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Encoder Board NTSC
Burst timing
23. Observe waveform monitor or oscilloscope and adjust the burst position so that it is 5.3µS from the leading
edge of the line synchronisation.
Measure at:
Adjust with:
CVBS out
ZR209
Genlock free-running preset
24. Remove genlock signal from camera.
25. Turn lock range potentiometer ZR215 fully counterclockwise.
26. Observe colour monitor, waveform monitor or vectorscope and adjust oscillator preset potentiometer for
minimum free-running.
Measure at:
Adjust with:
CVBS out
ZR216
I/Q bar amplitude
27. Adjust the I and Q bars for an amplitude of 286mV (40 IRE).
Measure at:
Adjust with:
CVBS out
ZR207
CVBS out
ZR201
28. Switch off power and return encoder board to its position in the camera.
Adjustments
Required result:
Correct:
5.3µS
100
90
10
0%
Required result:
Minimum free-
running speed
Required result:
Correct:
I-bar amplitude
%
120
100
Q-bar amplitude
80
60
40
20
20
43
I bar Q bar
Technical Manual LDK 20(S) - Studio Camera
50mV
1µS
t+5.3µs 178kHz
5.3µs
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
4-49
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