Guard bands are provided in FM signal to

Q.  Guard bands are provided in FM signal to
- Published on 14 Oct 15

a. Prevent interference from adjacent channels
b. To increase the noise
c. To increase bandwidth
d. None of the above

ANSWER: Prevent interference from adjacent channels
 
The guard bands are provided to prevent the interference between adjacent channels in FM signals. Guard bands of 25KHz are allowed on the either sides so the channel width becomes 2 (75 + 25) = 200KHz where 75KHz is the maximum permissible frequency deviation allowed for commercial FM broadcast.

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