Rigol DS1000C User Manual page 39

5. To invert a waveform
Invert turns the displayed waveform 180 degrees, as respect to the ground level.
When the oscilloscope is triggered on the inverted signal, the trigger is also inverted.
Figure 2-10 and 2-11 show the changes after inversion.
© Copyright RIGOL Technologies, Inc. 2007.
The waveform before inversion
Figure 2-10
The waveform after inversion
Figure 2-11
User's Guide for DS1000 Series
RIGOL
Invert OFF
Invert ON
2-9