On Sun, 2008-01-20 at 23:09 -0700, Craig White wrote: > I was hoping that you could name just one commercially available USB > cable that was not usable for USB 2.0 I've come across the "Laser" branded USB cables, the sort of thing sold in supermarkets, that failed dismally with a DVD burner. I suppose that, next, you'd like to argue about cat 3 cable being perfectly adequate for gigabit networking. Never mind that it was never designed for it, in the first place. Typically, manufacturers design their products to a minimum expenditure. If they brought out a USB cable at the time that only 12 Mb/s USB existed, they'd design it for that, and wouldn't go the extra expense of making it fine at 480 MB/s, as well. Why would they? It's just a waste. That's a significant difference in signals (40:1), and there's quite a few reasons why it mightn't work (loss across the length, loss between the conductors, impedance issues getting more finicky with higher frequencies, etc.). But there's just one reason why it might work - pot luck. Don't believe me? Ask the guys who work in RF on this list about RF cabling characteristics. But you better be good at maths and physics if you want to understand the proofs. -- (This computer runs FC7, my others run FC4, FC5 & FC6, in case that's important to the thread.) Don't send private replies to my address, the mailbox is ignored. I read messages from the public lists.
