[time-nuts] DC Voltage Ramp?

Brooke Clarke brooke at pacific.net
Sat Sep 3 18:30:10 EDT 2005


The actual oscillator that provides the output from a Cesium standard is 
  in fact a crystal whose fine tuning voltage has been locked to the 
Cesium source.

If the oscillator was run standalone and it's aging rate determined by 
using GPS then if the proper voltage ramp was applied the output would 
be very close to a Cesium source.  This may be a linear or parabolic 
ramp.  An example is plotted at: http://www.rt66.com/%7Eshera/index_fs.htm
but for Cesium quality the tuning voltage needs orders of magnitude 
smaller steps.

The problem is coming up with the voltage ramp.  I hear that the Austron 
2010B Disciplined Oscillator has steps that are too crude.  Has anyone 
come up with a viable way to do this?

Have Fun,


w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml

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