Thanks for this. This (and the other responses) were the type of answers I was hoping for.
The budget is probably up to several thousand for a robust COTS product that won't add significant operational hassles. (Kludging a laptop to run as an NTP server would be an example of a solution that would add operational hassles.) Equipment designed for rack mounting is a bit less than ideal (the equipment bay in the vehicle is not really set up for rack mounted gear) but we could probably work out a way to mount a one u device, and mounting a laptop adds it's own set of challenges, although a laptop can be mounted outside of the equipment bay. The ideal form factor would be something the size of a small paper back book (or smaller) that could be surface mounted or secured via clamps to a piece of tubing that is already in the equipment bay. Sent from my iPad On 2015-05-12, at 3:03 PM, Bob Darlington <rdarling...@gmail.com> wrote: > What's your budget? I've done this with 1U sized NTP servers from > Symmetricom (S300 and S350 systems) for mobile military use. These are a > few thousand bucks a pop. They're rugged, and held up just fine in places > the military goes.Compared to the rest of the system I was working on, this > was quite small in comparison and we used more than one at each location. > My personal one died recently so I'm working on developing a cape for the > BeagleBone Black. The prototype is working just fine so far so I'm moving > forward with a board layout and eventual sale to the list members if there > is any interest (I'm not asking for interest yet). > > -Bob > > On Tue, May 12, 2015 at 11:11 AM, Mark Spencer <m...@alignedsolutions.com> > wrote: > >> Hi sorry for a possibly OT post. >> Has anyone had practical experience with small commercially available time >> servers / ntp servers suitable for mobile use in a vehicle. >> >> The use case is I am in need of an accurate (ie. within 100 ms) time >> source for several pc's in moving vehicle. Being able to run directly >> off a 13.8 or 28 VDC source would be a major plus but AC power is also >> available. >> >> Hold over if there are gaps in GPS coverage is also a major plus. >> >> We already have a GPS with a 1 pps output, but an integrated box with it's >> own GPS would be best. >> >> Yes I am aware I could feed a 1 pps signal into a laptop and use that as a >> time server and I may end up going that route. >> >> There is a small Ethernet LAN in the vehicle. The pc's currently get >> their time via a wireless connection to various NTP servers. I need to be >> able to ensure accurate time on the PC's if there is no wireless coverage. >> >> >> This is for a one off project so piecing together various parts is an >> option but a single box COTS solution would be nice. I've found a few >> candidates via web searches but would welcome any feed back. >> >> Thanks in advance >> >> Mark Spencer >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
