Deck 4: How Electronic Media Work

Question 1

Frequencies used for radio communication are found __________ the electromagnetic spectrum.

A)near the lower end of
B)near the middle of
C)near the upper end of
D)throughout
E)nowhere in

Answer 1

A

Question 2

Which type of wave is not part of the electromagnetic spectrum?

A)Cosmic
B)Light
C)Sound
D)X-rays
E)Radio

Answer 2

C

Question 3

A carrier wave is modulated to

A)carry information.
B)travel better over difficult terrain.
C)travel faster.
D)travel further.
E)travel more slowly.

Answer 3

A

Question 4

In radio communication, __________ determines information capacity.

A)channel frequency
B)channel length
C)channel width
D)signal power
E)signal frequency

Question 5

AM signals can travel much farther at night because of __________ propagation.

A)ground-wave
B)sky-wave
C)direct-wave
D)terrestrial
E)soil conductivity

Question 6

The best location for an FM transmitting antenna is

A)on dry, sandy soil.
B)in a saltwater swamp.
C)anywhere in the licensing area.
D)in line with the north magnetic pole.
E)on the highest unobstructed site available.

Question 7

A television station's interference zone is

A)larger than its service area.
B)the same as its service area.
C)smaller than its service area.
D)caused by high transmitter power.
E)caused by low transmitter power.

Question 8

The FCC has classified the largest number of AM channels as

A)local.
B)regional.
C)carrier current operations.
D)sky wave.
E)clear.

Question 9

International short-wave radio stations

A)use multiplexing to increase their range.
B)utilize ground-wave propagation patterns.
C)utilize direct-wave propagation patterns.
D)depend on satellite relays for intercontinental transmission.
E)change frequencies periodically during their broadcast operations.

Question 10

Which of the following is not an advantage that FM radio has over AM radio?

A)Less atmospheric interference.
B)Less interference from competing signals.
C)Greater dynamic range.
D)Greater transmission coverage.
E)Ability to multiplex secondary services.

Question 11

An FM radio station covering a radius of about 60 miles, which is considered a wide range, would be classified as a __________ radio station.

A)Class A
B)Class B
C)Class C
D)Class D
E)Class E

Question 12

__________ scanning is used in creating a television picture.

A)Field
B)Interlace
C)Multiplex
D)Pixel
E)Auxiliary

Question 13

In the U.S., television uses __________ sound.

A)AM
B)FM
C)subcarrier
D)multiplex
E)vertical blanking

Question 14

A VHF television channel occupies __________ times as much space on the electromagnetic spectrum as an AM radio channel.

A)10
B)30
C)200
D)400
E)600

Question 15

Flat screen technology called __________ is used in portable TVs and laptop computers.

A)time base correctors
B)integrated circuits
C)transistors
D)VLSIC
E)LCDs

Question 16

This flat-screen technology uses a grid of tiny channels (pixels) filled with gas, usually a mixture of neon and xenon.

A)PDP.
B)FED.
C)DMD.
D)VBI.
E)CRT.

Question 17

An advantage of digital processing is

A)a wider channel requirement than the same signals in analog form.
B)band compression.
C)ability for home recording.
D)analog encoding.
E)lack of signal distortion.

Question 18

The wholly new television transmission system that will eventually replace the current U.S.system is commonly called

A)DTV.
B)NTSC.
C)DAT.
D)DAB.
E)MUSE.

Question 19

This group advises the FCC on DTV formats.

A)NTSC
B)ATSC
C)COFDM
D)ISDN
E)ITU

Question 20

In radio transmission, __________ promises to replace U.S.analog radio broadcasting.

A)ISD
B)DAB
C)DAT
D)DCC
E)RBDS

Question 21

This system transmits a digital signal on an FM station subcarrier that can be displayed on a special receiver panel.

A)DARS
B)DCC
C)RBDS
D)DAT
E)ISDB

Question 22

Wavelength is measured as the distance from the crest of one wave to the crest of the next.

Question 23

Frequency is expressed in terms of cycles per second, or Hertz (Hz), to honor a famous radio physicist.

Question 24

When a radio station's carrier wave is modulated, adjacent frequencies called tangent waves are used.

Question 25

Both FM radio and television signals rely on both ground waves and direct waves.

Question 26

One solution the FCC uses to reduce AM co-channel interference during evening hours is to have some stations use lower nighttime power.

Question 27

AM's 10-kHz spacing means that channels extend 5 kHz above and below their carrier frequencies.

Question 28

FM channels are twenty times wider than AM channels.

Question 29

The United States television video image is made up of 625 lines per frame.

Question 30

TV sets have adequate resolution for use as computer monitors.

Question 31

ERP keeps camera pickup tubes in step with receiver display tubes.

Question 32

Digital signal processing breaks down an incoming signal into a stream of separate pulses and assigns a numerical value to each pulse.

Question 33

Digital television transmission system will eventually replace NTSC systems.

Question 34

Radio broadcast data systems will be transmitted on an FM subcarrier for receivers equipped with a special microchip.

Question 35

Differentiate among amplitude, length, frequency, and velocity in wave motion.

Question 36

How are ground, direct, and sky waves propagated?

Question 37

How is interference between TV stations minimized?

Question 38

Differentiate between AM and FM signals and their propagation.

Question 39

Trace the development of television pictures from camera chips to home receivers.

Question 40

How do UHF and VHF signals differ?

Question 41

Differentiate between LCDs and PDPs.

Question 42

Discuss advantages and disadvantages of digital audio broadcasting.