RH-37
Service Sofftware and Tuning Instructions
Nokia Custome Care
Page 50
Nokia Corporation
Issue 1 07/04
Otherwise continue Rx calibration according to the tuning steps 2 and 3 for GSM1800
respectively GSM1900 bands. Note the limits of the calibration mentioned in the list
above.
Pop up window for Rx calibration of GSM1800 band
Calibration fails and possible reasons:
• If the whole calibration fails, the low band receiver chain (GSM850 or GSM900)
or the synthesizer part (including reference oscillator) might be defective.
• If Rssi3 and Rssi6 are within the limits, all other Rssi values are valid, too. If one
of them or both are out of limits, the low band receiver part has to be checked.
• If AFC value or AFC slope fails, but the Rssi values are within the limits, the
VCTCXO G7501 or UEM D200 might be defective.
RX band filter response compensation
This alignment is necessary to compensate the frequency response of the RX band filters
(SAW filters).
Rx band filter response compensation GSM900, GSM1800 and GSM1900
Manual tuning
Open the window <Rx Band Filter Response Compensation> in Phoenix Service Software
as follows:
Select
Tuning
Alt-U
Rx Band Filter Response
Compensation
Alt-C
Phoenix automatically selects the low band.
Select
Tuning mode Manual (Radio Button)
Connect an RF signal generator to the antenna port of the test jig respectively the phone.
