JAI AT-140GE - Manual (Page 27)

AT-140GE
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9.2.1 Guideline for network settings
To ensure the integrity of packets transmitted from the camera, it is recommended to follow
these simple guidelines:
1. Whenever possible use a peer-to-peer network.
2. When connecting several cameras going through a network switch, make sure it is
capable of handling jumbo packets and that it has sufficient memory capacity.
3. Configure inter-packet delay to avoid congestion in network switches.
4. Disable screen saver and power save functions on computers.
5. Use high performance computers with multi-CPU, hyper-thread and 64-bit CPU, etc.
6. Only use Gigabit Ethernet equipment and components together with the camera.
7. Use at least Cat5e and preferably Cat6 Ethernet cables.
8. Whenever possible, limit the camera output to 8-bit.
☞ For more details regarding network settings, please refer to the “Getting Started Guide” which
is a separate document.
9.2.2 Video data rate (network bandwidth)
The video bit rate for the AT-140GE in Continuous mode is:
Model
Pixel Type Frame Rate Packet data volume
(assumes the packet size is 4036)
AT-140GE RGB8Packed 20.77 fps 732 Mbit/s
RGB10V1Packed
RGB10V2Packed 20.77 fps
(Note 1) 972 Mbit/s
Note1: depending on the packet size, the frame rate of 20.77 fps may not be achieved. It
may be reduced to 18 to 19 frames per seconds. This figure will depend of the system
configuration used (RESEND not possible)

If Jumbo Frames (Max.16020) are not used, the packet data will be bigger by 2%.

If Jumbo frames are used, the packet size may be automatically optimized to a smaller size.

For details of setting Jumbo Frames, please refer to the “Getting Started Guide”.
9.2.3 Note for setting packet size
The packet size is set to 1476 as the factory default. Users may enter any value for the
packet size and the value will be internally adjusted to an appropriate, legal value that
complies with the GenICam standard. The packet size can be modified in the GigE Vision
Transport Layer Control section of the camera control tool.
Regarding data transfer rate, a larger packet size produces a slightly lower data transfer
rate. The AT-140GE can support a maximum of 16020 byte packets provided the NIC being
used has a Jumbo Frames function with a setting of a 16020 bytes or larger.
Caution: do not set the packet size larger than the maximum setting available in the
NIC or switch to which the camera is connected . Doing so will cause output
to be blocked.