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RIGOL
Figure 2-19 Table 2-8 The FFT menu (Page 2/2)
Menu
Vertical
scale
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.
2-16
Settings
comments
The multifunctional knob
adjusts the vertical position of
Math
The multifunctional knob
adjusts the vertical amplitude
of Math
Vrms
Set Vrms as vertical scale unit
dBVrms
Set dBVrms as vertical scale
unit
User's Guide for DS1000B series
© 2008 RIGOL Technologies, Inc.
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