Rf Manual Tuning Guide; Required Manual Tunings After Component Changes; System Mode Independent Manual Tunings; Rf Channel Filter Calibration - Nokia N72 Service Manual

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RF manual tuning guide

Required manual tunings after component changes

Important:
in rare cases.
If, however, manual tuning is used, only relevant tunings should be performed. Refer to the following table:
Changed component
Tx RF ASIC
RX RF ASIC
Any component in the GSM TX RF chain before the
PA
Any component in the GSM TX RF chain after the PA
or PA
Any component in the GSM RX chain
VCTCXO

System mode independent manual tunings

RF channel filter calibration

Context
Rx channel filter calibration tunes the internal low pass filters of Rx and Tx ASICs, which limit the bandwidth
of BB IQ signals.
Tx filter
Rx filter
Page 7 –18
After RF component changes, always use autotuning. Manual tunings are only required
Table 11 RF channel filter calibration tuning limits
Min
0
0
COMPANY CONFIDENTIAL
Copyright © 2006 Nokia. All rights reserved.
RF Troubleshooting and Tuning Guide
Perform following tunings
RF Channel Filter Calibration, Tx IQ Tuning, Tx Power
Level Tuning, Temperature Sensor Calibration
RF Channel Filter Calibration, Rx Calibration, Rx Band
Filter Response Compensation, Rx AM Suppression
Tx IQ Tuning, Tx Power Level Tuning
Tx Power Level Tuning
Rx Calibration, RX Band Filter Response
Compensation, RX AM Suppression
Rx Calibration
Typ
5
11
RM-180
Max
31
31
Issue 1