Glossary “trigger source” Definition:
Signal that supplies the scope with its trigger or starting point. This can be either internal or from an external source

Glossary “trigger wheel” Definition:
Term for an armature used in a magnetic pick-up (VRS), Hall effect or optical sensing device.

Glossary “trigger slope” Definition:
Slope that a trigger source signal must reach before the trigger circuit initates a sweep.

Glossary “trigger holdoff” Definition:
A control that allowes for adjustment of the period of time after a valid trigger during which the oscilloscope cannot trigger.

Glossary “trigger level” Definition:
Voltage level that a trigger source signal must reach befor the trigger circuit intiates a sweep

Glossary “trigger mode” Definition:
Mode that determines whether or not the oscilloscope draws a waveform if it does not detect a trigger