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| Thread ID: 60259 | 2005-07-27 04:00:00 | USB cables | slofox (5767) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 375856 | 2005-08-21 02:34:00 | Good quality USB1 . 1 cables should work perfectly on USB 2, if they are not too long . I would be dubious about the maximum length ones (5m) working . 2m and less will probably work . If they don't "work", they do that by not running at the USB 2 speed . It's the tranceivers at each end which decide what speed will work for a connection . If they can't work at the top speed, they cut back to 1 . 1 speed . The main difference between the cables is more tightly controlled impedance and losses in the twisted pair which handles the data . Remember this is UHF signalling in a transmission line . The power wires are not as critical, but I have seen some cables with heavier power wires . (Not much heavier, just a couple of gauges in the area of 24 to 26 SWG) . I don't think the standard requires a shield . . . the twisted pair is intended to give the noise immunity . It's a balanced cable . Like all "commodity" cables, there are various qualities on the market . Some are much cheaper than others . Some are better than others . It costs nothing to try a cable you've got . If it works, put a tag on it for future reference . But it might not work on a different USB 2 device . ;) |
Graham L (2) | ||
| 375857 | 2005-08-21 03:44:00 | I have just purchased a usb2 storage device, comes with a short cable with 'RFI bulge' near one end . I also have a usb 1 . 1 cable for a camera (with the same bulge) . both cables are virtually identical with no apparent indication if 1 . 1 or 2 . 0 on them . The only thing I can find on the new usb2 cable is a very tiny number '2' on one of the plugs on the round part just where it changes into the flat rectangular head of the plug . Can't say if all usb2 plugs have this, or if it is meant to denote usb2 connectivity, but maybe you can look on your cables (it's pretty hard to see though!) This could become an issue with a few different 1 . 1 and 2 . 0 cables lying around unless you own a crystal ball :D |
Shortcircuit (1666) | ||
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