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