On 2010-03-25, E-Mail Sent to this address will be added to the BlackLists <[email protected]> wrote: > unruh wrote: >>> You said: "In most cases, it is easier to solve the >>> problem of sync'ing all computers to a correct timesource >>> (and thus all be mutually in sync)...". >>> I think I agree with that principal, though I don't yet >>> feel I know enough to 'do it'. Would like to have your >>> (and others') help in learning the nuts-and-bolts of >>> understanding that, and how to accomplish it. >> >> It means that you have one ( or two ) computers sync to >> an external source and then use that machine as the >> source for the others. > > It doesn't have to be an "external source", if cheap is > not a goal, and isolation from the rest of the world is. > > They can get their own in-house frequency standard(s), > to PPS discipline their NTP server(s). > > > I'm certain the sales people at Symmetricom could provide > them with NTP servers that don't make use of any outside > world references.
Sure, for a few tens or hundreds of thousands of dollars. When a gps puck is $100, plus some wire. I would suspect that they would be more willing to spend $200 for a p\gps puck and some wire, than $100000 for a H Maser clock, but who knows, maybe not. On the other hand all he wanted was to sync the computers to each other, and learning about orphan mode should only cost a few $100 in his time and salary as well. > <symmetricom.com/products/ntp-servers/modular-ntp-solutions/> > > symmetricom.com sells Cesium, Rubidium and Hydrogen Maser Standards > > quartzlock.com sells Rubidium Standards > (and used to sell Hydrogen Maser Standards?) > > novatech-instr.com sells Rubidium Standards > > > Selecting a Primary Frequency Standard for a Calibration Laboratory > (Cal Lab Int. Jour. of Metrology, April 2008, pp. 33-39) > <tf.nist.gov/general/pdf/2289.pdf> > > _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
