By measuring the "eye diagram", we can analyze the quality of the high-speed signal. The following is an explanation of how to look at the eye diagram
Here is the conclusion
The larger the eye height and eye width, the more symmetrical the duty cycle, and generally the better the signal quality.
![](https://img-blog.csdnimg.cn/img_convert/849f574f4bc6fbac6fc8f106097e5207.png)
![](https://img-blog.csdnimg.cn/img_convert/69c429e0ee109301ecb29decc4fc571c.png)
![](https://img-blog.csdnimg.cn/img_convert/5fa919cd73f591cb00ec944ff771b259.png)