Hi everyone, I am using a 9188 cDAQ and I'm acquiring more signals at different rate using DAQmx functions. I would like to get the measurements synchronized and be able to create an XY graph with correlated signals in order to know what was the value of one measurement when another one is at a certain value. I don't really know how to do that synchronization; for now I'm using a while loop for every signal to read an array of different lenght, couse I don't want to stress the PC with a buffer too wide. I thought I could write also timestamp in the acquisition, and use interpolate function to set a signal based on other signal's time, but then I don't know how to correlate them at last. Does anyone know how can I do that? Thank you very much for your attention. Best regards Francesca

Hello all, Just to make sure we're not overcomplicating things, I'd like to clarify the objective with OP. Francesca, Is time truly relevant for your application? That is, will your x-axis plot time (i.e. in seconds) or simply the number of times the digital signal has gone high? If you only want to know what the analog signal looks like when you see a digital transition and you don't care how much time passes between each of those transitions, you could just use the digital signal as the sample clock for your analog input. If you do indeed care about how much time passes between each point on your plot, ignore my post entirely -- Kevin's suggestions are right on.

Multifunction DAQ

DAQ acquisition

Solved!

Hi,

Can I use a USB-6003 for logging data from 4/5 thermocouples or it can be used for logging only one source at a time?

Message 11 of 11

(666 Views)

Multifunction DAQ

DAQ acquisition

Re: DAQ acquisition