RM-94
Nokia Customer Care 3 - Service Software and Tuning Instructions
60
COMPANY CONFIDENTIAL
Issue 1 04/2005
Copyright © 2005 Nokia. All Rights Reserved.
If a spectrum analyzer is used, make the following settings.
The spectrum analyzer now shows a plot like this:
The purpose of this alignment is to tune the carrier signal (at marker 2) and the +67kHz signal
(at marker 3) to a minimum level.
GSM900
Center Frequency
897.4 MHz
Frequency Span
300 kHz
Resolution Bandwidth
3kHz
Video Bandwidth
3kHz
Sweep Time
100 msec.
Sweep Type
Clear/Write
Detector Type
Max Peak
Reference level
35 dBm
Marker 1
897.33229 MHz
Marker 2
897.4 MHz
Marker 3
897.46771 MHz
Ref Lvl
35 dBm
Ref Lvl
35 dBm
RBW
3 kHz
VBW
3 kHz
SWT
3 s
RF Att
30 dB
30 kHz/
Center 897.4 MHz
Span 300 kHz
21 dB Offset
Mixer
-20 dBm
A
LN
1MA
Unit
dBm
-60
-50
-40
-30
-20
-10
0
10
20
30
-65
35
1
2
3
1 [T1] 25.88 dBm
897.33229000 MHz
2 [T1] -7.19 dBm
897.40000000 MHz
3 [T1] -11.55 dBm
897.46771000 MHz
Marker 1 [T1]
25.88 dBm
897.33229000 MHz
F1
o
F2
o
