Sony UWP-V1, Service Manual

Page: 28 / 164

2-8
UWP Series
RF
IN
AF
OUT
AF input
connector MIC / LINE
change switch
(S401 / RF-131 board)
CN301
RF-131 board
Oscilloscope
Modulation
analyzer
Audio analyzer
Level meter
MM-SMA conversion connector and
SMA-BNC conversion connector
Distortion
analyzer
Oscillator
7. S/N Check
Equipment and Tools
. DC power supply
DC output voltage :
+
3.0
±
0.1Vdc
.
DC ammeter
. Audio analyzer
. Modulation analyzer
MEASUREMENT : FM
MEASUREMENT RANGE :
±
40 kHz
HPF : 50 Hz
LPF : 15 kHz or 20 kHz
DE EMPHASIS : 50
u
sec
.
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
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)
MIC/LINE change switch
(S401/RF-131 board) :
MIC
Attenuation setting : 0 dB
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 2-1-2.
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 AF
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 AF INPUT connector
short-circuit.
Connections
. For connecting the DC power supply, refer to step
“3. Connecting the DC power supply” in Section 2-1-2.
.
For the connection to the AF IN connector (CN1), refer
to the section “4. Reference Frequency Deviation
Adjustment”.
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 AF
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 AF
INPUT connector.
6. Check that the distortion analyzer reading is less than
1.0%.