System Mode Independent Manual Tunings; Rf Channel Filter Calibration; Pa (Power Amplifier) Detection - Nokia n81 Service Manual

RM-179; RM-223
RF troubleshooting
2 To go to autotune, select
3 Remember to set the correct attenuation values before autotuning.
4 To start autotuning, click the

System mode independent manual tunings

RF channel filter calibration

Context
Rf channel filter calibration tunes the internal low pass filters of the RF ASIC, that limit the bandwidth of BB
IQ signals.
Tx filter
RX mixer
Rx filter
Steps
1. From the Operating 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.
Rf Channel Filter Calibration window, click Close.
5. To close the
Results

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.
Issue 1
Tuning (Alt-U) > Auto-Tune (Alt-A) from the menu.
Tune button.
Table 5 Rf channel filter calibration tuning limits
Min
0
0
0
Figure 39 Rf channel filter calibration typical values
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Typ
10
13
16
Max
31
31
31
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