A Start Trigger begins an acquisition or generation. You can configure this trigger to occur on a digital edge, a digital pattern, an analog edge, when an analog signal enters or leaves a window, or at a specified time (for devices that support time triggering).

Note Retriggering applies to the Start Trigger, which can be configured to respond to multiple trigger events. The Arm Start Trigger, by contrast, does not support retriggering. The Arm Start Trigger is used to arm the task and waits for a single trigger event before allowing the Start Trigger to activate.