Best way to make program wait for input from NI USB 9162?

Hi, I'm somewhat new to Labview, but through all the tutorials and online help I'm still having trouble getting this to function properly.
The USB adapter is hooked up to a network cable split into single wires reading in a voltage coming through several seperate oscillators.
Testing in the lab, the program included below works fine when I run the program, then quickly administer a shock to the table. In the real world scenario though, I'm trying to make the program wait to record data until the first shock reaches the first oscillator before recording data, but I just can't seem to find an easy way to make this work.
Attatched is an example of the program. Any help would be greatly appreciated. Thank you.
Attachments:
Acq&Graph Voltage-Int Clk-rh-tt-1.vi ‏56 KB

Hi,
I think I have the answer you're looking for! Please see the attached VI.
I moved the graph indicator inside the "true" case of the case structure. Before, your VI was sending data to the graph from an empty timestamp constant with each iteration of the "false" case. Now the VI only sends data to the graph if a true is read.
If you're wondering why it takes a bit of time for your graph to stop updating before it stops writing new data, it's because you're filling up a buffer of sampled data by using a queue. If you're writing to the buffer faster than you're reading from the buffer, you may encounter an "overflow" situation when the queue gets full. To avoid this, you might consider using a notifier rather than a queue. It's the exact same thing as a queue, but it gives you only the most recent value, allowing new values to overwrite old values.
Hope this helps.
Regards,
Dan Richards
Certified LabVIEW Developer
Attachments:
producer consumer DAQmx threshold.vi ‏57 KB

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