neoflash
Community Fellow
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Mixed-Signal Designer
Posts: 397
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Specrum analyzer measurement principles' question
Oct 30th, 2005, 1:49am
Hi, Folks:
I am curious about how machine spectrum analyzer calculate the PSD of input signal.
In Parcevall law:
Integrate (f(t)^2) = Integrate (F(s)^2) ;
In left side of equation, original law said that the integration start from -T to +T. (T is measurement interval)
However, in real world, f(t) is always zero when time is negative.
So, the final PSD is get from divide both sides by T, or 2T? I think it should be T, is that right?
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