采用计算机替代信号源，可产生20--20KHZ不连续正弦波。对出差在外的电子工作人员十分有用，用笔记本就可实现信号的产生，省去带信号发生器上门服务的麻烦。-Alternative source computer can have a discontinuous 20 20KHZ sine wave. Of electronic business trip staff very useful notebook can be used to