Televisions (recent activity)

I have a Magnavox DVR with an SD tuner built in. I've noticed a few extra channels showing up that didn't appear without the DVR's tuner.
Televisions 1 answerANSWER NOW!
But I'm having trouble receiving anything. Can it be used with a roof top antenna or will I need a set top descrambler? There are some hills nearby; could they be the problem? I'm in New Jersey if that matters. The broadcaster is maybe 30 miles away.
Televisions 1 answerANSWER NOW!
My television (bought in 2004) is "HDTV ready" but I don't know what that really means.
Televisions 1 answerANSWER NOW!
If I get a stand-alone HD tuner and attach it to my old TV, can I use my old roof antenna with the HD tuner or will I need to get some sort of new digital antenna?
Televisions 1 answerANSWER NOW!
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