197. An active satellite has
A. antenna system
B. antenna system, transmitter, and receiver
C. antenna system, transmitter, receiver and power supply
D. only metallic balun
198. In satellite communication, modulation used is
A. AM
B. PAM
C. PCM
D. FM
199. Communication satellites are invariably
A. stationary
B. geostationary
C. revolving at their own speed
D. changing their track and speed
200. The distance of a geostationary satellite from the surface of the earth is nearly
A. 360 km
B. 3600 lcm
C. 36,00 km
D. 360,000 km
201. The waiting time for telephonic conversation via communication satellite is of the order of
A. 960ms
B. 680 ms
C. 540 ms
D. 330 ms
202. A satellite earth station has
A. only transmitting equipment
B. A satellite earth station has
C. both transmitting as well as receiving equipment
D. none of the above
203. A satellite used for international communication is known as
A. Comsat
B. Domsat
C. Intelsat
D. None of the above
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