User Guide

Table of Contents
Introduction to RF troubleshooting..........................................................................................................................................7–5
RF troubleshooting for service....................................................................................................................................................7–5
Auto tuning.......................................................................................................................................................................................7–6
RX manual tuning............................................................................................................................................................................7–6
Calibrating RX Channel Select Filter.....................................................................................................................................7–6
RX calibration.............................................................................................................................................................................7–7
RX band filter response compensation (GSM)................................................................................................................7–10
TX manual tuning.........................................................................................................................................................................7–13
TX power level tuning (GSM)...............................................................................................................................................7–13
Tuning TX/IQ.............................................................................................................................................................................7–18
RX troubleshooting......................................................................................................................................................................7–24
RX 900.........................................................................................................................................................................................7–24
RX 1800......................................................................................................................................................................................7–25
RX 1900......................................................................................................................................................................................7–26
TX troubleshooting......................................................................................................................................................................7–27
TX 900 GMSK troubleshooting.............................................................................................................................................7–27
TX 1800/1900 troubleshooting..........................................................................................................................................7–29
RF engine troubleshooting........................................................................................................................................................7–31
N500 Helgo...............................................................................................................................................................................7–31
Synthesizer................................................................................................................................................................................7–32
List of Tables
Table 10 RX calibration settings.................................................................................................................................................7–8
Table 11 RX band filter response tuning values.................................................................................................................7–12
Table 12 TX power tuning targets...........................................................................................................................................7–16
Table 13 TX power level tuning coefficient values............................................................................................................7–17
Table 14 Spectrum analyzer settings.....................................................................................................................................7–18
Table 15 RF Control window settings.....................................................................................................................................7–21
List of Figures
Figure 100 RX Channel Select Filter Calibration.....................................................................................................................7–7
Figure 101 RX calibration (Example).........................................................................................................................................7–8
Figure 102 RX calibration with band EGSM900 (Example).................................................................................................7–9
Figure 103 RX calibration values (Example)...........................................................................................................................7–9
Figure 104 TX power level tuning window (example).....................................................................................................7–16
Figure 105 RF controls.................................................................................................................................................................7–19
Figure 106 Tx IQ tuning..............................................................................................................................................................7–20
Figure 107 Phoenix set-up (Tx IQ Tuning windows).........................................................................................................7–21
Figure 108 Spectrum analyzer screen shot when performing IQ tuning, part 1......................................................7–22
Figure 109 Spectrum analyzer screen shot when performing IQ tuning, part 2......................................................7–23
Figure 110 RX 900.........................................................................................................................................................................7–24
Figure 111 RX 1800......................................................................................................................................................................7–25
Figure 112 RX 1900......................................................................................................................................................................7–26
Figure 113 Troubleshooting TX 900 GMSK, part 1..............................................................................................................7–27
Figure 114 Troubleshooting TX 900 GMSK, part 2..............................................................................................................7–28
Figure 115 Troubleshooting TX 1800/1900, part 1............................................................................................................7–29
Figure 116 Troubleshooting TX 1800/1900 GMSK, part 2................................................................................................7–30
Figure 117 N500 Helgo...............................................................................................................................................................7–31
RM-13/33
RF Troubleshooting and Tuning Nokia Customer Care
9240218 (Issue 1) Company Confidential Page 7–3
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