User Guide

6. Choose respective band, EGSM900, GSM1800 or GSM1900.

Press Start.

7. Follow the instructions for Signal generator set-up in the pop-up window.

Press OK.

Results

Read the SNR result. SNR should be > 18dB.

Check the sensitivity value.

The set-up should now look like this (the pop-up window also included in the picture for reference):

Measuring Rx module manually using oscilloscope and spectrum analyzer (EGSM900)

Context

Spectrum analyzer level values depend on the probe type and should be validated using a known good sample.

The levels that are given here are measured using a high frequency probe.

Measuring with an oscilloscope at test points RXI (J730) or RXQ (J731) ) and RXID (J261) or RXQD (J262) is

recommended only if RSSI reading does not provide enough information.

Steps

1. Start Phoenix Service software.

2. Establish connection to the phone.

From the File menu, choose Open Product.

From the list, choose RM-51.

3. From the Testing menu, choose RF Controls.

4. In the RF Controls window:

i Select Band EGSM900.

ii Set Active unit to RX.

iii Set Operation mode to Continuous.

iv Set RX/TX channel to 37.

v Set AGC to 12.

Set the frequency and level of the signal generator to 942.4677MHz and -60dBm.

Note: Because DC compensation does not work during continuous mode, DC offset level at RXI and

RXQ will gradually shift from the optimized level.

RM-51

Nokia Customer Care RF troubleshooting

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