A FM (frequency modulation) signal x(t) is given by
x(t) = A * cos(2Ï€fct + 2Ï€Tk * m(t))
where:
A = 10 volts
fc = 477.15 MHz
m(t) = cos(2Ï€fmt) volts
fm = 3.1 kHz
Assume that the signal bandwidth of an FM signal is determined by Carson's Rule, which states that the FM bandwidth, Bm, is given by Bm = 2(f + fm), where Af is the peak frequency deviation from the center frequency of the modulated signal, and fm is the bandwidth of the low-pass modulating signal.
The required modulated FM signal bandwidth for a particular design is Bm = 12.5 kHz. What is the required numerical value of the constant, k, in Hz/Volt to satisfy the FM bandwidth requirement?