Exercise: Communication Systems

Questions for: Communication Systems

As the area of a public meeting increases the amplifier power output required increases.
A:
True
B:
False
C:
D:
Answer: A
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AM transmitter employing low level modulation
A:
uses class C amplifier for amplification
B:
requires higher audio power
C:
has a poor efficiency
D:
has a higher efficiency
Answer: C
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Which one is Analog Continuous modulation technique?
A:
AM
B:
DM
C:
PAM
D:
PCM
Answer: A
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Noise which assumes great importance at high frequencies is
A:
flicker noise
B:
Johnson noise
C:
transit-time noise
D:
shot noise
Answer: C
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How much is contributed by each bit in the code word of a PCM system under uniform and symmetric quantization to the signal to noise ratio?
A:
3 dB
B:
4 dB
C:
5 dB
D:
6 dB
Answer: D
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