Chapter 3
Hardware Overview
©
National Instruments Corporation
3-9
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 3-7.
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 3-8.
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. Any of the three timing
sections of the DAQ-STC can use this digital trigger. For example, you can
configure the AI section to acquire
n
scans after the AI signal crosses a
specific threshold. You can configure the AO section to update its outputs
whenever the AI signal crosses a specific threshold.
highValue
Trigger
lowValue
highValue
Trigger
lowValue