What Is Hysteresis?

What Is Hysteresis?

Hysteresis eliminates incorrect triggers caused by noisy signals. For example, if your signal contains two rising edges of different amplitudes, you can use hysteresis to trigger on one of the edges. Although VirtualBench uses a default amount of hysteresis for edge triggering, which is typically 1.4% of the vertical range, you can increase that value for noisy signals.

In the Trigger configuration section, click to view or change the trigger level and hysteresis value.

Hysteresis triggering is possible on both analog channels.

A rising edge trigger is generated when the signal crosses below the voltage specified by the trigger level setting minus the hysteresis value, and then crosses the trigger level.

A falling edge trigger is generated when a signal crosses above the voltage specified by the trigger level setting plus the hysteresis value, and then crosses the trigger level.