基于LabVIEW的数字示波器上可编程触发功能的实现

Design of programable trigger function of oscilloscope based on LabVIEW

通信测试常常需要观察诸如噪声,毛刺等偶发事件,或是需要捕获具有复杂编码规则的信号,然而普通的数字示波器大都缺乏相应的信号触发能力。本文提出一个将数字示波器连接至个人电脑端,使用基于Lab-VIEW软件设计的程序,通过VISA命令控制数字示波器,实现可编程触发功能的方案。通过在程序中使用MATHLAB语言编程设置触发条件,通信系统测试能够精确地捕获所需信息。文中首先给出了方案的基本设计思想,然后分析实现编程触发功能的硬件原理,提出使用LabVIEW软件实现可编程触发功能的程序设计,并使用此程序实现依斜率触发的功能,展示编程触发的实现方式并证明此方案的可行性。

Communciation text usually needs to observe event happen on occation, as noise or burr. But most of the digital oscilloscopes haven＇t related trigger function. The article proposed a solution of operate the oscillscope to accomplish the programable trigger function through VISA command, with PC and labVIEW software. Such a flexable trigger function offers testers of communication systerm a way of catching the detail information needed more accuraeily. The article decribes the basic thought of the solution, and anlysies the hardware structure of digital oscilloscope, then explains the software program of the solution, finnally, article shows up the resule of slope trigger function using the solution this artitile advanced to prove up the practicability.