Tuning VHF Duplexer Low Pass Resonators ...................................................................................... 168
Tuning VHF Duplexer High Pass Resonators
..................................................................................... 169
Tuning VHF Duplexer High Notch Loop Assemblies ...........................................................................170
Tuning VHF Duplexer Low Notch Loop Assemblies ............................................................................171
Verifying VHF Duplexer Insertion Loss ................................................................................................173
Verifying VHF Duplexer Isolation .........................................................................................................175
Checking VHF Duplexer After Tuning ................................................................................................. 176
Setting Up for UHF Duplexer Tuning ...................................................................................................176
Tuning UHF Duplexer Low Pass Resonators ......................................................................................177
Tuning UHF Duplexer High Pass Resonators ..................................................................................... 178
Tuning UHF Duplexer High Notch Loop Assemblies ...........................................................................179
Tuning UHF Duplexer Low Notch Loop Assemblies ........................................................................... 180
Verifying UHF Duplexer Insertion Loss ............................................................................................... 182
Verifying UHF Duplexer Isolation ........................................................................................................ 183
Checking UHF Duplexer After Tuning ................................................................................................. 184
Monitoring the Power Supply Module ..................................................................................................185
Verifying Receiver Performance for FDMA Operation .........................................................................185
Verifying Receiver Performance in TTA Operation ............................................................................. 187
Verifying Receiver Performance (Analog Operation) .......................................................................... 190
Checking Receiver Sensitivity (Self-Test Method) (IV and D) ............................................................. 192
Monitoring the Transmitter Metering Points .........................................................................................193
Verifying Transmitter Performance (Digital Operation) ........................................................................193
Verifying Transmitter Performance (Analog Operation) ...................................................................... 195
Setting Up the HPD Service Monitor for Testing the Base Radio ........................................................198
Performing In-band Power Meter User Calibration ..............................................................................199
Measuring HPD Base Radio Tx Power, Frequency Accuracy, and Tx EVM .......................................200
Measuring HPD Base Radio Rx Sensitivity and Rx BER .................................................................... 203
Checking Receiver Sensitivity (Self-test Method) (HPD) .....................................................................206
Replacing a Transceiver Module ......................................................................................................... 231
Replacing the Fan Assembly ...............................................................................................................237
Replacing a Power Supply .................................................................................................................. 238
Replacing a Power Supply Fan ........................................................................................................... 240
Replacing a Power Amplifier ............................................................................................................... 242
Replacing a GTR 8000 Base Radio Backplane ...................................................................................245
Replacing a Preselector Filter ............................................................................................................. 250
Replacing Transmit Filters (700/800 MHz) .......................................................................................... 251
Replacing the Dual Circulator/Isolator Modules .................................................................................. 253
Replacing a Duplexer (700/800 MHz) ................................................................................................. 257
Replacing a Duplexer (UHF) ............................................................................................................... 259
MN003286A01-E
List of Procedures
25
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