Nokia RH-37 Series Service Software And Tuning Instructions page 65

Nokia Custome 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 marker 1 must exceed 40dB.
The spectrum analyzer now shows a plot like this:
Ref Lvl Ref Lvl
35 dBm 35 dBm
35
21 dB Offset
30
20
10
0
-10
-20
-30
-40
-50
-60
-65
Center 897.4 MHz
Date:
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.
Issue 1 07/04
Marker 1 [T1]
25.82 dBm
897.33229000 MHz
1
24.OCT.2002 16:30:27
Nokia Corporation
Service Sofftware and Tuning Instructions
RBW 3 kHz RF Att
VBW 3 kHz Mixer
SWT 3 s Unit
1 [T1]
897.33229000 MHz
2 [T1]
897.40000000 MHz
3 [T1]
897.46771000 MHz
3
2
30 kHz/
RH-37
30 dB
-20 dBm
dBm
25.82 dBm
A
LN
-21.06 dBm
-11.52 dBm
1MA
F2
F1
Span 300 kHz
Page 65