On Sat, Apr 14, 2012 at 8:00 PM, Bill Dailey <[email protected]> wrote:
> Why not do this... Should be cheaper and offer better performance.. > Especially short tem. > > http://www.jrmiller.demon.co.uk/projects/ministd/manual.pdf > > The short term performance of a GPSDO is defined by the short term performance of the OCXO. I think the proposed device that was quoted at $300 used a TXCO, not an OCXO. One could also use a double oven XO (DOCXO) One way to get good performance and low cost is to make the system modular. It breaks nicely into three parts 1) The GPS 2) A voltage controlled oscillator which could be a double oven OX or the cheaper TXCO or "whatever" 3) the GPSDO controller. As shown on the PDF file above these can be very simple. All GPS and most oscillators have about the same interface so an end user could choose his parts based on budget. If you'd build a stand alone controller that would accept timing pluses from a GPS from 1Hz to 1KHz and would output a voltage to control an oscillator you'd have a pretty popular device. The problem is the "competition". It is hard to build anything that is better than the Thunderbolt without spending more for parts than the price of a Thunderbolt. Chris Albertson Redondo Beach, California _______________________________________________ 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.
