[time-nuts] crystal oscillators & TPLL
rbenward at verizon.net
Tue Jun 22 16:36:17 UTC 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.
----- 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.
> 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
> 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.
> " Brief Explanation
> Allan variance equation:
> 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.
> [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.
> 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
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