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Communication SystemsReceivers

In a superheterodyne receiver, increasing the intermediate frequency generally improves?

  • AImage-frequency rejection for a given RF selectivity
  • BAudio output power automatically
  • CModulation index of the transmitter
  • DSampling resolution
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Correct Answer: A. Image-frequency rejection for a given RF selectivity
Explanation: A higher IF increases image separation from the desired RF signal, which can make image rejection easier for a given RF front-end selectivity.
Reference: Standard communication systems: IF trade-off
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