The TV's antenna cable has two ends. Forget the TV end, go for the other end. Usually it's at the antenna amplifier and power port near the TV. Connect the converter there...
Test & System Engineer (Thermal Systems incl. towing, Detroit 3) 2003 Damon Challenger 348 Class A - F53 Triton V10
If you connect the converter at the "power port" then all TV's (assuming you have more than one) will have to watch the same channel. While it's possible to isolate the lead going to the TV in question your best bet is to connect the converter at the TV. It may perhaps be hard to move the TV to get behind it but this is still the best bet. Also in our former TT the "power port" was behind the main TV so I would still have had to move the TV. If, in our fiver, we put the converter at the "power port" we would have to get up and go into the bedroom to change channels. Move the TV and hook it the way it should be and you'll be a lot happier in the end.
Dave & Dee
2006 40' Open Road
2008 F-350 Dually V-10 4:30
2 yrs USA Big Red One Vietnam Retired USAF
Retired teacher after military