Q. In a 4-ary FSK, the frequencies are separated by fs. Then they are

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Q. In cell communication, cell stands for

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Q. In which of the following frequency bands are the standard AM radio broadcast stations?

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Q. The frequency tolerance for the RF carrier in the standard AM radio broadcast band is

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Q. If carrier is modulated by a digital bit stream having one of the possible phases of 0°, 90°, 180°, and 270°, then modulation is called

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Q. In FM, the frequency deviation is

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Q. If fh(t) is the Hilbert transform of f(t), and f(t) is a real valued signal, the pre-envelope of f(t) is

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Q. Speech amplifiers are usually operated as

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Q. In which frequency range is the noise figure in a transistor independent of frequency

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Q. Which of the following is likely to be associated with FM radio broadcasting?

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Q. Diffraction of EM waves

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Q. The start of modern computer age was started by the event

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Q. At night D layer of ionosphere is absent.

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Q. Which of the following is not correct?

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Q. Assertion (A): Data communication using digital data must be very accurate.

Reason (R): In analog signals redundancy is available but in digital signals redundancy is not available.

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Q. The number of repeaters in a coaxial cable link depends on

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Q. The overall noise temperature Te, absolute temperature T and noise figure F are related as

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Q. In binary data transmission DPSK is preferred to PSK because

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Q. A basic group B

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Q. By the use of which of the following the PPM can be converted to PWM?

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