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AP EAMCET202419 May 2024Evening ShiftPhysicsCommunication SystemActual

A message signal of 3 kHz is used to modulate a carrier signal frequency 1 MHz using amplitude modulation. The upper side band frequency and band width respectively are

Options

  1. A1.003 MHz and 6 KHz
  2. B0.997 MHz and 6 KHz
  3. C1.003 MHz and 3 KHz
  4. D1.003 MHz and 2 MHz

Correct answer

A. 1.003 MHz and 6 KHz

Step-by-step solution

For amplitude modulation, aligned & f _ m =3 kHz , f _ c =1000 kHz & Upper side frequency, f _ u = f _ c + f _ m & =1000+3=1003 KHz & =1.003 MHz & Band width = f _ u - f _ l = ( f _ c + f _ m )- ( f _ c - f _ m ) & =2 f _ m =2 3=6 kHz aligned

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