Table Of Contents - Nokia NPM-10 Series Troubleshooting Instructions

CCS Technical Documentation
Contents
Abbreviations in Troubleshooting Charts ....................................................................5
Introduction ..................................................................................................................5
General Description of the RF Circuits .......................................................................6
Receiver Signal Path ................................................................................................. 6
Transmitter Signal Path ............................................................................................. 7
PLL............................................................................................................................ 8
Key RF Component Placement ............................................................................... 10
Power Supply Configuration................................................................................... 11
Receiver .....................................................................................................................13
General Instructions for GSM850 RX Troubleshooting ......................................... 13
Troubleshooting Chart for GSM850 Receiver ........................................................ 15
General Instructions for GSM1900 RX Troubleshooting ....................................... 16
Troubleshooting Chart for PCS Receiver................................................................ 18
Measurement Points in the Receiver....................................................................... 20
Transmitter .................................................................................................................22
Measurement Points for the Transmitter................................................................. 22
General Instructions for GSM TX Troubleshooting ............................................... 23
Troubleshooting Chart for GSM850 Transmitter.................................................... 24
General instructions for PCS TX troubleshooting .................................................. 26
Synthesizer .................................................................................................................29
General Instructions for Synthesizer Troubleshooting............................................ 29
26 MHz Reference Oscillator ( VCXO )................................................................. 30
VCO ........................................................................................................................ 30
Troubleshooting Chart for PLL Synthesizer .......................................................... 31
Measurement Points for the PLL ............................................................................ 32
Frequency Lists ....................................................................................................... 34
Alignment ..................................................................................................................36
3595 Manual Align with Phoenix ........................................................................... 36
RX Calibration ........................................................................................................ 37
RX Channel Select Filter......................................................................................... 39
RX Band Filter Response........................................................................................ 40
Tx Tuning ..................................................................................................................41
TX Power Tuning GSM850 .................................................................................... 43
TX Power Tuning PCS1900.................................................................................... 44
TX I/Q Tuning ...........................................................................................................44
RF Control .................................................................................................................48
Call Testing ................................................................................................................48
Issue 1 03/2003
Nokia Corporation
Troubleshooting Instructions RF
Confidential
NPM-10
Page No
Page 3