Nokia 6680 RM-36 Service Manual page 213

RM-36
RF Troubleshooting and Manual Tuning Guide Nokia Customer Care
Results
Figure 75 RF channel filter calibration typical values
PA (power amplifier) detection
Context
PA detection procedure detects which PA manufacturer is used for GSM and WCDMA PAs.
If 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" dropdown menu, set mode to "Local".
2. From the Tuning menu, choose "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 VINKU ASIC. VINKU provides DC-voltage, which is temperature
dependent.
Temperature sensor calibration is done in room temperature, in which offset caused by VINKU variation and
AD-converter inside RETU 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" dropdown menu, set mode to "Local".
2. From the Tuning menu, choose "Temperature Sensor Calibration".
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