditions will not activatealarm.

3.2.1.2.5.1.3.3.a Any of the conditions which cause mainto standby recorder switching exceptwhen the media on the operating recorderreaches the adjusted sensing point -Certain tape breakage and recordconditions will not activate alarm.

3.2.1.2.5.1.3.3.b Failure of any power supply module -Certain tape breakage and recordconditions will not activate alarm.

3.2.1.2.5.1.3.3.c Loss of time code signal recording -Contractor provides no alarm for lossof time code.

3.2.1.2.5.1.6 Erasing equipment - The erasingequipment shall provide for erasureof media - Degausser takes 64 seconds atlow AC voltage (105 volts).

3.2.1.2.5.2.2.1 Input levels - The record system shallrecord all audio signals from -35 dBm to0 dBm - Failure due to manual change ofjumpers to select levels.

10

3.2.1.2.5.2.2.4 Availability - The recording equipmentshall meet an availability of .999 - Datanot available from contractor.

3.2.1.2.5.2.5 Erasing equipment - The total erasuretime shall not exceed 50 seconds -

Degausser takes 64 seconds at low ACvoltage (105 volts).

5. CONCLUSIONS,

ACW-400A conclusions from the Federal Aviation Administration (FAA) TecnnicalCenter tests and key site tests are discussed in the following paragraphs.

5.1 UNIT LEVEL TEST CONCLUSIONS.

All of the failures obtained on the unit tests are considered noncritical. Inaddition, some of the failures were due to the contractor's equipment not meetingspecification requirements because of their equipment design. This was aCommercial Off-The-Shelf (COTS) acquisition. The equipment was not specificallydesigned to meet the FAA-P-2878 requirements.

5.2 DROP-OUT TEST CONCLUSIONS.

Drop-outs of 70 to 160 milliseconds (ms) will not have a significant impact ondetecting information recorded on tape.

5.3 PEAK LIMITER TEST CONCLUSIONS.

The sites will have to adjust the input levels to the recorder to preventsaturation of the signal, without a peak limiter.

The sites need not be concerned abo.ut the input level and leave them set at their

present levels, with a peak limiter.

5.4 OT&E INTEGRATION TEST CONCLUSIONS.

Test conclusions for the two areas of test comprising Operational Test andEvaluation (OT&E) Integration are discussed in the following paragraphs.

5.4.1 SYSTEM LEVEL TEST CONCLUSIONS.

One failure, noted during OT&E Integration, is the failure of a transformer on theRecord Board. This could cause a failure of the tone signal that would be difficultto detect unless each channel of the recorder was checked separately.

5.4.2 SUBSYSTEM LEVEL TEST CONCLUSIONS.

The subsystem level requirements which failed are considered noncritical and wouldnot prevent a recommendation to deploy the HCVR equipment. Some of the failuresare due to the equipment being COTS and the contractor did not provide some of thefeatures required by the FAA-P-2878.

11

6. RECOMMENDATIONS.

ACW-400A recommends deployment of the High Capacity Voice Recorder (HCVR) equipmentunder the following conditions:

a. All channels on the recorder be tested each time a tape is changed. Thiswill prevent the failure of the transformer on the Record Board causing anundetectable failure of the tone signal and ensure that all channels are operatingproperly.

b. Peak limiters be supplied on all Record Boards. This will provide greaterflexibility for operating with different signal levels. (Peak limiters arepresently installed on the 152-channel voice recorders).

c. The program office to provide an acceptable interface for the mastersynchronizer Coded Time Source (CTS) input.

d. ACW-400A recommends that the National Airspace System (NAS) ChangeProposal (NCP) to waive the NAS-SS-1000 Total Harmonic Distortion voltage (THDv)requirement be approved before deploymetlt.

