Maximum frequency deviation and the maximum bandwidth in commercial FM broadcast
Maximum frequency deviation and the maximum bandwidth allowed for commercial FM broadcast is
a) 80KHz, 160Khz
b) 75KHz, 200Khz
c) 60KHz, 170Khz
d) 75KHz, 250Khz
Correct Answer: b) 75KHz, 200Khz
Maximum frequency deviation allowed for commercial FM broadcast is 75KHz. Therefore approximate bandwidth allowed is 2*75= 150KHz. Guard bands of 25KHz are allowed on the either sides so the channel width becomes 2(75+ 25) = 200KHz. The guard bands are added to prevent the interference between adjacent channels.