函数信号发生器 可产生方波，三角波，正选拨，用示波器观察-Function signal generator can produce square, triangle wave, is selection, using the oscilloscope observation

实现基本示波器功能，可输出方波，三角波等基本波形并可实现信号采集-To achieve the basic oscilloscope functions, and can output square wave, triangle wave and the basic waveform can achieve signal acquisition