Introduction
The most common method of acquiring frequency information is to use
spectrum averaging, i.e. averaging is
performed in the frequency domain.
This method has a number of advantages, the principal one being that it
is a very easy method to use, and that
it will work with any type of signal.
But if you have some a priori
knowledge about the signal under investigation, and if the signal of interest is periodic, then you can use the
(synchronous) time domain averaging method, or signal enhancement
as it is called on Brüel & Kjær analyzers. As opposed to frequency spectrum averaging, signal enhancement
requires a trigger signal synchronous
with the periodic signal of interest.
No comments:
Post a Comment