User Guide

NPM-10 (3595)
Troubleshooting - RF CC Technical Documentation
Page 2 ©2004 Nokia Corporation Confidential Issue 2 03/2004
Contents Page
RF Troubleshooting ....................................................................................................... 3
Abbreviations in Troubleshooting Charts ....................................................................3
Introduction ..................................................................................................................3
General Description of the RF Circuits .......................................................................4
Receiver Signal Path ................................................................................................. 4
Transmitter Signal Path............................................................................................. 5
PLL............................................................................................................................ 5
Key RF Component Placement................................................................................. 7
Power Supply Configuration..................................................................................... 8
Receiver .....................................................................................................................10
General Instructions for GSM 850 Rx Troubleshooting......................................... 10
Troubleshooting Chart for the GSM 850 Receiver................................................. 12
General Instructions for GSM 1900 Rx Troubleshooting....................................... 13
Troubleshooting Chart for PCS Receiver................................................................ 15
Measurement Points in the Receiver....................................................................... 17
Transmitter .................................................................................................................18
Measurement Points for the Transmitter................................................................. 18
General Instructions for GSM Tx Troubleshooting................................................ 19
Troubleshooting Chart for GSM 850 Transmitter................................................... 21
General instructions for PCS Tx troubleshooting ................................................... 23
Synthesizer .................................................................................................................26
General Instructions for Synthesizer Troubleshooting............................................ 26
26 MHz Reference Oscillator (VCXO)................................................................... 27
VCO ........................................................................................................................ 28
Troubleshooting Chart for PLL Synthesizer.......................................................... 28
Measurement Points for the PLL ............................................................................ 31
Frequency Lists ....................................................................................................... 33
Alignment ..................................................................................................................35
NPM-10 (3595) Manual Align with Phoenix.......................................................... 35
Rx Calibration ......................................................................................................... 36
Rx Channel Select Filter ......................................................................................... 39
Rx Band Filter Response......................................................................................... 40
Tx Tuning ..................................................................................................................42
Tx Power Tuning GSM 850.................................................................................... 42
Tx Power Tuning PCS 1900.................................................................................... 44
Tx I/Q Tuning ............................................................................................................44
RF Control .................................................................................................................48
Call Testing ................................................................................................................48