User Guide

Issue 1 04/2005 COMPANY CONFIDENTIAL 51

RM-94

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.

RX channel select filter calibration

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

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