Q. If the variance σx² of d(n) = x(n) - x(n - 1) is one-tenth the variance σx² of a stationary zero mean discrete time signal x(n), then the normalized autocorrelation function Rxx(x)/σx² at k = 1 is

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Q. Which of the following is not advantage of FM over AM?

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Q. In single tone FM discriminator (S₀/N₀) is

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Q. In a PCM the amplitude levels are transmitted in a 7 unit code. The no. of levels is

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Q. In high power AM transmission modulation is done at

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Q. Which one of the following gives maximum probability of error?

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Q. In FM, which one is correct?

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Q. In FM, increased depth of modulation increases

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Q. Which of the following frequency is likely to be associated with AM radio broadcast?

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Q. In which of the following schemes are several channels interleaved and transmitted together?

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Q. The audio frequency range is

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

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Q. Figure of merit is always unity in

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Q. Which of the following modulation is analog in nature?

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Q. In the spectrum of a FM wave

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Q. The gap width in audio heads is about 0.01 mm.

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Q. The PAM Signal can be detected by

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Q. FM is named so because

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Q. Which statement is incorrect for the signal x(t) = 5 sin (2π x 10³t) sin (2π x 10⁶t)?

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Q. In radio receivers, the value of IF is

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