Fluke 190-104/EU 4-channel hand-held oscilloscope, ScopeMeter® 190 series II, hand-held 3894540 User Manual

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You can begin to display the waveform some time before 
or after the trigger point has been detected. Initially, you 
have a half screen (6 divisions) of pre-trigger view 
(negative delay). 

To set the trigger delay, do the following: 

 

Hold down to adjust the trigger 
delay. 

Observe that the trigger icon  on the screen moves to 
show the new trigger position. When the trigger position 
moves left off of the screen, the trigger icon changes into 

 to indicate that you have selected a trigger delay. 

Moving the trigger icon to the right on the display gives 
you a pre-trigger view. This allows you to see what 
happened before the trigger event, or what caused the 
trigger. 

In case of a trigger delay, the status at the bottom of the 
screen will change. For example: 

 

This means that input A is used as the trigger source with 
a positive slope. The 500.0 ms indicates the (positive) 
delay between trigger point and waveform display. 

When a valid trigger signal is found, the trigger key will be 
lit and the trigger parameters appear in black. 
When no trigger is found, the trigger parameters appear in 
gray, ands the key light will be off. 
 

 

 

 

Figure 24 shows an example of a trigger delay of 500 ms 
(top) and an example of pre-trigger view of 8 divisions 
(bottom).