[time-nuts] DC Voltage Ramp?

Tom Van Baak tvb at leapsecond.com
Sun Sep 4 01:34:01 EDT 2005

> I was thinking of using a Datum 1000B Ultra Stable Oscillator (the one 
> used in the FTS 4060 Cesium standard).  The data sheet says that after a 
> few years the aging rate gets down to parts in E-12/day.  I would think 
> that the Allan plot would be cleaner if the control voltage was well 
> behaved than if it was derived from a noisy process like GPS or maybe 
> Cesium.

The 1000B makes a good standalone standard.

What tau range of the Allan plot were you thinking
of making cleaner?

Note that frequency standards like the HP 105B
use a very clean control voltage: a 10k pot.


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