Basic Operation 
DSO4000 Series Digital Storage Oscilloscope     26 
With Pulse highlighted, the trigger occurs on pulses that meet 
the  trigger  condition  (defined  by  the  Source,  When  and  Set 
Pulse Width options). 
Select the input source as the trigger signal. 
Select the trigger condition. 
With  Set  Pulse  Width  highlighted  by  pressing  F4,  turn  the 
multi-functional knob to set the pulse width. 
Select to trigger on positive or negative pulses. 
Select the type of trigger. The Normal mode is best for most 
pulse width trigger applications. 
AC 
DC 
HF Reject 
LF Reject 
Select  the  components  of  the  trigger  signal  applied  to  the 
trigger circuit. 
Switch between submenu pages. 
Trigger When: The pulse width of the source must be ≥5ns so that the oscilloscope can detect the 
pulse. 
 
=, ≠: Within a ±5% tolerance, triggers the oscilloscope when the signal pulse width is equal to 
or not equal to the specified pulse width.   
Triggers when pulse is 
equal to width setting ±5% 
Triggers when pulse is 
greater than width setting 
Triggers when pulse is not 
equal to width setting ±5% 
Triggers when pulse is 
less than width setting