I'm down for buying a handful whenever you decide to make something.
Output from the RackInjector management port and/or a dedicated device
could be extremely useful. Hmm. How about ieee1588v2 PTP? That would be
cool.
On 9/6/2017 10:34 PM, Forrest Christian (List Account) wrote:
My rough draft here is a USB-serial interface with an isolated DC-DC
converter and a isolated usb-serial interface, so you are at least
mostly electrically and opto isolated from the SBJ. Plug into a USB
and then power the SBJT. So USB to a small box, then cat5 to the
SBJ. This is a small enough and fun project that it will probably
just happen and fairly quickly - I need a few of these after the
nightmare of the rackinjector (think of it as a working vacation).
I've also had on the todo a NTP all in one appliance, probably in the
SBJ or SB12 box. That same code would make it into the rackinjector
and any followon similar products. There are quite a few things ahead
of it on the roadmap though...
On Wed, Sep 6, 2017 at 2:45 PM, George Skorup
<george.sko...@cbcast.com <mailto:george.sko...@cbcast.com>> wrote:
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.
--
*Forrest Christian* /CEO//, PacketFlux Technologies, Inc./
Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602
forre...@imach.com <mailto:forre...@imach.com> |
http://www.packetflux.com <http://www.packetflux.com/>
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