Acquiring data with NI 9234 below 1652 Hz

[jorgepullin]

I am acquiring data from a seismometer using a NI 9234 DAQ. Its minimum rate of acquisition is 1652 Hz. However, I would like to save the data at a much lower rate,  around 100-200Hz. I understand this can be done using subset and resample. However, I find very little information or examples of usage of this module. Can someone point me to an example or give me some pointers to what values to use for the various parameters?

Thanks

Jorge

[ZYOng · Accepted solution]

See Using the Align and Resample Express VI or Resample Waveforms (continuous) VI. See the bottom of the Resample Waveform VI page for the examples.

Refer to the Resampling a Waveform (continuous) VI in the labview\examples\Signal Processing\Waveform Conditioning directory for an example of using the Resample Waveforms (continuous) VI.

[Jay14159265 · Accepted solution]

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@jorgepullin wrote:

I am acquiring data from a seismometer using a NI 9234 DAQ. Its minimum rate of acquisition is 1652 Hz. However, I would like to save the data at a much lower rate,  around 100-200Hz. I understand this can be done using subset and resample. However, I find very little information or examples of usage of this module. Can someone point me to an example or give me some pointers to what values to use for the various parameters?

Thanks

Jorge

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Hello, 

You can simply decimate the incoming data by a factor of 10 and you will get ~165 S/s check this out: 

(edit) set averaging to true and it will average over the decimation factor (10 samples in this case)

 

 

[jorgepullin]

@ZyOng, @Jay: Thanks!