Инструкции По Обслуживанию для Nokia 3220
Nokia Customer Care
6(b) - RF Troubleshooting Instructions
RH-37
Issue 1 07/04
Nokia Corporation
Page 1
Table of Contents
Page No
Test environment ..................................................................................................................................5
Test conditions ......................................................................................................................................6
Test conditions ......................................................................................................................................6
Measuring RX performance using SNR measurement ............................................................ 9
Measuring front-end power levels using spectrum analyzer............................................. 10
Measuring analogue RX I/Q signals using oscilloscope....................................................... 11
Measuring front-end power levels using spectrum analyzer............................................. 10
Measuring analogue RX I/Q signals using oscilloscope....................................................... 11
General instructions for GSM TX troubleshooting ................................................................ 19
Fault finding chart for GSM900 transmitter .......................................................................... 22
Fault finding chart for GSM900 transmitter .......................................................................... 22
General instructions for GSM1800 TX troubleshooting ...................................................... 24
Fault finding chart for GSM1800 transmitter........................................................................ 26
Fault finding chart for GSM1800 transmitter........................................................................ 26
General instructions for GSM1900 TX troubleshooting ...................................................... 28
Fault finding chart for GSM1900 transmitter........................................................................ 30
Fault finding chart for GSM1900 transmitter........................................................................ 30
General instructions for synthesizer troubleshooting ..............................................................33
Checking synthesizer operation .....................................................................................................33
Fault finding chart for PLL synthesizer ........................................................................................36
Frequency tables .................................................................................................................................38
Checking synthesizer operation .....................................................................................................33
Fault finding chart for PLL synthesizer ........................................................................................36
Frequency tables .................................................................................................................................38
GSM900 (including EGSM900)................................................................................................... 38
GSM1800 .......................................................................................................................................... 39
GSM1900 .......................................................................................................................................... 41
GSM1800 .......................................................................................................................................... 39
GSM1900 .......................................................................................................................................... 41
Receiver test points ...........................................................................................................................47
Transmitter test points ......................................................................................................................49
Synthesizer test points ......................................................................................................................52
Transmitter test points ......................................................................................................................49
Synthesizer test points ......................................................................................................................52