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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.
Problem: (a) Compare the different MAC schemes, namely FDMA, SDMA, TDMA and CDMA. (b) Describe with help of diagrams the different phenomena involved in multipath propaga
The Lennox to Bowmanville 500 kV circuit, spanning a distance of about 180 km, has series (inductive) impedance j 0.0224 pu and shunt (capacitive) admittance j 2.34 pu, quoted on b
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give the expression
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(a) Show Diode as a half wave rectifier. Determine efficiency and Ripple factor of the half wave rectifier. (b) Write short note on LED. Briefly explain : (i) Positive cli
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