Table Of Contents - Nokia RM-94 Rf Troubleshooting Instructions

RM-94
6(b) - RF Troubleshooting Instructions

Table of Contents

General Information on RF Troubleshooting ................................................... 5
Test environment ............................................................................................... 5
Test conditions................................................................................................... 5
Receiver Verification and Troubleshooting ...................................................... 7
General instructions for RX troubleshooting ...................................................... 7
Measuring RX I/Q signals using RSSI reading .................................................. 7
Measuring RX performance using SNR measurement .................................... 8
Measuring front-end power levels using spectrum analyzer ............................ 9
Measuring analogue RX I/Q signals using oscilloscope ................................ 10
Fault finding chart of the receiver..................................................................... 11
Transmitter ........................................................................................................ 18
General instructions for TX troubleshooting..................................................... 18
GSM900 transmitter ......................................................................................... 18
General instructions for GSM900 TX troubleshooting ................................... 18
Fault finding chart for GSM900 transmitter .................................................... 20
GSM1800 transmitter ....................................................................................... 22
General instructions for GSM1800 TX troubleshooting ................................. 22
Fault finding chart for GSM1800 transmitter .................................................. 24
GSM1900 transmitter ....................................................................................... 26
General instructions for GSM1900 TX troubleshooting ................................. 26
Fault finding chart for GSM1900 transmitter .................................................. 28
Synthesizer ........................................................................................................ 31
General instructions for synthesizer troubleshooting ....................................... 31
Checking synthesizer operation....................................................................... 31
Fault finding chart for PLL synthesizer............................................................. 34
Frequency tables ............................................................................................. 36
GSM900 (including EGSM900) ...................................................................... 36
GSM1800 ....................................................................................................... 37
GSM1900 ....................................................................................................... 38
DC Supply Voltage Check ................................................................................ 39
Receiver test points ......................................................................................... 42
Transmitter test points ..................................................................................... 44
Synthesizer test points ..................................................................................... 47
Issue 1 04/2005 COMPANY CONFIDENTIAL
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