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iPORT CL-GigE External Frame Grabber User Guide
Calculating the Required Bandwidth
To calculate the approximate bandwidth that is required, use the following formula. Keep in mind that
this calculation results in an approximate value, and does not take into account Ethernet, IP, UDP, and
GigE Vision overhead. Note that each image is broken up into many packets, which should be considered
when determining overhead.
For example, for a CL-GigE configured with 1280 x 720, a 16-bit pixel format, and a
PayloadSize
of
1.84 MB at 60 frames per second, the equation would look like this:
Understanding the Factors that can Effect Bandwidth and
Performance
This section provides a summary of the features that you can adjust to maximize the bandwidth and
performance of your system. For detailed information, see the
Configuring Your Computer and Network
Adapters for Best Performance
knowledge base article, available on the Pleora Support Center at
Width, Height, and Pixel Format
The
Width
,
Height
, and
PixelSize
have a direct effect on the bandwidth that is used between the
CL-GigE and the computer. Increasing the width and the height of the image will result in larger frames
being streamed from the CL-GigE.
PayloadSize
is automatically calculated by the CL-GigE, based on the selected image settings, which
include
Width
,
Height
,
OffsetX
,
OffsetY
,
PixelSize
, and any padding that has to be added to the image
payload. To see the
PayloadSize
, open eBUS Player, connect to the CL-GigE, and then click
Device control
.
PayloadSize
appears in the
TransportLayerControl
category.
PayloadSize (MB) x 8 x Frames Per Second = Bandwidth (Mbps)
1.84 MB x 8 x 60 Hz = 883.2 Mbps
If you experience streaming errors or warnings, such as AUTO_ABORTED, MISSING_PACKETS, or
BlocksDropped, see the
Stream Control Application Note
, available on the Pleora Support Center.
