User Guide

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Rx band filter response compensation (GSM)

Prerequisites

Rx Calibration must be performed before the Rx Band Filter Response Compensation.

Context

On each GSM Rx band, there is a band rejecting filter in front of the LNA (Low Noise Amplifier). In RM-100, the

filter is integrated in RF ASIC N7500. 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 module jig’s GSM connector to the signal generator.

2. From the "Operating mode" dropdown menu, set mode to "Local".

3. Select GSM900 band.

RM-100

Nokia Customer Care RF Troubleshooting and Manual Tuning Guide

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