Electronics and Communication Engineering - Communication Systems

1. 

Which of the following form of angle modulation in this? If e = 10 sin(108 t + 3 sin 104 t)

A. AM
B. FM
C. AM or FM
D. AM or PCM

Answer: Option B

Explanation:

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2. 

The noise performance of a square law demodulator of AM signal is

A. better than that of an envelope detector
B. better than that of a synchronous detector
C. identical with that of a synchronous detector
D. poorer than that of an envelope detector

Answer: Option B

Explanation:

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3. 

In AM the amplitude of carrier components ... while in FM it

A. remains constant, does not remain constant
B. does not remain constant ... remains constant
C. remains constant... also remains constant
D. does not remain constant, also does not remain constant

Answer: Option A

Explanation:

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4. 

In a colour TV receiver, the function of comb filter is

A. to pass only the clusters of monochrome signal energy while blocking chrome signals
B. to pass only chrome signals and block monochrome signals
C. to block both monochrome and chrome signals
D. none of the above

Answer: Option A

Explanation:

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5. 

A communication receiver is

A. TRF receiver
B. a superheterodyne receiver
C. either (a) or (b)
D. neither (a) nor (b)

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

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