:TRIGger:HYSTeresis

Command Syntax

:TRIGger:HYSTeresis  {NORMal | HSENsitivity}

Query Syntax

:TRIGger:HYSTeresis?

Description

Selects the trigger hysteresis. Trigger hysteresis helps to prevent false triggers from occurring on a falling edge due to noise when the rising edge is selected as the trigger edge (or on a rising edge when the falling edge is selected as the trigger edge). The voltage through which the trigger signal must pass before another valid trigger is accepted is known as the arming voltage level. Hysteresis is the voltage difference between the arming level voltage and the trigger threshold level voltage.

NORMal

Select to trigger if a trigger signal crosses both the arming voltage level and the trigger threshold voltage level. Normal provides good trigger performance while minimizing false triggers.

HSENsitivity

Select high sensitivity when the hysteresis is small to allow best sensitivity to high frequency signals. This allows smaller signals to be used as triggers, but can result in false triggers if there is significant noise on the trigger signal, or if the trigger signal is not monotonic in the region of the trigger threshold level.