Motorola ASTRO 25 GTR 8000 Manual page 12

MN003286A01-E
Contents
5.9 Tuning a Preselector............................................................................................................159
5.9.1 VHF Tuning Procedures........................................................................................ 160
5.9.1.1 Calculating Proper VHF Alignment Frequency........................................ 160
5.9.1.2 Preparing the Equipment for VHF Alignment........................................... 161
5.9.1.3 Tuning The VHF Preselector....................................................................161
5.9.2 UHF Tuning Procedures........................................................................................ 162
5.9.2.1 Calculating Proper UHF Alignment Frequency........................................ 163
5.9.2.2 Preparing the Equipment for UHF Alignment...........................................164
5.9.2.3 Tuning The UHF Preselector................................................................... 164
5.10 Tuning a Duplexer............................................................................................................. 165
5.10.1 Field Tuning Overview......................................................................................... 165
5.10.2 Required Test Equipment.................................................................................... 165
5.10.3 Tuning a 700/800 MHz Duplexer......................................................................... 166
5.10.4 Tuning a VHF Duplexer....................................................................................... 166
5.10.4.1 VHF Duplexer Tuning Setup.................................................................. 166
5.10.4.2 VHF Duplexer Low Pass Resonators Tuning Set Up.............................168
5.10.4.3 VHF Duplexer High Pass Resonators Tuning Set Up............................169
5.10.4.4 VHF Duplexer High Notch Loop Assemblies Tuning Set Up................. 170
5.10.4.5 VHF Duplexer Low Notch Loop Assemblies Tuning Set Up.................. 171
5.10.4.6 VHF Duplexer Insertion Loss Verification Set Up.................................. 172
5.10.4.7 VHF Duplexer Isolation Verification Set Up........................................... 174
5.10.4.8 Checking VHF Duplexer After Tuning.................................................... 176
5.10.5 Tuning a UHF Duplexer....................................................................................... 176
5.10.5.1 UHF Duplexer Tuning Set Up................................................................ 176
5.10.5.2 UHF Duplexer Low Pass Resonators Tuning Set Up............................ 177
5.10.5.3 UHF Duplexer High Pass Resonators Tuning Set Up............................178
5.10.5.4 UHF Duplexer High Notch Loop Assemblies Tuning Set Up................. 179
5.10.5.5 UHF Duplexer Low Notch Loop Assemblies Tuning Set Up.................. 180
5.10.5.6 UHF Duplexer Insertion Loss Verification Set Up.................................. 181
5.10.5.7 UHF Duplexer Isolation Verification Set Up........................................... 182
5.10.5.8 Checking UHF Duplexer After Tuning....................................................184
5.11 Testing the GTR 8000 Base Radio Performance with a Service Monitor for Integrated
Voice and Data..................................................................................................................... 184
5.11.1 Deviation Standards (Digital Operation).............................................................. 184
5.11.2 Monitoring the Power Supply Module.................................................................. 185
5.11.3 Verifying Receiver Performance for FDMA Operation......................................... 185
5.11.4 Verifying Receiver Performance in TTA Operation..............................................187
5.11.4.1 Effective Receiver Sensitivity................................................................. 190
5.11.5 Verify Receiver Performance for APCO TDMA Operation...................................190
5.11.6 Verifying Receiver Performance (Analog Operation)...........................................190
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