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MHT CET202013 Oct 2020Morning ShiftPhysicsCommunication SystemActual

A signal of frequency 3 kHz is amplitude modulated on a carrier wave of frequency 2 5 MHz . The upper and lower sideband frequencies in the resultant signal are

Options

  1. A2500 kHz , 2503 kHz
  2. B2503 kHz , 2497 kHz
  3. C2 5 MHz , 3 kHz
  4. D5 5 MHz , 0 5 MHz

Correct answer

B. 2503 kHz , 2497 kHz

Step-by-step solution

aligned f_ R =f_ C +f_ m &=2500 KHz +3 kz &=2503 KHz f_ R =f_ C -f_ m &=2500 kHz -3 kHz &=2497 kHz aligned

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