[time-nuts] Advantages & Disadvantages of the TPLL Method

Tom Van Baak tvb at LeapSecond.com
Sun Jun 13 06:34:53 UTC 2010

Here are a couple of really good articles that describe many
methods of phase/frequency measurement, including TPLL.
You'll see some nice "advantage/disadvantage" lists in several
of these documents, which is why I'm posting the links.

Warren & Bruce, please look at the first five documents at least.
John too. Lots of TPLL info. This is all worth reading. I don't
know why I didn't find some of these papers six months ago.

System Phase Noise Calculation and Measurement Techniques
-- short article, nice summary.

PN9000 Automated Phase Noise Measurement System Application Note #1
-- see section 2; TPLL is section 2.2.

Oscillator Phase Noise Measurements using the Phase Lock Method
-- TPLL, equations, graphs, error analysis, photos, schematics, parts list.

An investigation into the phase noise of quartz crystal oscillators
-- see chapter 4 or at least section 4.3; TPLL is

PN9000 Automated Phase Noise Measurement System Application Note #2
-- theory of operation, TPLL

A General Theory of Phase Noise in Electrical Oscillators
-- too deep for me.

Phase Noise Measurement. Using the Phase Lock Technique
-- might be applicable.

Correlation-based phase noise measurements
-- for John Miles

Practical Problems Involving Phase Noise Measurements
--  also for John.


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