Gsm Rx Chain Activation For Manual Measurements/Gsm Rssi Measurement; Wcdma Rx Chain Activation For Manual Measurement - Nokia RM-626 Service Manual

RM-626
Cellular RF troubleshooting

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
Monitor
Phoenix:
Channel
RF frequency
Signal generator
frequency
Signal generator
RF level (CW
signal)
Results
RSSI level reading should reflect the level of the signal generator (- losses) +/- 5 dB.
The
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.
RX Control tool in Phoenix (Testing —> WCDMA —> RX Control) .
2. Activate
3. In the RX Control window, make the following settings:
Issue 1
GSM850
190 37
881.6 MHz 942.4 MHz
881.66771 MHz 942.46771 MHz
-60dBm -60dBm
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GSM900 GSM1800
700
1842.8 MHz
1842.86771 MHz
-60dBm
GSM1900
661
1960.0 MHz
1960.06771 MHz
-60dBm
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