Rigol MSO1000Z Series User Manual page 124

RIGOL
Tips
You can adjust the center frequency and horizontal scale at the same time

using HORIZONTAL
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".
6-10
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