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Q4. Let m(t) = rect (9t) +2 cos(6mt) to be carried to fe = 100Hz. Sketch the magnitude spectrum of the modulated signal when

Q4. Let m(t) = rect (9t) +2 cos(6mt) to be carried to fe = 100Hz. Sketch the magnitude spectrum of the modulated signal when the following schemes are used: (a) Classical AM (b) DSB-SC (c) SSB-SC with lower side-band

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