National Instruments AT E Series - Manual (Page 43)

Chapter 3 Hardware Overview
© National Instruments Corporation 3-17 AT E Series User Manual
In high-hysteresis analog triggering mode, the trigger is generated when the
signal value is greater than highValue, with the hysteresis specified by
lowValue.
Figure 3-12. High-Hysteresis Analog Triggering Mode
In low-hysteresis analog triggering mode, the trigger is generated when the
signal value is less than lowValue, with the hysteresis specified by
highValue.
Figure 3-13. Low-Hysteresis Analog Triggering Mode
The analog trigger circuit generates an internal digital trigger based on the
AI signal and the user-defined trigger levels. This digital trigger can be used
by any of the timing sections of the DAQ-STC, including the AI, AO, and
general-purpose counter/timer sections. For example, the AI section can be
configured to acquire n scans after the AI signal crosses a specific
threshold. As another example, the AO section can be configured to update
its outputs whenever the AI signal crosses a specific threshold.
highValue
Trigger
lowValue
highValue
Trigger
lowValue