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Encoder Board PAL
Set-up
1. Switch off power. Place encoder board on service extender. Genlock camera with black burst signal. Switch
on power.
2. Connect oscilloscope via a vectorscope terminated with 75Ohm to the CVBS output of the camera.
3. Switch on colour bar.
Black balance
4. Turn chroma potentiometer R4 on encoder board fully clockwise (max. chroma).
5. Adjust the I and Q balance potentiometers for minimum unbalance in black.
Measure at:
Adjust with:
CVBS out
ZR203
ZR206
6. Turn chroma potentiometer R4 on encoder board fully counterclockwise (zero chrominance).
CVBS amplitude
7. Adjust the CVBS gain potentiometer to obtain an output amplitude of 700mV for Y.
Measure at:
Adjust with:
CVBS out
R14
R-Y amplitude
8. Turn R-Y gain potentiometer ZR205 fully clockwise.
9. Connect MP7 on the encoder board to ground.
10. Adjust with the chroma potentiometer until the colour vector dots correspond with the indication marks on the
V-axis of the graticule.
Measure at:
Adjust with:
CVBS out
R4
Adjustments
Required result:
Smallest possible
dot in centre of
vectorscope
Required result:
Correct:
700mV
100
90
10
0%
Required result:
Correct:
%
120
100
80
60
40
20
20
43
Technical Manual LDK 20(S) - Studio Camera
5µS
0.1V
VA+700mV
VOLT
cy
R
0.7
g
MG
V
75
100
5
YL
b
U
0
yl
B
-5
0
mg
G
r
CY
0.3
4-37
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