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
Warren,
On 06/13/2010 05:45 AM, WarrenS wrote:
Thanks for the positive contrbution, A good example of one of the TPLL's
obvious disadvantages.
The simple cheap analog version of the TPLL is limited by it's need to
have a dedicated Ref OSC.
One way I have got around that problem, which would
Correlation-based phase noise measurements
http://www.femto-st.fr/~rubiola/pdf-others/correl-report.pdf
-- for John Miles
Practical Problems Involving Phase Noise Measurements
http://tycho.usno.navy.mil/ptti/ptti2001/paper42.pdf
-- also for John.
I've got these in my collection, but it
John,
On 06/13/2010 10:00 AM, John Miles wrote:
Correlation-based phase noise measurements
http://www.femto-st.fr/~rubiola/pdf-others/correl-report.pdf
-- for John Miles
Practical Problems Involving Phase Noise Measurements
http://tycho.usno.navy.mil/ptti/ptti2001/paper42.pdf
-- also for
Tom,
I took the liberty of converting your post into an entry in my Time-Nuts
Wiki:
http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:phase_frequency_m
easurement_methods
Please note anyone can edit this Wiki or create new pages.
Didier
-Original Message-
From:
Didier
On 13 June 2010 21:51, Didier Juges did...@cox.net wrote:
Tom,
I took the liberty of converting your post into an entry in my Time-Nuts
Wiki:
http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:phase_frequency_m
easurement_methods
Just to let you know that your link got
I saw that. There is nothing I can do about it other than by using a url
shortener which I am reluctant to do because of the obfuscation and
potential for abuse.
I assume that by now everyone knows how to deal with these problems, and if
someone does not, now is a good time to brush up...
Didier
Just to let you know that your link got busted by a line-wrap
somewhere so it is not clickable and has to be cut and pasted
into place.
I saw that. There is nothing I can do about it other than by using a url
shortener which I am reluctant to do because of the obfuscation and
potential
Adrian
I have also a FTS 1200 that is 2 Hz off at 5 MHz and can not be tuned to
5 MHz, have not dug into it yet. But first I would check the tuning range of
your OCXO depending as to which one it is the tuning voltage should go
past 5 Volt.
If you see peaks on the current with the Osc.
On 13/06/2010, Didier Juges did...@cox.net wrote:
I saw that. There is nothing I can do about it other than by using a url
shortener
You can hint to most email clients that you'd like lines unbroken,
using angle brackets
This may work...
This is a test...
http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:phase_frequency_m
easurement_methods
http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:phase_frequency_
measurement_methods
Didier
___
time-nuts mailing list --
Steve,
This seems to work with your email client sending and Outlook here receiving
(I received that link unbroken), but the same link I just sent was broken,
so it seems Outlook is doing that on the way out, but not on the way in...
I should have known, Microsoft...
Bottom line, no sure way to
Testing, testing, testing...
I made a registry change which should prevent Outlook from breaking the line on
transmit...
Didier
-Original Message-
From: Didier Juges [mailto:did...@cox.net]
Sent: Sunday, June 13, 2010 10:08 AM
To: 'Discussion of precise time and frequency measurement'
That now works here. For those using Outlook, here is the fix:
http://support.microsoft.com/default.aspx?scid=kb;en-us;823921Product=out2003
Didier
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Didier Juges
Sent: Sunday, June 13,
I thought the fix was to use Thunderbird?
-Chuck Harris
Didier Juges wrote:
That now works here. For those using Outlook, here is the fix:
http://support.microsoft.com/default.aspx?scid=kb;en-us;823921Product=out2003
Didier
___
time-nuts
I was using Thunderbird for a while, and the main advantages, from a practical
standpoint, were the full access to the message headers, better control on
formatting and better spam filtering, but since I have been using a
Blackberry, I have appreciated the excellent integration of Outlook and
Magnus Posted
The TPLL is a mid-tau stability test, since it's sweet-spot is in the
0,1 - 1000 s range. Short-term is better handled in LPLL phase-noise
measurements.
Mostly agree, it is a mid-tau device, but also consider:
The simple TPLL can be used to find the 1ms to 10 ms ADEV as good
I went quickly thru Tom's reference list and was unable to fine anything
that had much if anything to do directly with the NIST, the NBS, or the
slightly modified ws TPLL method.
All of those papers seem to be about how to measure Phase noise, NOT
frequency stability, and from what I was able
Warren, someone asked if you could draw up a schematic that is exactly what
you're using, and post it here for us. If you did that, I missed it (I don't
always get the time-nuts posts -- Hughesnet thinks a lot of them are spam). Or
is this a work in progress for you, that we can expect soon?
