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

Page 41
Image 41
Technicolor - Thomson LDK 20(S) technical manual Gain Video, White limiter, Output amplitude readjustment, VF-Mon output