USB3 and LabJack Devices
2 replies to this topic
Posted 27 July 2012 - 05:33 AM
Hi, are there any changes to requirements using high-speed hubs for best timing when using a USB3 port, have you done any timing tests to see how using a USB3 port directly affects timing? Is it better to get a USB3 hub if using a USB3 computer port? Thanks!
Posted 27 July 2012 - 07:54 AM
The question is whether a USB 3.0 hub with support for the new "Super Speed" transfer rate provides any improvement on data rates with the "Full Speed" LabJacks (U3, U6, UE9). Note that with previous USB specs, the version number told you what data rates can be supported, but not which data rates are supported. That is, a USB 2.0 device can by spec support up to "High Speed", but it does not have to, and might just support "Full Speed" or "Low Speed". My understanding is that the USB 3.0 spec has changed this, and that a USB 3.0 host/hub/device must support "Super Speed". I just ordered a "D-Link DUB-1340" so we can do some tests. Not sure if we have any computers with a USB 3.0 Super Speed host, though.
Posted 20 September 2012 - 12:39 PM
We did these tests and generally found very little difference with a USB3 hub compared to USB2.
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