Nokia 3600, 3620 Service Manual
CCS Technical Documentation
3 - Service Software
Company Confidential
NHM-10
Issue 2 01/2004
Copyright 2004 Nokia Corporation
Page 3-19
Company Confidential
The setup should now look like this:
Press Autotune and the optimal values are found.
Press Stop and a new window pops up:
Press Yes and the RX Channel Select Filter Calibration is finished.
RX Calibration (incl. VCXO Calibration)
The "RX calibration" is used to determine gain at different gain-settings for front-end
and Mjoelner and needs to be done in both bands.
and Mjoelner and needs to be done in both bands.
RX-calibration requires an external signal generator.
RX-calibration in EGSM850 combines two tunings, VCXO-calibration and AGC-calibra-
tion:
tion:
Calibration of GSM1900 band only determines AGC values.
The
VCXO-calibration finds out a calibration value for VCXO control, an AFC initial
value and 3 AFC-slope coefficients.