topic Re: Multiple sampling - different frequency in LabVIEW

Multiple sampling - different frequency

simo28 — Thu, 27 Nov 2014 15:52:43 GMT

How can I read data from 8 analog input voltage channels using the DAQmx, specifying different sample frequency for each channel?

When I open DAQ assistant, I can choose only one sampling frequence for all the channel.

But for example, if I would like to use 8 signals on the same vi for different purposes, using different sampling frequency, how do I do it? Will I need to use 3 DAQ assistant one for each channel?

Re: Multiple sampling - different frequency

GerdW — Thu, 27 Nov 2014 16:01:21 GMT

Hi simo,

you should use just one sample rate for all channels (usually the highest needed or possible) and decimate the signals as needed…

Re: Multiple sampling - different frequency

simo28 — Thu, 27 Nov 2014 16:04:57 GMT

Thank you!

How can I decimate the individual signals?

Re: Multiple sampling - different frequency

GerdW — Thu, 27 Nov 2014 16:06:08 GMT

Hi simo,

there are several functions in the Signal processing functions palette…