[time-nuts] Tight PLL Tester

WarrenS warrensjmail-one at yahoo.com
Thu Feb 11 22:51:58 UTC 2010

Thanks to the persistence and comments of others,
I have marked up an old  NBS diagram to show, anyone that wants to learn, 
how the Tight Phase lock method works to do its 'Magic'.
Although it can be very simple and cheap to build, It does take a certain 
amount of low noise design skill to be able to throw a bunch of parts bin 
things together and make it work as well as it is capable of.
I do believe this information is enough for a well qualified person to 
duplicate or even better my results.
I'm happy to try and answer any specific questions.

also see word discription from:
 Page 170 of 'NBS special publication 140' at:
http://digicoll.manoa.hawaii.edu/techreports/PDF/NBS140.pdf    81 meg, 473+ 
pages  (Takes a while to download)

For another block diagram and short description also see Figure 1.7 at:

Have Fun

****** edited **********
> Tom
> Things will turn out much better to do it the other way around.
> When I find out who is going to build/test it,
> I'll  make something specific for them that will allow them to be able to 
> use there own parts and tool box.
> ws
> **************
> ----- Original Message ----- 
> From: "Tom Van Baak" <tvb at LeapSecond.com>
>>> If there are any Nuts out there interested in helping to make available 
>>> to other Freq-Nuts a SIMPLE tester that I have found to be a VERY useful 
>>> low cost tool,
>> Warren,
>> Yes, I think it's a good idea for a couple of people to try to
>> duplicate your results; either to validate the resolution and
>> features that you're claiming, or to locate or quantify the
>> limitations in your implementation. Either way it will be a
>> learning experience for you, and for the group.
>> To that end, would you be able this week to write a quick
>> word document or readme or web page with photo(s) of
>> your setup, schematic, parts list, specific make/model of
>> the equipment that you're using, etc. Since you say it is
>> a simple setup, I suspect a number of us would then be
>> able to dig in our parts bin and mimic your prototype
>> as close as possible and then objectively measure how
>> it works compared to other phase noise measurement
>> systems.
>> /tvb
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