Nokia 6020b Service Manual

Issue 1 03/2005

COMPANY CONFIDENTIAL

51

Copyright © 2005 Nokia. All Rights Reserved.

RM-31
3 - Service Software and Tuning Instructions

Nokia Customer Care

The new tuning values are highlighted  in the column <Measured Level Difference (dB)>. 

Note the limits as specified in the table below. 

Press Save & Continue

Tune the band filters and save its compensation values to the phone memory for each GSM 
band as described above.

Limits:

The tuned values <Measured Level Difference (dB)> shall not exceed the low and high limits 
as specified in the table below.

The typical value in the middle of each GSM band shall be approx. 0 dB, if <Rx Calibration> 
was made correctly in the calibration procedure before. 

In the following, the calibration of the Rx channel select filter (BB-filter) inside the RF-ASIC is 
described. It is performed by internal measuring of a proto-type filter. For this reason, the cali-
bration 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

First

118

497

497

-6.0 dB

+2.0 dB

N1

128

512

512

-3.0 dB

+2.0 dB

N2

140

535

537

-3.0 dB

+2.0 dB

N3

172

606

586

-3.0 dB

+2.0 dB

N4

190

700

661

-2.0 dB

+2.0 dB

N5

217

791

736

-3.0 dB

+2.0 dB

N6

241

870

794

-3.0 dB

+2.0 dB

N7

251

885

810

-3.0 dB

+2.0 dB

Last

261

908

835

-6.0 dB

+2.0 dB