GDC SX-2001A SERIES User Manual page 24

2. SMS
(c) The Selected Playlist column on the right displays the clips in each playlist.
(d) If you want the playlist to loop for a period of time, check
and time to end the loop.
(e) Press Add after the schedule date/time is fixed and playlist is selected.
(f) If the new show schedule does not conflict with other schedules already saved to the
server, the schedule will be added to the existing list of schedules in the server.
Loop Until and indicate the date