7. ACRONYMS AND ABBREVIATIONS,

a-g air-to-groundAGC Automatic Gain ControlANSI American National Standard InstituteARTCC Air Route Traffic Control CenterATC Air Traffic ControlCOTS Commercial-Off-The-ShelfCTS Coded Time SourcedB decibeldBm decibels above 1 milliwattdBv decibels above 1 millivoltECP Engineering Change ProposalEOT End of TapeFAA Federal Aviation Administrationg-g ground-to-groundHCVR High Capacity Voice RecorderHP Hewlett PackardHz hertzIRIG Inter-Range Instrumentation Groupms millisecondsNAS National Airspace SystemNCP National Airspace System (NAS) Change ProposalOT&E Operational Test and EvaluationTHDv Total Harmonic Distortion voltageTRACON Terminal Radar Approach Controi FacilityVRTM Verification Requirements Traceability Matrix

12

APPENDIX A

FAA-P-2878 VERIFICATION REQUIREMENTS AND FINAL REPORT TRACEABILITY MATRIX

0. 00

P-4 ~ ~ ~ ~ ~ ~ ~ .aE4z U)U V ) ) U wE44n0 nE 14w -- 4EZW

E- 04 A4A 4 4m zA 4 049 0 4 4 "

CL4 E- C-4E4E4

E-4 zE

E-0 r 4 n 1 U ,c 7%r 4r 0z~ 2 - 0rE-4 UAd-r -4~x 9 -.

E-4 W rir4 H2Cw

3 ~ E- 0%, U,

z 04 Z 4Z~ : w = (

'-4~E- Ez4a -'C ~ 2 -40 Ln1-UnU0 >~ E-4 z Q<0

1- =0f~)- CJ20 Q Cz - 4 4 Q - 4F4~ Q cn zw 2On .)9- 0'-4 >-40-4C E-4-0 cw-4I cz a 4

1-4C1. W-~-'- E-4- z z . co1-4 0 0 1-

'- 4 0 1-4 0 w

E. 0 e4Q U0-

W 0n 0 C z& 004

P-4 E- H H 4 Call N

044v~. CwC E-4 Ci 0 D I w0__ _ _ _ __ _ _ _ W z 1-

ad -i n nc

0 044 (N

z-U' CA

0 :1-'

0- z

w 5 m' e'4 Ln 'o + r-

"" 0O O~ (NC0U4%A

- 04

F-41-4:DE

00

'-4 E~O :-4 E-~ I- H-4 I-4E~4454:: E-4 H 0 a

z3 2;ZwI

z 14:-4 0 H

0- - w zECz4 IE-4 1-- 0

E-a &-4~z r-4

4-4 ~ ~ ~ ~ ~ ~ - >4. ' 2 '4 ' ' I f ' 0

w - 0 w - w J~U> >4C- Q(n zuz o 2 (A Z- ý-4 En A4E 0 <z~

H~ ~ z0 Cn w U'.T 404 -

z- W-14 E_4 0-"4 <U' o'U0U -44E-4

w a-14 004U' z z o>44'w 1-42U Z 6 ow od

uU' > a0 > 0 c w

U) ~ ~ u 0Z

E4:

w 4-4 C14 E-4 1-4 (NC4(N

> z

A-2

M

F-4 V-4CN -

0

1-4 (n 41-4 91f VcflnU wU 1-4 fU)V U

z 444 4444 4- < --z 0

E-' 1-4 z

E-2 W 4 :

2 UE-4~

t--4~C- 0 F

E- W 141-4U E-4U4

0 1-4 0 W~

04z 0- in- M m 0 InC 4 4 C V

H U)~ z ~c 0

0 0 C

C-' 0

E- 0 0.4 u~ wI-'f E4: -44 ).-I2 Z

cz 1-4b- U4 CA C w

0- 0 z -U odfl-

E- ~ i-I'E~4 0 ~ 9wU w

4 E-4(n Z0 cii-W

0~ 0 - liii4

E- c ER z 0 9Cd 0 -C " 04

Q "ce 1-4 w w P4 wa ~~~ E-2 W OD-

Z Z E-43 4V ~

rz

P414:

