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Changed component
Perform following tunings
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 (G7501)
Rx Calibration (GSM850 band)
RF channel filter calibration
Context
Rx channel filter calibration tunes Rx and Tx ASICs' internal low pass filters that limit the bandwidth of BB IQ
signals.
Table 13 RF channel filter calibration tuning limits
Min
Typ
Max
Tx filter
0
5
31
Rx filter
0
11
31
Steps
1. From the dropdown menus, set "System mode" to "Local".
2. From the Tuning menu, choose RF Channel Filter Calibration.
3. Click Tune.
4. Click Write.
Saves tuned values to the PMM area.
5. To close the tuning window, click Close.
Results
Figure 69 RF channel filter calibration typical values
Temperature sensor calibration
Context
There is a temperature sensor integrated into VINKU ASIC. VINKU provides DC-voltage, which is temperature
dependent.
RM-57/58
RF Troubleshooting and Manual Tuning Guide
Nokia Customer Care
Issue 1
Company Confidential
Page 7–19
Copyright ©2005 Nokia. All Rights Reserved.
Summary of Contents for RM-57
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