[time-nuts] FE5680 DDS plot

Javier Herrero jherrero at hvsistemas.es
Thu Feb 2 09:13:59 UTC 2012

Great plot :)

I've a dump of the SPI transfers during a night taken with the logic 
analyzer... but have found no time yet to process the dump to extract 
the transfers. Of course it is easier to take it from the serial port 
data :)

The adjustment looks quite closely related to the temperature.



El 02/02/2012 06:15, Scott Newell escribió:
> Javier Herrero's exciting DDS discovery led to this plot of the unit 
> tweaking the frequency (cmd 0x22):
> http://n5tnl.com/time/fe-5680a/graphs/dds_autotuning.png
> It appears to make an adjustment even before lock!

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