Nokia NEM-4 Series Troubleshooting Instructions page 131

CCS Technical Documentation
The Spectrum Analyzer now shows a plot like this:
Ref Lvl Ref Lvl
35 dBm 35 dBm
35
27.5 dB Offset
30
20
10
0
-10
-20
-30
-40
-50
-60
-65
Center 1.88 GHz
Date: 15.JAN.2002
The purpose of this tuning is to tune the carrier signal and the +67kHz signal to a mini-
mum level (Marker 2 and 3).
Use the variables 'TX I DC offset' and 'TX Q DC offset' to adjust the carrier signal to a
minimum level (Marker 2).
After tuning to the minimum the level difference between the peak levels at marker 1
and 2 must exceed 40dB.
Tuning is possible by using arrow keys on the keyboard. Pushing the sliders by using the
mouse is less sensitive but even possible.
Issue 1 09/2003
Company Confidential
Marker 3 [T1]
-12.20 dBm
1.88006771 GHz
1
30 kHz/
10:53:47
Copyright  2003 Nokia Corporation.
Company Confidential
RBW 3 kHz
VBW 3 kHz
SWT 3 s
3 [T1]
1 [T1]
2 [T1]
2
3
NEM-4
RF Troubleshooting
RF Att 30 dB
Unit dBm
-12.20 dBm
A
1.88006771 GHz
27.81 dBm
1.87993229 GHz
4.13 dBm
1.88000000 GHz
1MA
Span 300 kHz
Page 6(b)-127