I have a PCI-1200 I/O board and have set up a digital output line and an anolog output line successfully, but I can't figure out how to count pulses coming from an instrument. I had used the Count Edges(DAQ STC).vi with the PCI-MIO-16XE-50 board (which was damaged and can no longer be used), but the source selection on that vi doesn't have the PCI-1200 channels. thanks a bunch!!