[time-nuts] Riley paper on Tight Phase Lock Loop

Adrian rfnuts at arcor.de
Wed Jan 30 14:49:22 EST 2013


Hi Tom,

Bill has actually published detailed schematics etc here:
http://www.stable32.com/A%2010%20MHz%20OCVCXO%20and%20PLL%20Module.pdf

Btw. what do you think about his small DMTD system?
http://www.wriley.com/A%20Small%20DMTD%20System.pdf

Adrian


Tom Van Baak schrieb:
> Hi Bob,
>
> The TPLL method is described by NIST: http://tf.nist.gov/phase/Properties/one.htm
>
> A few years ago it was re-developed by WarrenS, a dedicated and frequent contributor to this list.
>
> See also John Miles excellent report: http://www.ke5fx.com/tpll.htm
> Or if that's dead, see http://web.archive.org/web/*/http://www.ke5fx.com/tpll.htm
>
> It's nice that W.J. Riley also tried it. If you know Bill, he makes us all look like amateurs.
>
> We know cases where TPLL works quite well; there are other cases where it doesn't. It would be nice if either Warren or John or Bill or anyone else posted a real schematic and BOM so that others could reliably duplicate, corroborate, refute, or refine their results. For some reason, it's like a big mystery; very unlike what we try to foster here on time-nuts: the free sharing of information, methods, experience, designs, results, and conclusions.
>
> /tvb
>
> ----- Original Message -----
> From: "Robert Darby" <bobdarby at triad.rr.com>
> To: <time-nuts at febo.com>
> Sent: Wednesday, January 30, 2013 10:32 AM
> Subject: [time-nuts] Riley paper on Tight Phase Lock Loop
>
>
>> Gentlemen,
>>
>> I've been a lurker on this list since early in 2012.  I do not possess a
>> technical background but do have some interest in time measurement topics.
>>
>> I was reading some of W. J. Riley's papers and saw that after the long
>> and contentious discussion on this list Mr Riley built and tested a
>> tight phase lock loop system.
>>
>> I have failed to turn up any mention of his paper on this list and was
>> curious if anyone has read it or perhaps duplicated it?
>>
>> He writes "HP 10811 ovenized  crystal oscillators are used as both the
>> locked oscillator and PLL reference, and the system thus measures the
>> combined instability of two presumed identical and uncorrelated
>> devices." He further notes that "These results agree well with other
>> measurements  for  this type of crystal oscillator."
>>
>> The paper is found at:
>>
>> http://www.stable32.com/Frequency%20Stability%20Measurements%20Using%20a%20Tight%20Phase%20Lock%20Loop.pdf
>>
>> The construction is described in greater detail in a separate paper:
>>
>> http://www.stable32.com/A%2010%20MHz%20OCVCXO%20and%20PLL%20Module.pdf
>>
>> The OCVCXO and PLL Board described therein appears to be a very
>> versatile piece of gear for anyone using 10811's.   Riley gives an
>> example using the module to clean-up the output of a LPRO-101 rubidium
>> (page 9).
>>
>>
>> Regards,
>> Bob Darby
>>
>
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