Noise measurment of an accelerometer with the PCI-4461 card

[dsb@NI]

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

[artlabview]

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?

[dsb@NI · Accepted solution]

Exactly, for all bins, take the square root.

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

[artlabview]

Okay, thank you for all your answers. I will look how to do that.

Arthur