Q. Which of the following is Doppler effect not used?

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Q. If the AF voltage is raised to 10 V, while the AM is dropped to 200 Hz, what is the deviation?

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Q. In pulse code modulation when the maximum frequency in the signal is fmax the bandwidth required will be

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Q. The oscillator frequency is set for

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Q. The main advantage of DM over PCM is

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Q. In filter system of sideband suppression the advantage of using mechanical filter is

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Q. Costa's receiver is used for

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Q. What is typical bandwidths of a 2-wire telephone line?

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Q. In a Vidicon camera tube,

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Q. The distance at which a sky wave is received back on earth decreases with angle of incidence for all angles of incidence.

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Q. A trigonometric function is synonyms to

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Q. The autocorrelation function of the white noise is

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Q. In a FM signal, the modulation index increases, then the power

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Q. Higher order TDM levels are obtained by

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Q. Assertion (A): In AM, use of SSB reduces the power and bandwidth requirement

Reason (R): A balanced modulator produces AM with carrier suppressed

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Q. Limiter is not essential in the following detector

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Q. A receiver has poor selectivity. It will also have poor

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Q. The depth of modulation is doubled in FM system then, the power transmitted

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Q. Ground wave can be used for communication upto

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Q. A Marconi antenna

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