Technicolor - Thomson LDK 20(S) Gain Video, White limiter, Output amplitude readjustment

Digital Video Processor

Gain Video

1.Place Digital Video Processor on service extender.

2.Switch off colour bar and Test sawtooth on.

3.Adjust white output amplitude.

Measure at: X51-21 (R)

X51-11 (G)

X51-22 (B)

Adjust with: ZR232 (R)

ZR432 (G) ZR632 (B)

Required result: +1400mV (R)

+1400mV (G) +1400mV (B)

Correct:
0.5V	10µS
100
90
10
0%
	VA+1.40V

White limiter

4.Set gain to +6dB. In setup 1 menu set white clip on.

Set individual white limiter to: Master G = 60, R = 60, B = 60.

5.Adjust output for a video clip level of 102%.

Measure at: X51-21 (R)

X51-11 (G)

X51-22 (B)

Adjust with: ZR341 (R)

ZR541 (G) ZR741 (B)

Required result: +1428mV (R)

+1428mV (G) +1428mV (B)

Correct:
0.5V	10µS
100
90
10
0%
	VA+1.43V

Output amplitude readjustment

6.Set gain to 0dB. In setup 1 menu set white clip off.

7.Readjust white output amplitude.

Measure at:		Adjust with:
X51-21 (R)		ZR232 (R)
X51-11	(G)	ZR432 (G)
X51-22	(B)	ZR632 (B)

VF-Mon output

8.Test sawtooth on.

9.Adjust Y-output amplitude.

10.Adjust output dc level

Required result: +1400mV (R)

+1400mV (G) +1400mV (B)

Correct:
0.5V	10µS
100
90
10
0%
	VA+1.40V

Measure at: X52-24

Adjust with: ZR841

ZR830

Required result: +1400mV

0mVdc

Correct:
0.2V	10µS
100
90
10
0%
	VA+1400mV

11. Return Digital Video Processor to its position in the camera.

Adjustments Technical Manual LDK 20(S) - Studio Camera 4-15