User Manual

115
FFT
Source
①
②
③
④
FFT source
Window
Rectangle
Hanning
Hamming
Blackman
Bartlett
Kaiser
Select window for FFT.
Format
Vrms
dB
Select Vrms for Format.
Select dB for Format.
Horizontal
Hz
Hz/div
Switch to select the horizontal position or time
base of the FFT waveform, turn the G knob to
adjust it
Vertical
div
v or dB
Switch to select the vertical position or voltage
division of the FFT waveform, turn the G knob
to adjust it
Taking the additive operation between Channel 1 and Channels 2 for
example, the operation steps are as follows:
1. Press the Math button to display the math menu in the bottom. The
blue M waveform appears on the screen.
2. Select Dual Wfm Math in the bottom menu.
3. Select Factor1 in the right menu; select ① in the left source menu.
4. Select Operator as + in the right menu.
5. Select Factor2 in the right menu; select ② in the left source menu.
6. Select Vertical in the right menu; select repeatedly to make the
symbol in front of div, turn the G knob to adjust the vertical position of
Math waveform; then select to make the symbol in front of the
voltage below, turn the G knob to adjust the voltage division of Math
waveform.
Using FFT function
The FFT (fast Fourier transform) math function mathematically converts a
time-domain waveform into its frequency components. It is very useful for