A:Answeri do not own this tv, but i am looking at it for my rv as a 12v tv, heres a link to a guy who has his run off 12v and he included links to 12v plugs from amazon in his video discription. i just thought this may help answer your question. https://www.youtube.com/watch?v=qNyZCzhuZCw&list=PLj_QqRdZjp_uyQKAeFKSn86-C5cQ2Q2Xb
A:AnswerThe number of channels the TV can recognize depends primarily on the kind of antenna used and its positioning. But it also depends on atmospheric and stratospheric conditions for the broadcast signal strength. Try repositioning the antenna and rescanning. Use the signal strength meter available in the Menu to help your adjustments.