ECE :: Communication Systems
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Human ear can detect sound intensities of the order of
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If output power of a radio receiver is doubled, its volume is increased by __________ dB.
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Which of the following statements is correct?
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In Modulation, "carrier" is
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To eliminate ghosts in the picture
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Consider a sampled signal y(t) = 5 x 10-6 x(t)
where x(t) = 10 cos (8p x 103)t and ts = 100 μ sec. when y(t) is passed through an ideal low-pass filter with a cut off frequency of 5 kHz, the output of the filter is -
The frequency range of 300 kHz to 3000 kHz is known as
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Which of the following does not cause losses in optical fibre cables?
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For a low level AM system, the amplifiers modulated stage must be
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Assertion (A): In FM the frequency of the carrier is varied by the modulating voltage
Reason (R): FM and PM are two forms of angle modulation.
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