Sony DWT-B30, Руководство по обслуживанию

Страница: 41 / 98

4-9 (E)
DWT-B30
Measurement procedure
(1) Remove the antenna from this unit and connect the RF adjustment cable to the output terminal.
(2) Connect this unit and spectrum analyzer.
(3) Set the transmission power to 2 mW.
(4) Turn on the power of this unit to enter the test mode. (Refer to Section 1-5.)
(5) Check that the frequency is masked at the following three points as specified below.
RANGE 0: L ch
RANGE 2: C ch
RANGE 4: H ch
For the setting of the frequency, refer to “Procedure to change frequency in the test mode” in this
section.
(6) Also, check the 10 mW and 25 mW levels in the same way.
Specification: Check that the frequency is masked in the range of FC
?
336 kHz as shown in the
illustration below.
5. Measurement of spurious
Required equipment
.
Spectrum analyzer
.
RF adjustment cable (J-6402-390-A)
Setting of measuring device
.
SPAN: 4 GHz (Start Freq: 0 Hz)
.
RBW, VBW: 300 kHz
.
LEVEL: 14 dBm (10 dBm only for J model)
.
TRACE: Peak HOLD
Measurement procedure
(1) Remove the antenna from this unit and connect the RF adjustment cable to the output terminal.
(2) Connect this unit and spectrum analyzer.
(3) Set the transmission power to 25 mW.
(4) Turn on the power of this unit to enter the test mode. (Refer to Section 1-5.)
(5) Check that the frequency (2 times, 3 times and 4 times the level of the transmission frequency) is
within specification in the following frequency RANGE.
RANGE 0: L ch
Specification:
_
30 dBm or less (L (J) and L (CE),
_
36 dBm or less for UC model)
dBC
0
10
20
30
40
50
60
70
80
90
100
FC 1MHz FC 1MHz FC 336 kHz FC 336 kHz
FC 96 kHz FC 96 kHz
FC