Dynamic Signal Acquisition

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Noise measurment of an accelerometer with the PCI-4461 card

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They are the same if the product of df of the spectrum and ENBW of the time-domain window equals 1.

Doug
NI Sound and Vibration
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Message 11 of 14
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Ok, thank you for all your answers. 

One last question: my actual signal is in g rms²/Hz

If I want it in g/rtHz, I have to do:

( g rms²/Hz ) ^(1/2) ?

Or is it more complicated?

 

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Solution
Accepted by topic author artlabview

Exactly, for all bins, take the square root.

 

For spectra in dB units, convert to linear scale before square root.

Doug
NI Sound and Vibration
Message 13 of 14
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Okay, thank you for all your answers. I will look how to do that.

 

Arthur

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