Exercise: Communications

Questions for: Communications

Amplitude modulation is the process of varying the radio frequency with the modulating frequency.
A:
True
B:
False
C:
D:
Answer: B
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A VCO is a variable capacitance oscillator.
A:
True
B:
False
C:
D:
Answer: B
A voltage-controlled oscillator or VCO is an electronic oscillator designed to be controlled in oscillation frequency by a voltage input.
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Frequency modulation is achieved by varying the frequency of an oscillator with a modulating signal.
A:
True
B:
False
C:
D:
Answer: A
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An AM signal is made up of a carrier, an upper-side frequency, and a lower-side frequency.
A:
True
B:
False
C:
D:
Answer: A
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Selectivity in a receiver is provided by the resonant circuits of the IF section.
A:
True
B:
False
C:
D:
Answer: A
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