Quote Originally Posted by BobJ View Post
You reminded me that I have this Brookhouse mux. The digital display was an option and can be plugged into the mux to help diagnose issues. I ended up not using it and now Rags is almost entirely NMEA 2000. Will sell for a modest contribution to the boat kitty.
I have that same unit, it works quite well but you may have to pay some attention to signal levels and possibly not connect all the ground wires from signal sources... although it is very possible that some problems I had (and solved) were really due to noncompliant hardware from other manufacturers. If you monitor with NavMonPC you don't need the display, there are debug screens to see raw data from all ports.