RIGOL  Chapter 5 Trigger 
5-14  MSO4000/DS4000 User’s Guide 
source. 
 
2)  Turn TRIGGER 
  LEVEL to adjust the trigger level (when the trigger 
source is CH1 to CH4 or EXT) or threshold level (when the trigger source is 
D0 to D15) (please refer to “
Trigger Level/Threshold Level”). The 
current trigger level/threshold level is displayed at the upper-right side of 
the screen.   
 
2.  Specify the pulse width condition 
Press When, turn the multi-function knob   to select the desired pulse width 
condition and press the knob. You can also press When continuously to switch 
the current pulse width condition. The pulse type of the pulse width condition 
currently selected is displayed at the upper-right side of the screen.  
  : trigger when the positive pulse width of the input signal is greater 
than the specified pulse width setting. 
  : trigger when the positive pulse width of the input signal is lower 
than the specified pulse width setting. 
 
: trigger when the positive pulse width of the input signal is greater 
than the specified lower limit of pulse width and lower than the upper limit 
of pulse width. 
 
: trigger when the negative pulse width of the input signal is greater 
than the specified pulse width setting. 
  : trigger when the negative pulse width of the input signal is lower 
than the specified pulse width setting. 
 
: trigger when the negative pulse width of the input signal is greater 
than the specified lower limit of pulse width and lower than the upper limit 
of pulse width. 
 
3.  Specify the pulse width range 
The pulse width range is related to the current pulse width condition setting.  
  When the pulse width condition is 
,  ,   or  , 
press Setting and turn the multi-function knob   or the inner knob of the 
navigation knob to adjust the pulse width at a relatively smaller step or turn 
the outer knob of the navigation knob to adjust the pulse width at a 
relatively larger step. The range available is from 4 ns to 4 s. 
Note: The larger the rotation amplitude of the outer knob of the navigation 
knob is, the faster the variation of the value will be. When you need to 
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