Sub-link Acquisition
Applies to: 
The Sub-link Acquisition feature of
Camera requirements
This feature applies only to 8-connection area-scan cameras having the following characteristics:
| ● | The image header and the image data of the first line are packed together into a single CoaXPress data packet and delivered to CoaXPress Connection 0. |
| ● | For the remaining lines of the frame (or ROI), the image data of a single image line are packed into a single packet and delivered to the next CoaXPress Connection. Connections are rotated using the CoaXPress standard packet distribution ordering rule: (0 to 7, then back 0). |
| ● | The image frame (or ROI) height must be a multiple of 8 lines to ensure that the last image line is delivered on the last connection (Connection 7). |
Principles
The 8-connection CoaXPress link is divided into 2 sub-links. Each sub-link connects to a
8-connection camera using 2 sub-links and 2
The first 4-connection sub-link connects to the "sub-link-master grabber": a 1-slm-camera firmware variant.
The next 4-connection sub-link connects to the "sub-link-slave grabber": a 1-sls-camera firmware variant.
Each grabber delivers one-half of the image frame into a GenTL buffer. The application has to reconstruct the whole image
frame by merging the contents of the two corresponding buffers. This is shown in the 320-sublink EGrabber sample
program.
The master grabber controls the camera and manages the system triggers.
Both grabbers are configured to capture all the image data of their respective sub-link.