User Guide

Figure 47 RM-198 RF key component placement

Receiver troubleshooting

Introduction to RX troubleshooting

Rx can be tested by making a phone call or in the local mode. For the local mode testing, use Phoenix service

software.

The main Rx troubleshooting measurement is RSSI measurement. This test measures the signal strength of

the received signal. I and Q branches can be measured separately.

In GSM, the input signal can be either a real GSM signal or a CW signal that is 67.771kHz up from the carrier

frequency.

For service tool usage instructions, refer to section Service Tools and Service Concepts.

RM-198

Nokia Customer Care RF Troubleshooting and Manual Tuning Guide

Page 7 –6 COMPANY CONFIDENTIAL Issue 1