5122 Analog Edge Trigger not working as expected

[michael.tammen]

I've created a VI that I think should be triggering on the analog edge of a signal.  I would like it to emulate exactly what the NI-Scope SFP does when it is configured to capture data using the edge trigger.  By this I mean I would like the data on the graph to stay the same until I hit the stop button, or change the trigger level/polarity. 

In my VI it seems that the digitizer is using the immediate trigger.  I'm not sure how to solve this problem.

[Jordan F]

Hi Michael,

I checked out your program and I do not see any inital problems with what you are doing in the code.  However, I would recommend to check out the niScope EX Configured Acquisition vi in the NI Example Finder.  This has all the same initial steps as what you are doing in your program so you can see if you get the desired behavior when running it. 

When you are setting up the trigger you select either a rising/falling edge, reference/start/immediate/etc., and the trigger level.  So, what is the trigger level you are setting and when do you plan to see this trigger condition be met?  What is the signal type and voltage you are measuring?  How do you know that the trigger is immediate in your program?   

I would recommend to check out the example I referenced above to see if you can get desired behavior and use that as a model for your program.