I was looking through my files and found a 1965 NASA publication that
contains the papers presented at a 1964 IEEE-NASA symposium on the
short-term stability of oscillators. It's a wonderful collection of
seminal papers by most of the usual suspects of the era (see attached
table of contents).
I posted it to Didier's site. It's still in quarantine, but will be
searchable when Didier moves it into the general population (which could
take several weeks). The file name is:
"Short-Term Frequency Stability IEEE-NASA symposium NASA SP-80 1965"
Best regards,
Charles
That NASA SP-80 is a classic!
Your upload looks like the 17.5 MB version at:
https://archive.org/details/nasa_techdoc_19660001092
There's also a (cleaner?) 9.7 MB copy here:
http://www.ieee-uffc.org/main/history/short-term_f_stab.pdf
which is part of the excellent collection of historical documents:
http://www.ieee-uffc.org/main/history.asp
Warning - that uffc history site is a real time sink!
/tvb
----- Original Message -----
From: "Charles Steinmetz" csteinmetz@yandex.com
To: time-nuts@febo.com
Sent: Sunday, July 31, 2016 3:40 AM
Subject: [time-nuts] Short-term frequency stability symposium 1964
I was looking through my files and found a 1965 NASA publication that
contains the papers presented at a 1964 IEEE-NASA symposium on the
short-term stability of oscillators. It's a wonderful collection of
seminal papers by most of the usual suspects of the era (see attached
table of contents).
I posted it to Didier's site. It's still in quarantine, but will be
searchable when Didier moves it into the general population (which could
take several weeks). The file name is:
"Short-Term Frequency Stability IEEE-NASA symposium NASA SP-80 1965"
Best regards,
Charles
On 7/31/16 3:40 AM, Charles Steinmetz wrote:
I was looking through my files and found a 1965 NASA publication that
contains the papers presented at a 1964 IEEE-NASA symposium on the
short-term stability of oscillators. It's a wonderful collection of
seminal papers by most of the usual suspects of the era (see attached
table of contents).
I posted it to Didier's site. It's still in quarantine, but will be
searchable when Didier moves it into the general population (which could
take several weeks). The file name is:
"Short-Term Frequency Stability IEEE-NASA symposium NASA SP-80 1965"
Good to have it on Didier's site..
For now, it seems to be available at
http://www.ieee-uffc.org/main/history/short-term_f_stab.pdf
However, IEEE could decide at any time to put it behind a paywall.
In theory, you could find it at some NASA NTRS server, but not
everything is there, and those servers come and go as people freak out
more or less about export controls, etc.
I also posted six files pertaining to Diophantine frequency synthesis on
Didier's site. Four are papers dating to 2006-2007 by Sotiriadis, one
is a paper of the same era by Stork, and one is a patent granted to
Wilke in 1993.
These are also still in quarantine, but will be searchable when Didier
moves them into the general population (which could take several weeks).
"Diophantine" will be a good search term.
Best regards,
Charles
Finally for today, I posted two white papers from PTF, Inc. that discuss
the basics of GPSDO design. These are the best accessible discussions
of "how it's done" at the professional level that I'm aware of, and
(IMO) should be required reading for anyone attempting a DIY GPSDO design.
Note that some of the ADEV graphs show the use of local oscillators that
are less stable at short tau than most time-nuts would use, so the
corresponding crossover frequencies are lower (PLL bandwidths are
higher) than would be appropriate for a time-nuts grade GPSDO by a
factor of ~10.
The file names are:
Basics_of_GPS_discipline_PTF_AN_APP-29
Optimizing_stability_in_GPSDO_design_PTF
(Didier's system will convert the underscore characters to spaces for
indexing.)
Once again, these are still in quarantine, but will be searchable when
Didier moves them into the general population (which could take several
weeks).
When that happens, "PTF" will be a good search term.
Best regards,
Charles
I am pleased to report that Didier has moved this document to the
general population on ko4bb.com. It can be accessed by going to the
"Manuals" page http://www.ko4bb.com/getsimple/index.php?id=manuals and
searching by file name ("Short-Term Frequency Stability IEEE-NASA
symposium NASA SP-80 1965"), or by following the document-specific
download link:
Best regards,
Charles
I was looking through my files and found a 1965 NASA publication that
contains the papers presented at a 1964 IEEE-NASA symposium on the
short-term stability of oscillators. It's a wonderful collection of
seminal papers by most of the usual suspects of the era (see attached
table of contents).
I posted it to Didier's site. It's still in quarantine, but will be
searchable when Didier moves it into the general population (which could
take several weeks). The file name is:
"Short-Term Frequency Stability IEEE-NASA symposium NASA SP-80 1965"
Best regards,
Charles
I am pleased to report that Didier has moved these document to the
general population on ko4bb.com. They can be accessed by going to the
"Manuals" page http://www.ko4bb.com/getsimple/index.php?id=manuals and
searching for "diophantine", or by following the document-specific
download links:
Best regards,
Charles
I also posted six files pertaining to Diophantine frequency synthesis on
Didier's site. Four are papers dating to 2006-2007 by Sotiriadis, one
is a paper of the same era by Stork, and one is a patent granted to
Wilke in 1993.
These are also still in quarantine, but will be searchable when Didier
moves them into the general population (which could take several weeks).
"Diophantine" will be a good search term.
Best regards,
Charles
I am pleased to report that Didier has moved these document to the
general population on ko4bb.com. They can be accessed by going to the
"Manuals" page http://www.ko4bb.com/getsimple/index.php?id=manuals and
searching for "PTF", or by following the document-specific download links:
Best regards,
Charles
Finally for today, I posted two white papers from PTF, Inc. that discuss
the basics of GPSDO design. These are the best accessible discussions
of "how it's done" at the professional level that I'm aware of, and
(IMO) should be required reading for anyone attempting a DIY GPSDO design.
Note that some of the ADEV graphs show the use of local oscillators that
are less stable at short tau than most time-nuts would use, so the
corresponding crossover frequencies are lower (PLL bandwidths are
higher) than would be appropriate for a time-nuts grade GPSDO by a
factor of ~10.
The file names are:
Basics_of_GPS_discipline_PTF_AN_APP-29
Optimizing_stability_in_GPSDO_design_PTF
(Didier's system will convert the underscore characters to spaces for
indexing.)
Once again, these are still in quarantine, but will be searchable when
Didier moves them into the general population (which could take several
weeks).
When that happens, "PTF" will be a good search term.
Best regards,
Charles
Wow, the last time I heard of this word was in the late 60's in a graduate course on number theory. I still remember the story of the monkey and the coconuts :). Admittedly I did not look at any of the posted links, but, have no idea how Diophantine equations can help frequency counters. Regards - Mike
Mike B. Feher, N4FS
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