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Q. If the output signal fromanAMmodulator is given by u(t) = 5 cos 1800 πt + 20 cos 2000 πt + 5 cos 2200 πt , determine:
(a) The modulating signal m(t) and carrier c(t).
(b) The modulation index.
(c) The ratio of the power in sidebands to the power in the carrier.
Consider an elementary two-pole rotating machine with a uniform (or smooth) air gap, as shown in Figure, inwhich the cylindrical rotor ismountedwithin the stator consisting of a ho
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1. Find the Nyquist rate for the following signals: (a) x(t) = 5 sin 3000Πt cos 4000Πt (b) A binary channel with bit rate 36000 bps is available for PCM voice transmission.
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Q. Mention the advantages and disadvantages of direct coupled coupling? Advantages: 1.Simple circuit due to minimum use of resistor 2.Low
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