Nokia 6111 RM-82, Руководство по обслуживанию, Страница: 181 / 254

Table of Contents
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
RM-82
RF troubleshooting Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 8 –3
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