Eye Diagram Signal Integrity Analysis Basics Series 1 - About Eye Diagram Measurement (Part 1) Wang Jinjin Shenzhen Representative Office of Teledyne LeCroy Corporation Abstract: This article will start with the author\'s usual nonsensical style and introduce the relevant knowledge of eye diagram measurement from four aspects: 1. Background knowledge of serial data; 2. Basic concepts of eye diagram; 3. Eye diagram measurement methods; 4. Features and advantages of Teledyne LeCroy oscilloscopes in eye diagram measurement. It is divided into two parts, Part 1 and Part 2. Part 2 includes Part 3 and Part 4. Do you know? The history of eye diagram can be traced back to about 47 years ago. Before Teledyne LeCroy invented the method based on continuous bits to measure eye diagrams in 2002, the measurement of eye diagrams was based on the traditional method of sampling oscilloscopes for 40 years from 1962 to 2002. Do you believe it? In long-term training and technical support work, we found that few engineers can fully and accurately understand the measurement principle of eye diagrams. Many engineers are often satisfied with the measurement guides provided by various standard authorities, step by step, and the Pass or Fail conclusion given by the eye diagram measured by the \"universal\" Sigtest software. This obsession with Sigtest has even made some engineers forget that the eye diagram can be used as an important debugging tool. Before I came to LeCroy for an interview in 2004, I had never heard of eye diagrams. During the interview that day, the boss repeatedly emphasized LeCroy\'s advantages in eye diagram measurement, but I didn\'t understand what he meant. After that, I Googled \"eye diagram\" and saw a limited number of articles on the Internet, but I still didn\'t understand. Just now I Googled \"eye diagram\" again, and still didn\'t find even one article that thoroughly explained the eye diagram measurement. The text about eye diagrams found on the Internet, the most frequently appearing is as follows, which seems to be very professional, but it refuses our interest in reading. \"In actual digital interconnection systems, it is very difficult to completely eliminate inter-symbol crosstalk, and the impact of inter-symbol crosstalk on bit error rate cannot be found in mathematically easy-to-handle statistical laws, and cannot be accurately calculated. In order to measure the performance of baseband transmission systems, in experiments...
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