U, -4 Enu, 1-4 U)U V) ~ ,U V)V)cnW n-4u c 1- 4C-4

~04 WzP W04 AA A4Ad" 2 04404 4A4 0A4

cn 04 0-

E- 1-Ow 4 unCr-. co a,0'O';ONa* r-i e%1c en 04

E-4 u)04 .21-4~ 0 04~4 0400- 1 1 ciC4C ~ E-4 0

2 d . 4 -4 zr4 044 r- 4r -4r 4 r-4 Z cCI404C'l(N E-4x

E-4 -4

0:::: .- J z~

_______ 4:4-4 (w en

4 IQ 0-4 -xU9" = >1 E-4 0 4

oL E- - a n z u 4 -1- -4 2 US-

P~ ~ U, "004..

U,4 w- ZU 1- E-42 E- (A 2d 0P- 0 E-

104 E-4 I-020

a-n cn ) wzP-4 E4 404 F-4 z 4U4~

cI IZC.Cn 1 4: P-I/ 4:04-4&4 P4 c Ci-4czl.Jz CAE4a 0- g l a

0 (n 0U) c 93W-9i4 aCzci <: Cxl Z3)4

4-L4 4 0 CZl.O ,.O- cn 0 en 4En0-4 0wl44 w H-o I a r0Cui<

'-4 CzI 0 w4:Ca W-F4Clu 14 W 1-4'

C1040 Z40Z0--4-W__ _ ____4__;_ p w -. 0 20 0 F-4p

00-4 W - - - - 0 E-4 o

z~x I Wr- 1-4 0 0 w <lic -(-u n"3 9 4 40 H c~E-4 M4

(N(Nc'.E-4 (NC (N NC ,-,-i- - U)4

Go,

Go~~~ CL 0x 11

A-44

wf 1-4 C14e

0

1-'cn .3 lV . )V cn cn c c cn c~(ln cn goEn o-4 En " v Cfl 91 l~/ fl9U f Env n ni

E -4 4 44 4 < - -C-C 4 < 4-C.

E-4

0 0

l-4Z~I 1-'

w 2

E2 0

0 V- - - -4- 4- 4 4r4 r4r- 44 4 0 H C4-4 s-i -1- l-4CC4f* 1; ý 1 ý ý 1 1

E 41-4

'00z~0J

0~ in(4~

a 00 N3414

-z I

H 00'-

2ý0

002 0 u--~z0 Zz E- 04U f~4 4 U

96 w- zU 0 00~ :~~~~aJ~~~~ (3-4 '-4 w-~-~~-4 0 0(

cd c cai 00 01J0-3 2I4~~33 .

cn w z 0 cn 0 ad 04: E3~'Z 4(04 0n C d0z Icn ad

ad -C -C"_u_____ 0 <

j - 0u 0-

H~~~~~ z 6 t n0 0 z 0 E-4" -4

wco-. or-coaý 4:

0 :) L. E"ýA0-S

w C4 e

p 0-z

I- E 4 4

c) Ada za 4 04~~4~ ~4a4 44 -4wi 2 E-4 1-4 -

-40 0 02 2

E-4 Q P4 C1

w- 4 4 4 n1n%0c

(.40 F-4(N04 0 'I~ It. (~ 4u O -4-*

(.4 f2 2~-4 -.-4.-.-4 -4 4-v - I 01-4 14

2 '~~~6- F- 4 4 4 i Ui1ni

>~ "

z 0 a a &43

I-4 -42 4-0 >-0-

00 L)

1- -w 4

0) zU)Cc4 z F-4 -4

(-4 U)20(4-4 P)2 -4 0 A d

(-4 2 u -4 14 0- co 4w Z) zF nP -4 0-4~

U)~~C 0-2 no~ii . ~ZCi< Z(-

0 0 -U)- Cd '-4 1-4 ad E-4i 042 04-4 cn -4 ") IU ::4U)~ )

