A quote from Cheezmo over at AVS
Cheezmo said:TNT-HD is up in test mode. It is on transponder C-8, sharing with the HD PPV Channel. That means HDNet has now moved to B-28 to share with ESPN2-HD and the various NBA-HD channels in the 90's (of course they can always shift them around when they go active). That could lead to all time low bitrates for HDNet in the evenings.
Details at http://www.widemovies.com/dfwbitrate.html
The only full time 3-per is still HBO-HD, SHO-HD, HDNet Movies.