Basler ace acA1920-155, User Manual, Page: 119 / 326

AW00123404000 Image Acquisition Control
Basler ace USB 3.0 109
6.3.5 Using a Hardware Frame Burst Start Trigger
6.3.5.1 Introduction
If the Trigger Mode parameter for the frame burst start trigger is set to on and the Trigger Source
parameter is, for example, set to Line 1, an externally generated electrical signal injected into
physical input line Line 1 on the camera will act as the frame burst start trigger signal for the camera.
This type of trigger signal is generally referred to as a hardware trigger signal or as an external
frame burst start trigger signal (ExFBTrig).
A rising edge or a falling edge of the ExFBTrig signal can be used to trigger frame burst start. The
Trigger Activation parameter is used to select rising edge or falling edge triggering.
When the Trigger Mode parameter is set to on, the camera will initially be in a "waiting for frame
burst start trigger" acquisition status. It cannot react to frame start trigger signals when in this
acquisition status. When the appropriate ExFBTrig signal is applied to Line 1 (e.g, a rising edge of
the signal for rising edge triggering), the camera will exit the "waiting for frame burst start trigger"
acquisition status and will enter the "waiting for frame start trigger" acquisition status. It can then
react to frame start trigger signals. When the number of frame start trigger signals received by the
camera is equal to the current Acquisition Burst Frame Count parameter setting, the camera will
return to the "waiting for frame burst start trigger" acquisition status. When a new ExFBTrig signal
is applied to Line 1, the camera will again exit from the "waiting for frame burst start trigger"
acquisition status and enter the "waiting for frame start trigger" acquisition status.
For more information about setting the camera for hardware frame burst start triggering and
selecting the input line to receive the ExFBTrig signal, see Section 6.3.5.2.
For more information about the electrical characteristics of Line 1, see Section 5.7.1 on page 57 ,
and of GPIO Line 3 and Line 4, set for input, see Section 5.9.2.1 on page 65 .