Electronics and Communication Engineering - Satellite Communication

Exercise :: Satellite Communication - Section 1

16. 

Of the four INSAT-I satellites planned by India so for, only __________ has proved to be successful.

A. INSAT-IA
B. INSAT-IB
C. INSAT-IC
D. INSAT-ID

Answer: Option B

Explanation:

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17. 

Radio broadcasting is a familiar example of

A. space multiplexing
B. time multiplexing
C. frequency multiplexing
D. none of the above

Answer: Option C

Explanation:

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18. 

As compared to 17.34° antenna, the total increase in the signal relayed by 4.5° antenna of INTELSAT-IV is

A. 14.85
B. 220
C. 78
D. 3.85

Answer: Option B

Explanation:

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19. 

Which one of the following statements regarding DSI is wrong?

A. It is a digital form of TASI
B. Though it is more efficient than TASI, it is much slower
C. A speaker has to wait (it at all) for only a few milliseconds for reallocation of channel
D. It has increased the capacity of satellite channels by a factor of 2.2 or more with out degrading speech quality

Answer: Option B

Explanation:

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20. 

Which one of the following statements regarding compandor is FALSE?

A. It compresses the higher-amplitude parts of a signal before modulation and expands them back to normal again after demodulation.
B. It gives preferential treatment to the weaker parts of the signal
C. For weaker signals it gives a poor ratio of signal strength to quantizing error
D. Weaker signals, traverse more quantum steps than they would do otherwise and so quantizing error is reduced.

Answer: Option C

Explanation:

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