Eye Diagram Of Oscilloscope. To display the eye diagram the clock recovery unit cru is used to recover the data clock from the tmds clock see fig. Most eye diagrams are composed of shallow amounts of data.
Then successive waveforms accumulate to form a composite image in the manner of tracks in the snow. An eye diagram is a pattern shown on an oscilloscope that depicts a fuller view of what a digital signal stream looks like from a more holistic viewpoint one could say. The eye diagram allows for quick visual inspection of the signal quality of high speed serial signals.
An oscilloscope generates an eye diagram by overlaying sweeps of different segments of a long data stream driven by a master clock.
Specification for measurement of the tmds eye diagram source. An eye diagram results from superimposing the 0s and 1s of a high speed digital data stream. The answer is the oscilloscope utilizes a built in clock recovery system. Shown here are two displays from a sampling oscilloscope.