Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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T8A01 Which of the
following is a form of amplitude modulation? a. | Spread spectrum | c. | Single
sideband | b. | Packet radio | d. | Phase shift keying
(PSK) |
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2.
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T8A02 What type of
modulation is most commonly used for VHF packet radio transmissions?
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3.
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T8A03 Which type of
voice mode is most often used for long-distance (weak signal) contacts on the VHF and UHF
bands?
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4.
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T8A04 Which type of
modulation is most commonly used for VHF and UHF voice repeaters?
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5.
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T8A05 Which of the
following types of emission has the narrowest bandv/idth? a. | FM voice | c. | CW | b. | SSB
voice | d. | Slow-scan TV |
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6.
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T8A06 Which sideband is normally used for 10
meter HF, VHF, and UHF singlesideband
communications?
a. | Upper sideband | c. | Suppressed sideband | b. | Lower
sideband | d. | Inverted sideband |
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7.
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T8A07 What is an advantage of single sideband (SSB)
over FM for voice transmissions?
a. | SSB signals are easier to tune | c. | SSB signals have narrower bandwidth | b. | SSB signals are less susceptible to interference | d. | All of these
choices are correct |
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8.
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T8A08 What is the approximate bandwidth of a
single sideband (SSB) voice signal?
a. | 1 kHz | c. | 6
kHz | b. | 3 kHz | d. | 15
kHz |
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9.
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T8A09 What is the approximate bandwidth of a
VHF repeater FM phone signal?
a. | Less than 500 Hz | c. | Between 10 and 15 kHz | b. | About 150
kHz | d. | Between 50 and 125 kHz |
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10.
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T8A10 What is the typical bandwidth of analog
fast-scan TV transmissions on the 70 centimeter band?
a. | More than 10 MHz | c. | About
3 MHz | b. | About 6 MHz | d. | About 1
MHz |
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11.
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T8A11 What is the approximate maximum
bandwidth required to transmit a CW signal?
a. | 2.4 kHz | c. | 1000
Hz | b. | 150 Hz | d. | 15
kHz |
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