User Guide

Table of Contents
Introduction to RF troubleshooting.....................................................................................................................7–5
RF key component placement...............................................................................................................................7–5
Troubleshooting test point locations...................................................................................................................7–8
Receiver troubleshooting....................................................................................................................................7–12
Introduction to Rx troubleshooting..............................................................................................................7–12
GSM Rx chain activation for manual measurements / GSM RSSI measurement........................................7–12
WCDMA Rx chain activation for manual measurement...............................................................................7–13
WCDMA RSSI measurement............................................................................................................................7–14
Transmitter troubleshooting..............................................................................................................................7–15
General instructions for Tx troubleshooting................................................................................................7–15
Checking antenna functionality.....................................................................................................................7–18
RF tunings.............................................................................................................................................................7–19
Introduction to RF tunings.............................................................................................................................7–19
RF autotuning..................................................................................................................................................7–20
RF autotuning.............................................................................................................................................7–20
RF manual tuning guide.................................................................................................................................7–22
Required manual tunings after component changes.............................................................................7–22
System mode independent manual tunings...........................................................................................7–23
Rf channel filter calibration.................................................................................................................7–23
PA (power amplifier) detection...........................................................................................................7–24
Temperature sensor calibration .........................................................................................................7–24
GSM receiver tunings.................................................................................................................................7–25
Rx calibration (GSM)..............................................................................................................................7–25
Rx band filter response compensation (GSM)....................................................................................7–28
Rx AM suppression (GSM)......................................................................................................................7–33
GSM transmitter tunings............................................................................................................................7–35
Tx IQ tuning (GSM).................................................................................................................................7–35
Tx power level tuning (GSM)................................................................................................................7–37
WCDMA receiver tunings............................................................................................................................7–40
Rx AGC alignment (WCDMA)..................................................................................................................7–40
Rx band response calibration (WCDMA)..............................................................................................7–41
WCDMA transmitter tunings......................................................................................................................7–44
Tx AGC & power detector (WCDMA).....................................................................................................7–44
Tx band response calibration (WCDMA)..............................................................................................7–50
Tx LO leakage (WCDMA)........................................................................................................................7–52
List of Tables
Table 8 Rf channel filter calibration tuning limits............................................................................................7–23
Table 9 Temperature sensor calibration tuning limits.....................................................................................7–25
Table 10 RF tuning limits in Rx calibration........................................................................................................7–27
Table 11 RSSI level values....................................................................................................................................7–34
List of Figures
Figure 51 RM-24 bottom differences in key component placement.................................................................7–6
Figure 52 RM-24 top diffecences in key component placement........................................................................7–6
Figure 53 RM-10 bottom key component placement.........................................................................................7–7
Figure 54 RM-10 top key component placement................................................................................................7–7
Figure 55 Test point locations for spectrum analyser - bottom........................................................................7–8
RM-10;RM-24
RF Troubleshooting and Manual Tuning Guide Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 7 –3
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