[time-nuts] RE: phase locking Rb to GPS (was time-nuts Digest, Vol 14, Issue 30)

Christopher Hoover ch at murgatroid.com
Sun Sep 18 14:40:36 EDT 2005

On 9/18 "Tom Clark, W3IWI" <w3iwi at toad.net> wrote:

   The frequency knob that you tweak to correct the Rb frequency
   passes some tens of ma thru a coil surrounding the RF interaction
   region. If you try to phase lock a Rb to GPS, you need to develop
   a current source error signal.

Hmmm ... can you say more about this current source error signal?    

I've been thinking of locking my Rb standard to GPS.  I was simply going to
use the same circuit (1 pps, 10 MHz in; analog EFC voltage out) that I have
running with my OXCO but with different filter and EFC DAC coefficients.

So is this not sufficient to phase lock GPS to a Rb standard?

-- Christopher.

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