What I'm trying to do is to start taking a specific number of samples from 2 analog inputs, and half a second later turn on a digital output, and again turn it off a user specified amount of time later. What's happening is that the analog sampling prevents any control of the digital outputs while it is sampling. What this is trying to acomplish is this: I want to start recording values, and a short time later I want to send the signal for the actuator that I am measuring to actuate. I am attaching the vi that I am testing with. I have the timing etc. figured out and once I can get this part to work, I can put them together.