Hi Probably the most direct route would be to simply buy a GPSDO with the “normal” 10 MHz output. Then build a “synthesizer” to convert that 10 MHz into whatever the radios need.
Since GPSDO’s need to run for a while (days …) to achieve reasonable accuracy, something based on a light weight Rubidium might make sense. Bob > On Jan 22, 2022, at 12:48 PM, Patrick Barthelow <apollo...@gmail.com> wrote: > > Looking to increase accuracy of a microwave transceiver pair designed to > measure very long distances (*up to even 100km, Line of sight) > They send a microwave carrier, modulated by HF radio modulation sine waves. > To an identical Transceiver at the far end. Which sends the modulated > carrier back. and phase comparisons of emitted and returned sigs are > compared and precisely quantified. Most instrument specs from the old > days are still pretty good, +- a centimeter or so, and a ppm variation > with total distance. --In 40-60km High accuracy stuff needs good > meteorology data along the line measured, which affects c = speed of radio > waves at the time of measurement. > The Modulation frequencies need to be either monitored continuously and/or > need to be stable to assigned values. Trying to modify internal frequency > reference of a pretty old system to GPSDO accuracy. > Anyone here that has done EDM work in surveying or Geodesy, etc? > Best, 73, Pat Barthelow AA6EG > apol <apollo...@gmail.com>lo...@gmail.com > > > *"The most exciting phrase to hear in Science, the one that heraldsnew > discoveries, is not "Eureka, I have found it!" but:* > "That's funny..." ----Isaac Asimov > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an > email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.