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Communication SystemsDigital Modulation

In amplitude-shift keying (ASK), digital information is represented by changes in the carrier’s?

  • AAmplitude
  • BFrequency
  • CPhase only
  • DPropagation speed
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Correct Answer: A. Amplitude
Explanation: ASK represents digital symbols by changing the amplitude of a sinusoidal carrier.
Reference: Standard communication systems: digital modulation
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