Exercise: Satellite Communication

Questions for: Satellite Communication

Which of the following statement regarding link loss for a satellite is wrong?
A:
For fixed antenna, it is inversely proportional to f2
B:
For fixed frequency, it is inversely proportional to the product of the antenna aperture areas
C:
For a given satellite operating at a given frequency, it is inversely proportional to
D:
Loss in down-link is negligible as compared to that in uplink
Answer: D
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Space communication links are being increasingly moved into Ka-band (200-30 GHz) because it
A:
offers a much wider available bandwidth
B:
does not suffer from atmospheric at tenuation
C:
permits the use of smaller antenna
D:
does not suffer from rain attenuation
Answer: A
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A telephone user while talking to a person via a satellite has to wait for reply for about __________ millisecond.
A:
100
B:
270
C:
470
D:
540
Answer: D
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APPLE was into orbit on 19 th June 1981 by European Space Agency (ESA) from
A:
Cape Canaveral in Florida
B:
Kourou in French Guyana
C:
Canarvon in Western Australia
D:
Bangalore in South India
Answer: B
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Mark out the WRONG statement.
As compared to FDMA, the demand assignment system TDMA
A:
Needs very high-speed burst modems
B:
Faces no problems caused by intermodulation of carriers so that transponder can be used at its full power
C:
Needs high-speed manipulation of bit streams
D:
Is less flexible so that channels of widely different capacities cannot used and intermixed
Answer: D
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