Performance Evaluation and Robustness Testing of Advanced Oscilloscope Triggering Schemes

Abstract: In this paper, performance and robustness of two advanced oscilloscope triggering schemes is evaluated. The problem of time period measurement of complex waveforms can be solved using the algorithms, which utilize the associative memory network based weighted hamming distance (Whd) and autocorrelation based techniques. Robustness of both the advanced techniques, are then evaluated by simulated addition of random noise of different levels to complex test signals waveforms, and minimum value of Whd (Whd_min) and peak value of coefficient of correlation(COC_max) are computed over 10000 cycles of the selected test waveforms. The distance between mean value of second lowest value of Whd and Whd_min and distance between second highest value of coefficient of correlation (COC) and COC_max are used as parameters to analyze the robustness of considered techniques. From the results, it is found that both the techniques are capable of producing trigger pulses efficiently; but correlation based technique is found to be better from robustness point of view.

Keywords: Oscilloscope, Triggering, Weighted hamming distance (Whd), Autocorrelation, Coefficient of correlation (COC), LabVIEW^®, MATLAB^®

Click <here> or title of paper to download the full pages article (787 Kb)

Home - News - Links - Archives - Tools - Standardization - Patents - Marketplace - Projects - Wish List - Subscribe - Search - Membership - Submit Press Release

Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Sensor Jobs - e-Shop - Site Map