On Mon, April 4, 2016 11:18 am, Tom Holmes wrote: > The preceding questions always come up when a newbie > comes up on the list wanting to build their own GPSDO.
It is good to make sure the person actually wants to build a GPSDO. A few years back I was in a similar position, and my answer was I actually needed a high accuracy reference to check frequency accuracy of some clocks, and the recommendation was just get a Thunderbolt. I didn't know about surplus GPSDO's available so that was good advice for me, I didn't actually >want< to build a GPSDO myself. It would have been fun, but the end goal was more important to me. So I think really the first question should be do you want to build a GPSDO, or do you want a high accuracy time and frequency source for its own use? Because if you want to own a GPSDO to use, building one yourself is probably not the way to go. Get a surplus unit, or save up a little more and get a new Jackson Labs. If you just like to build stuff and a GPSDO is the particular stuff you want to build next, then go ahead and have fun. Chris Albertson's arduino based design is probably as good a place to start as any, it should be cheap and I think the pieces are easier to find than that CPLD based design that relies on having a GPS that can output 10kHz instead of just PPS. -- Chris Caudle _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
