On Sunday 23 April 2017 01:58:32 Erik Christiansen wrote: > On 22.04.17 21:24, Gene Heskett wrote: > > I watched the local cable folks install a fiber link from our studio > > output to the cable head end in Enterprise WV, 39 klicks long as the > > cable went. This was in about 1998. Had to send the splicer back > > and get new knives or something in it, but when it came back, the > > first cut & termination they did was good. 0.47 db of loss in that > > 39 klicks of fiber. I half expected 15 to 20 db of loss. Blew me > > away. I probably failed but tried not to look impressed. > > Have to admit that I would have expected at least the same. I'm not > sure the tech wasn't referring to the termination loss, though - that > would be half a dB for a good termination or splice, if my wet RAM's > refresh cycles are holding up. Back in the late 80s, when we were > designing 565 Mb/s optical fibre transmission equipment for the Aussie > telco, they installed a regenerator every 50 km up the coast. The > remote power feed unit was a switchmode constant current generator > with 300 Vdc o/c and enough oomph to power about 1000 km of > regenerators. We called it the "Death Machine", and I was very happy > to concentrate on the telemetry and alarm system instead, with its > microprocessors and much more forgiving firmware.
:) > Erik I don't think one could get such a supply past the ULabs here. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
