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Communication SystemsReceivers

In a superheterodyne receiver, using a lower intermediate frequency generally makes it easier to obtain?

  • ABetter adjacent-channel selectivity
  • BLarger image separation
  • CHigher antenna gain
  • DHigher transmitted power
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Correct Answer: A. Better adjacent-channel selectivity
Explanation: A lower IF permits narrower practical IF filters and can improve selectivity, although it worsens image-frequency separation.
Reference: Standard communication systems: IF selectivity trade-off
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