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Electronics and Communication Engineering - Satellite Communication

Exercise : Satellite Communication - Section 2
11.
A modem is
a form of commutator
a device for digitizing speech
a circuit used for suppressing microwave mterference
an electronic circuit which carries out modulation and demodulation of a carrier frequency
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
In synchronous detection of an AM signal
Carrier is completely suppressed
Both side hands are suppressed
Only one side band and part of carrier is suppressed
One side band and full carrier is suppressed
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
A typical signal strength received from a geosynchronous communication satellite is of the order of a few
milliwatts
kilowatts
picowatts
watts
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
The expression for satellite link frequencies such as 4/6 GHz denotes that
4 GHz is the up-link and 6 GHz is the down-link frequency
4 GHz is the down-link and 6 GHz is the up-link frequency
the system operates at a mean frequency of 5 GHz
one frequency is used as a back up for the other
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Assuming a minimum angle of elevation of 5°, a geosynchronous satellite remains in line-of-sight for __________ percentage of Earth's surface.
30.3
42.4
50
25
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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