Wow. This is so far up my alley that my masters thesis was on implementing testing from 802.3bj and I have made passive microstrip filters in a class.

It’s cool that he simulated the eye diagrams, and getting your hands on a real transmitter is not easy, but I think it ends up being a little too optimistic. I don’t think this is meant to demonstrate a real world channel or else he could have just pulled IL and RL limits from various specs. Really cool stuff though.