Motorola GTR 8000 - Figure 5-10 Verifying VHF Duplexer Isolation - Connecting Test Equipment; How to Verify VHF Duplexer Insertion Loss; Verifying VHF Duplexer Isolation

5.9.4.6.1HowToVerifyVHFDuplexerInsertionLoss
5.9.4.6.1HowToVerifyVHFDuplexerInsertionLoss
ProcedureSteps
1ConnecttestequipmentasshowninFigure5-8.
2ObserveandnotethelevelindBmasshownonthemillivoltmeter.
3ConnecttheduplexercableassemblyandtestequipmenttotheduplexerasshowninFigure5-9.
4ObserveandnotethelevelindBmasshownonthemillivoltmeter.
5Subtracttheabsolutenumbernotedinstep2fromthenumbernotedinstep4.Thedifferenceshouldbeless
than1.3dBtomeetspecicationforInsertionLoss.
6Repeatsteps1through5forLow-Pass/High-Notchcavitieswiththefollowingexceptions:
a.SettheservicemonitortoRxorTxfrequency,whicheverisLOWER
b.ConnectservicemonitortoLowPassduplexerinput(cavity#1)
c.Connectterminatortocavity#6.
5.9.4.7VerifyingVHFDuplexerIsolation
Figure5-10VerifyingVHFDuplexerIsolation—ConnectingTestEquipment
6871022P86-A-November20125-21