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U
FFT
(F
SING
AST
FFT breaks down signals into component frequencies, which the oscilloscope uses
to display a graph of the frequency domain of a signal (as opposed to the
oscilloscope's standard time domain graph). These frequencies can then be
matched with known system frequencies, such as system clocks, oscillators, or
power supplies.
The FFT in this oscilloscope can transform 2048 points of a time-domain signal into
its frequency components with the final frequency containing 1024 points ranging
from 0Hz to the Nyquist frequency.
The following table describes the FFT menu:
Function Menu
FFT
Source
Window
Format
F
T
OURIER
RANSFORM
Setting
Instruction
ON
Turn on FFT function
OFF
Turn off FFT function
CH1
Select CH1 as FFT source
CH2
Select CH2 as FFT source
Rectangle
Blackman
Select window for FFT (details below)
Hanning
Hamming
dB
Set Vrms as the vertical scale unit of measure
Vrms
Set dBVrms as the vertical scale unit of measure
)
(MS420
)
ONLY
65
V5.1 ‐ March 2010
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