I have an HDTV. If i hook a antenna to the tv it shows digital channels. My question is if I bought a converter box like the TR-40, as I want to get guide information atleast a few days ahead, would the ouput from the converter be downgraded to SD or would the Signal be HD?
Thanks for your help.

TR-40 is a digital to analog converted, not an ATSC HD tuner.

You will get a beautiful 480i picture.

My DTV pal dosen't live up to the 7 day info. about 12-14 hours is all it is good for. I don't know if it is DTV pal or local broadcasters but it is just 1 more failing on this converter.

All ATSC tuners only receive the PSIP data that the stations transmit (virtually useless).

If you need longer term info try TitanTV.com

If you need longer term info try TitanTV.com
Or a TiVO.

My DTV pal dosen't live up to the 7 day info. about 12-14 hours is all it is good for. I don't know if it is DTV pal or local broadcasters but it is just 1 more failing on this converter.

It's not a failing of the converter, it's controlled by the broadcaster. If you're getting 12-14 hours you're doing good. Most stations don't broadcast guide info that far ahead.