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Context
In each GSM RX band, there is a band pass filter in front of Helgo 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 module jig's GSM connector to signal generator.
2.
From the dropdown menus, set "Operating mode" to Local, "System mode" to GSM, and Band to GSM900.
3.
From the Tuning menu, choose GSM -> Rx Band Filter Response Compensation.
4.
Check "Manual" and "Load from Phone" check boxes. Clear "Save to Phone" check box
5.
Click Start.
Page 8 –10
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RM-82
RF troubleshooting
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