User Guide

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Table of Contents

Introduction to RF troubleshooting.....................................................................................................................7–5

Receiver troubleshooting......................................................................................................................................7–5

Introduction to RX troubleshooting................................................................................................................7–5

General instructions for RX troubleshooting..................................................................................................7–5

Synthesizer troubleshooting............................................................................................................................7–8

GSM850 RX troubleshooting.............................................................................................................................7–9

GSM900 RX troubleshooting...........................................................................................................................7–10

GSM1800 RX troubleshooting.........................................................................................................................7–11

GSM1900 RX troubleshooting.........................................................................................................................7–12

GSM Rx chain activation for manual measurements / GSM RSSI measurement........................................7–13

Transmitter troubleshooting..............................................................................................................................7–13

General instructions for TX troubleshooting................................................................................................7–13

GSM850/900 TX troubleshooting...................................................................................................................7–16

GSM1800/1900 TX troubleshooting...............................................................................................................7–17

Checking antenna functionality.....................................................................................................................7–18

RF tunings.............................................................................................................................................................7–18

Introduction to RF tunings.............................................................................................................................7–18

RF autotuning..................................................................................................................................................7–19

System mode independent manual tunings.....................................................................................................7–21

Rf channel filter calibration............................................................................................................................7–21

PA (power amplifier) detection.....................................................................................................................7–22

GSM receiver tunings............................................................................................................................................7–22

Rx calibration (GSM)........................................................................................................................................7–22

Rx band filter response compensation (GSM)...............................................................................................7–26

GSM transmitter tunings......................................................................................................................................7–31

Tx IQ tuning (GSM)...........................................................................................................................................7–31

Tx power level tuning (GSM)..........................................................................................................................7–33

List of Tables

Table 10 Rf channel filter calibration tuning limits..........................................................................................7–21

Table 11 RF tuning limits in Rx calibration........................................................................................................7–25

List of Figures

Figure 47 RF Controls window..............................................................................................................................7–7

Figure 48 RSSI Reading window.........................................................................................................................7–13

Figure 49 RF Controls window............................................................................................................................7–15

Figure 50 Main antenna.......................................................................................................................................7–18

Figure 51 Rf channel filter calibration typical values.......................................................................................7–22

RM-170; RM-171

RF Troubleshooting and Manual Tuning Guide Nokia Customer Care

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