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Actually I'm not sure, I don't know much about the spec, but I know that USB 3 has certain pairings similar to ethernet, but USB 2 doesn't have those. If the c

Actually I'm not sure, I don't know much about the spec, but I know that USB 3 has certain pairings similar to ethernet, but USB 2 doesn't have those. If the cable he's using is shielded by ground then I think it might be up to USB 2 spec? Edit: Interesting mini-comparison of USB 1 and USB 2 http://ww3.microtek.com.tw/tw/uploads/faq/pdf/comparison-usb2.0-cable3.pdf http://ww3.microtek.com.tw/tw/uploads/faq/pdf/comparison-usb...

miahi 7y ago
Shielding doesn't mean it meets the required impedance/attenuation for the USB frequencies. USB uses the same idea as Ethernet (differential signaling) so you can make an analogy - Ethernet requires different cable specifications depending on the speed, and it's the same with USB. And the same as with Ethernet, you can usually use a lower-specced cable for short lengths.
metaphor 7y ago
> Actually I'm not sure, I don't know much about the spec... See the USB 2.0 Cables and Connectors Class Document[1], in particular, 4.10.7 Test Group '6'. Why speculate when the USB-IF has made their standards both free and readily accessible? [1] https://www.usb.org/sites/default/files/CabConn20.pdf https://www.usb.org/sites/default/files/CabConn20.pdf