What's generally true is that multifunction boards that support hardware timing for digital acquistion will support that feature on the port 0 lines. These will be designated in the pinouts you find in MAX as P0.0, P0.1, etc. to represent Port 0 Line 0, Port 0 Line 1, etc.
Change detection is one of the kinds of hardware timing that your X-series board will support, but you'll need to bring the signal in to one of the port 0 lines as your colleague alluded to.
Understand that sampling based on change detection will occur immediately after the digital transition you specify (probably rising edge). If you need to delay your sampling until a little further into the high time of the external signal, as you might need in a stimulus-response characterization, there are some further things you can do by setting up a retriggerable pulse with one of your board's counters. I won't go into it yet because I'm short on time now and you may not need it anyway.
-Kevin P
CAUTION! New LabVIEW adopters -- it's too late for me, but you *can* save yourself. The new subscription policy for LabVIEW puts NI's hand in your wallet for the rest of your working life. Are you sure you're *that* dedicated to LabVIEW? (Summary of my reasons in this post, part of a voluminous thread of mostly complaints starting here).
