摘要
简要介绍了虚拟仪器的组成，基于LabWindows／CVI和NI公司生产的多功能数据采集卡PXI-6670E，设计了一个虚拟数字示波器。该系统功能强大，不仅具有实时采集功能，还具有频谱分析、加窗处理、滤波功能和数字存储功能等。
The composition of Virtual Instrument （VI） is introduced. A virtual digital oscilloscope based on LabWindows/CVI and multi-function card PXI-6670E produced by National Instruments （NI） Company is designed. This system has powerful function. Not. only has the function of data acquisition in real-time, but also has spectrum analysis, adding windows treatment, filter and digital storage.
