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Communication SystemsReceivers

For a superheterodyne receiver using high-side injection, the image frequency is separated from the desired RF frequency by?

  • AfIF/2
  • BfIF
  • C2fIF
  • D4fIF
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Correct Answer: C. 2fIF
Explanation: With high-side injection, the image lies at fRF+2fIF, so its separation from the desired station is 2fIF.
Reference: Standard communication systems: receivers
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