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Communication SystemsReceivers

A receiver is tuned to 1 MHz and uses a 455 kHz IF with high-side local-oscillator injection. The local oscillator frequency is?

  • A455 kHz
  • B545 kHz
  • C1.455 MHz
  • D2.455 MHz
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Correct Answer: C. 1.455 MHz
Explanation: For high-side injection, fLO=fRF+fIF=1.000+0.455=1.455 MHz.
Reference: Standard communication systems: receivers
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