[time-nuts] Efratom FRK - no 10Mhz oscillator

[Hal Murray]

> Btw ...Is there any place in Austin, TX I could walk in with the Efratom and
> get a 'cesium' check on the Efratom and calibrate it even further??? Appears
> it has a trimmer for such.

If you move your gear to someplace strange, you have to consider warm up time 
and changes in temperature and local magnetic field and who knows what else.

You can calibrate it without help from a cesium.  Just use GPS and wait long 
enough for the short term noise to be insignificant.

One approach would be to use the 10 MHz from your Efratom FRK to drive the 
clock on one of tvb's picPETs and feed the PPS from your GPS to its event 
input.
  http://www.leapsecond.com/pic/picpet.htm

Then just collect the data for a day or week.


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