Calculation of carrier swing in FM wave

Q.  A 100MHz carrier is frequency modulated by 5 KHz wave. For a frequency deviation of 100 KHz, calculate the carrier swing of the FM signal.
- Published on 14 Oct 15

a. 2000 KHz
b. 100 KHz
c. 105 KHz
d. 200 KHz

ANSWER: 200 KHz
 
Carrier frequency fc = 100MHz
Modulating frequency fm = 5 KHz
Frequency deviation Δf = 100 KHz
Carrier swing of the FM signal = 2 * Δf
= 2 * 100
= 200 KHz

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