Nokia N72, Руководство по обслуживанию

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Steps
1. From the System mode drop-down menu, set mode to Local.
2. Choose Tuning
→
RF Channel Filter Calibration .
3. Click Tune.
4. To save the values to the PMM (Phone Permanent Memory) area, click Write.
5. To close the
Rf Channel Filter Calibration
window, click Close.
Results
Figure 65 RF channel filter calibration typical values
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.
Temperature sensor calibration
Context
There is a temperature sensor integrated into one of the device ASICs. The ASIC provides DC-voltage, which
is temperature dependent.
Temperature sensor calibration is done in room temperature, in which offset caused by the ASIC variation
and AD-converter are nullified.
The module is able to do this calibration by itself, no external equipment is needed.
The temperature of the module and components must be 23 +/-2 degrees.
Steps
1. From the Operating mode drop-down menu, set mode to Local.
2. Choose Tuning
→
Temperature Sensor Calibration .
RM-180
RF Troubleshooting and Tuning Guide Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 7 –19
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