RIGOL
© 2008 RIGOL Technologies, Inc.
User’s Guide for DS1000B series
Figure 2-19 Table 2-8 The FFT menu (Page 2/2)
Key points for FFT
1. Signals that have a DC component or offset can cause incorrect FFT waveform
component magnitude values. To minimize the DC component, choose AC
Coupling on the source signal.
2. To reduce random noise and aliases components in repetitive or single-shot
events, set the oscilloscope acquisition mode to Average.
3. To display FFT waveforms with a large dynamic range, use the dBVrms scale.
The dBVrms scale displays component magnitudes using a log scale.
The multifunctional knob˄ ˅
adjusts the vertical position of
Math
The multifunctional knob˄ ˅
adjusts the vertical amplitude
of Math
Set Vrms as vertical scale unit
Set dBVrms as vertical scale
unit
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