Need Help. NI Labview, SignalExpress, power spectrum (spectra)
Need Help. NI Labview, SignalExpress, power spectrum (spectra)
(OP)
the top plot is in time domain the signal from an accelerometer. the bottom plot is in frequency domain.
i do not understand the unit of the power, (dB ref 1.0E+0 V/sqrt (Hz).
can anyone shine me some light?
thansk.
i do not understand the unit of the power, (dB ref 1.0E+0 V/sqrt (Hz).
can anyone shine me some light?
thansk.





RE: Need Help. NI Labview, SignalExpress, power spectrum (spectra)
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RE: Need Help. NI Labview, SignalExpress, power spectrum (spectra)
thanks.
RE: Need Help. NI Labview, SignalExpress, power spectrum (spectra)
TTFN

FAQ731-376: Eng-Tips.com Forum Policies
Need help writing a question or understanding a reply? forum1529: Translation Assistance for Engineers
Of course I can. I can do anything. I can do absolutely anything. I'm an expert!
There is a homework forum hosted by engineering.com: http://www.engineering.com/AskForum/aff/32.aspx
RE: Need Help. NI Labview, SignalExpress, power spectrum (spectra)
A simple analogy with the pressure level allows to understand.
Lp=10*Log10(p^2/pref^2) with pref= 2.10^(-5)Pa (and not pref = 2.10^(-5)Pa^2 ...)
Here the operation is 10*Log10((V^2/Hz)/Ref^2) where Ref is in V/sqrt(Hz) and equals 1