Q. At present, the radio-frequency band mainly used by most satellites is

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Q. Orbital disturbances of a geosynchronous satellite are caused by the

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Q. Which one of the following statement is correct?

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Q. The Sun blots out the transmission of a geosynchronous satellite twice a year when satellite passes directly in front of it. This outage lasts for about

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Q. In satellite communication, frequency modulation is used because satellite channel has

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Q. In the case of a 70-MHz IF carrier for a transponder bandwidth of 36 MHz, energy must lie between MHz.

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Q. Which of the following factor does NOT contribute to the drift of a geostationary satellite from its stationary position in space?

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Q. In communication satellites, the up-link normally operates at a higher frequency than the down-link because it

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Q. A modem is

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Q. In synchronous detection of an AM signal

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Q. A typical signal strength received from a geosynchronous communication satellite is of the order of a few

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Q. The expression for satellite link frequencies such as 4/6 GHz denotes that

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Q. Assuming a minimum angle of elevation of 5°, a geosynchronous satellite remains in line-of-sight for __________ percentage of Earth's surface.

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Q. After the death of INSAT-IB, the mainstay of the entire Indian satellite network for some time to come would be

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Q. Which statement out of the following statement is wrong?

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Q. For satellite transmission, analog signals may be converted into digital form with the help of

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Q. The maximum signal propagation time of a geosynchronous satellite transmission is about __________ millisecond.

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Q. The life time of a geosynchronous communication

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Q. The noise temperature of sky is about __________ °K.

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Q. Assuming earth to be a sphere of radius 6400 km and height of a geosynchronous satellite above Earth as 36000 km, the velocity of a geosynchronous satellite is __________ km/hr.

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