In Reply to: RE: ethernet cable and sound posted by Roseval on April 14, 2012 at 05:37:20:
. . . the standard requires an Ethernet card to be galvanic isolated.
For perfectly proper safety reasons at 50 or 60 Hz mains frequencies, yes they do but AFAIK they have little to say about the KHz & MHz range.
How much "galvanic isolation" is provided at these frequencies by a couple of generic NICs connected by fifteen metres of unshielded cabling and (as SC notes) who knows what by way of ground is a moot point. I'd have thought that a reasonably decent, locally grounded switching hub (i.e. one that regenerates data) with a short, not-so-antenna-like connection to the target device, though certainly not a cure-all, less likely to degrade local conditions less than the usual PnP (Plug and Pollute) rat's nest.
As ever, YMMV.
Dave
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Follow Ups
- RE: ethernet cable and sound - Ryelands 06:13:09 04/14/12 (1)
- RE: ethernet cable and sound - rick_m 08:17:35 04/14/12 (0)