Powering fathom x from tether

[StrikeLines (Travis Griggs)]

I have successfully done what you are describing at 140VDC to power a side scan sonar towfish.

How to wire Fathom X pair for 140VDC power and communication

I am trying to repair my side scan sonar towfish which has a failed ADSL communications board. The sonar is powered via 140VDC from the topside unit, transmitted down a 100m coaxial tow cable. I’ve read that a pair of Fathom X boards can be used to transmit data over a line that is energized with AC or DC power, and I’ve ordered a pair of the boards to give it a shot. My question is: How do you wire the Fathom X boards to either end of the 140VDC cable? Are all of the necessary components buil…