Access by pushing source button on TV remote and and finding the Live DMS listed proceeded by DLNA [I had to scroll through the source list all the way through once before they showed up one time]; press enter. It opens Media Play. Right arrow to Movie and press enter to see cable tv folder press enter again to get channel list and up arrow to movement bar which allow movement of 9 channels at a time. Down arrow to individual channel list and move to desired channel hit enter to open channel [also pressing the -> in the DVD controls area opens a channel]. Pressing return when a channel is playing returns you to channel list but any other key that functions generally sends you back to media play beginning or the source button will allow you to exit completely. Exit takes you back to previous source, pressing channel up down takes you to TV source.
Playback varies in quality of experience from channel to channel for the most part very nice. Some channels seem to have pixing issues from time to time. The worst channels started about 2 minutes into the play and would degrade quickly to a lot of pixing and the worst would studder with audio skips [one out of maybe 30 channels]. A couple seemed to have trouble initially starting with frozen video and audio and then skipping to a stream. One of these had a serious audio sync issue, retuning that channel did not help but changing to another channel that was in sync and then going back resolved that. Other than that audio playback is excellent in terms of the signal given to my 5.1 receiver.