Nokia N72 Service Manual page 199

RM-180
RF Troubleshooting and Tuning Guide
Context
On each GSM Rx band, there is a band rejecting filter in front of an RF ASIC front end. The amplitude ripple
caused by these filters causes ripple to the RSSI measurement and therefore calibration is needed.
The calibration has to be repeated for each GSM band.
Steps
1. Connect the GSM connector of the module jig to a signal generator.
Phoenix service software.
2. Start
3. Choose File Scan Product.
4. From the Operating mode drop-down menu, set mode to Local.
5. Select GSM900 band.
6. Choose Tuning→GSM→Rx Band Filter Response Compensation.
Tuning mode drop-down menu, select Manual.
7. From the
8. Click Start.
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