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FFT with NI-4071 voltage measurements

Hello everyone, I’m looking for some advice as I am new to LabVIEW. I’m currently measuring resistance with an NI-PXI 4071 on test parts while sourcing current through them with a keithley power supply. I want to run these measurements through an FFT to analyze these measurements in the frequency domain to ensure we aren’t seeing excessive noise in these measurements. I’m semi-familiar with the FFT sub-vis in LabVIEW but I want to understand how to send this data through an FFT. From what I understand, the sampling rate is dependent upon the resolution. I also understand that this DMM also has noise reduction calculations for powerlines to dampen noise at 50 or 60hz. I’ve also read up on adjusting the aperture time, common-mode rejection, normal mode rejection etc. It’s all a bit overwhelming, but I just want to ensure that the measurements I am getting have the least amount of noise interference as possible. Does anyone have any experience with this DMM and have any VIs to share? Anything would be very helpful. Thanks

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Hi JohnDoe,

 

you asked the same on Reddit, but forgot to link to your question.

That's considered inpolite!

Best regards,
GerdW


using LV2016/2019/2021 on Win10/11+cRIO, TestStand2016/2019
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