Nokia 6020b Manuales De Servicio
RM-31
Nokia Customer Care 3 - Service Software and Tuning Instructions
62
COMPANY CONFIDENTIAL
Issue 1 03/2005
Copyright © 2005 Nokia. All Rights Reserved.
The spectrum analyzer now shows a plot like this:
Compare the results in the TX IQ Tuning Window with the limits below:
Repeat the IQ tuning for all bands and for all modes by following the instructions from Phoenix
IQ tuning. Always use the highest power level, otherwise a wrong Vbat value will be stored in
the phone memory.
IQ tuning. Always use the highest power level, otherwise a wrong Vbat value will be stored in
the phone memory.
Note: The optimum values for <TX I and Q Offset> and <Amplitude and Phase Difference> vary
from phone to phone.
from phone to phone.
Please be aware, that the frequency deviation in EDGE mode is 50 kHz, due to the 3 pi / 8
EDGE modulation.
EDGE modulation.
Value
Typical
Limit min.
Limit max.
TX I DC offset
0.1
-6
6
TX Q DC offset
0
-6
6
Amplitude difference
0
-1
1
Phase difference
87.5
78
102
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] 25.61 dBm
897.33229000 MHz
2 [T1] -22.44 dBm
897.40000000 MHz
3 [T1] -38.76 dBm
897.46771000 MHz
Date: 24.OCT.2002 16:33:46
Marker 1 [T1]
25.61 dBm
897.33229000 MHz
F1
o
F2
o