Error 20023 "The following conditions must be met: 0 < f_low <= f_high <= fs/2."

[derek.s]

Here is the vi

[RavensFan]

That's the same VI as message #1 and doesn't include your attempt at turning the data into a waveform.

Reread the last few messages, particularly mine about you dT values and the filter frequencies.

[altenbach]

First of all, replace your two filters with a single bandpass. No need to clutter the diagram.

You are only reading 10 samples, so the information content is low and filtering such a small part seems pointless. Get rid of all the express VIs and just use one of the ptbypt filters followed by the ptbypt peak detector that gives you a true whenever a peak is encountered. See how often these occur and you got your desired information.

Do you have some typical (simulated or real) data?

[derek.s]

Oh sorry my bad. Yes i read your message very carefully and did what you said. Now the original error doesnt pop up except a new error at peak detection vi. ive attached the edited vi. thanks

[RavensFan]

What does the new error say?  I can't run your VI without your subVI's.

[derek.s]

Yes im getting the signal from a pulse sensor through arduino to the pc

[altenbach]

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@derek.s wrote:

Yes im getting the signal from a pulse sensor through arduino to the pc

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Yes, we figured that out long ago. Are you responding to any particular posts here?

[derek.s]

At the peak detection vi it states Error 20013 ... Analysis: The widith must meet 0<widith<samples

[derek.s]

Yes yours and another person

[altenbach · Accepted solution]

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@derek.s wrote:

At the peak detection vi it states Error 20013 ... Analysis: The widith must meet 0<widith<samples

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On the first iteration, your collector has only 10 samples, but your width is 15.