So recently I raised a mentor support ticket how can I quantify the effect of a high-speed signal crossing a split plane on a PCB with a star ground. I got a reply from Mentor that you can not do it in Hyperlynx however you can do it in a 3D EM field solver. Has anyone here done a simulation similar in the 3D EM field solver to "quantify the effect of a high-speed signal crossing a split plane"? I am curious as to what the results were and how to set up a simulation and try my self. Is there already an existing simulation or a tutorial on how to create such a simulation in the 3D field solver?