PCI-4461 RMS example from an acquired signal

[Daniel Coelho]

hi,

I'm trying to calculate the Vrms of an acquired sinal from an AI channel.

Can anyone show me a simple LabWindowsCVI example to do this?

I'd apreciate it.

Thanks in advance.

Daniel Coelho

[karpa]

Root Mean Square/Quadratic Mean

That means square every sample you take (X^2)
and added to the previous sum value. (sum=sum+X^2)
do this for N samples..
and then calculate

Vrms = Sqrt((X1)2+(X2)2+(X3)2+........+(XN)2/N) = sqrt(sum/N)

Paulos