Q. In a colour TV receiver AFT stands for

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Q. The smallest change in sound intensity that can be detected by human ear is __________ dB.

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Q. Low frequency boost can be easily compensated by

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Q. An MTI compares a set of received echos with those received during the previous sweep.

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Q. If e = 10 sin(10⁸ t + 3 sin 10⁴ t) then the deviation is

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Q. When a complex signals is used to frequency modulate a carrier, the resulting sideband distribution is

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Q. The output VR of the ratio detector is related with the output VF of similar Foster-Seeley discriminator as follows.

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Q. In grid bias modulation system the power required for modulating amplifier

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Q. In spread spectrum technique

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Q. QAM stands for

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Q. The bandwidth required for amplitude modulation is

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Q. In a system using QASK and 4 bits to form a symbol, the required bandwidth is

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Q. Each of the following statements regarding frequency modulation is true except

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Q. Assertion (A): Radio transmission is by sky waves

Reason (R): Waves having frequencies higher than 30 MHz penetrate the atmosphere and do not return to earth.

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Q. During playback the take up reel is

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Q. To avoid objectionable noise in a microwave TV link, the SNR should be about

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Q. Which one of the following is not necessarily an advantage of the phase cancellation method of obtaining SSB over the filter method?

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Q. Pulse modulation is used in

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Q. In an amplitude modulated waveform, the amplitude of the sideband is

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Q. In communication systems the frequency range used for voice is

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