was stored in e2 at mfg
time based on gps receiver module. At some point, your unit must have not been
set or been set to incorrect value or had its gps receiver replaced. Is there
an antenna prop delay command available you can use?
Greg Dowd | Symmetricom®, Inc.
Staff Scientist
2300
, with a small PSU mod board, and I believe a firmware
upgrade included.
Unfortunately I don't have any info on file any more.
If Greg Dowd at Symmetricom is lurking on this site, maybe he could
point
you in the right direction.
Rob Kimberley
-Original Message-
From: time-nuts-boun...@febo.com
I think the Rb version went in a taller case? As for the reboot,
probably depends on where you are probing :-)
My proto unit from 1996 is still happily ticking along on my bench in
the lab with an MTI oven that still has tuning range.
-Original Message-
From: time-nuts-boun...@febo.com
.
Rob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Greg Dowd
Sent: 20 July 2010 6:20 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Datum TS-2100 Rubidium
I think the Rb version went in a taller
Have you tried Symmetricom tech support? Truetime is now part of Symm's
Timing, Test and Measurement division.
Greg Dowd
gdowd at symmetricom dot com (antispam format)
Symmetricom, Inc.
www.symmetricom.com
Everything should be made as simple as possible, but no simpler Albert
Einstein
In NTPv4, the warning is propagated as soon as it is available. If it
were more than 6 months in advance, this could be an issue but that
hasn't happened yet. NTP also ignores the alternate (Mar/Sept) leap
windows by design.
Greg Dowd
gdowd at symmetricom dot com (antispam format
an upgrade kit (which cost $1k). The days of
schematics in the back of the manual were over long before the merger.
Greg Dowd
gdowd at symmetricom dot com (antispam format)
Symmetricom, Inc.
www.symmetricom.com
Everything should be made as simple as possible, but no simpler Albert
Einstein
-Original
working group will likely release a few as well. Note
that time and daytime are really, really old now.
Greg Dowd
gdowd at symmetricom dot com (antispam format)
Symmetricom, Inc.
www.symmetricom.com
Everything should be made as simple as possible, but no simpler Albert
Einstein
-Original Message
This is about the most I've found.
http://tf.nist.gov/timefreq/general/pdf/2125.pdf
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Gretchen Baxter
Sent: Monday, November 03, 2008 9:03 AM
To: Discussion of precise time and frequency measurement
Subject:
I think you would have a decent chance of getting any 240 to work. While we
did have our own configuration, I think it was just to allow full range tuning
across the subset of tuning voltages we could reach with our dac, which is
really reaching, but maybe .5 to 4.5V.
As long as the 240
Yup, you're in good shape. These are pretty straightforward devices.
What firmware version do you have? Ver command.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Mark Kahrs
Sent: Thursday, October 29, 2009 12:25 PM
To: Discussion
Yup, according to the factory, that's the latest update.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mark Kahrs
Sent: Friday, October 30, 2009 9:53 AM
To: Christopher Hoover
Cc: time-nuts@febo.com
Subject: Re: [time-nuts] Datum
The challenge with public grandmasters is that the delay variation introduced
by the intervening network destroys the time accuracy.
Greg Dowd
gdowd at symmetricom dot com (antispam format)
Symmetricom, Inc.
www.symmetricom.com
A clever person solves a problem. A wise person avoids it. Albert
My guess is that the error is real and coming from the TS2100. The
TS2100 was (is) a SNTP server running a RTOS but the timestamps are done
at the application layer. If you look at the output 1pps of the TS2100,
my guess is that it will probably agree with your other devices within a
few
Since I either owned or created all the Bancomm/Datum ntp designs after
I joined bancomm in 1992, I can promise you that I still have at least
one version of the source code :-) Actually I think I even have the
source for the bc635/700LAN product, created by Joe Fontes. The problem
is generally
Rob, you wound me :-) Actually, the Meinberg unit is a great box. The
commercial devices pretty much all fit the need that you describe. One
caution I would make about them is the note about the environmentals.
From experience I can tell you that a HV is a very harsh environment for
shock and
I think a couple of those bits do correspond to the oscillator type installed
but I think you can ignore them. If I remember right, those oscillator bits
were only used to calculate the dispersion update for ntp packets when
flywheeling through a loss of signal. As far as I recall, you just
The offset command in the TS2100 is just a phase stepper in 100ns steps. Usage
was originally targeted at compensating for the GPS antenna cable length
(~ns/ft). As it turned out, we used it for another purpose as well. The very
first models of the 2100 used an external GPS receiver (Trimble
show up as a
skew on the PPS output.
-Bob
On Mar 31, 2011, at 11:44 AM, Greg Dowd gd...@symmetricom.com wrote:
The offset command in the TS2100 is just a phase stepper in 100ns steps.
Usage was originally targeted at compensating for the GPS antenna cable
length (~ns/ft). As it turned out
Well the units are 100ns each so if you set offset to 3, it should shift the
1pps output by 300ns. Another point is that there is significant asymmetry in
the ntp packet processing if you are looking at accuracy. For the 1996 time of
day requirement of 100ms, it was moot. If you set the box
. At least according to my guide.
Greg Dowd
gdowd at symmetricom dot com (antispam format)
Symmetricom, Inc.
www.symmetricom.com
Everything should be made as simple as possible, but no simpler Albert
Einstein
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf
that I created a
few years ago was actually a headless 1U x86 computer with a bc637PCI and a
modem plugged into it, running linux and ntp with refclock drivers along with a
web server for control.
I'll look for the xp stuff.
Greg Dowd
gdowd at symmetricom dot com (antispam format)
Symmetricom
We have a smart antenna where the receiver is in the antenna housing and the
link to the timing receiver is digital over coax. On that, we can run a
variant of DTI (DocSis Timing Interface) which calibrates the cable delay
automagically. Not sure what the original question was but yes, it's
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