Motorola GTR 8000 - Preparing the Equipment for UHF Alignment; UHF Tuning Procedure

GTR8000BaseRadio
ProcedureSteps
1FromthesitedocumentationortheCSS,notethereceivefrequencyforeachchannelsupportedbythebase
radio/receiver.
2Calculateamidpointfrequencyasfollows:
F
mid
=(F
highest
+F
lowest
)÷2
3UsingF
mid
inplaceofthebaseradioreceivefrequency,performsteps1through4from5.8.2.1.1Calculating
TheUHFAlignmentFrequencyForaSingleReceiveFrequency,page5-8.
5.8.2.2PreparingTheEquipmentForUHFAlignment
ProcedureSteps
1Makesurebaseradio/receiver(withpreselectorassembly)isinstalledinafunctionalstationcageequipped
withapowersupplymodule.
2Usingthetorquedriveranddeepwellsocket,loosenthethreetensionnutsontheadjustmentscrews.
3Detunethepreselectorbyturningtuningscrews3and4clockwiseuntiltheybottomout.Becarefulnottoapply
morethan3in-lbsoftorquetopreventwarpingpreselectorcoverandhousing.
4SeeFigure5-2.
5.8.2.3UHFTuningProcedure
SeeFigure5-2forthelocationofthetuningscrewsandcavityprobeholes.
Whentuningforpeakordip,turnthetuningscrew1/2turnpastthepeakordiptoverifythatyouhave
obtainedatruepeakordip.Afterensuringyouhavefoundtruepeakordip,turnthescrewbacktothe
locationoftheoriginalpeakordip.
5-106871022P86-A-November2012