Deck 17: Television

Question 1

Television had its beginnings with:

A) development in the 1930's and broadcasting beginning in the 1950's.
B) development in the 1920's and broadcasting beginning in the 1940's.
C) development in the 1920's and broadcasting beginning in the 1950's.
D) development in the 1930's and broadcasting beginning in the 1940's.

Answer 1

B

Question 2

The aspect ratio for NTSC broadcast television is:

A) a 4:3 ratio.
B) a 6:9 ration
C) a 7:9 ratio
D) all of the above.

Answer 2

A

Question 3

Horizontal resolution for U.S. television is approximately:

A) 428 horizontal lines.
B) 339 horizontal lines.
C) 339 vertical lines.
D) 428 vertical lines.

Answer 3

D

Question 4

Which of the following is a function of the sync separator?

A) clips the signal
B) shapes the signal
C) integrates the signal
D) filters the harmonics

Question 5

Vertical resolution for U.S. NTSC television is approximately:

A) 428 horizontal lines.
B) 428 vertical lines.
C) 339 vertical lines.
D) 339 horizontal lines.

Question 6

The device that feeds both visual and aural TV transmitter signals to the antenna while not allowing either to be fed back into the other transmitter is called:

A) a synchronizer.
B) an image orthicon.
C) a vidicon.
D) a diplexer.

Question 7

The interval of time it takes the moving electron beam to move from the end of one line back to the start of the next lower line is known as:

A) raster interval.
B) vector interval.
C) scanning interval.
D) retrace interval.

Question 8

The most widely used TV camera imaging device today is:

A) the diplexer.
B) the vidicon.
C) the CCD.
D) the iconoscope.

Question 9

Which of the following frame frequencies is adequate to prevent flicker?

A) 20 per second
B) 15 per second
C) 60 per second
D) 30 per second

Question 10

Which of the following is found in digital TV?

A) A/D converter
B) adaptive scanning conversion
C) D/A converter
D) all of the above

Question 11

Charge coupled devices (CCD's) are typically found in which of the following camera applications?

A) video phones
B) security monitors
C) camcorder cameras
D) all of the above

Question 12

The horizontal oscillator frequency for U.S. NTSC television broadcasts is set at approximately:

A) 30 Hz.
B) 3.58 MHz.
C) 15.75 kHz.
D) 60 Hz.

Question 13

The type of synchronizing pulse that has a 10 microsecond pulse width with an eight cycle sinewave burst at 3.58 MHz on its "back porch" is called:

A) the color synchronizing pulse.
B) the equalizing pulse.
C) the vertical retrace pulse.
D) the horizontal retrace pulse.

Question 14

Channel 9 on U.S. television extends from 186 to 192 MHz. The channel 9 sound carrier is approximately:

A) 186.5 MHz.
B) 191.25 MHz.
C) 187.25 MHz.
D) 191.75 MHz.

Question 15

For U.S. NTSC TV broadcasts, the total number of visible scanning lines is set at:

A) 339 lines.
B) 40 lines.
C) 485 lines.
D) 525 lines.

Question 16

The color burst frequency for U.S. NTSC television broadcasts is approximately:

A) 30 Hz.
B) 3.58 MHz.
C) 60 Hz.
D) 15.75 kHz.

Question 17

The high voltage output is derived from the low voltage power supply using:

A) the vertical oscillator.
B) the low voltage power supply transformer.
C) the yoke coil.
D) the flyback transformer.

Question 18

Most television IF amplifiers are stagger tuned in order to:

A) get a very narrow bandwidth with high Q.
B) get a wide enough bandwidth for the TV channel but still have steep roll-offs at the passband edges
C) receive both VHF and UHF TV channels.
D) receive both high-band and low-band VHF TV channels.

Question 19

To obtain the steep attenuation curve for the sound carrier portion of the IF signal passed by the TV receiver IF amplifiers, what is used?

A) ceramic filters
B) SAW filters
C) mechanical filter
D) wave traps

Question 20

The field frequency for U.S. NTSC television broadcasts is:

A) 100 fields per second.
B) 40 fields per second.
C) 30 fields per second.
D) 60 fields per second.

