[time-nuts] FE-5680A arrived

Bob Camp lists at rtty.us
Fri Jan 13 12:24:53 EST 2012


If you believe that your GPS is good to < 1x10^-11 *and* that's good enough
for what you are doing - the answer is easy. If you need 10X better than
that, indeed it gets harder, but still in range for a TBolt. If you need
100X better, then it's very difficult. 


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Hal Murray
Sent: Thursday, January 12, 2012 8:48 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FE-5680A arrived

lists at rtty.us said:
> You would have to have either a *very* long loop (weeks?) and/or a *very*
> good GPS (big bucks) to keep from messing your Rb up.

> The alternative would be to simply do a comparison every two months and
> adjust it manually by the one or at most two DDS steps required. 

Yes, but how long do I "measure" when the two month timer goes off.  Suppose

I measure for a day.  How do I know if I got a good day or was unlucky?  
Might as well collect everything and then analyze the whole pile.

These are my opinions, not necessarily my employer's.  I hate spam.

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