Defining An Fft Trace; Figure 3 27: The Deftra Pop Up Menu - Tektronix 11801C User Manual

Fast Fourier Transforms
Defining an FFT
Trace
FFTmag and FFTphase
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You can define an FFT display of a trace using the DefTra pop up menu or
you can use the FFTmag and FFTpha icons.
Defining an FFT Display Using the DefTra Pop up Menu
You can define a trace that displays the FFT magnitude or FFT phase using
the DefTra pop up men, which is displayed when you select the DefTra
icon. The FFTmag( and FFTphase( selectors can be used to define a
display of the magnitude or the phase of the frequency spectrum of a trace.
See Figure 3 27.
The part of the trace description that is within the FFTmag( or FFTphase(
function may be any arbitrary trace.
Selectors

Figure 3 27: The DefTra Pop Up Menu

Reference