[time-nuts] using Fury GPSDO with Rb

SAIDJACK at aol.com SAIDJACK at aol.com
Fri Apr 18 13:45:51 EDT 2008

Hi Scott,
that's a great success story!
What final Loop settings do you use on the Fury with LPRO-101?
It would be interesting to see if the +-10ns temperature related deviations  
are coming from the LPRO or maybe the GPS, DAC etc? What is the EFC change  
over these temp changes?
With the external clock source, it is not easy to use the temperature  
compensation of the Fury, but it could be done - need a current sink that is  
sensitive to temperature and uses about 50 - 200mA, that can be used as a highly  
accurate temperature sensor for the compensation routines.

The digital temperature sensor on the Fury has only 1/16 Deg C  resolution, 
not nearly enough to do accurate temperature compensation.
In a message dated 4/18/2008 09:21:01 Pacific Daylight Time, smace at intt.net  

It's  working well with the LPRO-101.  It stays typically within +-3ns
with  excursions to +-10ns based on temp changes (hvac cycling, etc.)
It is very  apparent when you plot the temp sensor on the fury.


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