On a related note is anyone aware of PC controlled (Ie. RS232 or maybe GPIB ?) DAC's that would be suitable for this type of application ?
I've also contemplated simply using the DAC of a TBolt but it would seem to be waste of a Tbolt. I'm thinking along the lines of something that might acquired used on an auction site. --- On Fri, 12/30/11, Hal Murray <[email protected]> wrote: > From: Hal Murray <[email protected]> > Subject: Re: [time-nuts] Thunderbolt? (re simple gpsdo.) > To: "Discussion of precise time and frequency measurement" > <[email protected]> > Received: Friday, December 30, 2011, 1:16 PM > > > "What is the simplest design for a GPSDO that uses > only the PPS signal from > > a modern GPS?" > > Some sort of oscillator with a voltage control. > CPU with a timer/counter that can capture the PPS. > DAC. > Software. > > Drive the CPU from the osc so you can count cycles between > PPS pulses. Use > the DAC to adjust the frequency. Build a low pass > filter in software. > > The DAC may be the tricky part. You would like lots > of bits, but it also has > to be stable. > > With a given DAC, you can get finer control by trading off > range. > > > > -- > These are my opinions, not necessarily my employer's. > I hate spam. > > > > > _______________________________________________ > 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. > _______________________________________________ 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.
