User manual

RIGOL 6 To Make Measurements
DS2000A User’s Guide
6-6
to set the scale and position of the horizontal axis respectively.
The unit of the vertical axis can be dB or Vrms which use logarithmic mode and
linear mode to display vertical amplitude respectively. If you need to display the
FFT frequency spectrum in a relatively larger dynamic range, dB is
recommended. Press Scale to select the desired unit and the default is Vrms.
Press and and use to set the vertical position and amplitude 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”.
T
o reduce the random noise and aliasing frequency components of repetitive or
single pulse, set the Acquisition Mode of the oscilloscope to “Average”.