[time-nuts] Austron PRR-10 GPS discliplined Rb...

[Rob Kimberley]

Sold by Symmetricom, but actually manufactured by Kvarz in Russia...

Rob K


----- Original Message ----- 
From: "Magnus Danielson" <cfmd at bredband.net>
To: <time-nuts at febo.com>; <bruce.griffiths at xtra.co.nz>
Sent: Saturday, January 27, 2007 11:35 AM
Subject: Re: [time-nuts] Austron PRR-10 GPS discliplined Rb...


> Hi!
>
> Those interested in micro-steppers might want to look at the Symmetricom
> AOG-110 manual. They have a local 5 MHz OCXO locked through a interesting
> gear with the incomming 5 MHz and a DDS to result in a 10 kHz comparision
> frequency for the phase detector in the loop. The gear acheives a 512000
> increase in gain (1024 from gear-works as such and 500 from the ratio of 5 
> MHz
> and 10 kHz). To acheive the 1E-19 stepsize it then takes the DDS a few 
> bits,
> but what is 56 bits among friends? Since we don't need to waste too much 
> on
> this, there is a 8 bit CPU processing it all in there and it uses a 56 bit
> fixed point format.
>
> I'd naturally love a few comments on that one.
>
> Cheers,
> Magnus
>
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