3-9
CCU-700A
CCU-700AP
3-3-9. VBS 1/2/3 OUT Level Adjustment
Rank
:
A
Equipment
:
Oscilloscope, Waveform monitor
To be extended
:
VA-156 board
Preparation
• BARS button/MSU-700
→
“ON”
Adjustment Procedure
• Perform adjustment in order of each channels.
VA-156 board
Test point/rear panel
Adj point
Specification
VBS 1 VBS 1 OUT
1
RV1602
[For NTSC]
VBS 2 VBS 2 OUT
1
RV1603
A = 100
±
1 IRE
VBS 3 VBS 3 OUT
1
RV1604
[For PAL]
A = 700
±
10 mV
(Note: Perform VBS 1 OUT Level Adjustment first.)
3-3-10. VBS 1/2/3 OUT Frequency Response
Adjustment
Rank
:
C
Equipment
:
Waveform monitor,Video signal
generator
To be extended
:
VA-156 board
Preparation
• S1(Y SEL)/VA-156
→
AUX
• BARS button/MSU-700
→
“OFF”
• Connect CCU-370 Checker to CN3/VA-156 board.
• Feed the H SWEEP signal of video signal generator to R
terminal.
Adjustment procedure
:
• Adjust the following controls nutil the specifications are
satisfied.
Test point/rear panel
Adjustment point
VBS1
VBS1 OUT
1
CV1501
VBS2
VBS2 OUT
1
CV1602
VBS3
VBS3 OUT
1
CV1603
(Note:Perform VBS1 OUT Frequency response Adjustment first.)
Specification
:
The waveform of from 100 kHz to 8
MHz portion shall be flat.
3-3. Video Signal System Adjustment
8 MHz
500 mV
250 to
350 mV
The waveform of from 100 kHz to
10 MHz portion shall be flat
A
A
[For NTSC]
[For PAL]
R
G
Å@
BNC
BNC
CCU-370 Checker
Terminated with 75
Ω
Connect video signal
generator