Q. Among the various modulation systems, the most favoured from the point of linearity of modulation and efficiency is

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Q. The phase of colour subcarrier burst in PAL is along the axis at

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Q. In tape recorder erase head is active during recording.

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Q. Which of the following microphones has maximum distortion?

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Q. The relation between bandwidth B, modulating frequency fm and frequency deviation Δf for a sinusoidally modulated FM signal is

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Q. FM broadcast is used in

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Q. The power requirement of a RADAR used in military operations is

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Q. An amplifier of passband 450 kHz to 460 kHz will be named as

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Q. Which of the following statement is false?

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Q. For broadcasting purpose, full AM signal is preferred to SSB signal because

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Q. Which of the following is correct (fm is maximum usable frequency, S is speed and G is width of air gap)?

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Q. In a hi-fi system the frequency response over the audio frequency range should be within

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Q. Multiplex techniques are used for

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Q. If a signal band limited for fm is sampled at a rate less than 2 fm the reconstructed signal will be

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Q. A better SNR can be obtained in a PCM by

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Q. The baud rate is

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Q. The type of noise that interfere very much with high frequency transmission is

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Q. In communication systems, the modulating signal is also called

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Q. In the human eye, an image persists for a time of about

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Q. The different channels in a TDM receiver are separated by

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