An FM transmission has a frequency deviation of `18.75 KHz`. Calcualte present present modulation if it is broadcast in 88- 108 MHz band.
An FM transmission has a frequency deviation of `18.75 KHz`. Calcualte present present modulation if it is broadcast in 88- 108 MHz band.
A. `37.5%`
B. `12.5%`
C. `50%`
D. `25%`
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Correct Answer - 4
Carrirer Saving `= 2 xx Deltaf= 50 KHz`
Perecnt modulation `m=Deltaf xx 100`
`= (18.75)/(75)xx100`
`=25%`
As maximum devation of 75 KHz is allowed for FM b
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