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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 15
6.
Hue of a colour means
amount of light energy received by eye
predominant spectral purity of colour light
amount of other colours present
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
Consider the following statements: The radar pulse must be flat topped to
  1. allow accurate range measurement
  2. allow good minimum range
  3. prevent frequency changes in magnetron
  4. make the returned echoes easier to distinguish from noise.
Which of the above are correct?
1, 2, 3, 4
1, 2, 3
1, 2
1, 3, 4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
Filter method and phasing method are the methods for generating
SSB signal
vestigial side band signal
both SSB and vestigial sideband signals
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
In amplitude modulation
the amplitude of carrier varies in accordance with the amplitude of the modulating signal
the modulating frequency lies in the audio range
the amplitude of the carrier remains constant
the amplitude of the carrier varies in accordance with the frequency of the modulating signal
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
Which one the following is an advantage of AM over FM?
FM has wide bandwidth
FM has better
FM is more immune to noise
Probability of noise spike generation is less in AM
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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