[time-nuts] Open source GPSDO

Murray Greenman denwood at orcon.net.nz
Thu Dec 6 18:28:41 UTC 2012

You can see my GPSDO source code for a mere $50. It comes with manual and 
executables. The executables alone are $20.

See http://www.qsl.net/zl1bpu/MICRO/SIMPLE/SimpleGPS.htm

While this design does not use a Kalmann filter, it has pretty good 
holdover, and you can see how the phase detector, error integrator, filters, 
PID controller and D-A converter etc are done. The hardware is pretty 
simple. There is a PC monitoring and control program.

Murray ZL1BPU

----- Original Message ----- >
> As a lurker, I just want to chime in and say that I for one would love
> to see an open-source GPSDO implementation. [snip] 

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