Why do FM radio stations end in odd numbers?

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FM radio stations end in odd numbers to prevent interference. The reason they are odd numbers rather than even numbers is that 1 (odd number) is the first number we start counting from, not 0 (even number).

FM radio stations in the U.S. transmit in bands between 88.0 megahertz (MHz) and 108.0 MHz. Inside this band, each station occupies a 0.1 MHz (100 kilohertz (KHz)) section. Each of these sections starts and ends on odd number boundaries.

Old school car radio
Old school car radio

This means there can be a radio station at 88.1 MHz, 88.3 MHz, 88.5 MHz, and so on. Skipping over the even numbered radio stations (88.2, 88.4, 88.6, etc. ) was done by the FCC to prevent radio stations from interfering with one another. Radio stations that are only 0.1 MHz (100 KHz) apart tend to bleed into each other more often.

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INTERESTING FACTS
  1. Many countries have radio stations that end in even numbers.
  2. Radio waves take about 8 minutes to travel from the Earth to the Sun.
  3. The word ‘broadcasting’, referring to radio transmissions, was originally an agricultural term used to describe the wide scattering of seeds.
INTERESTING VIDEO

INTERESTING REFERENCES
  1. HowStuffWorks – Why do all FM radio stations end in odd numbers?
  2. RadioDiscussions.com – Why do Radio Frequency’s always end in odd numbers?

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Rojgar Shekho

Hi
I have a rogue nissan 2017 with nav audio system, baught it in the states and shipped it all the way to middle east, the issue of odd numbers really annoyig me,is there anyway to fix it?