940 CIU E-4(- E-0

U)(.4Ads-4- w 0 w4 4 0 w F-

04~~~~i w m-4 w ( 1- E4

zN 9 04 N A L)

cn -4 E-4a d 4 E-4 C A

444 4 44 4 ~ 0 -4 Ciii

o . " F-4

rý =-z

APPENDIX B

NAS-SS-1000 VOLUME I, SYSTEM LEVEL REQUIREMENTS

A4 A4i Ad A4O 4 404 adadc 04 4 04

43 ::) -Z N ad in0 a a a 0

-4 C" en C

z 2d

E-4

2 Z

0

.a0rA E-42

N. >N

2 141

0~- ca 2, d w4

w'2 "4J w .0 .4 0t 1c l

1-4 0 . z4 4 )-4 0U baJ 0 a14 .,-01 Jj w v j'4-4 r.4 r.2 a rfA 4a 2d-4 v"4E r. 4J E4 "4 4 %a0 000 c E-4

W X -4.-4 0 4) E 4) (a > O 4)1 1094 4g)4(4.d M .01 0 V "4 cc2 co4 V

1.4 w 4) 41 ri0 .04.O41' ww >1 a ~41 0cn 44 01 W *U4 00~ >% a l 2..-,

042. 010. 1 m .V ~0 *U cc 041 0 rc

-1 " U 44 (a~ cm AJU f J -4

0 w 4 0 0 bo4 02 cc-4

o 0- M4 4)4 a-$0 14) 4 a 0Iu a-4a co ýt a -4 "040. U-

cd 0r-4 4J0 14 W C 0 -4 4 ca -4 MOco 4 0 ca u -40 "4 o 4 0~ a. W > u U E

0 U n 0 4.C4 1 4)14 MC 4 U

01

0 C. z

r4 4

-CO0 w C~4 (ICI C*' N

B-1

o

S E-4J

U)204 w 04CN4

z 04 in_ _ _ _ _ _ _ 2

P-4 ad *n -.

z -zU33

E-4-wE-3

0 21..,E-4-4

292~04

1.4

2 4 0 -

-1-4 1~

CzW3

o o 0441 ýr.- -1. c 1

ý4 W 3t b 4) -4 0 1-4

Z4.- 44C' 4 4C

o r.-4 ).@OoG w~ to 02L4 d .C0-4 @20.J 0) 4j0U cc w0 r4 0

04 0) 0. ca l v 0. 0.J ,4. -4 iAd-o4 4 10 -4 4d .. C m. r62 "l cca cc 4 .0-

4)a 1 60 z -4).9 4 0 Cz P% C .0 4 r..4u Q.. 0 13 .9 c *u4:l 0 W to0 3 44 .ca0 -0 w0 0 010 )

>2..0- -C 0 . 0.J owo I~~~ 0a 4.4 J - ~ 0 ~ . 2 01 "4 EnS @ N 0 -4 0 E4 2 -4 ~44 0 4

41 4 .0O Z 0JI.4 0rJ -4'0w l w r , 10 4 -42 ).4dl *--..4 >,c 0ccj 4 * .a CA 41 j. 41 40 $~41 .4

____t_-. t ZIcc (1 4) 0 0.o.CL.0 (D@ ~ u . 4) in

w4 -. )w ccc w W cac )

-4 Cn C .W1 o

*d > 0 or

cc-4 - -.4 14 4)0 1

020

4.,1

C14 cB-2

4)

1:4 Ad 44 4d 06 104 's 0 z N@

N,~ w -4enk

Z04~ .- 4N*~~-~~be en'O

E'-

z cn

z E--44 C44 4

I-''c C&. _ __ _

23 0

400

6)1 4d 44 4 E 4) at- 4 2 to 2

0 41r4 tS V 4)c -

0.4~~~~ 0 04 u0 1 4

0 04 U40wt

a~~ 0 m *c d m ý 0 - Q C.,I w 0 4 4 4 " .4 & -4 c

V, 4, %o 0 "- LV $ ! c p4

U6 V41 0 w 1 CI l 4 a(

u4)' 4.4 0U . U4 u t w'U 4 d

2y w0 4) c (d C 1 41 01bO w 00 w.1 .4 cc~4 r, 10 H- aad 010 .0 4-J.U U 0 CC'0 0.4I-' 'U 14 U ' CO U CO. 241- -

