Exercise: Communication Systems

Questions for: Communication Systems

At a given probability of error, binary coherent FSK is interior to binary coherent PSK by
A:
6 dB
B:
3 dB
C:
2 dB
D:
0 dB
Answer: B
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The efficiency of a direct radiating cone type loudspeaker is about
A:
5%
B:
20%
C:
50%
D:
80%
Answer: A
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The number of bits of information required to indicate the correct selection of 3 independent consecutive events out of 75 equally probable events is
A:
6.23
B:
18.69
C:
10.46
D:
24.92
Answer: B
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In a television transmitter, the output stage is most likely to be
A:
screen modulated class C amplifier
B:
plate modulated class C amplifier
C:
grid modulated class A amplifier
D:
grid modulated class C amplifier
Answer: D
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Consider the following statements about PCM
  1. PCM is not noise resistant
  2. PCM requires complex encoding and quantizing circuitry
  3. PCM requires large bandwidth
Which of the above are correct?
A:
1 only
B:
1, 2, 3
C:
2, 3
D:
1 and 3
Answer: C
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