I have dish network, a new vizio 50 in smart hdtv with wifi....how do I watch digital over the air channels? My understanding is my new tv has a digital tuner in it already, but do I still need help! I tried scanning like it states to find digital programming in my area, but no joy....Do I simply need a digital antenna? And if so, does it have to be some giant behemoth up on the telephone pole (used to be for tv b4 dish, lol), or can it be in the house? I recently purchased that clear tv antenna as advertised on tv....will that suffice? Help!