5-67
3-4.
VIDEO SYSTEM ADJUSTMENTS
Before perform the video system adjustments, check that the
specified value of “27MHz Origin Oscillation Adjustment” of
“CAMERA SYSTEM ADJUSTMENT” is satisfied.
3-4-1. Base Band Block Adjustments
1. Chroma BPF f
0
Adjustment (VC-242D board)
Set the center frequency of IC1301 chroma band-pass filter.
Mode
Camera
Subject
All black
(Cover the lens with the lens cap)
Measurement Point
CH1: Chroma signal terminal of
S VIDEO jack (75
Ω
terminated)
CH2: Y signal terminal of S VIDEO
jack (75
Ω
terminated)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
28
Specified Value
A = 100mVp-p or less
B = 200mVp-p or more
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
Check that the burst signal (B) is
output to the chroma signal
terminal of S VIDEO jack.
3
3
0C
04
Set the data, and press PAUSE
button.
4
C
28
Change the data for minimum
amplitude of the burst signal
level (A).
(The data should be “00” to
“07”.)
5
C
28
Press PAUSE button.
6
3
0C
00
Set the data, and press PAUSE
button.
7
Check that the burst signal level
(B) satisfies the specified value.
8
0
01
00
Set the data.
2. S VIDEO OUT Y Level Adjustment (VC-242D board)
Mode
Camera
Subject
Arbitrary
Measurement Point
Y signal terminal of S VIDEO jack
(75
Ω
terminated)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
25
Specified Value
A = 1000 ± 14mV
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
2
35
Note down the data.
3
2
35
01
Set the data.
4
3
0C
02
Set the data, and press PAUSE
button.
5
C
25
Change the data and set the Y
signal level (A) to the specified
value.
6
C
25
Press PAUSE button.
7
3
0C
00
Set the data, and press PAUSE
button.
8
2
35
Set the data that is noted down at
step 2.
9
0
01
00
Set the data.
CH1
CH2
A
H
CH1
H
B
When the data of page: 3, address: 0C, is 04:
When the data of page: 3, address: 0C, is 00:
Fig. 5-3-7.
H
Center of luminance line
A
Fig. 5-3-8.
Содержание DVCAM DSR-PD150
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