Rigol MSO1000Z series User Manual page 194

RIGOL
Chapter 13 Signal Source
t Symmetry=t/T*100%
T
Figure 13-1 Symmetry Definition
Press Symmetry to set the symmetry of the ramp waveform. For the setting method,
please refer to the introduction in "Parameter Setting Method". The range is from
0% to 100%.
13-4 MSO1000Z/DS1000Z User's Guide