RH-37
Service Sofftware and Tuning Instructions
Nokia Custome Care
Page 54
Nokia Corporation
Issue 1 07/04
RX channel select filter calibration
In the following, the calibration of the Rx channel select filter (BB-filter) inside the FR-
ASIC is described. It is performed by internal measuring of a proto-type filter. For this
reason, the calibration has to be done only once. No RF signal generator is needed. No
GSM band has to be selected in Phoenix.
Rx channel select filter calibration is always the first tuning in the tuning sequence.
Set the operating mode to local mode.
Select
Tuning
Alt-U
Rx Channel Select Filter
Calibration Alt-H
The setup should now look like this:
Channel Number
(as indicated in the < Rx Band Filter Response Compensation >
window)
Limits
(of < Measured Level
Difference >)
Meas. point
GSM900
GSM1800
GSM1900
Low
High
First
965
497
497
-6.0 dB
+2.0 dB
N1
975
512
512
-3.0 dB
+2.0 dB
N2
987
535
537
-3.0 dB
+2.0 dB
N3
1009
606
586
-3.0 dB
+2.0 dB
N4
37
700
661
-2.0 dB
+2.0 dB
N5
90
791
736
-3.0 dB
+2.0 dB
N6
114
870
794
-3.0 dB
+2.0 dB
N7
124
885
810
-3.0 dB
+2.0 dB
Last
136
908
835
-6.0 dB
+2.0 dB
