3-26
CCU-700A
CCU-700AP
3-4-8. Y DEMOD Carrier Balance Adjustment
Rank
:
B
Equipment
:
Oscilloscope
To be extended
:
DM-94 board
Preparation
• CLOSE button/MSU-700
→
“ON”
• S3 (Y 2nd AGC)/DM-94 board
→
“OFF”
Test point
:
TP11 (GND: E3)/DM-94 board
Adjustment Procedure
• Adjust
1
RV8 (Y CAR LEVEL)/DM-94 board so that
the signal level of V sample pulse is maximum.
Note:
After the adjustment, set as follows.
• S3 (Y 2nd AGC)/DM-94 board
→
“ON”
V
maximum
A
3-4-7. 22.5MHz Carrier Level Adjustment
Rank
:
B
Equipment
:
Oscilloscope
To be extended
:
DM-94 board
Test point
:
TP10 (GND: E5)/DM-94 board
Adjusting point
:
1
RV7 (Y CARR LEVEL)/DM-94
board
Specification
:
A = 400
±
20 mV p-p
(BW LIMIT/Oscilloscope
→
“OFF”)
3-4. Y Cable Compensation System Adjustment