Nokia 5800 - XpressMusic Smartphone - WCDMA, Руководство по обслуживанию

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2 To go to autotune, select
Tuning (Alt-U)
>
Auto-Tune (Alt-A)
from the menu.
3 Remember to set the correct attenuation values before autotuning.
4 To start autotuning, click the
Tune
button.
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.
Table 12 Rf channel filter calibration tuning limits
Min Typ Max
Tx filter 0 10 31
RX mixer 0 13 31
Rx filter 0 16 31
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.
5. To close the
Rf Channel Filter Calibration window, click Close.
Results
Figure 47 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.
RM-356
RF troubleshooting
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