Nokia 6111 RM-82 Service Manual page 181

RM-82
RF troubleshooting
Introduction to RF troubleshooting for analysis.................................................................................................8-5
Auto tuning.............................................................................................................................................................8-5
RX manual tuning...................................................................................................................................................8-6
Calibrating RX Channel Select Filter.................................................................................................................8-6
RX calibration.....................................................................................................................................................8-7
RX band filter response compensation (GSM).................................................................................................8-9
TX manual tuning.................................................................................................................................................8-14
TX power level tuning (GSM)..........................................................................................................................8-14
Tuning TX/IQ....................................................................................................................................................8-18
Troubleshooting...................................................................................................................................................8-23
RX troubleshooting.........................................................................................................................................8-23
TX troubleshooting.........................................................................................................................................8-26
Helgo troubleshooting....................................................................................................................................8-30
Synthesizer troubleshooting..........................................................................................................................8-31
List of Tables
Table 9 RX calibration settings..............................................................................................................................8-8
Table 10 RX band filter response tuning values................................................................................................8-12
Table 11 TX power tuning targets......................................................................................................................8-16
Table 12 TX power level tuning coefficient values...........................................................................................8-17
Table 13 Spectrum analyzer settings.................................................................................................................8-19
Table 14 RF Control window settings.................................................................................................................8-21
List of Figures
Figure 102 Auto tuning concept with CMU200....................................................................................................8-5
Figure 103 Auto tuning concept with RX and TX tuning devices and splitter..................................................8-6
Figure 104 RX Channel Select Filter Calibration...................................................................................................8-7
Figure 105 RX calibration (Example)....................................................................................................................8-8
Figure 106 RX calibration with band EGSM900 (Example).................................................................................8-9
Figure 107 RX calibration values (Example)........................................................................................................8-9
Figure 108 TX power level tuning window (example).....................................................................................8-16
Figure 109 RF controls.........................................................................................................................................8-19
Figure 110 Tx IQ tuning.......................................................................................................................................8-20
Figure 111 Phoenix set-up (Tx IQ Tuning windows)........................................................................................8-20
Figure 112 Spectrum analyzer screen shot when performing IQ tuning, part 1 (example).........................8-21
Figure 113 Spectrum analyzer screen shot when performing IQ tuning, part 2...........................................8-22
Figure 114 Helgo..................................................................................................................................................8-30
Figure 115 Troubleshooting diagram: Synthesizer..........................................................................................8-31
Issue 1
Table of Contents
COMPANY CONFIDENTIAL
Copyright © 2005 Nokia. All rights reserved.
Nokia Customer Care
Page 8 -3