User Guide

The main RX troubleshooting measurement is RSSI reading. This test measures the signal strength of the
received signal. For GSM RSSI measurements, see GSM RX chain activation for manual measurements / GSM
RSSI measurement (page 4–8). For a similar test in WCDMA mode, see WCDMA RSSI measurement
(page 4–10).
GSM RX chain activation for manual measurements/GSM RSSI measurement
Prerequisites
Make the following settings in Phoenix service software:
Setting GSM850 GSM900 GSM1800 GSM1900
Phoenix Channel 190 37 700 661
Signal generator
to antenna
connector
881.66771MHz
(67.71kHz offset)
at -60dBm
942.46771MHz
(67.71kHz offset)
at -60dBm
1842.86771MHz
(67.71kHz offset)
at -60dBm
1960.06771MHz
(67.71kHz offset)
at -60dBm
Steps
1. Set the phone to local mode.
2. Activate RSSI reading in Phoenix (Testing→GSM→RSSI reading )
Results
The reading should reflect the level of the signal generator (-losses) +/- 5 dB.
When varying the level in the range -30 to -102 dBm the reading should then follow within +/-5 dB.
WCDMA RX chain activation for manual measurement
Prerequisites
Make the following settings in Phoenix service software:
Setting WCDMA I (2100) WCDMA V (850)
Phoenix channel 10700 4408
Signal generator to antenna connector 2141.0 MHz 882.6 MHz
RM-244
RF troubleshooting
Page 4 –8 COMPANY CONFIDENTIAL Issue 1
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