Hello, I'm using a U3 in a system that has a pretty tight requirement for the propagation delay. I am measuring this propagation between a digital input on one LJ channel, my LabWindows software reading this state and then setting a different LJ digital output channel.
It is important in my application that this delta be in the low miliseconds, but I am measuring anywhere from 5 to 25ms on a very fast Windows 7 desktop. On another slower Windows XP machine, this same experiment runs as slowly as +100ms.
I have found a few threads here that are similar to what I'm after, but not exactly. I am wondering if this is purely the fault of the interface between the LJ and my target PCs, and the Nation Instruments software running on that target PC? I realize there's a lot of overhead between points A to B. But was just curious if there are low level settings that I should be configuring at the LJ level.
Gregs desktop - best case.BMP 300.05KB 530 downloads
Gregs desktop - worst case.BMP 300.05KB 529 downloads