Hi > On Mar 5, 2017, at 6:31 AM, Trevor N. <q...@comcast.net> wrote: > > On Sat, 4 Mar 2017 20:39:45 -0800, you wrote: > .... >> Matthias Jelen did a test on the Trimble Thunderbolt here: >> >> https://www.febo.com/pipermail/time-nuts/2014-September/086664.html >> https://www.febo.com/pipermail/time-nuts/2015-May/091805.html >> https://www.febo.com/pipermail/time-nuts/2015-May/091825.html >> > .... > > Thanks for the links, I didn't see the 2015 test. Currently the older > Spirent simulators are going for very resonable prices on the 'bay. > The GSS4100 can be had for under $200 and 6100s frequently pop up for > $150.
One thing a 6100 will let you do is to calibrate the PPS out of your “gizmo” to +/- 5 ns (one sigma). While it’s not an impressive number by TimeNuts standards, it is one of the few ways to get that job done. > Anything newer is still very expensive, though. It may be > necessary to use a multichannel simulator for newer receivers (or > multiple synchronized single channel units), as I haven't yet been > able to get the Trimble Resolution boards to go into overdetermined > mode with a single simulated SV. It would be a bit alarming if you *could* get it to show overdetermined with only a single clock source :) Bob > _______________________________________________ > 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.