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:
CVBS out
Adjust with:
ZR209
Required result:
5.3µS
Correct: |
|
50mV | 1µS |
100 |
|
90 |
|
10 |
|
0% |
|
| t+5.3µs 178kHz |
5.3µs |
|
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
Measure at:
CVBS out
Adjust with:
ZR216
Required result:
Minimum free-
running speed
I/Q bar amplitude
27. Adjust the I and Q bars for an amplitude of 286mV (40 IRE).
Measure at:
CVBS out
CVBS out
Adjust with:
ZR207
ZR201
Required result:
Correct: |
|
|
| |
% |
|
|
| VOLT |
120 |
|
|
|
|
100 |
| R | cy | 0.7 |
80 | g |
| MG |
|
|
| V |
| |
|
|
|
| |
60 |
| 75 |
|
|
| YL | 100 | b | 5 |
40 |
|
| ||
|
| U | 0 | |
|
|
|
| |
20 | yl |
| B | |
|
|
|
| 0 |
20 |
| G | mg |
|
|
|
|
| |
43 |
| r | CY | 0.3 |
|
|
| ||
| I bar | Q bar |
| |
28. Switch off power and return encoder board to its position in the camera.
Adjustments | Technical Manual LDK 20(S) - Studio Camera |
