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Principles of Communication: Communication System MCQ

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Communication SystemMediumQuestion 20280

Question

In a communication system, repeaters are used to:
  1. A
    Add noise to the signal
  2. B
    Reduce the carrier frequency
  3. C
    Amplify and regenerate the signal to extend range
    Correct
  4. D
    Encode the message

Correct answer

Amplify and regenerate the signal to extend range

Explanation

Signals attenuate as they travel. Repeaters restore the signal level. In digital links, regenerative repeaters re-time and re-shape bits, preventing noise accumulation (unlike analog amplifiers which also amplify noise).

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