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Multiple Choice Quiz
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1
Amplitude modulation by square waves or rectangular binary pulses is referred to as
A)phase-shift keying
B)amplitude-shift keying
C)frequency-shift keying
D)binary-shift keying
2
Once the AM signal is amplified, it is fed to antenna with characteristic impedance that is ideally
A)inductive
B)capacitive
C)resistive
D)infinite
3
With AM which of the following conveys no information?
A)lower sideband
B)upper sideband
C)both sidebands
D)carrier
4
In amplitude modulation, how much of the transmitted power is in the carrier?
A)one-half
B)three-quarters
C)one-third
D)two-thirds
5
Double-sideband suppressed carrier signals are generated by a circuit called a
A)balanced demodulator
B)balanced modulator
C)beat frequency oscillator
D)notch filter
6
Which of the following is not a major benefit of SSB?
A)noise in the signal is reduced
B)conserves spectrum space
C)less transmitter circuitry is used
D)more fading of an SSB signal over long distances
7
What is the low-level carrier called that is sometimes transmitted along with the two sidebands in DSB?
A)pilot carrier
B)suppressed carrier
C)composite carrier
D)sideband carrier
8
A TV signal consists of an audio signal that is
A)amplitude modulated
B)frequency modulated
C)SSB
D)DSB
9
According to the International Telecommunications Union an amplitude-modulated analog TV would be classified as
A)A3F
B)J3E
C)F2D
D)G7E
10
A sine wave carrier cannot be modified by the intelligence signal through which of the following?
A)amplitude modulation
B)pulse modulation
C)frequency modulation
D)phase modulation





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