User Guide

Table of Contents
Introduction to RF troubleshooting.........................................................................................................................................7–5
RM-1 RF key component placement.........................................................................................................................................7–5
RM-1 fault finding test point locations....................................................................................................................................7–7
Receiver troubleshooting............................................................................................................................................................7–9
Introduction to Rx troubleshooting...................................................................................................................................7–9
GSM Rx chain activation for manual measurements / GSM RSSI measurement................................................7–10
WCDMA Rx chain activation for manual measurement.............................................................................................7–11
WCDMA RSSI measurement.................................................................................................................................................7–12
Transmitter troubleshooting...................................................................................................................................................7–12
General instructions for Tx troubleshooting.................................................................................................................7–12
Checking antennae functionality......................................................................................................................................7–15
RF manual tuning guide............................................................................................................................................................7–17
Introduction to RF tunings.................................................................................................................................................7–17
RF autotuning with CMU200...............................................................................................................................................7–18
System mode independent manual tunings......................................................................................................................7–25
RF channel filter calibration...............................................................................................................................................7–25
PA detection............................................................................................................................................................................7–26
Temperature sensor calibration ......................................................................................................................................7–26
GSM receiver tunings..................................................................................................................................................................7–27
Rx calibration (GSM)..............................................................................................................................................................7–27
Rx band filter response compensation (GSM)...............................................................................................................7–30
Rx AM suppression (GSM).....................................................................................................................................................7–34
GSM transmitter tunings...........................................................................................................................................................7–35
Tx IQ tuning (GSM).................................................................................................................................................................7–35
Tx power level tuning (GSM)..............................................................................................................................................7–37
WCDMA receiver tunings............................................................................................................................................................7–41
Rx AGC alignment (WCDMA)................................................................................................................................................7–41
Rx band response calibration (WCDMA)..........................................................................................................................7–43
WCDMA transmitter tunings.....................................................................................................................................................7–46
Tx AGC & power detector (WCDMA)..................................................................................................................................7–46
Tx band response calibration (WCDMA)..........................................................................................................................7–51
Tx LO leakage (WCDMA)........................................................................................................................................................7–52
List of Tables
Table 4 RF channel filter calibration tuning limits.............................................................................................................7–25
Table 5 Temperature sensor calibration tuning limits.....................................................................................................7–27
Table 6 RF tuning limits in Rx calibration.............................................................................................................................7–29
List of Figures
Figure 63 RF key component placement.................................................................................................................................7–6
Figure 64 Test point locations for spectrum analyzer.........................................................................................................7–7
Figure 65 Test points for oscilloscope - bottom....................................................................................................................7–8
Figure 66 Test points for oscilloscope - top............................................................................................................................7–9
Figure 67 RSSI Reading window..............................................................................................................................................7–10
Figure 68 Activating Rx Control window in Phoenix.........................................................................................................7–11
Figure 69 Rx Control window...................................................................................................................................................7–11
Figure 70 RF Controls window..................................................................................................................................................7–14
Figure 71 Tx Control window....................................................................................................................................................7–15
RM-1
RF Troubleshooting and Manual Tuning Guide Nokia Customer Care
Issue 1 Company Confidential Page 7–3
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