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Rx AM suppression (GSM)

Context

AM suppression is related to ability of the receiver to operate when there is a disturbing AM modulated signal

near the received channel signal frequency.

AM suppression is not tunable, it is only a check. In Rx AM suppression, a continuous useful signal accompanied

with an AM modulated signal 10 MHz above the current channel is fed to the antenna and RSSI value is read.

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. From the Tuning menu, choose GSM -> Rx AM Suppression.

RM-208

Nokia Customer Care RF Troubleshooting and Manual Tuning Guide

Page 7 –26 COMPANY CONFIDENTIAL Issue 1