Here's what I ended up with: COARSE DAC : 105 DAC GAIN: 1200.00 EFC SCALE : 1.40 EFC DAMPING: 2 OCXO SLOPE : POSITIVE TEMPERATURE COMPENSATION : 0.00 AGING COMPENSATION : 0.02744 PHASE CORRECTION : 35.000000
Here are some plots: http://www.intt.net/time-nuts/export.png http://www.intt.net/time-nuts/export_temp_spike.png Everything is on an open work table right now, with the LPRO mounted on a heatsink. The baseplate of the LPRO is about 38C. I have not tried too much to adjust EFC damping either, it seemed that if it had more than 10 it would become unstable. Scott [EMAIL PROTECTED] wrote: > 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. > > bye, > Said > > > In a message dated 4/18/2008 09:21:01 Pacific Daylight Time, [EMAIL > PROTECTED] > writes: > > 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. > > Scott > > > > > > **************Need a new ride? Check out the largest site for U.S. used car > listings at AOL Autos. > (http://autos.aol.com/used?NCID=aolcmp00300000002851) > _______________________________________________ > 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. > > _______________________________________________ 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.
