Hi Paul, > I guess I would ask what the goal of the effort might be. > It seems like a good answer. One thing I was amazed buy was that back in > the 1960s HP wrote some papers on using WWVB. What they did was check the > offset at distance everyday about the same time. This offered quite a bit > more accuracy and avoided all of the night propagation effects. Essentially > from day to day the path is about the same. Interesting, do you know where I could find such papers ? > If your system is stable enough could you simply put it in holdover at > night? I don’t think so. It is quite sensitive and when uncoupled the VCO drifts significantly. > The other question I had is how do you then use the locked crystal > oscillator at 5.184 Mhz? > Does it somehow divide down to a useful number?
5184000 =2e9 × 3e4 × 5e3 which leads to 200 possible divisors Among which : 1000 ; 2000 ; 4000 ; 6000 ; 8000 ; 9000 ; 162k ; 192k …. I am using the PPS to lock other oscillators One could use another OCXO frequency (typical 10MHz) and phase lock on an intermediate common divisor such as 2000Hz or 4000Hz etc... I am currently looking at this option but it is more complex and not sure it would provide better performances. > Nice project and good luck. Looking forward to hearing more. > Regards > Paul > WB8TSL Thank you, Best, Gilles. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
