Matching DIAdem and FlexLogger FFT

Updated Nov 14, 2018

Reported In

Software

  • FlexLogger
  • DIAdem

Issue Details

I am doing a fast Fourier transform (FFT) in FlexLogger and it is not matching the FFT that I am seeing in DIAdem. What type of FFT is FlexLogger using so I can match the two? 

Solution

The DIAdem FFT Function type "Power spectrum", is the best match for FlexLogger's FFT Graph, with the FlexLogger FFT Graph Y-axis scaling setting "Output in dB" deselected (also known as "linear" scale).

Additional Information

One important thing to note is that the FFT in FlexLogger is being processed on the most recent set of data while that in DIAdem is the entire dataset that you import. 

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