实现仿真信号的生成，实际信号的数据采集，同时观察信号的波形，存储、回放信号的波形，并利用FFT对所得仿真信号、实际信号进行频谱分析进而得到信号的频谱。

-Simulation signal generator, the actual signal data acquisition, while observing the signal waveform storage and playback signal waveform using FFT spectrum analysis and then get the signal spectrum obtained simulated signal and actual signal.