Q. A pre-emphasis circuit provides extra noise immunity by

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Q. A tape recorder and deck are entirely similar.

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Q. Assertion (A): SSB systems generally have duplex operation

Reason (R): SSB systems are generally used in two way communication.

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Q. Which of the following is a digital modulation technique?

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Q. Which of the following is used to generate PDM?

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Q. A zero mean white Gaussian noise is passed through an ideal low pass filter of bandwidth 10 kHz. The output of the samples so obtained would be

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Q. What is the purpose of peak clipper circuits in radio transmitters?

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Q. In case of low level amplitude modulation system, the amplifiers following the modulated stage must be

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Q. Under ordinary circumstances, impulse noise can be reduced in

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Q. In case of frequency modulation, modulating voltage remains constant if the modulating frequency is lowered, then

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Q. If sampling is done at the rate of 10 kHz. The bandwidth required is

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Q. It is found that a ship to ship communication suffers from fading. This can be avoided by using

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Q. Skip distance depends on time of day and angle of incidence.

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Q. In practical commercial FM system, channel bandwidth is

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Q. In EM waves, polarization

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Q. The maximum power output of a standard A earth station over the total band allocated to satellite communication is about

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Q. PAM stands for

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Q. Which of the following is an indirect way of generating FM?

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Q. When the length of antenna is a whole wavelength

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Q. Circular polarization

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