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" <[email protected]
<mailto:[email protected]>> 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.
