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Which is the best summary of the FM bargain?

  • A.Spend bandwidth to gain noise performance
  • B.Spend power to gain bandwidth
  • C.Spend receiver simplicity to gain efficiency
  • D.Spend frequency accuracy to gain bandwidth

Answer: A

FM spends spectrum and buys output signal-to-noise ratio, an option the amplitude family does not offer at all, and it does so while keeping a constant envelope that permits efficient amplification. The other formulations mismatch the currencies: bandwidth is what is spent rather than gained, and while receiver complexity does rise, it is not the principal cost. Naming the bargain in one sentence is the most useful single thing to carry away from the topic.

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