0- ") ") "4~ 41 cn to 0

01 0 4) 44.11 Cd4 14 W 4 0 co J4 14

C) 4 .4141 -4 0.14 C-4

C-1-0 1. 40 -4 ~It . 0 '

0(A 04 C- 4 014 .1 Cý C-4

-40 C42. Uý 'U4 'U4.1 C

*~~~4.1~ 001. 0 U 4~0

~ 0 1~0 1401 00 14 0-B-3'

0 -

IN.)ad)

z04 Q 0-

1- 0 04u zw .. .

0

1-4 -

001-4 CA

0 2 4*0C0 0 )0 I

004)-0

0 04 1

b5 0 14U4-

Od v -0 0

a r. -4 C44@ 4 U2 ) 0 2C .-~ 41 - JJCJ~ 0

Cfl r U * -.4 r.

0

14 -0~ C40 .

0~ *0. U'0.- 0' B-4

APPENDIX C

NAS-SS-1000 VOLUME IV, SUBSYSTEM LEVEL REQUIREMENTS

0 -

z __ _ _ _

z 044

4: 4: 4:11-4 ad Z 1

~zrz

-4 -4

in*

I3~0-4

z -0 0-

0-4-

04 1-0

oo z4)4 v4: c"

>: W )U0 r.44 E4ugo1- 4: 04 4: 4w ) c~z.z =. w uN. a. Air

rz 4 0 4$ -a44C a E4 8 4-_ _ -4_ _ __4 " oX . 1-4

0d 3104 a 0 t 4. 1 ýL)I- a S$ 4 t~ 3r

cn1- 4) -M co0- nV u 4 : 4 1 u110 "4 -4> 4 fd 0Uý4 Z0-

z z u .1 > -)w 4 0 h 4 4

tr' 4) >4 "4: 4 i r-4)W W4 4J--Z4

0* -40 v ~ -100)0

bob .-4> c 40 r. to 0 C U "4 W -124

ZY . . O-.44000 0.- 0. -4J* -4w00)0 1 O0 .4),4 W .0 0.I-1, -r 00C 0 v

4- *4 W -4. 4. E 0 W W J $4l44 WJ 04a. 0 4-4 OW 0. 0)0 0 0 >-

0. 4 04. -r C: Wr 0 4C>," ) $w A* SW 2. 0 uw4-4 mO~ rA4 d LV

1V~ J4JbS.I JJW WJJJ ~.J 0-

1- 044 0W .Cýb Wý 0ý CW

0 W.- C-4 0ý Cý 0.14 0ZIa-4J4 >~ W.W

00.-4~ s- ~ WO O ~>

4.4 Oa.~0.40 ~ l~bC ~ -4W-1

z- .

04 9z 2 21

1-4 ad4 LM-4 .4

U3 u ~ 4 4 4z t '4- 4 -

0~- z n $2.Z~04 ___

z*U, 04

2 -~ -o I-

P-4

24 24 0

2 ) 0

0 210Aj >

4-41-E-4

0

04 u 0&4-

0 S4 4 -44 4 0 "

w > IV4 c o10 c o -ad r -0 0 -A0 "4u t4r

4 , S . 4 4) 0 41 w w

to * 4 0 a V 4 8 1 cc 0

010ý4 ~ ~ * '4- -44NE-

04 U 4 0 4

P-4 1-4

-0 C234 0ý C ý ý C> - 0

04 01U' ~ W1c-2

c34c

o P-4

% __

rnri

0 0 o

E-40.

