A New Design of Signal Source for Crosstalk Test of Multi-Channel Data Acquisition System

Abstract:

For the multi-channel data acquisition system, crosstalk significantly affects the sample accuracy. Through analyzing the mode of multiplexer and the sampling timing sequence, we demonstrated that crosstalk effect mainly results from the switch of multiplexer for the low- frequency multi-channel data acquisition system. A new crosstalk testing method based on phase-shift rectangular waveform for the multi-channel data acquisition system was proposed. The phase-shift rectangular waveform was designed. Experiments were conducted to test crosstalk effect of the multi-channel data acquisition system. The experimental results were demonstrated that the proposed approach based on the phase-shift rectangular waveform exhibits a distinct feature in effective channel crosstalk testing, compared with waveforms of other types. Thus, the proposed method is effective to detect crosstalk of the multi-channel data acquisition system.

• Periodical: Applied Mechanics and Materials (Volumes 246-247)
• Pages: 1012-1016
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.246-247.1012
• Online since: December 2012
• Authors: Yan Hu Shan, Yong Feng Ren, Guo Yong Zhen, Xin Quan Jiao
• Keywords: Crosstalk Test, Multi-Channel Data Acquisition System, Multiplexer Control, Phase-Shift Rectangular Waveform

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