Magnus wrote:
"It's sad that they have not described the control algorithm in greater
detail."
I have to ask WHY??
The paper is So low tech, It is hardly worth reading, let alone wondering
how it is done, IF the goal is to learn something a bit advanced.
Maybe I'm just missing the satire here.
I see nothing there that is anything more than a beginner's first project.
The paper is disciplining a RB Osc using a very poor GPSDO and an overkill
high end counter.
~ by averaging the Phase difference over "n" time, use that to change the
freq of a RB using a 16 bit dac giving about 1e-14 frequency steps.
This is not a paper about "Don't GPSD your RB", as the nut subject line
suggest.
It seems a better subject line would of been "DON'T discipline your RB with
a GPS THIS WAY!"
Seems like a pretty lame way of doing it to me.
ws
**********************
----- Original Message -----
From: "Magnus Danielson" <mag...@rubidium.dyndns.org>
To: <time-nuts@febo.com>
Sent: Saturday, May 05, 2012 3:33 AM
Subject: Re: [time-nuts] Interesting paper: Don't GPSD' your Rb...
On 05/03/2012 11:29 PM, Poul-Henning Kamp wrote:
This is pretty think, but interesting:
http://tf.nist.gov/sim/Papers/Trigo_CPEM_2010.pdf
I interpret this as a GPS slaving of the rubidium.
Given that there is fairly high stability in both sources, the comparison
rate does not have to be stellar.
It's sad that they have not described the control algorithm in greater
detail.
Cheers,
Magnus
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
