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Alvium USB Cameras User Guide V3.3.0
Compliance, safety, and intended use
USB connections
USB 3.0 and 3.1 Gen 1 host controllers and hubs
To avoid damage to USB 3.0 or 3.1 Gen 1 host controller cards or hubs, make sure
these components provide sufficient current supply for the connected cameras.
For suitable USB 3.0 accessories, see the Alvium Cameras Accessory Guide at
www.alliedvision.com/en/support/technical-documentation/
alvium-usb-documentation
under Additional documents.
If suddenly your camera is not recognized anymore, check for a crashed USB hub.
Disconnect the USB and power supply cable from the hub. Reconnect both.
USB cables
Proper cable handling enables reliable performance:
•
Use only shielded cables to avoid electromagnetic interferences.
•
Please use cables recommended by Allied Vision.
•
Avoid unnecessary bending to prevent damage to the cables.
•
Avoid coiling to prevent electromagnetic interference.
Alvium USB cameras and USB 2.0
If Alvium USB cameras are connected to USB 2.0 ports, they are recognized. They
can be operated with reduced performance only if
DeviceLinkThroughputLimit
is set to a value supported by USB 2.0. See
Operating systems and bandwidth
page 196. Some pixel formats may not be supported.
Handling bare board cameras
Bare board cameras are an electronic assembly without a protective housing. To
avoid damage:
•
Handle bare board cameras with extreme care.
•
Avoid any mechanical stress to the sensor area.
•
Avoid short circuits by keeping away from electronics components.
Observe for mounting bare board cameras:
•
Allow mechanical contact only at the mounting area. (This does not apply to
the cooling areas.)
•
Enable proper cooling at the cooling areas, see
No image transfer at high bandwidths
USB 2.0 supports maximum 50 MBps. If cameras require a higher bandwidth than
50 MBps for streaming, no image is transferred on a USB 2.0 bus. The bandwidth
used by a camera results from
DeviceLinkThroughputLimit
, the image
resolution, sensor characteristics, and pixel format (Mono8 has 8 bits per pixel,
while RGB8 has 3 × 8 bits per pixel).