[time-nuts] LPRO-101 with Brooks Shera's GPS locking circuit

[Ulrich Bangert]

Poul,

i appreciate your comments always a lot! But dynamical methods are
especially usefull when the input parameters are subject of change,
aren't they? I have seen algorithms that use a a-priori knowledge of the
LO's ADEV properties to estimate the GPS's jitter and to adjust the loop
time constant according to that. Ok, if you are referring to something
like that. But how would you solve the system of equations with TWO
unknowns (LO and GPS jitter) if you have only ONE information?

Best regards
Ulrich Bangert, DF6JB

> -----Ursprüngliche Nachricht-----
> Von: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von Poul-Henning Kamp
> Gesendet: Samstag, 16. Dezember 2006 15:32
> An: Discussion of precise time and frequency measurement
> Betreff: Re: [time-nuts] LPRO-101 with Brooks Shera's GPS 
> locking circuit
> 
> 
> In message <000001c7211b$d4766130$0202fea9 at athlon>, "Ulrich 
> Bangert" writes:
> 
> >ONE SIMPLE RULE applies to this question despite the fact that some 
> >math for drawing tau-sigma-diagrams is indispensable.
> 
> Ulrich,
> 
> The real challenge is to build an algorithm which finds this 
> point dynamically.
> 
> -- 
> 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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