GSM RX chain activation for manual measurements/GSM RSSI measurement
Prerequisites
Connect a signal generator to a proper RF connector on the phone PWB (note: there are two antenna
connectors for cellular RF on the phone PWB, one for low bands and one for high bands).
Steps
1. Set the phone to local mode.
2. Activate GSM RSSI reading in Phoenix ( Testing → GSM → RSSI Reading )
3. Use the following frequrencies and RF levels in RF generator for different GSM bands:
Setting GSM850 GSM900 GSM1800 GSM1900
Phoenix:
Monitor
Channel
190 37 700 661
RF frequency 881.6 MHz 942.4 MHz 1842.8 MHz 1960.0 MHz
Signal generator
frequency
881.66771 MHz 942.46771 MHz 1842.86771 MHz 1960.06771 MHz
Signal generator
RF level (CW
signal)
-60dBm -60dBm -60dBm -60dBm
Results
The
RSSI level
reading should reflect the level of the signal generator (- losses) +/- 5 dB.
When varying the level in the range of -30 to -102 dBm, the reading should follow within +/-5 dB.
WCDMA RX chain activation for manual measurement
Steps
1. Set the phone to local mode.
2. Activate
RX Control
tool in Phoenix (Testing —> WCDMA —> RX Control) .
3. In the RX Control window, make the following settings:
RM-781
Cellular RF troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 4 – 25
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