Some MH that have a switch that changes between the over the air antenna amplifier and the cable TV connection can have circuitry that blocks either the power to the Tailgater or the signal from the Tailgater. This is usually a switch with a light nearby located near the front TV. Others witch such a switch report no problem.
On my coach I don't have such a switch - the Tailgater to the cable TV connection in the equipment bay and it works perfectly.
Try it and see what your results are. If it does not work you may have to do some modifications. If it does you are golden.
We enjoy the Tailgater. Works well, easy setup and reasonably priced.
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.