Fathom-X Tether to Multiple Arduinos

Hello, I’m running a Fathom-X tether to run three arduinos, two megas and one uno, on my ROV. But after installing the tether I’m having issues getting the signal to and from the computer over the tether. Before the tether, I used a ULink sender and receiver over an ethernet cable. The receiver then split the signal into 4 usb ports which were able to connect to the arduinos. After installing the tether, connecting the tether ethernet to the receiver ethernet I’m no longer getting a connection with the arduinos. I’m considering taking a ethernet to usb converter and connecting it to a usb splitter to achieve the same effect without the receiver. But I’m worried that this will cause the arduinos to lose power. Is there any way to get the signal with what I already have?