Nokia RH-37 Series Service Software And Tuning Instructions page 66

RH-37
Service Sofftware and Tuning Instructions
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: 24.OCT.2002
Compare the results in the TX IQ Tuning Window with the limits below:
Value
TX I DC offset
TX Q DC offset
Amplitude difference
Phase difference
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.
Note: The optimum values for <TX I and Q Offset> and <Amplitude and Phase Difference> vary
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.
Page 66
Marker 1 [T1]
25.61 dBm
897.33229000 MHz
1
2
30 kHz/
16:33:46
Typical
0.1
0
0
87.5
Nokia Corporation
Nokia Custome Care
RBW 3 kHz RF Att
VBW 3 kHz Mixer
SWT 3 s Unit
1 [T1] 25.61 dBm
897.33229000 MHz
2 [T1] -22.44 dBm
897.40000000 MHz
3 [T1] -38.76 dBm
897.46771000 MHz
3
Span 300 kHz
Limit min. Limit max.
-6 6
-6 6
-1 1
80 100
30 dB
-20 dBm
dBm
A
LN
1MA
F2
F1
Issue 1 07/04