说明：  设输入信号为m（t），载波中心频率为10Hz，调频器压控震荡系数为5Hz/V，载波平均功率为1W,求出调频信号的波形，求出调频信号振幅谱，用鉴频器解调该信号。
(Assuming the input signal is m (t), the carrier center frequency is 10 Hz, the voltage-controlled oscillation coefficient of the frequency modulator is 5 Hz/V, and the average power of the carrier is 1 W, the waveform of the frequency modulation signal is obtained, the amplitude spectrum of the frequency modulation signal is obtained, and the signal is demodulated by the frequency discriminator.)