User Guide

Table of Contents
Introduction to RF troubleshooting .....................................................................................................................7–5
Troubleshooting test point locations PWB top and bottom..............................................................................7–6
Receiver troubleshooting ......................................................................................................................................7–8
Introduction to Rx troubleshooting ................................................................................................................7–8
GSM Rx chain activation for manual measurements / GSM RSSI measurement..........................................7–8
WCDMA Rx chain activation for manual measurement .................................................................................7–9
WCDMA RSSI measurement ........................................................................................................................... 7–10
Transmitter troubleshooting ............................................................................................................................. 7–11
General instructions for Tx troubleshooting ............................................................................................... 7–11
Checking antenna functionality.................................................................................................................... 7–14
RF tunings ............................................................................................................................................................ 7–15
Introduction to RF tunings............................................................................................................................ 7–15
RF autotuning................................................................................................................................................. 7–15
RF autotuning............................................................................................................................................ 7–15
RF manual tuning guide ................................................................................................................................ 7–17
Required manual tunings after component changes............................................................................ 7–17
System mode independent manual tunings.......................................................................................... 7–17
Rf channel filter calibration ................................................................................................................ 7–17
PA (power amplifier) detection .......................................................................................................... 7–18
Temperature sensor calibration ........................................................................................................ 7–18
GSM receiver tunings................................................................................................................................. 7–19
Rx calibration (GSM)............................................................................................................................. 7–19
Rx band filter response compensation (GSM) ................................................................................... 7–21
Rx AM suppression (GSM)..................................................................................................................... 7–26
GSM transmitter tunings........................................................................................................................... 7–29
Tx IQ selftuning (GSM).......................................................................................................................... 7–29
Tx power level tuning (GSM) ............................................................................................................... 7–30
WCDMA receiver tunings........................................................................................................................... 7–33
RX calibration (WCDMA)....................................................................................................................... 7–33
WCDMA transmitter tunings..................................................................................................................... 7–35
Tx AGC & power detector (WCDMA) .................................................................................................... 7–35
Tx band response calibration (WCDMA)............................................................................................. 7–40
Tx LO leakage (WCDMA) ....................................................................................................................... 7–42
WLAN troubleshooting........................................................................................................................................ 7–42
Introduction to WLAN troubleshooting ....................................................................................................... 7–42
WLAN functionality test using SB-7 and Phoenix........................................................................................ 7–43
List of Tables
Table 11 GSM TXFEM / Antenna load switch CONTROL ........................................................................................7–7
Table 12 Attenuation values for galvanic RF connection Module Jig MJ-120 ................................................ 7–15
Table 13 Rf channel filter calibration tuning limits......................................................................................... 7–18
Table 14 Temperature sensor calibration tuning limits ................................................................................. 7–19
Table 15 RF tuning limits in Rx calibration....................................................................................................... 7–21
Table 16 RSSI level values................................................................................................................................... 7–28
Table 17 ............................................................................................................................................................... 7–31
Table 18 ............................................................................................................................................................... 7–39
List of Figures
RM-208
RF Troubleshooting and Manual Tuning Guide Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 7 –3
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