Sony UWP-V1, Service Manual

Page: 83 / 164

2-63
UWP Series
CN1
RF IN
AF
OUT
CN101
Level meter
Distortion
analyzer
Oscilloscope
Oscillator
Audio analyzer
Modulation
analyzer
MB-1094 board
(A side) MB-1094 board
(B side)
SMA-BNC
conversion
connector
MM-SMA
conversion
connector
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
MB-1094 board
Transmission channel
U30 model ; 32-01 channel (578.125 MHz)
U42 model ; 44-01 channel (650.125 MHz)
U6264 model ; 64-01 channel (770.125 MHz)
U6668 model ; 68-01 channel (794.125 MHz)
CE62 model
; Group 00, 63-32 channel (810.000 MHz)
CE67 model ; Group 00, 68-32 channel (850.000 MHz)
Attenuation setting : 0 dB
Accumulated time setting : “00 : 00”
MIC/LINE Select Switch (S1) : MIC
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 2-6-2.
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 28 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 2-6-2.
.
For the connection to the MIC 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
0.90%.
5. Input 1 kHz,
_
34 dBV (
_
31.8 dBm) signal to the AF
INPUT connector.
6. Check that the distortion analyzer reading is less than
3.2%.