I recently purchased a new Vizio HDTV with a QAM tuner. How do I find out the channel listing of Time Warner's OTA channel numbers to program my new TV for HD? I have scanned the channels with the standard coax connection, and it identified some digital channels, but they do not appear to be an HD broadcast.

If you have the cable connected to the HD set, and do a channel scan, that should show all the HD channels available on your cable system.

They may be on vastly different numbers than the analog ones; once the scan is done, look at all programmed channels.

Got to titantv.com and get the listing of the digital channels available in your location OTA. If none are available then your cable provider does not have to supply them unencrypted.