Q. A pure tone at 1000 Hz has a dB level of 40 dB. If the required dB level is 100, the number of such tones is

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Q. The spectrum of the white noise and an impulse function is similar in following aspects

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Q. In a telephone system, the grade of service means

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Q. A longwave AM broadcast transmitter needs

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Q. AGC voltage is applied to the stages which are

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Q. The modulation index of a narrowband FM signal is

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Q. Which is a digital coding technique?

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Q. Which of the following noise sources is different from others?

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Q. For the transmission of normal speech, the PCM channel needs a bandwidth of __________ kHz.

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Q. How much is contributed by each bit in the code word of a PCM system under uniform and symmetric quantization to the signal to noise ratio?

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Q. Noise which assumes great importance at high frequencies is

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Q. Which one is Analog Continuous modulation technique?

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Q. AM transmitter employing low level modulation

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Q. As the area of a public meeting increases the amplifier power output required increases.

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Q. In VHS format width of audio track is

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Q. In a plate modulated class C amplifier, the peak supply voltage is V. The maximum plate-cathode voltage can be

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Q. In a single sideband suppressed carrier AM system, the modulation index is changed from 0 to 1, the power content of the signal

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Q. Neper is

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Q. Modulation system used for video-modulation in television broadcast is

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Q. The highest modulation frequencies typically used in FM broadcast is

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