National Instruments 636 Series User Manual

11-4 | ni.com
Chapter 11 Triggering
Routing Analog Comparison Event to an Output
Terminal
You can route Analog Comparison Event out to any PFI <0..15> or RTSI <0..7> terminal.
Analog Trigger Types
Configure the analog trigger circuitry to different triggering modes:
• Analog Edge Triggering—Configure the analog trigger circuitry to detect when the
analog signal is below or above a level you specify.
In below-level analog triggering mode, shown in Figure 11-4, the trigger is generated when
the signal value is less than Level.
Figure 11-4. Below-Level Analog Triggering Mode
In above-level analog triggering mode, shown in Figure 11-5, the trigger is generated when
the signal value is greater than Level.
Figure 11-5. 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

National Instruments 636 Series Specifications

General

Brand	National Instruments
Model	636 Series
Category	Data Loggers
Language	English