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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 13
11.
Why does a FM radio station perform better than and AM station radiating the same actual power?
FM is immune to noise
AM has only two sidebands while FM has more
FM uses larger bandwidth for large modulation depth.
Capture effects appears in FM.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
In cable TV local programmes can be telecast at any frequency.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
In amplitude modulation, the magnitude of side bands is
ma/2 times the carrier amplitude, Ec
ma times the carrier amplitude, Ec
2ma times the carrier amplitude, Ec
4ma times the carrier amplitude, Ec
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
If fs be the signal frequency and fi be the intermediate frequency then image frequency is given by
fs + fi
fs ± fi
fs ± 2fi
fs + 2fi
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
In VHS format the width of tape is
2"
1"
1/2"
1/4"
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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