User Guide

There is a band rejecting filter for each WCDMA Rx band between the front end LNA and the mixer of an RF

ASIC. The amplitude ripple caused by this filter causes ripple to the RSSI measurement and therefore Rx band

response calibration is needed.

The Rx band response calibration can be done in two different ways. If the signal generator used supports

frequency sweep table, the calibration can be done as a part of the Rx calibration. If there is no support for

the frequency sweep table , it is possible to calibrate all necessary frequencies one by one.

The first set of steps shows how to perform the calibration without the signal generator sweep feature. The

alternative steps give instructions how to perform the calibration if the signal generator supports frequency

sweeps, and the calibration can be performed within the Rx AGC calibration.

Steps

1. Connect the GSM connector of the module jig to a signal generator.

2. From the Operating mode drop-down menu, set mode to Local.

3. Choose Tuning→WCDMA→Rx Calibration .

4. Click Start and Tune.

RM-49

Nokia Customer Care RF Troubleshooting and Manual Tuning Guide

Page 7 –32 COMPANY CONFIDENTIAL Issue 1