National Instruments Network Device DAQ S - Manual (Page 136)

Chapter 11 Triggering
NI 6124/6154 User Manual 11-4 ni.com
In below-level analog triggering mode, shown in Figure 11-3, the
trigger is generated when the signal value is less than Level.
Figure 11-3. Below-Level Analog Triggering Mode
In above-level analog triggering mode, shown in Figure 11-4, the
trigger is generated when the signal value is greater than Level.
Figure 11-4. Above-Level Analog Triggering Mode
• Analog Edge Triggering with Hysteresis—Hysteresis adds a
programmable voltage region above or below the trigger level that an
input signal must pass through before the DAQ device recognizes a
trigger condition, and is often used to reduce false triggering due to
noise or jitter in the signal.
– Analog Edge Trigger with Hysteresis (Rising Slope)—When
using hysteresis with a rising slope, you specify a trigger level and
amount of hysteresis. The high threshold is the trigger level; the
low threshold is the trigger level minus the hysteresis.
Level
Analog Comparison Event
Level
Analog Comparison Event