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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Research on a Method to Increase Waveform Capture Rate
Author(s)
Qin-chuan Zhang 1 and Min Li2
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DOI:10.17265/1548-7709/2011.12.009
Affiliation(s)
1. College of Automation Engineering, University of Electronic Science & Technology of China, Chengdu 611731, China
2. College of Computer Science and Technology, Sichuan Normal University, Chengdu 610054, China
ABSTRACT
Waveform capture rate is one of the key indices of
digital storage oscilloscope (DSO), which indicates mean speed of a system in
waveform capture in a unit time. The higher the waveform capture rate, the
larger the chance to capture abnormal event. In the article, statistic
histogram of waveform is established in the first place with random process
theory. On the basis of which, template for waveform detection is derived.
Cache architecture is then utilized to store sampling point of the highest hit
count in detection template, thus reducing the number of read-write access to
external memory when mapping waveform data, lowering down dead time and
increasing waveform capture rate. In conjunction with engineering application,
materialization and verification have been made upon detection-template-based
waveform rapid mapping technology, results of which demonstrate that the proposed
technology can increase waveform capture rate effectively and can improve cost
effectiveness of the related products.
KEYWORDS
Digital storage oscilloscope, waveform capture rate, dead time, histogram.
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