Electronic Communication by Gary Miller Chapter 16 with Answers

Chapter 16 Television

1	A television transmitter actually transmits two signals at once. They are
	a. An amplitude-modulated video signal and frequency-modulated audio signal
	b. Two amplitude-modulated signals: video and audio
	c. An amplitude-modulated audio signal and frequency-modulated video signal
	d. Two frequency-modulated signals: video and audio
2	The most widely used type of TV camera is the
	a. Charge couple device
	b. Vidicon
	c. Image orthicon
	d. Iconoscope
3	Synchronizing pulses that consist of equalizing pulses, followed by serrations, followed by more equalizing pulses at a rate of 60 times per second are called
	a. Color synchronizing pulses
	b. Horizontal retrace pulses
	c. Vertical retrace pulses
	d. Eight-cycle back-porch pulses
4	The frame frequency for U.S. television broadcasts is approximately
	a. 30 frames per second
	b. 40 frames per second
	c. 60 frames per second
	d. 100 frames per second
5	Channel 12 on U.S. television extends from 204 to 210 Mhz. The channel 12 carrier frequency is Approximately
	a. 204.5 Mhz
	b. 205.25 Mhz
	c. 211.25 Mhz
	d. 211.75 Mhz
6	The length of time an image stays on the screen after the signal is removed is termed
	a. Retention
	b. Flicker
	c. Persistence
	d. Back porch
7	Which is not part of the tuner section of a TV receiver?
	a. The rf amplifier stage
	b. The mixer stage
	c. The local oscillator stage
	d. The video-detector stage
8	The stage in a TV receiver that filters out the vertical and horizontal retrace pulses from the video signal is the
	a. Video detector
	b. Video IF amplifier
	c. Sync separator
	d. Sound detector
9	The winding around the CRT yoke that deflects the electron beam with its magnetic field is called the
	a. Coil
	b. Yoke
	c. Deflector
	d. Magneto
10	A cumbersome series of adjustments to a color TV receiver in order to make sure that the three electron beams of the picture tube are positioned exactly on their respective color dots on the face of the picture tube is called
	a. Alignment
	b. Convergence
	c. Interleaving
	d. Interlacing
11	A faulty TV receiver having symptoms of normal sound and raster but no picture must have a problem in the
	a. Horizontal or vertical oscillator or high-voltage power supply
	b. Main power supply
	c. Video amplifiers following the sound takeoff
	d. RF, IF, or video amplifiers prior to the sound takeoff
12	Raster refers to
	a. CRT illumination by scan lines when no signal is being received
	b. CRT resolution
	c. CRT aspect ratio
	d. All the above
13	The high voltage for the anode of the CRT is obtained from the low-voltage power supply using
	a. Its power-line transformer
	b. The yoke coil
	c. The vertical oscillator
	d. The flyback transformer
14	The introduction of digital television in the United States has been hampered by
	a. Delays in chip designs
	b. Shortages of appropriate chips
	c. Customer rejection
	d. Less than ideal regulatory climate
15	When a digital picture freezes even when there is motion in the video, it is
	a. due to bandwidth problems
	b. Called a pixelate
	c. Due to noise
	d. b and c

Answers:

A

A

C

A

B

C

D

C

B

B

C

A

D

D

D