Dalsa Xtium-CL MX4 - Figure 20: Line Scan, Fixed Frame, Level Trigger (Roll-Over to Next Frame); Figure 21: Line Scan, Variable Frame, Edge Trigger (Active High Determines Frame Length); Figure 22: Line Scan, Fixed Frame, Level Trigger ( Roll-Over); Synchronization Signals for Variable Frame Length Acquisition

Xtium-CL MX4 User's Manual Xtium-CL MX4 Reference • 59
Frame Valid
Trigger
(Active High)
Grab Start
T T T T
Frame Valid
Trigger
(Active High)
Grab Start
T
Grab Start (SapTransfer) called before trigger
Grab Start (SapTransfer) called after trigger
T
Trigger event issued at grab start
T
Figure 20: Line scan, Fixed Frame, Level Trigger (Roll-Over to Next Frame)
Synchronization Signals for Variable Frame Length Acquisition
For variable length frames, trigger ignored events are not issued
(SapAcquisition::EventExternalTriggerIgnored); a valid trigger event always initiates either a frame
start or frame end.
Frame Valid
Trigger
(Rising Edge)
Grab Start
T
T
T
Buffer 1
Undefined
(Should Not Grab)
Buffer 2
Trigger > Frame
Buffer 3
Frame Max Height
1 frame per trigger edge; selected level determines frame length (up to max)
Figure 21: Line scan, Variable Frame, Edge Trigger (Active High determines Frame Length)
Frame Valid
Level Trigger
(Active High)
Grab Start
T T
T
Buffer 1
Buffer 4
Buffer 2
Trigger Level > Max Frame Height
Buffer 3
Frame Max Height
Figure 22: Line scan, Fixed Frame, Level Trigger ( Roll-Over)