RIGOL DG4000 Series - Manual (Page 146)

RIGOL Chapter 6 Sweep
DG4000 Series User’s Guide 6-12
When “Int” or “Manual” trigger is selected, press TrigOut to set the edge type of
the trigger output signal. The default is “Off”.
 Off: disable the trigger output signal.
 Leading: output the trigger signal at the rising edge.
 Trailing: output the trigger signal at the falling edge.