Scope Features and Functions
2
U2701A/U2702A USB Modular Oscilloscopes User’s Guide
61
Fast Fourier Transform Function
FFT is used to compute the fast Fourier transform using analog
input channels or math functions. FFT takes the digitized time
record of the specified source and transforms it to the
frequency domain. When the FFT function is selected, the FFT
spectrum is plotted on the graph display as magnitude in dBV
versus frequency. The readout for the horizontal axis changes
from time to frequency (Hertz) and the vertical readout changes
from volts to dB.
Figure 2-11
FFT controls
N O T E
When the FFT source is channel 1 or channel 2, FFT units will be displayed
in dBV .
U2700A_Modular_Scope.book Page 61 Tuesday, May 6, 2008 9:32 AM