Question 21

In a television receiver, in order to produce sufficient contrast in the display of the picture tube, the video amplifier stages must have a minimum frequency response of:

A) 4 MHz.
B) 6 MHz.
C) 45 MHz.
D) 15.75 kHz.

Question 22

The RF modulation technique for ATSC DTV transmission is:

A) 8VSB
B) 8QPSK
C) 8FSK
D) 8QAM

Question 23

The video compression technique selected for DTV transmission is:

A) GIF
B) JPEG
C) MPEG2
D) BMP

Question 24

The purpose of the PSIP is to (select one).

A) it is used to select mono and stereo audio
B) it is used to identify NTSC feeds
C) it is used for closed captioning
D) it is used to identify the channel

Question 25

The point where there is a lot of multiple echo and you have reached the threshold of visibility in a DTV signal is called

A) PSIP, program, Information, control, ect
B) cliff effect
C) the receiver limit function
D) the receiver gain function

Question 26

The ATSC Data Transport rate is which of the following?

A) 19.39Mbps
B) 19.39kbps
C) 4.2 Mbps
D) 3.579545 MHz

Question 27

The term for when a digital picture freezes even when there is motion is:

A) pixelate
B) 8VSB
C) stop motion
D) freeze frame

Question 28

What three things make up the ATSC transport stream?

A) Video data stream (MPE62 encoding)
B) PSIP, program, Information, control, ect
C) The 3.579545 MHz color subcarrier
D) Audio data stream (AC-3 encoding)

Question 29

Which of the following is not an improvement made in television since 1980?

A) an increase in the number of UHF TV channels
B) separate audio program (SAP)
C) Zenith/dbx enhanced audio
D) high definition TV enhanced video

Question 30

The digital audio compression technique specified for digital television is:

A) 8VSB
B) AC-3
C) NTSC
D) MPEG2

Question 31

The DTV standard based on the recommendations of the ATSC provides for the transmission of television programs in the:

A) SDTV screen format
B) HDTV screen format 16 x 9
C) Multiple SDTV programs
D) All of the above

Question 32

This is used by the digital receiver to lock onto the digital data stream so the multiplexed data can be recovered.

A) the GPS data stream
B) the SONET data stream
C) the DTV pilot signal
D) none of the above

Question 33

Which is not a color of a beam on a color picture tube?

A) green
B) blue
C) yellow
D) red

Question 34

By generating the color information at exactly the right color subcarrier frequency (approximately 3.58 MHz) it is possible to produce color frequency components sandwiched in between the
Frequency components of the black and white video signal. This technique is known as:

A) convergence.
B) interleaving.
C) shadow masking.
D) interlaced scanning.

Question 35

The ATSC pilot carrier provides:

A) stereo indicator
B) frame sync
C) a clock reference
D) second channel programming

Question 36

A faulty TV receiver having symptoms of normal sound but no raster must have a problem in the:

A) horizontal or vertical oscillator or high voltage power supply.
B) RF, IF, or video amplifiers prior to sound take-off.
C) main power supply.
D) video amplifiers following the sound take-off.

Question 37

A faulty TV receiver having symptoms of normal raster, but distorted sound and picture must have a problem in the

A) video amplifiers following the sound take-off.
B) RF, IF, or video amplifiers prior to sound take-off.
C) main power supply.
D) horizontal or vertical oscillator or high voltage power supply.

Question 38

A faulty TV receiver having symptoms of no picture, no sound, and no raster must have a problem in the:

A) video amplifiers following the sound takeoff.
B) RF, IF, or video amps prior to sound takeoff.
C) horizontal or vertical oscillator or high voltage power supply.
D) main power supply.

Question 39

The 8VSB exciter inserts what to aid the 8VSB receiver in accurately recovering the transmitted data?

A) frame sync
B) pilot carrier
C) segment sync
D) all of the above

Question 40

The commercial name for the AC-3 audio standard is:

A) 4:4:2
B) 5.1 channel input
C) ATSC
D) none of the above