Sony SPP-SS964 Service Manual page 19

–5
–6
–4
–7
18dB
–3
–2
–8
–9
[Check Center Frequency]
Measuring process
• Setting Spectrum analyzer:
Center frequency : 903.6 MHz (CH1)
RBW : 10 kHz
VBW : 10 kHz
Span : 1 MHz
• Setting Test mode:
Continuous Transmit mode (CH1 High Power)
(Refer to "Test Mode" on page 16)
• Measurement:
Measure transmitting wave f
(Refer Fig.5)
• Specification:
903.6 MHz ± 27 kHz
• Center Frequency:
10dB/
f
f
–2
[Confirm Transmitting output]
Measuring process
• Setting Spectrum analyzer:
Center frequency : 903.6 MHz (CH1)
RBW : 1 MHz
VBW : 100 kHz
Span : 5 MHz
• Setting Test mode:
Continuous Transmit mode (CH1 High Power)
(Refer to "Test Mode" on page 16)
3
4
5
7
–1
6
1
2
8
9
Fig. 4
(Formula of center frequency)
0
Tr-A
PN
f
1
f
–1
2
f
0
Fig. 5
• Measurement:
Measure peak level by Spectrum analyzer.
REF .0 dBm AT 10 dB
PEAK
LOG
10
dB/
PLOTTER ADRS
0
WA SB
SC FC
CORR
CENTER 903.600 MHz
RES BW 1.0 MHz
DATA
NO HANDSET
HIGH MID
1 –3.93 –20.95
2 –3.70 –20.36 –33.75
3 –4.47 –21.48 –34.78
4 –4.64 –21.85 –35.12
5 –4.52 –21.18 –35.54
6 –4.02 –21.57 –35.12
7 –5.03 –22.14 –35.45
8 –5.58 –22.35 –35.61
9 –4.03 –21.32 –35.82
10 –4.43 –19.69 –33.92
×
–4.435 –21.29 –34.96
σ
0.5336 0.7634 0.6747
× + 4σ –2.301 –18.24 –32.27
× – 4σ
–6.569 –24.34 –37.66
• Specification:
HANDSET MIN –17 dBm
(at High power: Include location loss)
BASE SET MIN –18 dBm
(at High power: Include location loss)
– 19 –
MKR 903.587 MHz
–3.67 dBm
SPAN 5.000 MHz
VBW 100 kHz SWP 20.0 msec
(UNIT; dbm)
BASESET
LOW HIGH MID
-34.53 –2.36 –19.17 –32.81
–1.52 –18.33 –30.79
–4.36 –18.65
–4.25 –19.37 –33.05
–2.35 –19.05 –32.95
–2.96 –19.14 –33.45
–4.12 –19.12 –33.01
–2.89 –18.56 –32.12
–5.01 –18.33 –32.41
–2.74 –17.28 –31.33
–3.256 –18.7 –32.52
1.0562 0.5895 0.8273
0.9687 –16.34 –29.21
–7.481 –21.06 –35.83
LOW
–33.3