RIGOL 
 ©   2007  RIGOL  Technologies,  Inc. 
  User‟s Guide for DM3000 Series 
External Triggering 
  is used to set the parameter which initiates the triggering function. It requires to 
set  the following  parameter: the  Rise  edge, the  Fall  edge,  HiLev (high  level) and 
LoLev  (low  level).  Press  Done  to  start the external  triggering,  the  keys    and 
  on the front panel will be off to indicate the instrument using external triggering 
mode. 
 
Press     Ext, the display shows: 
 
Figure 2- 22 The Interface of the External Triggering 
 
Triggering modes: the rise edge, the fall edge, high level and low level.