HP 81101A Reference Manual page 110

Specifications
Pulse Parameter Definitions
Preshoot, Overshoot, Ringing
Preshoot and overshoot are peak distortions preceding/following an
edge. Ringing is the positive-peak and negative-peak distortion,
excluding overshoot, on pulse top or base. For example, a combined
preshoot, overshoot, and ringing specification of 5% implies:
• Overshoot/undershoot < 5%
• Largest pulse-top oscillation
0 % Amplitude
Settling Time
Time taken for pulse levels to settle within level specifications, measured
from 90% point on leading edge.
110
<+ 5%, of pulse amplitude.
Overshoot
eg 5%
100 %
Amplitude
90 %
Amplitude
Ringing (POSITIVE)
eg +3 %
Ringing (NEGATIVE)
eg –2 %
Preshoot
eg 2 %
Settling Time
Amplitude
Accuracy
Band