Loading ...
Loading ...
Loading ...
172
Open FFT
1) Tap on the lower right corner of the screen to enter the second channel selection area. Tap the soft key
to cycle through the math channel, open the math channel menu, and close the math channel.
2) Tap spectrum type “Line/Decibel” to open the FFT window (see Figure 9-3 FFT Window).
3) Tap the Operation Source box to select the channel for which FFT transform is required.
4) Tap the window box to select the window function applied to the FFT input signal.
Selection of window function
In the FFT transform, four different FFT windows can be selected.
Each window is alternatively used between frequency resolution and amplitude accuracy, and the appropriate
window may be selected according to the characteristics of the following windows.
Loading ...
Loading ...
Loading ...