[time-nuts] Frequency standards for characterizing GPSDO's ?

Mark Spencer mspencer12345 at yahoo.ca
Sun Jan 30 17:13:31 UTC 2011

Interesting thanks.   Getting a Rubidium standard that is progamable makes 

I've seen a number of references to the PICTIC II, are the circut boards still 
avaliable ?

Best regards
Mark Spencer

----- Original Message ----
From: Magnus Danielson <magnus at rubidium.dyndns.org>
To: time-nuts at febo.com
Sent: Sat, January 29, 2011 12:51:43 PM
Subject: Re: [time-nuts] Frequency standards for characterizing GPSDO's ?

On 29/01/11 20:53, Mark Spencer wrote:
> Greetings I'm looking suggestions for a frequency standard for characterizing
> GPSDO's.  I've got one 10811 (out of 3) that seems to be stable enough to be
> able to use as a frequency reference to draw conclusions about GPSDO 
> using a 5370B counter in time interval mode.  (It typically takes
> several thousand seconds for a phase wrap to occur.)  I'm contemplating
> acquiring a Rubidium standard as a next step and would be interested in any
> opinions as logical next steps.

Consider a PICTIC II and a FEI rubidium (or compatible from Temex). Toss a 
processor of choice to take the PICTIC II data, implement a PI-regulator and 
then steer the rubidium over the serial interface.

For best system design one would need four serial interfaces (GPS, rubidium, 
PICTIC II and supervision). Would be a rather neat solution.


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