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DAQmx PFIx triggered start: How to know exact trigger absolute time ?

Hello,

 

I stream data out of a DAQmx card PXIe-6363.

The generation starts when my card see a digital rising edge on PFI0.

It works great (confirmed with scope).

 

My questions is: I need to know the exact time the generation started. Currently I am recording the timestamp when I start the task, but the task could wait a second or two before it see a trigger. Is there a DAQmx property that records that? I am running the "DAQmx Wait Until Done.vi" at the end of generation, maybe I should record the end of generation timestamp and count backwards? Is there a better way?

 

Thank you in advance for your ideas.


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