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Communication SystemsReceivers

The main purpose of automatic gain control (AGC) in a receiver is to?

  • AMaintain a more nearly constant output level despite changes in received signal strength
  • BIncrease carrier frequency continuously
  • CEliminate the local oscillator
  • DCreate intentional aliasing
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Correct Answer: A. Maintain a more nearly constant output level despite changes in received signal strength
Explanation: AGC automatically varies receiver gain so large variations in received signal strength produce smaller variations in output level.
Reference: Standard communication systems: receivers
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