14. Use Mathematical Manipulation Function
The Mathematical Manipulation function is used to show the results of the FFT operation.
15. 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 the Oscilloscope. You can
match these frequencies with known system frequencies, such as system clocks, oscillators, or power
supplies.
FFT function in this oscilloscope transforms 2048 data points of the time-domain signal into its
frequency components mathematically and the final frequency contains 1024 points ranging from 0 Hz
to Nyquist frequency.
Taking the FFT operation for example, the operation steps are as follows:
1. Click
to show Function menu, choose "
Math
". Check "FFT". The user interface is
switched into Three View mode.
2. Set "Channel", "Window", "Format", "Scale", "Frequency Base".
3. You can drag anywhere in FFT window to move the signal up and down and side to side.
15.1. To select the FFT window
There are four FFT windows. Each one has trade-offs between frequency resolution and magnitude
accuracy.
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