Sony UWP-V1 Service Manual page 40

Connections
. For connecting the DC power supply, refer to step
"3. Connecting the DC power supply" in Section 2-2-2.
. For the connection to the MIC IN connector (CN2), refer
to the section "4. Reference Frequency Deviation
Adjustment".
MB-1137 board (B side)
CN101
MM-SMA conversion connector
and
SMA-BNC conversion connector
AF
RF IN OUT
Modulation
analyzer
Procedure
1. Connect the audio analyzer (distortion analyzer) to the
AF OUT connector for the modulation analyzer.
2. Set the audio analyzer to distortion measurement
(DISTORTION mode).
3. Input 1 kHz, _60 dBV (_57.8 dBm) signal to the MIC
INPUT connector from audio analyzer (oscillator).
(0 dBV = 1 Vrms)
4. Check that the distortion analyzer reading is less than
1.0%.
5. Input 1 kHz, _23 dBV (_20.8 dBm) signal to the MIC
INPUT connector.
6. Check that the distortion analyzer reading is less than
1.0%.
2-20
CN2
Oscilloscope
Distortion
analyzer
Oscillator
Audio analyzer
Level meter
7. S/N Check
Equipment and Tools
. DC power supply
DC output voltage : +3.0 ± 0.1Vdc
. DC ammeter
. Audio analyzer
. Modulation analyzer
MEASUREMENT
MEASUREMENT RANGE : ± 40 kHz
HPF
LPF
DE EMPHASIS
. Oscilloscope
. MM-SMA conversion connector
(SONY Part No. J-6402-490-A)
. SMA-BNC conversion connector
(SONY Part No. J-6402-480-A)
Switch and Control Setting
MB-1137 board
Transmission channel
U30 model ; 32-01 channel (578.125 MHz)
U42 model ; 42-01 channel (650.125 MHz)
CE62 model ; Group 00, 63-32 channel (810.000 MHz)
CE67 model ; Group 00, 68-32 channel (850.000 MHz)
KR model ; 60-01 channel (746.125 MHz)
Attenuation setting :
Accumulated time setting : "00 : 00"
n
Take note of the settings before starting the confirmation
work.
After confirmation is completed, return the settings to
the original setting before change.
Connections
. Same as "6. Distortion Ratio Check".
. For connecting the DC power supply, refer to step
"3. Connecting the DC power supply" in Section 2-2-2.
Procedure
1. Connect the audio analyzer (level meter) to the AF OUT
connector for the modulation analyzer.
2. Set the modulation analyzer.
3. Input 1 kHz, _60 dBV (_57.8 dBm) signal to the MIC
INPUT connector from audio analyzer (oscillator).
(0 dBV = 1 Vrms)
4. Set the audio analyzer to S/N measurement (with A-
weighting filter).
5. Check that the S/N reading is more than 30 dB.
n
Perform the checking with the MIC INPUT connector
short-circuit.
: FM
: 50 Hz
: 15 kHz or 20 kHz
: 50 usec
0 dB
UWP Series