Gsm Rx Chain Activation For Manual Measurements / Gsm Rssi Measurement; Wcdma Rx Chain Activation For Manual Measurement - Nokia RM-42 Service Manual

RM-42
Nokia Customer Care RF Troubleshooting and Manual Tuning Guide
See Also
• WCDMA Rx chain activation for manual measurement (Page 7–12)

GSM Rx chain activation for manual measurements / GSM RSSI measurement

Context
RSSI signal measurement is the main Rx troubleshooting measurement. The test measures the strength of the
received signal.
I and Q branches can be measured separately. In GSM, the input signal can be either real GSM signal or CW signal
that is 67.771kHz up from the carrier frequency.
Steps
1. Start Phoenix service software.
2. From the Testing menu, choose GSM and RSSI Reading.
3. Setup RF signal generator for channel frequency +67.771kHz CW mode with –80dBm signal.
Alternatively set cellular tester downlink channel to the appropriate channel.
4. In the RSSI Reading window, select the appropriate band and channel.
Figure 62 RSSI Reading window
5. To start measurement/activate GSM Rx chain, click the Start button.
Results
RSSI reading values of the selected band and channel are displayed.

WCDMA Rx chain activation for manual measurement

Steps
1. Start Phoenix service software.
2. From the Testing menu, choose WCDMA and Rx Control.
Figure 63 Activating Rx Control window in Phoenix
Page 7–12 Company Confidential 9241872 (Issue 1)
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