Xantech product is typically rock-solid, so if it's crapping out, I'd assume it's the Anthem that's causing it. Static problems are not impossible, but it'd be a first for me.

I would remove the Xantech stuff from the Anthem & put in a 789-44 connecting block. It's not expensive, and it will verify as to whether the Xantech product is clashing with the Anthem somehow. It may not like the dual emitters, or it's 12VDC power may not be regulated. Use your multimeter to check its output voltage... if it reads over 13V, it's probably not regulated. This is the same reason Xantech emitters don't last long when connected to Niles repeaters. I browsed through the manual, and it doesn't mention the words Xantech or regulated anywhere.

It would be a shame to find that this built-in repeater isn't Xantech-compatable. The Anthem's a great piece, isn't it?

Doug @ HomeWorks