Question

The message signal m(t) shown in the below is applied to an FM modulator m(t)

If the maximum frequency deviation of the resultant FM signal is 3kHz, then the frequency sensitivity of the FM modulator will be ______kHz/V..

Answer 1

$|m\left(t\right)|=2V$

$△f_{max}=3kHz=k_f|m\left(t\right){|}_{max}$

Frequency sensitivity $k_f=\frac{\Delta f_{max}}{m\left(t\right){|}_{max}}=1.50kHz/V$