[time-nuts] LPRO-101 with Brooks Shera's GPS locking circuit
Poul-Henning Kamp
phk at phk.freebsd.dk
Sat Dec 16 20:30:03 UTC 2006
In message <20061216202309.BA059BE00 at ip-64-139-1-69.sjc.megapath.net>, Hal Murray writes:
>
>> You still want to produce some form of quality measure for the ADEV
>> shape in order to form some form of control loop.
>
>Suppose I build I good GPSDO. How do I determine how good it is? (or even
>if it is any good)
Since you pretty much know that the ADEV of the GPS receiver is a straight
line, you can get quite a long way by doing an ADEV calculation over
your measured errors.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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