I see your problem. You are getting data in through something like a DAQ or VISA call and you just aren't getting enough points to make the measurements with this VI. You can either collect several of these together and then make the pulse measurement, you can tell the input to take longer (which sounds out of the question), or you can make the measurement some other way.
Which of the pulse measurements are you trying to make? Period is 1/frequency. If you know the frequency through other means, you can just invert for period. To measure period you need at least one complete cycle. Pulse duration (pulse width) can be calculated by finding the rise to fall edge times. Duty Cycle is (pulse duration / period)* 100. The *100 makes it a percentage. I am not sure what else to tell you. Good luck.
