RF manual tuning guide
Required manual tunings after component changes
Important: After RF component changes, always use autotuning. Manual tunings are only required
in rare cases.
If, however, manual tuning is used, only relevant tunings should be performed. Refer to the following table:
Changed component Perform following tunings
Tx RF ASIC RF Channel Filter Calibration, Tx IQ Tuning, Tx Power
Level Tuning, Temperature Sensor Calibration
RX RF ASIC RF Channel Filter Calibration, Rx Calibration, Rx Band
Filter Response Compensation, Rx AM Suppression
Any component in the GSM TX RF chain before the
PA
Tx IQ Tuning, Tx Power Level Tuning
Any component in the GSM TX RF chain after the PA
or PA
Tx Power Level Tuning
Any component in the GSM RX chain Rx Calibration, RX Band Filter Response
Compensation, RX AM Suppression
VCTCXO Rx Calibration
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.
Table 11 RF channel filter calibration tuning limits
Min Typ Max
Tx filter 0 5 31
Rx filter 0 11 31
RM-180
Nokia Customer Care RF Troubleshooting and Tuning Guide
Page 7 –18 COMPANY CONFIDENTIAL Issue 1
Copyright © 2006 Nokia. All rights reserved.
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