The baseband signal 𝑚(𝑡) shown in the figure is phase-modulated to generate the PM signal 𝜑(𝑡) = cos(2𝜋𝑓𝑐𝑡 + 𝑘 𝑚(𝑡)). The time 𝑡 on the x-axis in the figure is in milliseconds

Q. The baseband signal 𝑚(𝑡) shown in the figure is phase-modulated to generate the PM signal 𝜑(𝑡) = cos(2𝜋𝑓_𝑐𝑡 + 𝑘 𝑚(𝑡)). The time 𝑡 on the x-axis in the figure is in milliseconds. If the carrier frequency is 𝑓_𝑐 = 50 kHz and 𝑘 = 10𝜋, then the ratio of the minimum instantaneous frequency (in kHz) to the maximum instantaneous frequency (in kHz) is (rounded off to 2 decimal places).

Ans: 0.74 – 0.76