EYE Diagram

Eye Diagram – An eye diagram is used in electrical engineering to get a good idea of signal quality in the digital domain. To generate a waveform analogous to an eye diagram, we can apply infinite persistence to various analog signals a well as to quasi-digital signals such as square wave and pulse as synthesized by an arbitrary frequency generator (AFG).

Here, the bit sequences 011, 001, 100, and 110 are superimposed over one another to obtain the example eye diagram.

The eye diagram takes its name from the fact that it has the appearance of a human eye. It is created simply by superimposing successive waveforms to form a composite image. The eye diagram is used primarily to look at digital signals for the purpose of recognizing the effects of distortion and finding its source

Sockets and interconnects will introduce reflections and signal loss and distortion into the SerDes channel. Socket pins are passive elements and will always add to the total channel eye closure. Key issue for a socket pin is to not reduce the eye opening enough to cause the part to fail.