Nokia RM-70 - Table of Contents

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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..................................................................................................7–6

Reciever (RX) troubleshooting.........................................................................................................................7–7

GSM Rx chain activation for manual measurements / GSM RSSI measurement..........................................7–9

Transmitter troubleshooting................................................................................................................................7–9

General instructions for TX troubleshooting..................................................................................................7–9

General instructions for TX troubleshooting................................................................................................7–11

Checking antenna functionality.....................................................................................................................7–14

Synthesizer troubleshooting...............................................................................................................................7–15

RF tunings.............................................................................................................................................................7–16

Introduction to RF tunings.............................................................................................................................7–16

Auto tuning for BB5.0.....................................................................................................................................7–16

System mode independent manual tunings.....................................................................................................7–17

RF channel filter calibration...........................................................................................................................7–17

PA (power amplifier) detection.....................................................................................................................7–18

GSM receiver tunings............................................................................................................................................7–18

Rx calibration (GSM)........................................................................................................................................7–18

Rx band filter response compensation (GSM)...............................................................................................7–21

GSM transmitter tunings......................................................................................................................................7–25

Tx IQ tuning (GSM)...........................................................................................................................................7–25

Tx power level tuning (GSM)..........................................................................................................................7–26

List of Tables

Table 12 Rf channel filter calibration tuning limits..........................................................................................7–17

Table 13 RF tuning limits in Rx calibration........................................................................................................7–20

List of Figures

Figure 40 RF Controls window..............................................................................................................................7–7

Figure 41 RSSI Reading window...........................................................................................................................7–9

Figure 42 RF Controls window............................................................................................................................7–11

Figure 43 RF Controls window............................................................................................................................7–14

Figure 44 Antenna module..................................................................................................................................7–14

Figure 45 Auto tuning concept with CMU200....................................................................................................7–16

Figure 46 Rf channel filter calibration typical values.......................................................................................7–17

RM-70

RF Troubleshooting and Manual Tuning Guide Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 7 –3