Math FFT
Displaying th
e FFT Spectrum
Push the Math button to display the Math Menu. Use the options to select the
Source channel, Window algorithm, and FFT Zoom factor. You can display only
one FFT spect
rum at a time.
Math FFT option Settings Comments
Source CH1, CH2, CH3
1
, CH4
1
Selects the channel used as the FFT source
Window Hanning, Flattop, Rectangular
Selects the FFT window type; (See page 58, Selecting
an FFT Wind
ow.)
FFT Z oom X1, X2, X5, X10
Changes t
he horizontal magnification of the FFT display;
(See page 61, Magnifying and Positioning an FFT
Spectrum.)
1
Available only on a 4-channel oscilloscope.
Fundamental
freque
ncy
component
Frequency
component
1. Frequency at the center graticule line.
2. Vertical scale in dB per division (0 dB = 1 V
RMS
).
3. Hor
izontal scale in frequency per division.
4. Sample rate in number of samples per second.
5. FFT window type.
TDS2000C and TDS1000C-EDU Series Oscilloscope User Manual 57
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