Start Grob TV End Chapter Exercise 02
Answers are Underlined
Chapter 2
The Television Picture
2-1
- a. One picture element is a pixel.
- b. A still picture has many pixels, T
- c. The position of a picture element is important in the reproduction.
2-2
- a. How many complete picture frames are scanned in 1 sec? 30 picture frames
- b. How many scanning lines are there In one frame? 525 scanning lines
2-3
- a. Motion is shown by a rapid succession of still pictures. T
- b. Flicker results when the screen is made alternately bright and dark.
2-4
- a. How many scanning fields are there in one picture frame? 2 scanning fields
- b. How many fields are scanned in one second? 60 fields
2-5
- a. What is the horizontal scanning frequency in hertz? 15750 Hz.
- b. What is the time for scanning one horizontal line in one second? 63.5 ms.
- c. What is the vertical field-scanning frequency, in hertz? 60 Hz.
2-6
- a. What is the frequency of horizontal synchronizing pulses for every line, in hertz? 15,750 Hz.
- b. What is the frequency of vertical synchronizing pulses for every field? 60 Hz
2-7
- a. The Y luminance is for black-and-white picture information.
- b. The chrominance signal for color is 3.58 MHz.
- c. The chrominance signal includes red, green, and blue picture information.
2-8
- a. More video signal increases the contrast.
- b. The average screen illumination is its brightness.
2-9
- a. What is the width of TV broadcast channel? 6 MHz
- b. What is the intercarrier sound frequency? 4.5 MHz
- c. What is the maximum frequency deviation for the FM sound signal? 25 kHz
2-10
- a. What is the aspect ration for a TV picture? 4:3
- b. The picture carrier signal is AM.
- c. The sound carrier signal is FM.
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