7 If a carrier signal vc(t) = 10 sin (20000Ï€t+Ï€/2) volts is amplitude modulated by message vm(t)...

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Physics

7
If a carrier signal vc(t) = 10 sin (20000Ï€t+Ï€/2) volts isamplitude modulated by message vm(t) = 8sin(450Ï€t+Ï€/2), sketch thefrequency plot for the resulting AM signal and calculate thetransmission bandwidth. Write the expression for the AM signal. Ifthe resulting AM signal is viewed on a CRO, what will be the valuesof Vmax and Vmin? Also sketch the AM signal in CRO and statewhether the signal is under modulated / critically modulated / overmodulated; justify your answer.

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