Figure 3-4. Above-High-Level Triggering Mode; Figure 3-5. Inside-Region Triggering Mode; Figure 3-6. High-Hysteresis Triggering Mode - National Instruments DAQ PCI-4451 User Manual

Chapter 3 Hardware Overview
PCI-4451/4452 User Manual
In above-high-level triggering mode, the trigger is generated when the
signal value is greater than highValue. LowValue is unused.
highValue
Trigger

Figure 3-4. Above-High-Level Triggering Mode

In inside-region triggering mode, the trigger is generated when the signal
value is between the lowValue and the highValue.
highValue
lowValue
Trigger

Figure 3-5. Inside-Region Triggering Mode

In high-hysteresis triggering mode, the trigger is generated when the signal
value is greater than highValue, with the hysteresis specified by lowValue.
highValue
lowValue
Trigger

Figure 3-6. High-Hysteresis Triggering Mode

3-8 © National Instruments Corporation