BM-500GE / BB-500GE
33
8.3.2 Video data rate (network bandwidth)
The video bit rate for BM-500GE and BB-500GE is:
Note 1) This data rate depends on the system ( RESEND function is not available)
Note 2) This data is OB transfer mode.
In case using Jumbo Frame, the packet data will be improved 2 %.
For BM-500GE and BB-500GE, the jumbo frame can be set at maximum 4036 Bytes (Factory
setting is 1428 Byte). To set Jumbo Frame, refer chapter 8.2.4.
According to the Pixel Type, the packet size may automatically be set at it’s most suitable
value inside.
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 BM-500GE and BB-500GE series 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
Unit
Symbol
Image Width
[pixels]
A
Image Height
[pixels]
B
Bits per Pixel
[bits]
C
Frame Rate
[fps]
D
Packet Size
[Bytes]
E
Number of Packets (including Data Leader & Trailer
Packet)
[packets]
G
Data Transfer Rate
[Mbit/s]
J
Model
Pixel Type
Frame rate
Packet data volume
(In case the Packet size is 4036)
BM-
500GE
MONO8
15 fps
416Mbit/s
MONO10_PACKED
MONO12_PACKED
14 fps
624Mbit/s
MONO10
MONO12
11 fps
832Mbit/s
BB-
500GE
BAYRG8,BAYGB8
15 fps
416Mbit/s
BAYRG10,BAYBG10
BAYRG12, BAYBG12
11 fps
832Mbit/s
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