Samsung SIR-T351 ATSC (HD) Tuner
likely defective
picked one up at a local store. Same price as Internet.  Tv could see box but samsung couldn't see antenna signal.  Tried many times but it just kept saying no signal.  Put coax to TV - works fine. Put coax to unit - no signal. You need a signal to even get it to tune to a channel so there was no way to manually look at a specific channel to see what might be of issue.  It showed that it added channels that don't exist locally but they weren't in the channel menu afterwards.  I took it back.  Like everything Samsung I've ever had, quality is questionable in my opinion.  $350 is a lot of money to spend on something that is dead out of the box.  I am highly disappointed because most of the retailers here carry that unit or nothing for over the air broadcast - that or you subscribe to direct-tv which at $600 per year is too steep for my bank account. (In my lifetime that will be about $30,000 to watch TV assuming prices stay constant. Way too expensive.)