what is the power spectrum unit for Unevenly Sampled Signal Spectrum.vi if the input signal unit is Volts?

[Act 3]

The Unevenly Sampled Signal Spectrum.vi has two outputs, Power Spectrum FFT(X) and Power Spectrum FFT(X) Frequency. Can anyone tell me what's the unit for Power Spectrum FFT(X) if the input signal unit is volts. Also, is this VI equivalent to producing a PSD output?

[JuanCarlos]

Hi,

The power spectrum will be in units of Vrms^2 which are power units. There is a very usefull VI that you can use to easily transform the units of your spectrum; the VI is called Spectrum Unit Conversion.vi. You select the type of spectrum that you have and the units that you want it to be converted to.

Here is a good document on spectral measurements in genereal:

frequency spectrum

I hope this helps.

Regards,
Juan Carlos
N.I.

[Act 3]

Thanks Juan.