John,
yep!
The OCXO out of the 4060 and connected to a bench power supply with no
tuning voltages applied had to be trimmed to get on 10 MHz.
After a while it started temporarily jumping to -1.4E-07, which could be
reversed or provoked by knocking it on the head.
I decided to disassemble it
My Z3801A has been going into holdover randomly for at least a month.
Sometimes it doesn't happen for many days and other times two days in
a row. The time in holdover is anywhere from under 1/2 hour to several
hours. Last night, it went into holdover again and has been that way
for over 20 hours.
Interesting. Solder and gold don't like each other very much, and even the
more respected manufacturers don't always seem to appreciate that, when they
rely on a soldered connection to provide some mechanical stability. This
isn't the first time I've heard of FTS oscillators behaving oddly, so
Adrian, maybe I missed something which oscillator does your unit have? Bert
-Original Message-
From: Adrian rfn...@arcor.de
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Sun, Jun 13, 2010 6:08 pm
Subject: Re: [time-nuts] Odd FTS 4060 Behavior
To All,
An update to my Z3801A saga.
Summary: As you know, I purchased this Z3801A at the Dayton Hamfest. The
person who sold it to me said it was modified for RS-232. I powered the
unit up and the only thing it ever did was go into the holdover mode. Tried
hooking RS-232, but got no
Still to go: The RS-232 signals look fine going into the cable,
+/-5V, any
ideas why the computer won't read it? Am I missing something? I
tried two
different ports in case I screwed one up one of the ports, but no luck.
Haven't been following the thread so someone may have suggested
Bert,
it has a 1000B with one ea. 5 and 10 MHz outputs. Internally, as by the
X-tal, it is a 5 MHz unit.
It's now running fine since 2 1/2 hours. Compared with my 5065A the 4060
is just some 2E-12 off or, more likely, the Rb is.
It went a little yada when I flipped it over to mount the bottom
If you remove those zero ohm resistors, you need other jumpers
to make it work as an RS-232.
When I did mine, I stuck in two strips of headers and used those
HD jumpers to select RS-232 or RS-422.
Check out this site:
http://www.ad6a.com/Z3801A.html
73, Dick, W1KSZ
-Original
Just got mine running again that was stashed away for some time.
I've had communication problems, too, when I was trying different power
supplies for the 422/232 converter.
Rebooting the PC finally fixed that...
I'm using SatStat with Com port settings as follows:
Baud Rate 19200
Data Bits 7
One time did 0.8 , 1.0 and 1.2 at 100 seconds and did not see much change.
Its in the works one day to play with it some more, when I have more
TIME
Brian
Peter Vince wrote:
Have you played with the damping factor Brian?
Peter
___
The headers are in, that's why I though he completed the modification.
Bob
AC2AZ
- Original Message -
From: Richard W. Solomon w1...@earthlink.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Sunday, June 13, 2010 8:43 PM
Subject: Re: [time-nuts]
Warren,
Penny dropped!
On 14 June 2010 05:29, WarrenS warrensjmail-...@yahoo.com wrote:
Magnus Posted
The TPLL is a mid-tau stability test, since it's sweet-spot is in the
0,1 - 1000 s range. Short-term is better handled in LPLL phase-noise
measurements.
Mostly agree, it is a mid-tau
The minimum voltage is +/-3 volts, I'm getting about +/-6 right now.
How does one change the serial port speed, I don't see anything in SatStat.
Bob
- Original Message -
From: John Miles jmi...@pop.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent:
On 14 June 2010 10:46, Magnus Danielson mag...@rubidium.dyndns.org wrote:
Still puts it in the mid-tau range as a method. The useful range and
precision of a particular implementation of the method will vary.
By putting a GPSDO in the usual place of the DUT and putting the 10811
in place of
Corby,
It has been a long and frustrating day.
I swapped the A3, A8, A7, A14, and A1 assemblies with a functioning unit and
the assemblies from the 'problem child' worked in the 'good' unit and the
assemblies from the 'good' unit failed to work in the 'problem child'. I
'un-swapped the units
This is known as gold embrittlement.
The gold has to be removed before a good solder connection is made.
To remove the gold, tin the gold plated area.
Desolder the tinning.
Retin and remove the solder three times.
This should remove the gold which forms an amalgam with the solder.
After the gold
I do not know why the manufacturers insist on gold plating leads that are
designed to be soldered. Silver plating seems like a better solution.
Gold doesn't tarnish so you can get a good solder joint after it's been
sitting around for a while.
There are enough hassles with lead that
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