User Guide

Table of Contents
Introduction to RF troubleshooting.....................................................................................................................7–5
RF key components................................................................................................................................................7–6
Receiver troubleshooting......................................................................................................................................7–7
Introduction to RX troubleshooting................................................................................................................7–7
General instructions for RX troubleshooting..................................................................................................7–8
Reciever (RX) troubleshooting.........................................................................................................................7–9
GSM Rx chain activation for manual measurements / GSM RSSI measurement........................................7–11
Transmitter troubleshooting..............................................................................................................................7–11
General instructions for TX troubleshooting................................................................................................7–11
Transceiver (TX) troubleshooting..................................................................................................................7–14
Checking antenna functionality.....................................................................................................................7–15
Synthesizer troubleshooting...............................................................................................................................7–16
RF tunings.............................................................................................................................................................7–17
Introduction to RF tunings.............................................................................................................................7–17
Auto tuning for BB5.0.....................................................................................................................................7–17
System mode independent manual tunings.....................................................................................................7–18
RF channel filter calibration...........................................................................................................................7–18
PA (power amplifier) detection.....................................................................................................................7–19
GSM receiver tunings............................................................................................................................................7–19
Rx calibration (GSM)........................................................................................................................................7–19
Rx band filter response compensation (GSM)...............................................................................................7–22
GSM transmitter tunings......................................................................................................................................7–26
Tx IQ tuning (GSM)...........................................................................................................................................7–26
Tx power level tuning (GSM)..........................................................................................................................7–27
List of Tables
Table 13 Rf channel filter calibration tuning limits..........................................................................................7–18
Table 14 RF tuning limits in Rx calibration........................................................................................................7–21
List of Figures
Figure 45 RF key components on main board (bottom side)............................................................................7–6
Figure 46 RF key components on main board (top side)...................................................................................7–7
Figure 47 RF Controls window..............................................................................................................................7–9
Figure 48 RSSI Reading window.........................................................................................................................7–11
Figure 49 RF Controls window............................................................................................................................7–13
Figure 50 Antenna module..................................................................................................................................7–15
Figure 51 Auto tuning concept with CMU200....................................................................................................7–17
Figure 52 Rf channel filter calibration typical values.......................................................................................7–18
RM-209
RF Troubleshooting and Manual Tuning Guide Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 7 –3
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