On 10/26/2012 08:26 PM, Peter Gottlieb wrote:
I've used the HP 3586 for measuring AM carrier frequencies as well as
my Tek 495P (both referenced to Rb) for higher frequencies such as air
band.
Some carriers are dead nuts on while others are quite far off (at
least to my mind) although I've
Dear Edgardo,
On 10/25/2012 02:04 AM, Edgardo Molina wrote:
Dear Mangus,
I will allow myself to share a comment on your thread.
Timing on windows servers is not one of their plausible strengths.
This comes as no surprise, but I wanted some hard fact to assist in
raising the awareness.
David,
On 10/25/2012 07:03 AM, David J Taylor wrote:
Magnus,
If it helps, I have my own measurements of the Meinberg NTP port and
later versions running on Windows here:
http://www.satsignal.eu/mrtg/performance_ntp.php
Strategy:
1 - have one FreeBSD (not Linux) server, although this is now
Dear Jacques,
On 10/25/2012 11:17 AM, Jacques Tiete wrote:
Hello Magnus,
I know what you're talking about, I'm working for a company specialized in
broadcasting (from studio's to stations to satellites...) and in this
world correct
timing is paramount, we live by the 1/25 second rythm and even
On 10/25/2012 01:17 PM, Bob Camp wrote:
Hi
Judah Levine (probably spelled his name wrong) from NIST has a series of papers
on this. They go back into the 90's.
For once you got his name right :)
I will go back to his papers (NIST has 106 papers with his name on it)
as there is surely a lot
Sarah,
On 10/25/2012 06:44 PM, Sarah White wrote:
1)
Thanks magnus. This is something I'm quite interested in:
I'm not the only one doing testing for Microsoft NT 5.x and higher
against NTP-type synchronization. It's actually high enough quality such
that a Windows server running NTP with a
There are two ways to measure the carrier frequency using a Spectrum analyzer.
1) have bandwidth sufficient to capture all the sidebands produced
by the FM signal.
2) Have your bandwidth set very narrow, 10Hz or so and tune it directly
on the carrier frequency. The carrier frequency should
David,
[]
Lovely! I'm impressed.
What's the reasons for the offsets? Can't your tool handle negative values?
It would be good to have min, max, max-min, avg, std.dev values without
offsets to help illustrate worst-case behaviour as well as average
performance and noise energy. The more advanced
Does anyone have a copy of the 5061B ops manual that does not have pages
3-7 and 3-8 missing? The copy at the Agilent site doesn't have those,
and they are the basic start-up instructions.
I am guessing that the steps are not much different than those in the
5061A manual (which I have), but
John,
I have an original manual with the pages of interest. Would you like me to
scan and send?
Had
K7MLR
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of John Ackermann N8UR
Sent: Saturday, October 27, 2012 09:06
To: Discussion of
That would be wonderful, Had.
Thanks so much!
John
Had said the following on 10/27/2012 12:09 PM:
John,
I have an original manual with the pages of interest. Would you like me to
scan and send?
Had
K7MLR
-Original Message-
From: time-nuts-boun...@febo.com
Hello to the group.
I see the thread took a left turn a day or so ago so thought I would fire
up a new one for the interested in the phillips saa6579 RDS chip.
Several others have purchased this chip. Jameco electronics had them for 10
or 20 cents. I picked up 10. You had order that many as I
Dear Magnus,
I do not have a reference for the performance of Windows as NTP server. This
has been a busy week and long working nights. It is a logical workload after
being absent for nearly two weeks : )
I will browse the web and NIST to find some solid references to this issue. I
am still
Dear Edgardo,
On 10/27/2012 07:41 PM, Edgardo Molina wrote:
Dear Magnus,
I do not have a reference for the performance of Windows as NTP server.
This has been a busy week and long working nights. It is a logical
workload after being absent for nearly two weeks : )
I will browse the web and
Hi
If you are running a non-RTOS, one test parameter should be a significant
variation in the workload on the server.
Bob
On Oct 27, 2012, at 2:34 PM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
Dear Edgardo,
On 10/27/2012 07:41 PM, Edgardo Molina wrote:
Dear Magnus,
I do not
On 10/27/2012 9:47 AM, Magnus Danielson wrote:
Dear Edgardo,
On 10/25/2012 02:04 AM, Edgardo Molina wrote:
Dear Mangus,
I will allow myself to share a comment on your thread.
Timing on windows servers is not one of their plausible strengths.
This comes as no surprise, but I wanted some
Since I recently got an HP Cs degausser (thanks, Stijn!), I though I'd
go through the whole setup routine for my 5061B/004 and see how close
the C-field-via-Zeeman setting would bring me to GPS-derived frequency.
It turned out to be an interesting and puzzling exercise.
This 5061 seems to be
On 10/27/2012 09:06 PM, Sarah White wrote:
Sorry to post such a long thing on the subject. Most of the work I do
with accurate time involves network synchronization.
Really, the NTP / SNTP protocol isn't nearly as high performance as
Precision time protocol --- PTP is the latest technology to
John
Going from what you have here and the information below it would seem to me
that there is some form of residual magnetism effecting the tube. I don't
believe the waveform of the signal has a huge effect as long as its not a
square wave. I think it can have distortion.
Its been a while but
Hi
Not to mention the issues with hardware time stamping over large scale / multi
vendor networks. As soon as you cross your property line, things start to get
messy….
Bob
On Oct 27, 2012, at 4:37 PM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
On 10/27/2012 09:06 PM, Sarah White
Hi John,
Don't know if I address your real issues, but I want to add some more
pieces to the puzzle.
On 10/27/2012 09:16 PM, John Ackermann N8UR wrote:
Since I recently got an HP Cs degausser (thanks, Stijn!), I though I'd
go through the whole setup routine for my 5061B/004 and see how close
Two things come to mind:
1) is this the high performance tube? Perhaps it has a different
Zeeman frequency than the standard tube?
2) a non HP replacement tube? FTS Cs beam tubes are way different
Zeeman frequencies than HP.
-Chuck Harris
John Ackermann N8UR wrote:
Since I recently
John,
Did you do the Zeeman frequency adjustment before doing the 'degauss'? In
other words, did you 'magnetize' rather than 'de-magnetize'?
Have you checked the A15 board to make sure it has the correct resistor and
current? I have a 5061B Service Manual if you need some sections or
On 10/28/2012 01:13 AM, Chuck Harris wrote:
Two things come to mind:
1) is this the high performance tube? Perhaps it has a different
Zeeman frequency than the standard tube?
2) a non HP replacement tube? FTS Cs beam tubes are way different
Zeeman frequencies than HP.
A high performance tube
Is there perhaps a hemisphere jumper for the sign of nulling fields?
-John
==
On 10/28/2012 01:13 AM, Chuck Harris wrote:
Two things come to mind:
1) is this the high performance tube? Perhaps it has a different
Zeeman frequency than the standard tube?
2) a non HP replacement
John,
yes, I have a scan. It's the one from the Agilent site.
There are just some pages mixed up. Nothing appears to be missing.
The pages are in this sequence: 3-5, 3-6, 3-9, 3-10, 3-7, 3-8, 3-11,
3-12 etc.
Adrian
John Ackermann N8UR schrieb:
Does anyone have a copy of the 5061B ops manual
Magnus Danielson wrote:
On 10/28/2012 01:13 AM, Chuck Harris wrote:
Two things come to mind:
1) is this the high performance tube? Perhaps it has a different
Zeeman frequency than the standard tube?
2) a non HP replacement tube? FTS Cs beam tubes are way different
Zeeman frequencies than HP.
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