Motorola GTR 8000 - VHF Tuning Procedures; Calculating Proper VHF Alignment Frequency; Calculating the VHF Alignment Frequency for a Single Receive Frequency; Calculating the VHF Alignment Frequency for Multi Receive Frequencies

5.8.1VHFTuningProcedures
5.8.1VHFTuningProcedures
5.8.1.1CalculatingProperVHFAlignmentFrequency
Useeither5.8.1.1.1CalculatingTheVHFAlignmentFrequencyForaSingleReceiveFrequency,page5-5or
5.8.1.1.2CalculatingTheVHFAlignmentFrequencyforMultiReceiveFrequencies,page5-5tocalculatetheVHF
alignmentfrequencytobegeneratedbythesignalgenerator.
5.8.1.1.1CalculatingTheVHFAlignmentFrequencyForaSingleReceive
Frequency
Whenandwheretouse:
Forbaseradioswithasinglereceivefrequency,calculatethefrequencyofthealignmentsignalasfollows:
ProcedureSteps
1FromthesitedocumentationortheCSS,determinethebaseradioreceivefrequency.
2Ifthefrequencyis≤148MHzor≥156MHz,subtract250kHz.Otherwise,notetheactualfrequency.
Stepexample:Ifthebaseradioreceivefrequencyis138.575MHz,subtract250kHzbecausethefrequencyis
lessthan148MHz:138.575MHz–250kHz=138.325MHz
3IfthepreselectorisRange1(136–154MHz),determinethealignmentfrequencyasfollows:
Iffrequency(fromStep2)is>152MHz,thenalignmentfrequency=152MHz.
Otherwise,useactualfrequencyfromStep2.
4IfthepreselectorisRange2(150–174MHz),determinethealignmentfrequencyasfollows:
Ifthefrequency(fromStep2)is<152MHz,thenalignmentfrequency=151.75MHz.
Iffrequency(fromStep2)is>172MHz,thenalignmentfrequency=172MHz.
Otherwise,useactualfrequencyfromStep2.
5.8.1.1.2CalculatingTheVHFAlignmentFrequencyforMultiReceive
Frequencies
Whenandwheretouse:
Forbaseradios/receiverswithmultiplereceivefrequencies,calculatethefrequencyofthealignmentsignal
asfollows:
6871022P86-A-November20125-5