Motorola GTR 8000 - How to Verify UHF Duplexer Isolation; UHF Duplexer Post Tuning Checks; Testing the GTR 8000 Base Radio;Gpw 8000 Receiver Performance with a Service Monitor for Integrated Voice and Data

5.9.5.7.1HowToV erifyUHFDuplexerIsolation
5.9.5.7.1HowToVerifyUHFDuplexerIsolation
ProcedureSteps
1ConnecttestequipmentasshowninFigure5-19.
2ObserveandnotethelevelindBmasshownontheservicemonitor.
3ConnectthetestequipmenttotheduplexerasshowninFigure5-20.
4ObserveandnotethelevelindBmasshownontheservicemonitor.(Ifnonumberisdisplayed,consider
isolationtobegreaterthan105dB,whichexceedsthespecication.)
5Subtracttheabsolutenumbernotedinstep4fromthenumbernotedinstep2.Thedifferenceshouldbe
higherthan100dBtomeetspecicationforIsolation.
6Repeatsteps1through5forLow-Pass/High-Notchcavitieswiththefollowingexceptions:
a.SetservicemonitortorRxorTxfrequency,whicheverisHIGHER
b.ConnectservicemonitortoLowPassduplexerinput(cavity#1)
c.Connectterminatortocavity#6.
5.9.5.8UHFDuplexerPostTuningChecks
ProcedureSteps
1Makesureallnotchadjustmentlocknuts(6)aretight.
2Makesureallpassadjustmentlocknuts(6)aretight.
5.10TestingtheGTR8000BaseRadio/GPW8000
ReceiverPerformancewithaServiceMonitorfor
IntegratedVoiceandData
Theservicemonitorisatoolusedtotestandmeasurethetransmitterandreceivercharacteristicsofthebaseradio.
TheServiceMonitormaybeconnectedtoabaseradiotoperformtestsandmeasurementsdesignedtodetermine
whethertheequipmentisoperatingwithinspecications.
Thesectionsthatfollowcontainproceduresthatareperformedwhenyourstsetupyoursystemandcanalsobe
scheduledonaregularbasisaspartofthemaintenancepoliciesofyourorganization.Topicscoveredinclude:
•5.10.1DeviationStandards(DigitalOperation),page5-34
•5.10.2MonitoringthePowerSupplyModule,page5-35
6871022P86-A-November20125-33