Table of Contents
Advertisement
8.3
Exposure Start Trigger
The exposure start trigger is used to begin frame acquisition. Exposure start trigger signals can be generated
within the camera or may be applied externally as Software or External exposure start trigger signals. If an
exposure start trigger signal is applied to the camera, the camera will begin to expose a frame.
8.3.1
Trigger Mode
The main parameter associated with the exposure start trigger is the Trigger Mode parameter. The Trigger
Mode parameter for the exposure start trigger has two available settings: Off and On.
8.3.1.1
Trigger Mode = Off
When the Trigger Mode parameter is set to Off, the camera will generate all required exposure start trigger
signals internally, and you do not need to apply exposure start trigger signals to the camera.
With the Trigger Mode set to Off, the way that the camera will operate the exposure start trigger depends on the
setting of the camera's Acquisition Mode parameter:
Single Frame: The camera will automatically generate a single exposure start trigger signal whenever it
receives an Acquisition Start command.
Multi-Frame: The camera will automatically begin generating exposure start trigger signals as many as
specified by the Acquisition Frame Count parameter when it receives an Acquisition Start command.
The camera will continue to generate exposure start trigger signals until the number of exposure start trigger
signals it has received is equal to the current Acquisition Frame Count parameter setting or until it
receives an Acquisition Stop command.
With Single Frame or Multi-Frame Acquisition Mode, if you execute another Acquisition
Start command while the camera is in the process of acquiring a frame, an error may occur.
When the Acquisition Mode parameter is set to Multi-Frame, you must set the value of the
camera's Acquisition Frame Count parameter. The value of the Acquisition Frame Count
can range from 1 to 255.
27 of 94
VA GigE series
RA14-131-003
Advertisement
Table of Contents
