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Math FFT
TDS1000/2000-Series Digital Oscilloscope User Manual
125
When you change the zoom factor, the FFT spectrum is magnified
about the center graticule line. In ot her words, the axis of horizontal
magnification is the center graticule line.
Turn the HORIZONTAL POSITION knob clockwise to move the
FFT spectrum to the right. Push the SET TO ZERO button to
position the center of the spectrum at the center of the graticule.
Vertical Zoom and Position
The channel vertical knobs become zoom and position controls for
their respective channels when displaying the FFT spectrum. The
VOLTS/DIV knob provides zoom factors of X0.5, X1 (default), X2,
X5, and X10. The FFT spectrum is vertically magnified about the
M marker (math waveform reference point on the left edge of the
screen).
Turn the VERTICAL POSITION knob clockwise to move the
spectrum up.