User Manual

1. Press the Math button and call out the Wfm Math menu.
2. Press the H1 button and call out the Dual Wfm Math menu. The menu will display at the left of the screen.
3. Press the F1 menu selection button and choose CH1 for Factor1.
4. Press the F2 menu selection button and choose +.
5. Press the F3 menu selection button and choose CH2 for Factor2. The green calculated waveform M is
displayed on the screen.
Fig. 20 Waveform resulted from CH1 +CH2 Mathematical Manipulation
13. 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.
FFT in this oscilloscope can transform 2048 points of the time-domain signal into its frequency components
and the final frequency contains 1024 points ranging from 0Hz to Nyquist frequency.
Taking the FFT operation for example, the operation steps are as follows:
1. Press the Math button and call out the Math menu.
2. Press the H2 button and call out the FFT menu.
3. Press the F1 button to choose CH1 as the source.
4. Press F2 button, the windows item will display at the left of the screen, turn the M knob to select Window,
including Rectangle, Hamming, Hanning and Blackman.
5. Press F3 button to choose the Format, including dB, Vrms.
6. Press F4 button, the zoom window will display at the left of the screen, turn the M knob to zoom in or out
the wave of the multiple including ×1, ×2, ×5, ×10.
-114-