http://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html <http://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html> Justin Wilson j...@mtin.net
www.mtin.net www.midwest-ix.com > On Sep 6, 2017, at 5:50 PM, Mike Hammett <af...@ics-il.net> wrote: > > I know that Brian at Baltic built a bunch of custom MT-based setups for one > of his customers that came with a USB GPS receiver that output NEMA that the > MT could read. > > > > ----- > Mike Hammett > Intelligent Computing Solutions <http://www.ics-il.com/> > <https://www.facebook.com/ICSIL> > <https://plus.google.com/+IntelligentComputingSolutionsDeKalb> > <https://www.linkedin.com/company/intelligent-computing-solutions> > <https://twitter.com/ICSIL> > Midwest Internet Exchange <http://www.midwest-ix.com/> > <https://www.facebook.com/mdwestix> > <https://www.linkedin.com/company/midwest-internet-exchange> > <https://twitter.com/mdwestix> > The Brothers WISP <http://www.thebrotherswisp.com/> > <https://www.facebook.com/thebrotherswisp> > > > <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg> > From: "George Skorup" <george.sko...@cbcast.com > <mailto:george.sko...@cbcast.com>> > To: af@afmug.com <mailto:af@afmug.com> > Sent: Wednesday, September 6, 2017 3:45:42 PM > Subject: Re: [AFMUG] GPS'd NTP > > Apparently there are USB sticks that are basically a GPS receiver and a > PL2303 for $30-40. So you get the date/time. Cool. Then they take the 1PPS > output to blink a f***ing LED. Really!? I was reading some blogs where folks > have opened them up and wired a super tiny jumper from 1PPS to DCD. That was > about 5-6 years ago using older SiRF receivers, too. Meh. > > A GPS+GLONASS SBJ basic and USB kit would be pretty cool. Could the USB > interface also power the box, up to say 20-25 feet? The other thing is, all > of the machines I'm working with have a serial port. So maybe just skip the > USB altogether? > > I was thinking, maybe take the daisy-chain output from a > SyncInjector/PowerInjector/RackInjector since those switch the pipe/box to > NMEA anyway, but I don't think I'd want a path from the tower-mounted gear to > server(s). And other funky stuff like noise making it into the timing for the > radios would be ungood. > > On 9/6/2017 2:10 AM, Forrest Christian (List Account) wrote: > I could tell you how to wire a syncbox junior up to a usb port if you'd like. > Requires a TTL level usb to serial cable. > > I'd you wait a month or so until the gps+glonass version is out it well even > speak nmea. Heck, now I think about this it might make a good product.... > syncbox basic plus a USB dongle. > > On Sep 5, 2017 8:19 PM, "George Skorup" <george.sko...@cbcast.com > <mailto:george.sko...@cbcast.com>> wrote: > I've got a few CentOS machines running around the network doing various > tasks, one being NTP for radios, routers, switches, etc. I've been having > some issues with us.pool.ntp.org <http://us.pool.ntp.org/>lately. I switched > to time-(a,b,c,d).nist.gov <http://nist.gov/>. Apparently those are pretty > busy. > > So is anyone else using GPS to feed NTPd? From what I've been reading, I > guess I need a 1PPS capable receiver. Does that exist in a simple USB > package? That would be ideal, preferably with an SMA female for an external > antenna where needed. Looks like none of the cheap shit I'm finding on Amazon > has PPS output.
