8.Features
© 2023 China Daheng Group, Inc. Beijing Image Vision Technology Branch 105
Acquisition
Mode
Camera
output
Continuous mode
Continuous Frame
Trigger mode
Trigger Frame
Continuous mode
Trigger
Continuous Frame
1
2
3
4
…
frame1
frame2
frame3
frame4
frame5
frame6
frame7
…
…
Figure 8-20 Switch trigger mode during frame reading out
As shown in Figure 8-20, the camera starts with trigger mode OFF after receiving acquisition start
command.
At point 1, the camera gets a command of setting trigger mode ON while transferring the 3
rd
frame in trigger
mode OFF. The trigger mode is not active until the 3
rd
frame is finished, at point 2, and then the trigger
signal will be accepted. At point 3, the camera gets a command of switching back to OFF. It is also not
active until the 5
th
frame is finished, it should wait a complete reading out. The camera switches from
trigger mode to continuous mode at point 4, and then the camera works in continuous mode.
Switch trigger mode during blanking
Acquisition
Mode
Camera
output
Continuous mode
Continuous Frame
Trigger mode
Trigger Frame
Trigger
1
2
3
4
frame1
frame2
frame3
frame4
frame6
…
…
…
…
frame5
Continuous mode
Continuous Frame
Figure 8-21 Switch trigger mode during blanking
As shown in Figure 8-21, the camera with trigger mode OFF begins after receiving an AcquisitionStart
command.
At point 1, the camera gets a command of setting trigger mode ON while it is in wait state. The trigger
mode is not active until the 3
rd
frame is finished, i.e., point 2. Please note that the 3
rd
frame does not belong
to trigger mode. All trigger frames need trigger signals or software trigger commands. At point 3, the
camera gets a command of switching back to continuous mode. It is also not active until the 5
th
frame is
finished, it should wait a complete frame. The camera switches from trigger mode to continuous mode at
point 4, and then the camera works in continuous mode.