Lux, James P skrev: > Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Magnus Danielson >> Sent: Tuesday, January 13, 2009 3:01 PM >> To: Discussion of precise time and frequency measurement >> Subject: Re: [time-nuts] Sound cards >> >> L >>> Consumer audio optical links (TOSlink) are 1000 micron >> (yes, it sounds >>> better than 1mm) plastic fiber, which is fairly high loss >> (1000 dB/km), which is fine for 1-2 m cables. TOSlink is >> actually a trademark of Toshiba >> http://www.toshiba.com/taec/components/ProdLineGuide/toslink.p >> df describes all. >>> TOSlink has worked fine for me, except in one case, where >> the cable was flexed a lot, and it eventually developed >> cracks and the loss shot up. >> >> Trouble is, many want some 10 m runs. > > Exactly.. I was just down in the lab, and looked at the cables we have strung > all over the place, and for us, a 2m cable is positively short. An awful lot > of 5m and 10m cables just patching one thing to another (consider going from > a connector on a piece of equipment in one 2m high rack to a connector in > another 2m rack. There's 3-4 m just in going up and down, not to mention the > meter or so across, if the racks happen to be side by side. > > There ARE fancier cables and connectors in the same family that have more > range, but are still pretty cheap components. > > The galvanic isolation and EMI immunity IS attractive. But, a piece of RG-58 > sized coax and BNC connectors is awfully common and convenient.
On the other hand, I am used to stretch out for a 25 km or 50 km roll of fiber. Works very well for 2,5 Gb/s or 10 Gb/s links. The price for decent enought multimode should be more or less dirt cheap by now, and we are talking real glas. Cheers, Magnus _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
