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Introduction To Satellite Communication – 2 – 7

81. A scheme in which several channels are interleaved and then transmitted together is known as :

(a) Frequency Division Multiplexing
(b) Time Division Multiplexing
(c) A Group
(d) A Super Group

ANSWER

EXPLANATION

82. What should be the oscillator frequency for tuning in 710 KHz on an AM radio with a 455 KHz IF :

(a) 1165 KHz
(b) 1015 KHz
(c) 255 KHz
(d) 127.5 KHz

ANSWER

EXPLANATION

83. The signalling channel consist of ?

(a) Order wire channel
(b) Management channel
(c) Transmit timing channel
(d) all of these

ANSWER

EXPLANATION

84. Satellites may reuse the same frequency in the same area by :

(a) Having many small antennas
(b) Overlapping radiation zones
(c) TDMA
(d) FDMA

ANSWER

EXPLANATION

85. The multiple satellite access technique suitable only for digital transmission is the :

(a) CDMA
(b) TDMA
(c) FDHA
(d) Both b and c

ANSWER

EXPLANATION

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