Return Video Cable Compensation System; Return Video Carrier Frequency Adjustment; Return Video Deviation Adjustment 000 - Sony CCU-TX7 Service Manual

4-5. RETURN VIDEO Cable Compensation
System Adjustment
4-5-1. Return Video Carrier Frequency
Adjustment
Equipment : Spectrum analyzer
To be extended : CT-181 board
Preparation :
* Input 10 STEP signal (sub-carrier : OFF) of video signal
generator to RETURN-I connector (75 Q termination, 1.0
V p-p) on the CCU-TX7/TX7P rear panel.
Test point : TP21 (GND: E12)/CT-181 board
Adjusting point : @CV1 (RET FREQ)/CT-181 board ~
Specification —: 69.000 +0.005 MHz
SYNC
69.0MHz
CENT FREQ: 69.0MHz
FFEQ SPAN: 5.0MHz
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4-5-2. Return Video Deviation Adjustment
Equipment : Spectrum analyzer
To be extended : CT-181 board
Preparation :
* Input 10 STEP signal (sub-carrier : OFF) of video signal
generator to RETURN-1 connector (75 Q termination, 1.0
V p-p) on the CCU-TX7/TX7P rear panel.
Test point : TP21 (GND: E12)/CT-181 board
Adjusting point : @RV20 (RET DEV)/CT-181 board
Specification :T=2.000 0.005 MHz
T
69.0MHz
CENT FREQ: 69.0MHz
FFEQ SPAN: 5.0MHz
Note : Performe the adjustment of 4-5-1. "Return Video
Carrier Frequency Adjustment" when the SYNC
portion is moved during the adjustment.
PROMPT FREQ
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CCU-TX7 (E)\V1
CT-181 Board (A SIDE)
4-23