VOLTCRAFT DSO-2154 - The Waveform Calculation; Using FFT Function

4.Advanced User Guidebook
20
addition, multiplication, division and subtraction operations between two
channels, or the FFT operation for a channel. Press the Math button to display
the menu on the right.
The Waveform Calculation
Press the Math button to display the menu on the right, select Type as Math.
Function Menu
Setting
Description
Type
Math
Display the Math menu
Factor1
CH1
CH2
CH3
CH4
Select the signal source of the factor1
Sign
+ - * /
Select the sign of mathematical
manipulation
Factor2
CH1
CH2
CH3
CH4
Select the signal source of the factor2
Next Page
Enter next page
Vertical
(div)
Turn the M knob to adjust the vertical
position of the Math waveform.
Vertical
(V/div)
Turn the M knob to adjust the voltage
division of the Math waveform.
Prev Page
Enter previous page
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 right. The pink M
waveform appears on the screen.
2. In the right menu, select Type as Math.
3. In the right menu, select Factor1 as CH1.
4. In the right menu, select Sign as +.
5. In the right menu, select Factor2 as CH2.
6. Press Next Page in the right menu. Select Vertical (div), the
symbol is
in front of div, turn the M knob to adjust the vertical position of Math
waveform.
7. Select Vertical (V/div) in the right menu, the
symbol is in front of the
voltage, turn the M 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