GW Instek GDS-1000A Series User Manual - Manual (Page 61)

MEASUREMENT
61
Using the FFT function
Procedure 1. Press the Math key. MATH
2. Press Operation repeatedly
to select FFT or FFT RMS.
3. Press Source repeatedly to
select the source channel.
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 or RMS.
6. To move the FFT waveform
vertically, use the Variable
knob. The position will be
updated in Position.
VARIABLE
Range –12.00 Div ~ +12.00 Div
7. To select the vertical scale of
FFT waveform, press
Unit/Div(FFT) or
Volt/Div(FFT RMS)
repeatedly.
Range 1, 2, 5, 10, 20 dB/Div
Voltage Volt/Div