Introduction To Satellite Communication – 2 – 2

56. In satellite communication 6/4 GHz band by the disadvantages :

(a) There is no absorption by the rain
(b) Sky noise is low
(c) More interference from others users
(d) Fewest propagation problems

ANSWER
Answer : (c)

EXPLANATION
No answer description available for this question. Let us discuss.

57. One of the following can not be used to demodulate SSB :

(a) product detector
(b) diode balanced modulator
(c) bipolar transistor balanced modulator
(d) complete phase shift generator

ANSWER
Answer : (c)

EXPLANATION
No answer description available for this question. Let us discuss.

58. The commonly employed filter in SSB generation is :

(a) high pass filter
(b) mechanical filter
(c) RC filter
(d) LC filter

ANSWER
Answer : (b)

EXPLANATION
No answer description available for this question. Let us discuss.

59. The following is an indirect method of generating FM :

(a) Reactive FM modulator
(b) Armstrong modulation
(c) Varactor diode modulation
(d) Reactance BJT modulator

ANSWER
Answer : (b)

EXPLANATION
No answer description available for this question. Let us discuss.

60. The modulation index of an AM signal is increased from 0 to 1. The carrier power :

(a) Remains unchanged
(b) Gets doubled
(c) Increased by 50%
(d) Gets quadrupled

ANSWER
Answer : (c)

EXPLANATION
No answer description available for this question. Let us discuss.

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