Nokia RH-6 Series Rf Description & Troubleshooting page 74

RH-6
7 - RF Description & Troubleshooting
The Spectrum Analyzer now shows a plot like this:
-10
-20
-30
-40
-50
-60
-65
Date:
Check the results in the TX IQ Tuning Window against the limits:
Value
Amplitude difference
Phase difference
Select in the TX IQ tuning window:
Select
Press
and the values are stored in the phone. The GSM1800 TX IQ Tuning is now finished.
Note: The optimum values for "TX I and Q Offset" and "Amplitude and Phase Differ-
ence" vary from phone to phone.
Page 74
Company Confidential
Marker 3 [T1]
Ref Lvl Ref Lvl -27.22 dBm
35 dBm 35 dBm 1.88006771 GHz
35
27.5 dB Offset
30
1
20
10
0
Center 1.88 GHz
15.JAN.2002 10:58:09
TX I DC offset
TX Q DC offset
Save to Product
Stop
Copyright © 2003 Nokia Corporation.
Company Confidential
CCS Technical Documentation
RBW 3 kHz RF Att
VBW 3 kHz
SWT 3 s Unit
3 [T1]
1.88006771 GHz
1 [T1]
1.87993229 GHz
2 [T1]
1.88000000 GHz
3
2
30 kHz/
Typical Limit min.
0.2 -6
-0.1 -6
0 -1
89.0 80
30 dB
dBm
-27.22 dBm
A
25.76 dBm
-27.30 dBm
1MA
Span 300 kHz
Limit max.
6
6
1
100
Issue 1 10/2003