GW Instek GDS-1000 Series User Manual - Manual (Page 51)

MEASUREMENT
51
Using the FFT function
Procedure 1. Press the Math key. MATH
2. Press Operation repeatedly
to select FFT.
Operation
FFT
3. Press Source repeatedly to
select the source channel.
Source
CH1
4. Press Window repeatedly to
select the FFT window type.
5. The FFT result appears. The horizontal scale
changes from time to frequency, and the
vertical scale from voltage to dB.
6. To move the FFT waveform
vertically, press Position and
use the Variable knob.
Position
0.00 Div
VARIABLE
Range –12.00 Div ~ +12.00 Div
7. To select the vertical scale of
FFT waveform, press
Unit/Div repeatedly.
Range 1, 2, 5, 10, 20 dB/Div
8. To clear the FFT result from
the display, press the Math
key again.
MATH