Agilent Technologies 16533A 1-GSa/s Programmer's Manual page 80

MEASure Subsystem
Preshoot and Overshoot
Preshoot and overshoot measure the perturbation on a waveform above or
below the top and base voltages.
Preshoot
Is a perturbation before a rising or a falling edge and measured as a
percentage of the top-base voltage.
Overshoot
Is a perturbation after a rising or falling edge and is measured as a percentage
of the top-base voltage.
For complete details of the measurement algorithms, refer to the User's
Reference Manual.
Refer to Figure 7-1 for the MEASure Subsystem Syntax Diagram
Before using any of the Measure Subsystem queries, note that the SOURce
command is part of every query of this subsystem. The SOURce command
specifies the channel that is to be used for making the measurements.
If a parameter cannot be measured, the instrument responds with 9.9E37.
7–3