P-43

u~1.z 04-

o P-4-~r m ' 44

w. -.4 0c 4)r

u2 D9 4$ t r 1-4

ca4 1.4 _ _ W__ _

92 > I9> 04)

N. m. 0 .41 r'o' z) 2 4) 0: ?Aur2.4

o L 0 r0> jU j

* 4 aa Sl -4

cc us 41 .a .1 0 to w-)

049.

o a wi9.b C44 24 0

C-34

~4. 44)U

2~ CN 4 04 C' -4N

1-44

04

40 4

>

c 0 "P--4 f"

1-_ _ __ _ __ _ z

0 41o- 0.

z2 ý0 -44

(_4 cz* 2t)

C4 C', C-4 N I 0V;n c* I - .

~1 0bo 1.4 I-

0 'U 8vI w-14 1-4 V81 bko 0

U) U. 4) W 0 z

41 w w UC 4 r.8

mU C1.) ci *U8z1r14) u 1--4 'U 081 X U cc 0

W3 41 '"V U 4 ).4 r.3tw 1 boI.) 41 ~ 8 0V018 5=4j c (z t

Ic ( w b 4 '4 *44~1 " 4J.

0 8 46.4 to -4.. -4JJ0, 048 1 U) 81- co 0 u8 go 41 x 0

44 4 W 0 .ul ~ 4) rO J 0 1).C0J' -M' uJJ(' 00.rc - o9.

'o 10 1 0 0)081 4 a U 0 cc 'w . 4.4 4) c v 81 -4 bo M~ ) ~ f

WY wU $U 00 =~ wZ 3-48 08 U..4 5

V 10 -4 r. 1 'Uo 1 z U -- 'aUt81 1 4 ) r_ ca r.~ -40 0031 0'U 0 81 41

- -i c 0 w 0

.0 0V 8 4.4 toCý Cý n rý -

. 4 1-4 z4 - 4 4-~nJ a. . .* * *. 0W0 NN N N

C-4

z c

w 9101

0 0 ~ 0z0 2 _4C4 I# _" _4 ý4 14ý

Ca. U2w.0.4 -4 1- L L

Cz.. Cd

=c~ -4 -4. 44 I 4 I

F'-4

>- E- _ _ - _ _ _ _

(A "

-4 C.)

U3 (n ( I-V-4 14 C 4C 4 4V : -

4:0 -4 02 -4

-z 0 0V 0 W 004)~ 001r.ý

21 ý. 4~4

z 4z

0) . cc 0 X .L .- 4 U9:, rd4 (( wf -444.4 4 c

04 c ,4 m r-

b0c r( 41 0A 4-0 =1 " )4 r cE4 *M 0.4 V- (0 0 ~ c4:

C0 1 4. b.-4 0)z*02 14.4 0 0ý41 - C13 -4 J "4 Z 4 )o 41 W-4 -42 1 )w

U 01 (aCL-1- 40 t0 0n 010c. "- = 0 t 0 0 0 w 1-4 0

0e 4) 0.4 to~ *Ua 1m ca- 44 r'- r- 0 -4 44 J4-4 r(1C

C 4 4. -4 0 bot .4c 01(a r- 40 wJ ibJ91.. .. .o ed C:a 401 C 1 "4J, c

0. (4 " -414 1- '0 0. V, -40 coc d0w V4 0 r. '0. a ~ co11i cIa j - )z w w rAi 04 0 A 1: "40 w "0

ul 0 01 r. .4 c w -41 U1 . 0.0 04.4 to 4 b 0 ' 0 uu cc.i r -0 l c d4Uý0 0 1 3 0 0 1 " ) - - - .0 .. 4) 1. 0

