How do I increase the precision of a timestamp acquired with a DAQ task?

[brinda]

Hi

I am using a DAQ task to acquire multiple channels of analog data. The waveform data already has timing information incorporated into it. I wanted to know if there was a way of increasing the accuracy of this timestamp information - (Its currently in seconds with a default ms offset for each sample).
Thanks
Brinda

[JaredA]

Hello Brinda,

From your posting, it sounds like you are acquiring some waveform data and plotting it to a LabVIEW graph. Unfortunately, the ability to increase the timestamp of your acquired data is going to be a limitation of using a non-real time operating system such as Windows. You may have a device which can sample to some very small precision of accuracy, but if your OS is not able to transfer the data fast enough and timestamp it, then you will see a less precise timestamp than you were hoping. A workaround to get around this would be to use a real time environment and the LabVIEW Real Time module. If this does not seem to be an option, you may also want to consider trying to use a counter to perform the timestamping.


Best of luck.

Jared A