LabVIEW

cancel
Showing results for 
Search instead for 
Did you mean: 

Unevenly sampled spectrum analysis

Hi, I have a Labview project where I need to compute the power spectrum of sampled voltage data that may or may not be evenly sampled, so I have collected a time stamp for each data point. I have been using the "Unevenly Sampled Signal Spectrum.vi" for this computation assuming that it could handling processing in both cases, unevenly sampled or evenly sampled. I am finding that the data which I know to be evenly sampled, processed with the "Unevenly Sampled Signal Spectrum.vi" gives me a different result then if it was processed with the normal "Power Spectrum.vi" which I usually use. The output looks similar when graphed, just the magnitude of the harmonic frequency components are about 1/10 of the values computed with the "Power Spectrum.vi". The magnitude of the dc component is about the same. Any idea why, are the output units the same for these two VIs?  
0 Kudos
Message 1 of 2
(2,439 Views)

Hi Dargm,

 

Please refer to this thread for information on the output units for both VIs.

 

Ipshita C.

National Instruments
Applications Engineer
Message 2 of 2
(2,416 Views)