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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 18
36.
The orbital period of a geostationary communication satellite is
12 hours
24 hours
36 hours
48 hours
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
Which of the following is not true as regards communication receiver?
It is exactly same as radio receiver used in households
It can be used, besides communication, for detection in high frequency bridges
It is designed to perform the task of low and high frequency reception better than in household receiver
Its tuning and operation are more complicated than those in household receiver
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
Which of the following is the disadvantage of PDM and PPM?
It requires pulses of larger widths
More samples are needed per second
More powerful transmitter is required
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Frequency frogging is used in a carrier system to
conserve frequencies
reduce distortion
reduce cross talk
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
TDM
can be used with PCM only
interleaves pulses belonging to different transmissions
combines five groups into a super group
stacks 24 channels in adjacent frequency slots
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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