John, Fantastic job on reverse engineering the counter and then actually doing something to modernize it. I might guess implementing this on one of the counters out of 3 would be both educational and interesting. Ending up with a modern on the network counter.
Took a look at your setup and bench. So the support for the 5370 is a HP vector network analyzer. Now thats some support. :-) I might tend to have the two flipped in the stack. So you are suggesting the potential to make this operational to a wider audience. Any thoughts on a timeline? I personally have no problems soldering in 40-60 wires from a daughter board as an example. Regards Paul WB8TSL On Sun, Jul 24, 2011 at 8:12 AM, Bruce Griffiths <bruce.griffi...@xtra.co.nz > wrote: > Poul-Henning Kamp wrote: > >> In >> message<77E0FBA5-AA78-4399-**9562-d1274e109...@jks.com<77e0fba5-aa78-4399-9562-d1274e109...@jks.com>>, >> John Seamons writes: >> >> I would worry a bit about the PLL locking too, but I have no idea how >> to actually measure it. >> >> I think the 1sec max gate-time is related to the eventcounter width, >> but it might be possible to simulate a wider counter in software. >> >> The obvious idea for advanced functionality is calculation of >> allan deviations >> >> >> > The PLL sample frequency is around 0.8MHz so that trigger rates approaching > this will alter the PLL loop parameters. > Trigger rates greater than the PLL sample frequency (200/256MHz) will > likely cause lock to be lost. > The 5359 (uses the same vernier oscillator assembly) overcomes this by > using a digital sample and hold to set the VCO control voltage. > However periodic auto calibration by closing the loop is required to avoid > drift. > > Bruce > > > ______________________________**_________________ > time-nuts mailing list -- firstname.lastname@example.org > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- email@example.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.