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CamExpert Quick Start
Xtium2-CLHS PX8 User's Manual
External Trigger Category
The External category groups parameters for configuring an external trigger for controlling image
acquisition.
Parameter Descriptions
The following table describes the CamExpert External Trigger category of Sapera LT parameters.
Display
Name
Parameter
Description
External Trigger
Enables/disables external trigger on the acquisition board.
When enabled, the acquisition board acquires an image
frame from the camera after receiving the trigger. Boolean
parameter (TRUE or FALSE).
Note: Applies to area scan cameras only.
External Trigger
Detection
CORACQ_PRM_EXT_TRIGGER_DETECTION
(areascan)
CORACQ_PRM_EXT_FRAME_TRIGGER_DETECTION
(linescan)
Defines the signal detected that generates an external
trigger event to the acquisition device.
Two types of trigger are available:
Level Trigger: Active Low / High
Logic level (Low/High) on the trigger input enables
continuous image capture until the trigger input is set to
opposite logic .
Edge Trigger: Rising / Falling edge
Edge transition of a trigger pulse captures one image
frame.
Linescan cameras also support:
Dual-Input Trigger Rising Edge / Dual-Input Trigger Falling
Edge
External Trigger
Level
Specifies the electrical level of the external trigger
connected to the acquisition board.
Possible values:
TTL
single-ended logic signal
RS-422
balanced logic signal
12V
single-ended logic signal
24V
single-ended logic signal
External Trigger
Source
Specifies the physical input source the external frame
trigger is connected to or which trigger input is used on
the acquisition device.
Note: to assign the external trigger source to a GPIO it
must be reserved; By default, boards are shipped with
User Interface General Inputs 1 & 2 reserved for External
Triggers and User Interface General Outputs 1 & 2
reserved for Strobe Outputs.
Refer to
User Interface GIOs Reservation
information on using the Teledyne DALSA Device Manager
tool to reserve GPIOs.
