User Guide

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Table of Contents

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

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

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

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

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

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

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

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

GSM1900 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

TX 900 troubleshooting..................................................................................................................................7–16

TX 1800/1900 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............................................................................................................................................7–23

Rx calibration (GSM)........................................................................................................................................7–23

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

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

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

Tx power level tuning (GSM)..........................................................................................................................7–32

List of Tables

Table 10 Rf channel filter calibration tuning limits..........................................................................................7–22

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

List of Figures

Figure 45 RM-86 RF bottom side key components..............................................................................................7–5

Figure 46 RM-86 RF top side key components.....................................................................................................7–6

Figure 47 RM-86 antenna connector placement.................................................................................................7–6

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

Figure 49 RSSI Reading window.........................................................................................................................7–13

Figure 50 RF Controls window............................................................................................................................7–15

Figure 51 Main antenna.......................................................................................................................................7–18

Figure 52 Rf channel filter calibration typical values.......................................................................................7–22

RM-86

RF Troubleshooting and Manual Tuning Guide Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 7 –3