Add low pass filter to analog input for AD2 in WaveForms SDK

[Ammar Kh]

Hi

I am working on an application where I need to filter some white noise when reading analog data on the AD2 scope channels.

In WaveFroms GUI there is the option to add a math (software based filter channel) with low pass filter.

As I am using python for the test automation. is there an API function to apply such software based filter at the input

I attach an image below for reference. I am looking after to get the filtered output in my test script.

Thanks 

Edited February 26 by Ammar Kh
add image

[attila]

Hi @Ammar Kh

You could use SciPy

[Ammar Kh]

@attila Thanks. I will try with https://docs.scipy.org/doc/scipy/reference/generated/scipy.signal.butter.html

One more question. if I am having the AD 3 / AD Pro instead. Can I simply use the FIIR filter functions from the SDK to set a low pass filter window ?

I am referring to these functions in specific:

FDwfAnalogInChannelFiirSet

FDwfAnalogInChannelWindowSet

 

 

 

 

[attila]

Hi @Ammar Kh

Yes, the filter channels are performed in the hardware. Note these are optimized for high frequency, the FIR has only 16 taps.