w 31 ad4 (n .0 u a* in w 01 W m m

~~~~~~U -4- 14 14U.l01 . OV-4 14 4 rJ LmJ z.0 00 cc00.~

z w9

*0 010m&n UC4 In CU InC ý ý C

-4 C

UI w C1 C- -4 t r -

en en el4 -4 -4C4 C-4 -4 -4 U3 .'

C-5

o - -1 .

rA 43*% 0 L. -. . 44

04 _ _ _ -

z 04

b-44

z z

-44

14 0 CAo i to v.-4 QI)u>

z: 0 w )toc2c 40 41 wf

ad4 1 ) )4 -44 t4 04:a ul 4 : ý> ) 0. 0) CL 41- 2) w L E

0d w4 tr. 0.- -' u44Ez4-4 4) 4 ýfl 0 10 w w D 0 1tZ

(fl00QIL-.0 . w 0 .4 Cto t5 -4 4-4 0 )r4-40 U " -

0 4.t- *j -. 0 l0-l4 4 5) 04r 1 .(7 44 '0 44 S4 -0 4-4 cc M

r . cc -)4 a0 4 ) 9 4 h a4 d E-4tho ~ ~ ~ ~ ~ ~ ~ U 4:4 4 4r

w1 w0 a u 4 . Z C:z 0 c

o a4M t 1$ 00 0.~ 4 412 w U. bo r. 41 0 -

to00 w )4 c 4-1 0c CACM) r. 4.0w ObOJu 5-4 w04 fr0 w '41 4) C 4-1 4) C~ W~U "40-D4 4

w Q0 .. 4j~ CLCI1. u dwE. 33 u U1.* ) adw0 ) u

1-4 ~ ~ ~ ~ ~ ~ ~ ~ ~ - --4- U1U .14~I G ~ 1. WO S L

V) 3.-4 .0 CU 0..O OLU.4 .4

41-4C OCi 541 1441 1.1 0)z P.4 Uo4--. CA44. i I O U4J

44 04.10 ~ 1.1 1-4 ~ 1. 41 4.4 .0.0 ~ 1- U3000)01~ ~~~~~ LUU11 U-4 0O 2 400 u -~ b~~i U.0.~ .4.) -. 4 *0 2 Ca CI

~U.. 1~14U 10 U -i ~ .2.4 41 411C-64 a

C-4-4o -~ N -

'.0 i

04U -4- 4 I-

w = .-4 %a- P-.- c,z a. ______

>1z .-C'-

4: -

U3 w

2 ~a..

o 0

N.c

00

w 0 -4':J Cu

02 z

1- 1- C

0-4

E ~ -4 Cu

0 0 g 4 .4=.4 ~ 144 f 0

w U) 0 0e -4 4 4 40 -4ad0o '-0~ 1 G)L 4J ý4 $.40 02W4 imri- 0 -44 0 0.ca 04 ti L -

U- 1-im w.- - - w) C- 0 41 m)-0V3. 0 2-. C%4~. 4

141dU X W0

13 U)- Q Ca U) m) m

(12 0 O.0 w ) ) - 44J 0 00 (12Uccu~ v L o b 0 41 f))' a) . -4U0 2 m a 4

Noc 0.C WO W-G)-a. Q4 C -4U) 4)) -44o G)Cu OUG0C U r. C 0 O '-40 *U. cau~ 0

C2)! 0 Cu U4 Q'G)U = >4) E 4) C0u a u -4 U4 .4 0 to.- U) Cu2

r--44.14 w e.mr W" aC w w 400 v4J 0J0 z > 1 -4 M 4 0d 0 0z> 1 )r

0) wJ4 U 0 00 -4ca- > W >% I) 0 ww 1 4 r JJ4 .4) cc. .d ul . riw44 aeu r-.u~~~~~n~i r.0)~ W4l.t 0 - G U O

0 ~CCM N C.,~ fl

o l to r. ~ NN2~

(12 U

4: W N C N C~JNN l

C-7

0 -42 _ _ cn

Ca. rn

0 u Ln LA in 4n %nLA ad %n tA 'r

404 _ _ _

Laa

9--

1. 41

I- Q42 0

od 2-4.

40 C6gn z

r. o o c 4

z 0 -4)- u-4 4) 4 W- m c20J -4A( n 4

