Hi
I'm using chassis NI 9178 and unit NI 9421 and signalexpress. And I have a RPM sensor which output digital signal (pulse train), I would like to know the frequency of the signal. I used acquire signals ->DAQmx acquire->Counter Input Frequency measurement to measure the frequency. The problem here is that in the log file, it shows only iterations in X.axis, not absolute timestamp. Is there any way to set it correctly to get the right timestamp ? The reason I want the right timestamp is that I have some analog signals which have right timestamp (the X axis is time), and I would like to compare the analog signals with the frequency in the same time field. If the frequency measurement is not the one which I need, is there any other measurement I can use to get the frequency and log with the X axis of time?
Any answer or response is appreciate. Thank you for you time!
Mingyuexin