OWON TDS Series - Manual (Page 32)

5.Advanced User Guidebook
27
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 analyzing
the input signal on Oscilloscope. You can match these frequencies with known system
frequencies, such as system clocks, oscillators, or power supplies.
Taking the FFT operation 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.