Introduction To Satellite Communication – 2 – 6

76. Pulse Width Modulation may be generated :

(a) By differentiating Pulse Position Modulation
(b) With a Mono Stable Multivibrator
(c) By Integrating the signal
(d) With a Free Running Multivibrator

Answer
Answer : (a)

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

77. Which of the following Pulse Modulation System is analog :

(a) Delta
(b) PCM
(c) Differential PCM
(d) PWM

Answer
Answer : (d)

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

78. Frequency Shift Keying is commonly used in :

(a) Radio Transmission
(b) Telegraphy
(c) Telephony
(d) None of these

Answer
Answer : (b)

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

79. A carrier is amplitude modulated by two sine waves of different frequencies upto 40% and 60%. The resulting overall modulation index is :

(a) 1
(b) 0.72
(c) 0.4
(d) 0.6

Answer
Answer : (a)

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

80. Indicate the fields statement regarding the advantages of SSB over double side band, full carrier AM :

(a) more channel space is available
(b) the signal is more noise resistant
(c) transmitter circuit must be more stable, giving better reception
(d) much less power is required for the same signal strength

Answer
Answer : (c)

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

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