Sony UWP-V1, Service Manual

Page: 29 / 164

2-9
UWP Series
6. Set the SENSITIVITY on the audio analyzer (level
meter) so that the audio analyzer (level meter) reads 0 dB.
7. Switch the oscillation frequency for the audio analyzer
(oscillator) from 1 kHz to 100 Hz.
8. Check that audio analyzer (level meter) reading is
_
1
±
2 dB.
9. Switch the oscillation frequency for the audio analyzer
(oscillator) from 100 Hz to 15 kHz.
10. Check that the reading for the audio analyzer (level
meter) is + 3
±
2 dB.
9. Tone Signal Adjustment
Equipment and Tools
. DC power supply
DC output voltage :
+
3.0
±
0.1Vdc
.
DC current meter
. Frequency counter
. Spectrum analyzer
.
Modulation analyzer
.
RF adjusting cable (SONY part No. 7-721-052-81)
. 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)
Attenuation setting : 0 dB
Accumulated time setting : “00 : 00”
n
Note down the setting position before the adjustment.
After the Adjustment complete, set the original position.
8. Frequency Characteristics 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. Set the audio analyzer to level meter mode.
4. Input 1 kHz, _ 60 dBV ( _ 57.8 dBm) signal to the AF
INPUT connector from audio analyzer (oscillator).
5. Check the indication on the audio analyzer (level meter).