Tektronix DPO3034 - Page 186

Analyze Waveform Data
3. Set the levels from the side-bezel menu.
Reference
Levels
Set Levels
in
%|
Units
Use H igh and Low reference to calculate rise
and fall times.
High Ref
(a) 90.0 %
Use Mid reference primarily for measurements
between edges, such a s pulse widths.
Mid Ref
50.0 %
50.0 %
Low Ref
10.0 %
-Setto
Defaults
170 DPO3000 Series Oscilloscopes User Ma nual