Q. The typical squelch circuit

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Q. A communication channel with additive white Gaussian noise, has a bandwidth of 4 kHz and an SNR of 15. Its channel capacity is

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Q. In a superheterodyne receiver, the IF stage has better selectivity than RF stage because

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Q. An arbitrary signal m (t) has zero average value and it is bandlimited to 3.2 kHz. It is sampled at the rate of 8 K samples/S. The samples are passed through an ideal bandpass filter with centre frequency of 32 kHz and bandwidth of 6.4 kHz. The output of band pass filter is

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Q. The purpose of incorporating a pre-selector stage in a receiver is to

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Q. Vividh Bharati programme is transmitted in

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Q. The image frequency of a superheterodyne receiver is

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Q. Noise limiter is provided on AM receivers to

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Q. A low ratio of the A.C. load impedance of a diode detector results in

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Q. A trimmer is basically a

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Q. In a radio receiver

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Q. The sensitivity of a superheterodyne receiver is determined by

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Q. In a radio receiver

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Q. In radio receiver, the maximum contribution to noise is from

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Q. Power spectral density of white noise

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Q. In a FM waveform, the side bands are spaced at intervals equal to

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Q. In a transistor receiver, the use of FET as the first stage amplifier is likely to

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Q. The household radio receiver uses

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Q. The source of which of the following noise is different from that of the remaining?

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Q. A receiver having poor IF selectivity will also have poor

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