Nokia Custome Care
Service Sofftware and Tuning Instructions
RH-37
Issue 1 07/04
Nokia Corporation
Page 65
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 marker 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 sig-
nal 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
Date: 24.OCT.2002 16:30:27
Marker 1 [T1]
25.82 dBm
897.33229000 MHz
F1
o
F2
o
