Shad-o-Scan User Manual, Rev04
21
Shad-o-Scan 3001/4501 X-Ray Detector
Teledyne DALSA
GigE Vision framework for Sapera LT installation
The GigE Vision framework installs the GigE Vision Module for Sapera and includes
the Network Imaging package which is required to access a GigE Vision detector.
Refer to the “GigE Vision Module for Sapera” user manual and “Network Imaging
Mo
dule for Sapera LT” user manual which are included in the installation.
Optimizing Settings
The performance of the 5Gigabit Ethernet connection on the host computer generally
can be improved by adjusting some settings in the NIC. The below advices refer to
the NIC Asus XG-C100C adaptor. For a more detailed explanation please refer to
“Network Optimization Guide (PDF)” and “Network Imaging User’s Manual (PDF)”
which is part of the Sapera LT software package.
To reduce the interrupt overhead in the host the following settings in the NIC are
advised.
Packet Size
For a good 5Gigabit Ethernet connection with minimal packet resend conditions, host
computer performance can generally be improved by increasing the data packet size.
Each streaming video packet causes an interrupt in the host computer. Therefore
increasing the packet size reduces the CPU overhead required to handle video data
from the 5GigE Vision detectors.
A standard packet can have a size up to 1500 bytes. Many network cards support a
jumbo packet mode that can extend that size up to 16Kbytes. In theory, a packet could
be as large as 16 KB, but the CRC (cycle redundancy check) containing the checksum
of each packet is not as efficient when the packet size grows larger than 9000 bytes.
For this reason
we advise to set the packet size to 9014 bytes
(jumbo packet enabled).
Some system and network card configurations may have difficulty streaming and
handling jumbo packet data. If the system is having issues than it is advisable to
disable the Jumbo Packet setting and use standard size packets of 1500 bytes for your
application.