User Manual

WaveAce
50
WA-GSM-E-RevA
FFT
The FFT process mathematically converts a time-domain signal into its
frequency components. You can display only one FFT waveform at a time.
You can choose to display the FFT waveform and the channel waveform on
the screen (split screen) or to display the FFT waveform full screen. You
can choose from four Window types:
Window
Type
Description
Test Content
Rectangular
Best frequency resolution,
worst magnitude resolution.
This is essentially the same
as no window.
Symmetric transients or bursts.
Equal-amplitude sine waves with
fixed frequencies. Broadband
random noise with a relatively
slowly varying spectrum.
Hanning
Better frequency, poorer
magnitude accuracy than
Rectangular.
Sine, periodic, and narrow-band
random noise. Asymmetric
transients or bursts.
Hamming
Better frequency, poorer
magnitude accuracy than
Rectangular. Hamming has
slightly better frequency
resolution than Hanning.
Sine, periodic, and narrow-band
random noise. Asymmetric
transients or bursts.
Blackman
Best magnitude, worst
frequency resolution.
Single frequency waveforms to
find higher order harmonics.