Technicolor - Thomson STUDIO CAMERA LDK 20(S) - Manual (Page 67)

Adjustments Technical Manual LDK 20(S) - Studio Camera 4-41
Encoder Board PAL
Burst amplitude
19. Adjust the burst amplitude potentiometer to obtain a burst amplitude of 300mV.
Measure at: Adjust with: Required result: Correct:
CVBS out ZR210 300mV
0%
10
90
100
0.1V 2µS
VA+300mV
Burst timing
20. Observe waveform monitor or oscilloscope and adjust the burst position so that it is 5.6µS from the leading
edge of the line synchronisation.
Measure at: Adjust with: Required result: Correct:
CVBS out ZR209
0%
10
90
100
50mV 1µS
t+5.6µs 178kHz
Genlock free-running preset
21. Remove genlock signal from camera.
22. Turn lock range potentiometer ZR215 fully counterclockwise.
23. Observe colour monitor, waveform monitor or vectorscope and adjust oscillator preset potentiometer.
Measure at: Adjust with: Required result:
CVBS out ZR216 Minimum freerunning speed
Sc-H phase relationship
24. Switch vectorscope to internal synchronisation.
25. Adjust Sc-H phase potentiometer for 180°.
Measure at: Adjust with: Required result: Correct:
CVBS out ZR217
20
40
R
60
80
0.7 100
120
20
43 0.3
g
YL
MG
cy
b
B yl
G
r CY
mg
75
100
U
V
0
0
5
-5
% VOLT
26. Switch off power and return encoder board to its position in the camera.