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In amplitude modulation, magnitude of side bands is ________ times the carrier amplitude.(a) ^ma⁄2(b) 4ma(c) ma(d) 2maThis question was posed to me at a job interview.My question comes from Quadrature Carrier Multiplexing in division Double Sideband Suppressed Carrier Modulation of Analog Communications

Answer»

Right answer is (b) 4ma

The explanation is: In amplitude MODULATION, for a good transmission and reception, the magnitude of side bands must be 4ma times the amplitude of CARRIER wave, (where, m = Modulation Index and a =Amplitude of Message SIGNAL).



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