FM radio waves and radio stations

  • Thread starter coktail
  • Start date
  • #1
118
1
Hi there. I have a (hopefully) quick question here.

FM radio stations transmit their information by manipulating the frequency of radio waves, but each radio station is assigned to a specific frequency. If the frequency broadcasted by a radio station is constantly changing (to transmit info), how is it that you stay locked in to a single station?

I hope that makes sense, and thanks!
 

Answers and Replies

  • #2
sas3
Gold Member
211
9
To modulate the signal FM radio station only use a deviation of 75 kHz from center frequency.
 
  • #3
118
1
Thanks!
 
  • #4
1,763
59
Each FM broadcast station is given a channel width of 200 kHz. As sas3 said the signal varies by up to 75 kHz from the center of the channel resulting in a occupied bandwidth of approximately 150 MHz with a guard band of 25 kHz on each side. Even with the guard band, stations on adjacent frequencies are spaced far apart geographically.
 

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