I'm currently doing SI analysis of a SERDES link for one of our customers.
He has placed "beads-in-trace" on these lines.
These things are soldermask openings, with some solder on them, so they can use these for testing.
Although they should have a negligible impact on SI (see 4.5 in attached document), our customer would like them included in the simulation.
Is something like this possible using Hyperlynx GHz?