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Acquisition Buffering
All acquisitions are internally buffered and transferred as fast as possible to the host system. This
internal buffer allows uninterrupted acquisitions no matter of any transfer delays that might occur
(such as acquisition rates faster that the Gigabit Ethernet link or the
IEEE Pause
frame). Only when
the internal buffer is consumed would an Image Lost Event be generated.
The camera has 1 block of 256MB. A portion of the memory could be reserved for packet resends
but at the loss of accumulating frames.
Using Transfer Queue Current Block Count with CamExpert
This feature returns the number of frames buffered within the Linea GigE pending transfer to the
host system. Image lines/frames are buffered in cases where the host system is temporarily busy
or cases of high network traffic with other devices through the same Ethernet switch. By buffering
image frames, the Linea GigE will not need to drop data when there are temporary delays to the
transfer.
When using CamExpert, right click on this field and then click on Refresh from the pop-up menu.
The current frame count in the transfer buffer is displayed in the Value field. During live grab, if the
number of frames in the transfer buffer is increasing, then there is a problem with the network or
host bandwidth being exceeded. The ImageLost event occurs when all buffer space is consumed.
82 • Operational Reference
Linea GigE Series Camera
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