Chapter 11
Triggering
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
An
a
log Comp
a
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