Start Grob TV End Chapter Exercise 07
Answers are Underlined
Chapter 7
Video Signal Analysis
7-1
- a. What are the 3 parts of the composite video signal? Camera signal, H sync and H blanking.
7-2
- a. IRE of Sync: 40
- b. Black set up: 7.5
- c. The camera signal: 92.5
7-3
- a. Width of H blanking pulse? 10.2 µs.
- b. Visible H trace? 53.5 µs.
- c. Width of H sync pulse? 5 µs.
7-4
- a. V sync: 3H lines wide
- b. V blanking: 21H lines wide
- c. Equalizing: 31,500 Hz
7-5
- a. Typical video signal voltage for the picture tube is 100 V with negative polarity.
7-6
- a. Sync polarity is negative.
7-7
- a. Maximum number of pixels for each horizontal line is 426.
- b. For the total picture area, it is 144,000.
7-8
- a. The average dc level is close to the blanking level for a dark scene.
- b. The picture tube reproduce black with zero beam current.
7-9
- a. Gamma affects the contrast.
- b. Picture tubes have a gamma greater than 1.
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