In WCDMA mode, the voltage levels should be:
•
0.4…0.8 V @ Start level 0 dBm
•
0.8…1.3 V @ Start level 10 dBm
•
3.0…4.2 V @ Start level 24 dBm
In GSM mode, the voltage levels should be:
•
0.1…0.5 V @ GSM 900 & Tx Power Level 19
•
0.5…1.1 V @ GSM 900 & Tx Power Level 12
•
3.5…4.3 V @ GSM 900 & Tx Power Level 5
Note:
The VPA signal is continuously on when WCDMA TX is activated, but has a pulsed nature in
GSM TX mode (the signal is on only when a GSM TX burst is transmitted).
Note:
The VPA signal is not tested by ST_CDSP_RF_SUPPLY_TEST.
RF tuning and testing
RF auto tuning and testing with Nokia Care Suite
Introduction to cellular RF tunings
RM-626 cellular RF engine has been tuned correctly in production. There is no reason to do re-calibration
unless one or more of the RF components are changed or memory (D3000) is corrupted.
RM-626 can be tuned automatically. Auto tuning is designed to align the phone's RF part easily and faster. It
performs calibrations, tunings and measurements of RX and TX. The results are displayed and logged in a
result file, if initiated.
Note:
Always perform RF tuning with the help of the module jig MJ-271, never with RF couplers.
Using an RF coupler in the tuning phase will cause a complete mistuning of the RF part.
Important:
After RF component changes, always perform cellular RF auto tuning.
RM-626
Cellular RF troubleshooting
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COMPANY CONFIDENTIAL
Issue 1
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