GigE VA Series User Manual page 29

8.3.1.2 Trigger Mode = On
When the Trigger Mode parameter is set to On, you must apply an exposure start trigger signal to the camera
each time you want to begin a frame acquisition. The Trigger Source parameter specifies the source signal that
will act as the exposure start trigger signal.
The available settings for the Trigger Source parameter are:

Software: You can apply an exposure start trigger signal to the camera by executing a Trigger Software
command for the exposure start trigger on your computer.

External: You can apply an exposure start trigger signal to the camera by injecting an externally generated
electrical signal (commonly referred to as a hardware trigger signal) into the Control Receptacle pin 1 on the
camera.
If the Trigger Source parameter is set to External, you must also set the Trigger Activation parameter.
The available settings for the Trigger Activation parameter are:

Rising Edge: Specifies that a rising edge of the electrical signal will act as the exposure start trigger.

Falling Edge: Specifies that a falling edge of the electrical signal will act as the exposure start trigger.
Exposure Time Control with Trigger Mode = On
When the Trigger Mode parameter is set to On and the Trigger Source parameter is set to Software, the
exposure time for each frame acquisition is determined by the value of the camera's Exposure Time parameter.
When the Trigger Mode parameter is set to On and the Trigger Source parameter is set to External, the
exposure time for each frame acquisition can be controlled with the Exposure Time parameter or it can be
controlled by manipulating the external trigger signal.
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