Neon John wrote: > On Thu, 1 May 2008 11:13:48 +0100, "Alan Melia" <[EMAIL PROTECTED]> > wrote: > > > >> At least with the optical cables it is only the powerfeed circuit that gets >> the surge not the amplifier front end as it was in the FDM systems. >> >> I always thought the terminal equipment was a slighly lower reliability >> requirement than the submerged parts but these days the loss of revenue even >> with an easily accessed terminal is very high. >> > > Now I'm curious how power is tapped off at each repeater point. I understand > the daisychain architecture but I'm wondering about the details, what > components can withstand the intial high voltage surge as the cable is > charging and how the voltage drop at each repeater is maintained relatively > constant, even if the repeater fails and quits consuming power. > > Also, is it true that an optical cable will keep working with a single > repeater failure, that the laser light will pass through unamplified? Seems > like I read that somewhere but I'm not sure. > > John > > -- > John De Armond > John
Try a shunt regulator. This works well because of the constant current feed. Bruce _______________________________________________ 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.
