Issue 1 04/2005
COMPANY CONFIDENTIAL
61
Copyright © 2005 Nokia. All Rights Reserved.
RM-94
3 - Service Software and Tuning Instructions
Nokia Customer Care
Use the variables 'TX I DC offset' and 'TX Q DC offset' to adjust the carrier signal to a minimum
level (marker 2). Tuning can be performed by using arrow keys on the keyboard. Pushing the
sliders by using the mouse is less sensitive however possible.
After tuning to the minimum the level difference between marker 2 and the peak levels at mark-
er 1 must exceed 40dB.
The spectrum analyzer now shows a plot like this:
Use the variables 'Amplitude difference' and 'Phase difference' to adjust the +67kHz signal to
a minimum level (Marker 3). Tuning can be performed by using the arrow keys on the keyboard.
Pushing the sliders by using the mouse is less sensitive however possible.
After tuning to the minimum, the level difference between marker 3 and the peak level at marker
1 must exceed 40dB.
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] 25.82 dBm
897.33229000 MHz
2 [T1] -21.06 dBm
897.40000000 MHz
3 [T1] -11.52 dBm
897.46771000 MHz
Marker 1 [T1]
25.82 dBm
897.33229000 MHz
F1
o
F2
o
