Linea SWIR GigE Series Camera
Operational Reference
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Overview of Transfer Control (TransferControlMode)
The acquisition transfer function operates in basic coupled mode or independent decoupled user-
controlled mode.
TransferControlMode = Basic
Basic Transfer Mode provides maximum compatibility with any control application running on the
host computer. The host based acquisition program commands the camera to do a frame grab and
send it through the camera’s frame buffer to the camera’s transfer module and the host. The
acquisition rate is limited by the host transfer rate.
TransferControlMode = UserControlled
User Controlled Transfer Mode decouples the camera acquisition module from the camera and host
computer’s transfer module. The user has control of the three control modules.
Some important points are:
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The acquisition module writes frames to the camera’s circular frame buffer memory. When all
buffers are written, the next acquisition overwrites a previously stored image (this also
generates the ImageLost event).
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The camera transfer module is independent of the acquisition. It allows the acquisition to run
continuously ignoring any interruption by network delays or traffic on the connection with the
controlling host computer.
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The host computer has independent control of the host transfer module, allowing the host
application to optimize receiving image packets and other tasks running on the host.
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Important: Under user controlled transfers, the feature TransferOperationMode sets the
transfer as either continuous or a specific image frame count (MultiBlock). The transfer frame
count is set by the feature TransferBlockCount, which must be equal or less than the number of
image frames available in the camera’s circular frame buffer (else the command is rejected).
The feature transferQueueCurrentBlockCount is used to read the available buffer count before
starting a block count transfer.
FB 1
FB 2
FB 3
FB 4
FB 5
FB 6
FB n
Acquisition
:
Write
Index
Camera
Read
Index
Circular Frame Buffer
Transfer
Host
Computer
Transfer
Module
Camera Transfer
Module
Figure 42: Camera Circular Frame Buffer
