User Guide

RIGOL
DS6000 User’s Guide
6-7
Full Screen: the source channel and the FFT operation results are displayed in
the same window to view the frequency spectrum more clearly and to perform
more precise measurement.
Note that in FFT mode and when MATH is the active channel, you can also press
HORIZONTAL SCALE to switch to “Split” or “Full Screen”.
4. Set the Vertical Scale
In FFT measurement, the unit of the horizontal axis changes from time to
frequency. Use HORIZONTAL SCALE to set the scale and position of the
horizontal axis respectively.
The unit of the vertical axis can be dBVrms or Vrms which are applied to display
vertical amplitude of the logarithmic mode and linear mode respectively. If you
need to display the FFT frequency spectrum in a relatively larger dynamic range,
dBVrms is recommended. Press Scale to select the desired unit and the default
is Vrms. Use VERTICAL SCALE and HORIZONTAL SCALE to set the
vertical amplitude and position of the FFT frequency spectrum respectively.
Tips
 Signals with DC components or deviation would cause error or deviation of
the FFT waveform components. To reduce the DC components, set the
“Channel Coupling” to “AC”.
 To reduce the random noise and aliasing frequency components of
repetitive or single pulse, set the “Acquisition Mode” of the oscilloscope
to “Average”.
Vertical Amplitude Horizontal Scale