48 • Xtium2-CLHS PX8 Reference Xtium2-CLHS PX8 User's Manual
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 16: 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 17: Line scan, Fixed Frame, Level Trigger ( Roll-Over)
CVI File (VIC) Parameters Used
The VIC parameters listed below provide the control functionality for virtual frame reset. Sapera
applications load pre-configured CVI files or change VIC parameters during runtime.
Note: Sapera camera file parameters are easily modified by using the CamExpert program.
External Frame Trigger Enable = X, where: (with Virtual Frame Trigger enabled)
• If X = 1, External Frame Trigger is enabled
• If X = 0, External Frame Trigger is disabled
External Frame Trigger Detection = Y, where: (with Virtual Frame Trigger edge select)
• If Y= 1, External Frame Trigger is active low
• If Y= 2, External Frame Trigger is active high
• If Y= 4, External Frame Trigger is active on rising edge
• If Y= 8, External Frame Trigger is active on falling edge
• If Y= 32, External Frame Trigger is dual-input rising edge
• If Y= 64, External Frame Trigger is dual-input falling edge
Note:. For dual-input triggers, Trigger Input #1 signals the start of the frame trigger, Trigger Input
#2 signals the end of the frame trigger.
External Frame Trigger Level = Z, where: (with Virtual Frame Trigger signal type)
• If Z = 1, External Frame Trigger is a TTL signal
• If Z = 2, External Frame Trigger is differential signal (RS-422)
• If Z = 8, External Frame Trigger is a 24V signal
• If Z = 64, External Frame Trigger is a 12V signal
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