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Signal Conditioning

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How can i use butterworth filter from data of visa

Hi,

 

I receive the digital data from visa.

 

I want to filter the signal in real time.

 

The sampling frequency of signal is 200Hz. 

 

But, the point by point butter worth filter don't filter the signal.

 

And I don't know how to use butter worth filter from visa. (actually can't convert element to 1D array like circular buffer)

 

How can i use filter?

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