已经是成品了，是三角波测量仪，可以测任意波形频率和幅值，占空比，并自带三角波发生器可以调幅度 0~100占空比 发生频率步进可调，绝对高精度， 里面还有报告-Is already finished, and is a triangle wave measuring instrument can measure the frequency and amplitude of any waveform, duty cycle, and comes with triangular wave genera