GDS-3000 Series User Manual 
84 
FFT 
 
2.  Press FFT from the bottom menu. 
3.  Select the Source from the side 
menu. 
4.  Press the Vertical Units key from 
the side menu to select the vertical 
units used.  
5.  Press the Window key from the side 
menu and select the window type. 
Hanning, Hamming, Rectangular, 
and Blackman. 
6.  The FFT result appears. For FFT, the horizontal 
scale changes from time to frequency, and the 
vertical scale from voltage/current to dB/RMS.