[time-nuts] crystal oscillators & TPLL

Robert Benward rbenward at verizon.net
Tue Jun 22 12:36:17 EDT 2010


So now we, those that want a little more than faith, are nuts.  Some day 
when you learn how to speak to people with respect, you too may get some 
respect of your own.

Never argue with a fool, onlookers may not know the difference.
Never wrestle with a pig, you will only get dirty, and the pig likes it.

Bob


----- Original Message ----- 
From: "WarrenS" <warrensjmail-one at yahoo.com>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Tuesday, June 22, 2010 11:20 AM
Subject: Re: [time-nuts] crystal oscillators & TPLL


> Thanks Don
>
> For all the nuts that want the analysis with math and fancy papers on how 
> (or why) the TPLL works.
> They will find the whole thing on one line on page 4-21 of that paper. 
> (page 110)
> That's about it and all that is needed, if one also understands how to do 
> integration by oversampling or by VtoF.
> http://www.am1.us/Papers/U11625%20VIG-TUTORIAL.PDF
>
>
> Another place to find the same thing is on ALLAN's site.
> Sorry neither have the long and unreadable fancy papers like some have 
> posted or wanted
> but
> Not a whole lot needs to be said about something so simple.
> That is really all there is to it, if one starts with Frequency 
> differences, like the TPLL, and not Phase, like most other methods, to get 
> the raw data to use with an ADEV program like "PLOTTER".
> Note there is no extra S/W processing OR H/W processing or secret anything 
> needed to be able to do that, because JUST THE BASIC TPLL Block does it 
> all already.
> http://www.allanstime.com/AllanVariance/
>
> Under
> " Brief Explanation
> Allan variance equation:
>
>
> BTW
> All those fancy, long and unreadable (by me)  papers, are mostly just 
> trying to get a good close approximation of the above because they start 
> with phase and not Freq.
> The TPLL does not need no approximate anything to get there, IT is already 
> there and gives that EXACT thing over the total Tau range, for ANY Osc 
> noise type and as far as I've seen the ONLY method that does.
> The TPLL method is limited by its OXCO controlled (reference) Oscillator 
> plus the noise of its two main parts, that can be made way below ANY OCXO 
> noise level.
>
> woops, sorry, I guess some wanted this to remain a "SECRET".
> So don't blame me this time, Don and ALLAN are the ones that posted it 
> and/or said it.
> If others want more, It is about time they did something beside complain 
> about me and what I know or did or did not do.
>
> ws
>
> *********************.
>
> [time-nuts] crystal oscillators
> Don Latham djl at montana.com
> Mon Jun 21 23:46:04 UTC 2010
>
>
> I just found this while noodling around. Looks very good, probably known
> to most of you.
> Don
> http://www.am1.us/Papers/U11625%20VIG-TUTORIAL.PDF
>
> may have to remove the %20?
>
> -- 
> "Neither the voice of authority nor the weight of reason and argument are
> as significant as experiment, for thence comes quiet to the mind."
> R. Bacon
>
>
> Dr. Don Latham AJ7LL
> Six Mile Systems LLP
> 17850 Six Mile Road
> POB 134
> Huson, MT, 59846
> VOX 406-626-4304
> www.lightningforensics.com
> www.sixmilesystems.com
>
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