Instruction Manual

Table Of Contents
Tuning VHF Duplexer Low Pass Resonators ...................................................................................... 169
Tuning VHF Duplexer High Pass Resonators
..................................................................................... 170
Tuning VHF Duplexer High Notch Loop Assemblies ...........................................................................171
Tuning VHF Duplexer Low Notch Loop Assemblies ............................................................................172
Verifying VHF Duplexer Insertion Loss ................................................................................................174
Verifying VHF Duplexer Isolation .........................................................................................................176
Checking VHF Duplexer After Tuning ................................................................................................. 177
Setting Up for UHF Duplexer Tuning ...................................................................................................177
Tuning UHF Duplexer Low Pass Resonators ......................................................................................178
Tuning UHF Duplexer High Pass Resonators ..................................................................................... 179
Tuning UHF Duplexer High Notch Loop Assemblies ...........................................................................180
Tuning UHF Duplexer Low Notch Loop Assemblies ........................................................................... 181
Verifying UHF Duplexer Insertion Loss ............................................................................................... 183
Verifying UHF Duplexer Isolation ........................................................................................................ 184
Checking UHF Duplexer After Tuning ................................................................................................. 185
Monitoring the Power Supply Module ..................................................................................................186
Verifying Receiver Performance for FDMA Operation .........................................................................186
Verifying Receiver Performance in TTA Operation ............................................................................. 188
Verifying Receiver Performance (Analog Operation) .......................................................................... 191
Checking Receiver Sensitivity (Self-Test Method) (IV and D) ............................................................. 193
Monitoring the Transmitter Metering Points .........................................................................................194
Verifying Transmitter Performance (Digital Operation) ........................................................................194
Verifying Transmitter Performance (Analog Operation) ...................................................................... 196
Setting Up the HPD Service Monitor for Testing the Base Radio ........................................................199
Performing In-band Power Meter User Calibration ..............................................................................200
Measuring HPD Base Radio Tx Power, Frequency Accuracy, and Tx EVM .......................................201
Measuring HPD Base Radio Rx Sensitivity and Rx BER .................................................................... 204
Checking Receiver Sensitivity (Self-test Method) (HPD) .....................................................................207
Replacing a Transceiver Module ......................................................................................................... 232
Replacing the Fan Assembly ...............................................................................................................238
Replacing a Power Supply .................................................................................................................. 239
Replacing a Power Supply Fan ........................................................................................................... 241
Replacing a Power Amplifier ............................................................................................................... 243
Replacing a GTR 8000 Base Radio Backplane ...................................................................................246
Replacing a Preselector Filter ............................................................................................................. 251
Replacing Transmit Filters (700/800 MHz) .......................................................................................... 252
Replacing the Dual Circulator/Isolator Modules .................................................................................. 254
Replacing a Duplexer (700/800 MHz) ................................................................................................. 258
Replacing a Duplexer (UHF) ............................................................................................................... 260
MN003286A01-H
List of Procedures
25