Dan Dvorscak
Ansys Employee

In a single eye diagram, the only way to do that is to use the same UI for both. In this case, set them both toe 1.25ns. You will have two cycles worth of eye diagrams for the 0.625ns UI on in that case, of couse. 

Alternatively, you can create a stacked eye diagram report type and then the two eye diagrams will be displayed full width, but with one abouve the other.