Originally Posted by RSawdey
I think the definition of STB is much broader, 'set top box' could be any kind of external tuner device...
All the HD STBs have analog outputs, so all can function as 'downconverters' of digital signals for sets with only analog inputs.
My bad. I was not thinking broadly enough and was only considering the STBs we have been using to view HD OTA. So you will need a box that has an ATSC tuner.