Measuring Rx Performance Using Snr Measurement - Nokia RM-51 Service Manual

RM-51
RF troubleshooting
4. In the RF Controls window:
• Select Band: GSM900/GSM1800/GSM1900.
• Set Active unit to Rx.
• Set Operation mode to Burst.
• Set Rx/Tx channel in the following way: EGSM900: 37, GSM1800: 700 and GSM1900:661.
5. From the Testing menu, choose RSSI Reading.
The setup now looks like this:
6. Apply a signal frequency of -80dBm at:
• EGSM900: 942.4677MHz (channel 37 + 67.7KHz offset)
• GSM1800: 1842.8677MHz (channel 700 + 67.7KHz offset)
• GSM1900: 1960.0677MHz (channel 661 + 67.7 KHz)
7. In RSSI reading, click Read now.
Results
The resulting RSSI level should be -80dBm in each band.

Measuring RX performance using SNR measurement

Context
Note: This measurement also provides an indication of the conducted sensitivity.
Steps
1. Start Phoenix Service Software
2. Establish connection to the phone.
From the File menu, choose "Open Product".
From the list, select RM-51.
3. From the Testing menu, choose RF Controls.
4. In the RF Controls window:
i Select Band: GSM900/GSM1800/GSM1900
ii Set Active unit to RX.
iii Set Operation mode to Burst
iv Set Rx/Tx channel in the following way: EGSM900: 37, GSM1800: 700 and GSM1900: 661
5. From the testing menu (T) select SNR measurement (M). Then select Both.
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