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CM-080GE/CM-080GE-RA / CB-080GE/CB-080GE-RA
8.3.2 Video data rate (network bandwidth)
The video bit rate for CM-080GE/CM-080GE-RA and CB-080GE/CB-080GE-RA is:
Model
CM-080GE/CM-
080GE-RA
CB-080GE/CB-
080GE-RA
♦ In case using Jumbo Frame, the packet data will be improved 2 %.
♦ For CM-080GE/CM-080GE-RA and CB-080GE/CB-080GE-RA, the jumbo frame can be set at
maximum 4040 Bytes (Factory setting is 1428 Byte). To set Jumbo Frame, refer chapter 8.2.4.
8.3.3 Note for setting packet size
The packet size is set to 1428 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 CM-140GE and CB-140GE sereis can support a maximum of 4040 byte
packets provided the NIC being used has a Jumbo Frames function with a setting of a
4040 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.
8.3.4 Calculation of Data Transfer Rate
In order to calculate the data transfer rate, the following parameters and formula are
required.
Setting parameter
Item
Image Width
Image Height
Bits per Pixel
Frame Rate
Packet Size
Number of Packets (including Data Leader & Trailer
Packet)
Data Transfer Rate
Fixed value
Item
Data Leader Packet Size
Data Trailer Packet Size
Pixel Type
MONO8
MONO10_PACKED
MONO10
BAYRG8,BAYGB8
BAYRG10,BAYBG10
Packet data volume
(In case the Packet size is 1500)
200 Mbit/s
300 Mbit/s
400 Mbit/s
200 Mbit/s
400 Mbit/s
Unit
[pixels]
[pixels]
[bits]
[fps]
[Bytes]
[packets]
[Mbit/s]
Unit
[Bytes]
[Bytes]
- 30 -
Symbol
A
B
C
D
E
G
J
value
90
64
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