An FM signal has a resting frequency of 105 MHz and highest frequency of 105.03 MHz when modulation by a signal of frequency 5kHz. Determine (i) frequency deviation and (ii) carrier swing.

Explanation

Resting frequency (f) = 105 MHz Frequency of the signal `(f_s)` = 5 kHz
Highest frequency of the modulated wave, `(f_m)` = 105.03 MHz.
Frequency deviation `= Deltaf = ?` Carrier swing (CS) = ?
Frequency deviation `(Deltaf) = f_m -f `
`Deltaf = 105.03 - 105 =0.03 MHz `
Carrier swing `= 2 xx Deltaf = 2 xx 0.03 = 0.06 MHz `
` = 60 kHz`.