Frame Trigger Violation
It relates to the fact that a trigger pulse cannot be immediately served under some circumstances. A trigger pulse is used as TE source when TrigMode or NextTrigMode are set to HARD, SOFT or COMBINED.
The mechanism equally applies to area-scan and to line-scan. In the latter case, "frame trigger" should be understood as "page trigger".
The mechanism applies only when the acquisition sequence is activated.
The cases when a trigger pulse cannot be served are as follows:
- If phase overlapping is not allowed, a violation is detected when the trigger pulse occurs during the acquisition phase
- If phase overlapping is allowed, a violation is detected when the trigger pulse occurs too early during the acquisition phase for the waiting phase to complete before the end of the acquisition phase
This is illustrated by the following drawing:
When a trigger pulse occurs at a forbidden time, the Frame Trigger Violation MultiCam signal is issued.
Refer to Signaling and Exceptions to learn how to handle a MultiCam signal.
An informative MultiCam parameter called FrameTriggerViolation is also provided. It is incremented when violations occur.