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Xtium2-CL MX4 Reference
Xtium2-CL MX4 User's Manual
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 23: 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 24: 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 25: Line scan, Variable Frame, Level Trigger ( Roll-Over)
