2009•Journal of Shaanxi University of Science & TechnologyRequires access

DESIGN AND IMPLEMENTATION OF VIRTUAL OSCILLOSCOPE BASED ON LABVIEW AND SOUND CARD

MA Li-ping

Abstract

Based on sound card digital signal processor technology and virtual instrument technology,this paper presents a low cheap solution of sound card based virtual oscilloscope,with its advantages of friendly interface,strong expansibility,wide dynamic range and steady performance.By programming sound card in LabVIEW,a virtual oscilloscope system is designed,the system can acquire signals in the frequency range designed for sound card accurately,and has the function of measurement and spectral analysis.

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Key concepts: Oscilloscope, Sound card, Interface (matter), Computer science, Computer hardware, Digital audio, Digital storage oscilloscope, Virtual instrument