函数发生器能够提供正弦波、余弦波、方波、三角波、上弦波等几种常用标准波形，产生其它波形时，需要采用较复杂的电路和机电结合的方法-This can be avoided paralysis of the master, lead-ing to the collapse of the entire communication system defects, which played a very good role on improving the independence and reliability of the system