ECE :: Communication Systems
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Convolution of x(t + 5) with impulse function δ(t - 7) is equal to
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Which of the following is a better recording medium?
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An angle modulated signal is given by s(t) = cos 2p (2 x 106t + 30 sin 150t + 40 cos 150t). The maximum frequency and phase deviations of s(t) are
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The PSD and the power of a signal g(t) are respectively Sg(ω) and Pg, the PSD and the power of signal a.g(t) are respectively
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In a 100% amplitude modulated signal, the power in the upper sideband when carrier power is to be 100 W and modulation system SSBSC, is
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The simplest method of suppression of unwanted side band in AM is
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For attenuation of low frequencies we should use
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Assertion (A): A colour TV uses a SAW filter to give stable band pass response and high gain.
Reason (R): Devices using SAW principle are used in many systems.
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x(t - 7 + 5) 
.