Read and understand about , REAL Digital Broadcast Tv Channels , Virtual Digital Broadcast Tv Channels , Analog Broadcast Tv Channels ,
http://forum.tvfool.com/showthread.php?t=695. Here are some tv guides ,
http://www.zap2it.com ,
http://www.titantv.com ,
http://television.aol.com ,
http://tv.yahoo.com ,
http://tv.entertainment.excite.com ,
http://tvzap.com. Most tv guides show the channels as virtual channels. Also please note that digital tv stations can begin broadcasting at any time and digital tv channels can be added to tv stations at any time with out prior notice , so is a good idea to scan for new digital tv channels.