Brookhouse Multiplexer

[Greggegner]

I have a Brookhouse multiplexer and had it connected to my Raymaine Seatalk gauges. I was able to get GPS info on the PC via the USB. The issue I had (before I disconnected it) was my C90W chart plotter showed my boat moving sideways on the chart. I have contacted Brookhouse but to date they have been no help. I am looking for ideas, nothing but Seatalk and the PC was connected to the multiplexer. Seatalk is connected to the C90W also. The issue went away when I disconnected the multiplexer.