cc 04c i t 00. 44 k(12dedL : 0)4 Lu11- 0 4j r n0 2j02 o r4

0- 4,0 0J r 00I

c ~ ~ ~ to 0A ) .M4 1 4 0. us4 cl 0 O- C co 0 >LA4 c >

S 4j -4 0 0 ~ .r- -4.- 0j-4-4 U 41 w .0 r4 co 0 thoJJ A44.

gg 0-. 0 A,-4140 0 v 0 1 r. 0 0 -a ii. WJ to in- c C .4 *-4Uc CL ww 0 - 13JJ th 0 101 @1 m ulc 4J

Cal -414 a 5 0 0 5 .4 =- 66 z 2

"0"0U. zu 00 0l u0 u -41 Vu 0

-4 c

4C.~&4JI 4 * ~ U b C%4 J 0 z a

0>0

04 C14 l

z > Cd

C-84

WC00

4w4

14 L

>0E4 2 4u a.Lad tnk ;L

=n~ " ~'.z - - .4.4-

~-0 .

UU

10

o 0 0

2 vi

C" e-

-.- 4

V- 4,)a c

4)4) .C > 4 C 0 'zC' 4) 41. 0) w 1e () u4

0~ LW. 00 o$44c11 41'V- X 4)9 o Cx2

ffi '4 0) to go cc4. 0dc 0"

a. ".C 000 r. 0 X""EW 41.1 cO cc ta-44 .o m -4..

r. SC: .0c x f r 0 a~ CO.- 4)C:

Ca 34i 410 U. > a0 I-40 " 15In M CLW m go u .- 4 414.41 ) 4 i 0-*4 -44 C.CZ 4)4 0) M(A4 41 C: z ~4)> toV- Z I 0 .0 r1.C "4~ ccO 40v .0 4) C

0*t 0. m 0 C 04)- 0 ' C -4 c0 04(41410 b 0 410 r.4 cc ý o 414 4 4 C

r.04 C VC ,-4 c c U . ý 4- 440 t. 4 $4 w'ncc t0u 4 41 Jtkl -4 00c 41J 0a to Z a

c CCk 0 cc~ .C .0 ~ 41J c w r C r..1 ý'-4 '- 0 P 04- .~4) U)4 04.1 0 004lb0 W1J V 41

41 Aj .14 u04)0 -4 XC 41 u - 4.1 ~ -d Cr. - 4)00-M4 C: WC"41 04 .0 -4 *.4'0Wa ( 041 -4 0 tk01D0 Ucn

000 -C 4.a 1.104lC1 4-41 C- 0 41 "a~4 0 ~ rX W i-4 .. 4..4. cO41 mC b41 r -4C 004 aOC r.4 ca A-c0 W

0 .blU cC 0-d ECO 4.C 000 cc M .m a$4.4 40) 0cc- $440v0=C 1.) $41 =0 W 4 00 -

ina'0 4 W W W.0 u u.0 ZO w i .04 b Z ci.0 w 0) Ln *.

W z0 44

04 -4 C4

0. 4l C- ýC4 zý0 U (N C4) C4 C(NC

:> od~fl0. a ~ a ( C'. (N N c'Jfn

CCa9

APPENDIX D

PEAK LIMITER TEST RESULTS

0 fn II- -1# n r

f4 fr M! i4

.. .- - . . Vi 'cI% - O 4iv%

I~ Iv

I "Im v -mm No4 f4 fI fnI ý3pa9-3 q~ otI -~ 4 eq - __ __ f_

f1 f4 q___m________n c 0

w: "I S! 1

z~ Q

- - - - ----- - - - - - - - - - - - ---------- -

44I Go. anp6 Ea-n4nf42- -'--!__c m I" s., i

-I -

"I I12 V

•- I f4 e %

CA-

C4 fnen±n r- eqf4r-'IV d a-- r, 0i4; - a--,4.12 a V I

~ze

t, I II"

- I I

0% ~ ~ 0 r% 0% n% 4%e %0 %%0I%z~ ~ n V -1 4 - - i I -

C4 I1 1 . 0 e a { i - .e a I n 0 % * - 1 l