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FM broadcasting occupies which band?

  • A.174 to 230 MHz
  • B.88 to 108 MHz
  • C.540 to 1600 kHz
  • D.10.7 MHz to 21.4 MHz

Answer: B

The band is 88 to 108 MHz in most of the world, with 200 kHz channels accommodating Carson's 180 kHz and a guard band. 540 to 1600 kHz is the medium-wave AM broadcast band. The 10.7 MHz figure is the FM receiver's intermediate frequency rather than a broadcast band. And 174 to 230 MHz is a television and digital radio band. These conventional numbers anchor every bandwidth calculation in the topic to real allocations. Framing the question as which quantity the change acts upon makes the answer follow without calculation.

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