Pa (Power Amplifier) Detection; Gsm Receiver Tunings; Rx Calibration (Gsm) - Nokia RM-235 Service Manual

RM-235
RF troubleshooting

PA (power amplifier) detection

Context
The PA detection procedure detects which PA manufacturer is used for phone PAs.
If a PA is changed or if the permanent memory (PMM) data is corrupted, PA detection has to be performed
before Tx tunings.
Steps
1. From the Operating mode drop-down menu, set mode to Local.
2. Choose Tuning→PA Detection .
3. Click Tune.
4. Check that the detected PA manufacturers are corresponding to the actual chips on the board.
5. To end the procedure, click Close.

GSM receiver tunings

Rx calibration (GSM)

Context
Rx Calibration is used to find out the real gain values of the GSM Rx AGC system and tuning response of the
AFC system (AFC D/A init value and AFC slope)
Steps
1. Connect the GSM connector of the module jig to a signal generator.
Phoenix service software.
2. Start
3. From the Operating mode drop-down menu, set mode to Local.
4. Choose Tuning→GSM→Rx Calibration .
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