My set is an Olevia 437. Unfortunately the manual says it doesn't have QAM tuner. But I've verified from posts here that it does. I'm not sure if it is QAM-64 or 256. In terms of stations, I do know exactly which stations I should get. They are listed here on this site...http://home1.gte.net/res18h39/channels.htm
From the column on the left (listed as "Over the Air"), I get:
I've verified from other postings that 11.x and 50.x were taken off the cable.
From the right column ("Time Warner Cable"), I can tune in every physical QAM channel that has a corresponding analog channel. Such as 89.11, 78.11, 78.10,118.11. But not channels like 113.X.
I've verified that all these channels (including the "Over the Air") are in fact coming from cable by disconnecting the cable and trying to program "over the air". I just got a very limited amount of channels (none of the digital ones came in).
It really has me perplexed as to why I can't get these in. The friend of mine who I mentioned can get these channels also has an Olevia although it is 2 series (and smaller). I google'ed low pass filters to see if I could find any that might be causing this. All the models I found cut off channels that I am currently receiving. I still think that some kind of filter is being used to prevent the signal from reaching me. I may not be finding the exact filter when I search. Or maybe TWC has the ability to turn off specific unencrypted signals.
Thanks for the info. This is more of a curiousity for me (plus I'd like to get ABC/FOX-HD). Once fall rolls around however, I'll be renting a STB so I can get some of the premium sports channels anyway.