System Mode Independent Manual Tunings - Nokia 6680 RM-36 Service Manual

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Changed component
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 WCDMA TX RF chain before the
PA
Any component in the WCDMA TX RX chain after the
PA, PA, power detector or PA switch mode power
supply
Any component in the GSM RX chain
Any component in the WCDMA RX chain
VCTCXO (G7501)

System mode independent manual tunings

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.
One common calibration is made for GSM and WCDMA.
Tx filter
Rx filter
Steps
1. From the "Operating mode" dropdown menu, set mode to "Local".
2. From the Tuning menu, choose "RF Channel Filter Calibration".
3. Click Tune.
4. To save the values to the PMM (Permanent Memory) area, click Write.
5. To close the tuning window, click Close.
Page 7–24
Table 11 RF channel filter calibration tuning limits
Min
0
0
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Copyright ©2005 Nokia. All Rights Reserved.
RF Troubleshooting and Manual Tuning Guide
Perform the following tunings
Tx IQ Tuning, Tx Power Level Tuning
Tx Power Level Tuning
Tx AGC & Power Detector, Tx Band Response
Calibration, Tx LO Leakage
Tx AGC & Power Detector, Tx Band Response
Calibration, PA Detection
Rx Calibration, RX Band Filter Response
Compensation, RX AM Suppression
Rx AGC Alignment, RX Band Response Calibration
Rx Calibration (GSM900 band)
Typ
10
16
RM-36
Max
31
31
Issue 1