User Guide

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Table of Contents

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

RF key component placement...............................................................................................................................7–5

Receiver troubleshooting......................................................................................................................................7–6

Introduction to RX troubleshooting................................................................................................................7–6

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

Synthesizer troubleshooting............................................................................................................................7–9

RX GSM850 troubleshooting...........................................................................................................................7–10

RX GSM900 troubleshooting...........................................................................................................................7–11

RX GSM1800 troubleshooting.........................................................................................................................7–12

RX GSM1900 troubleshooting.........................................................................................................................7–13

GSM Rx chain activation for manual measurements / GSM RSSI measurement........................................7–14

Transmitter troubleshooting..............................................................................................................................7–14

General instructions for TX troubleshooting................................................................................................7–14

TX 850/900 troubleshooting..........................................................................................................................7–17

TX 1800/1900 troubleshooting......................................................................................................................7–18

Checking antenna functionality.....................................................................................................................7–19

RF tunings.............................................................................................................................................................7–19

Introduction to RF tunings.............................................................................................................................7–19

RF autotuning..................................................................................................................................................7–20

System mode independent manual tunings.....................................................................................................7–22

Rf channel filter calibration............................................................................................................................7–22

PA (power amplifier) detection.....................................................................................................................7–23

GSM receiver tunings............................................................................................................................................7–24

Rx calibration (GSM)........................................................................................................................................7–24

Rx band filter response compensation (GSM)...............................................................................................7–27

GSM transmitter tunings......................................................................................................................................7–32

Tx IQ tuning (GSM)...........................................................................................................................................7–32

Tx power level tuning (GSM)..........................................................................................................................7–34

List of Tables

Table 11 Rf channel filter calibration tuning limits..........................................................................................7–23

Table 12 RF tuning limits in Rx calibration........................................................................................................7–26

List of Figures

Figure 47 RM-198 RF key component placement................................................................................................7–6

Figure 48 RF Controls window..............................................................................................................................7–8

Figure 49 RSSI Reading window.........................................................................................................................7–14

Figure 50 RF Controls window............................................................................................................................7–16

Figure 51 BT antenna, feed and GND spots of the main antenna...................................................................7–19

Figure 52 Rf channel filter calibration typical values.......................................................................................7–23

RM-198

RF Troubleshooting and Manual Tuning Guide Nokia Customer Care

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