User Manual: Capture device utilities
From MythTV Official Wiki
DVB-apps
...
Resources
working with channels.conf files - http://www.mythtv.org/wiki/index.php/Adding_Digital_Cable_Channels_%28For_ATSC/QAM_Tuner_Cards_--_USA/Canada%29#channels.conf_Format
channels.conf format - http://www.vdr-wiki.de/wiki/index.php/Channels.conf