On Sun, 16 Oct 2011, Miguel Gonçalves wrote:
On 16 October 2011 19:10, unruh un...@physics.ubc.ca wrote:
In comp.protocols.time.ntp, you wrote:
Hi!
Anyone here used a Trimble Resolution T with NTP?
From the pictures (all of the data sheets give a java error-- why in the
world they couldn't
OK, can now get the datasheets, and it apparently does have a serial port
The pulse is 3.3V so should be ok to run most serial port interrupts.
It gets nmea but the control of the nmea seems to be via their proprietary
language. So If you could switch the receiver into nmea befor it is grabbed
On Wed, 7 Sep 2011, Miguel Gonçalves wrote:
On 7 September 2011 05:07, unruh un...@physics.ubc.ca wrote:
I've tried Garmin 18 LVC and Sure. Not want to start a war here but for
the
specifications and price Oncore beats both. :-)
Beats them how? What measurements have you made of those two
On Wed, 7 Sep 2011, Chris Albertson wrote:
2011/9/7 Miguel Gonçalves m...@miguelgoncalves.com:
On 7 September 2011 05:07, unruh un...@physics.ubc.ca wrote:
I've tried Garmin 18 LVC and Sure. Not want to start a war here but for
the
specifications and price Oncore beats both. :-)
Beats
References: 4eea00b1-966a-4f39-a6cc-265ce959c...@s4g2000prh.googlegroups.com
slrni06c22.l1a.un...@wormhole.physics.ubc.ca uo3cd7-9231@ntp.tmsw.no
On 2010-05-31, Terje Mathisen terje.mathisen at tmsw.no wrote:
unruh wrote:
Note, that this is one of the reasons why your customers should
On Sun, 29 Nov 2009, Richard B. Gilbert wrote:
A much oversimplified explanation is that short poll intervals are used to
correct large errors quickly and long intervals are to correct small errors
very accurately.
That is true if you are refering to rate errors, it is not for offset
Harlan Stenn st...@ntp.org writes:
In article 968zl.19988$ph1.19...@edtnps82, Unruh
unruh-s...@physics.ubc.ca writes:
Unruh That may be the logic, but it is seriously flawed. It also indicates
Unruh that the decision to interpret PPS separately from the other drivers
Unruh is flawed. atom
On Thu, 29 Jan 2009, phil.new...@wendysarbys.com wrote:
- If you have NMEA output from the GPS in your ntp.conf file
(127.127.20.0), expect it to have reach 0 reported when you finally get
PPS (127.127.28.0) working. You can have NMEA or PPS from your serial
input, you just can't have both
shmpps is a program which uses the shm refclock driver.
It is referenced on time.qnan.org, and you can get the driver from there.
In ntp, you set ntp to use the shm refclock
Eg in my /etc/ntp.conf I have
server 127.127.28.0 minpoll 4 prefer
fudge 127.127.28.0 refid PPS flag3 1
This tells ntp to
On Sat, 3 Jan 2009, Danny Mayer wrote:
Unruh wrote:
George R. Kasica geor...@netwrx1.com writes:
On Fri, 02 Jan 2009 14:31:34 +0100, Rob van der Putten r...@sput.nl
wrote:
Hi there
Steve Kostecke wrote:
All my Linux systems had a fine time. None of them locked up / crashed /
rebooted
Unruh [EMAIL PROTECTED] writes:
[EMAIL PROTECTED] writes:
Hi all,
Since yesterday I saw the leap second Flag set on some servers of
ntp.pool.org. I'am quite surprise because the leap second add to be
set the 31/12/2008 and not the 1/12/2008.
Is it normal
The leap is announced at the
On Sat, 22 Nov 2008, Danny Mayer wrote:
Normally I would not respond to a 2 month old message but I need to
correct some things here that were written.
Unruh wrote:
connected via 1 Gbps switch. The network is lightly loaded and I
configured the clients as such
server ntp minpoll 4
The key seems to be the lines:
etemp = min(mu, (u_long)ULOGTOD(sys_poll));
dtemp = 4 * CLOCK_PLL * ULOGTOD(sys_poll);
plladj = fp_offset * etemp / (dtemp * dtemp);
Ie if we assume that the etemp is determined by the poll interval, we have
plladj=fp_offset
Harlan Stenn [EMAIL PROTECTED] writes:
Nick's SNTP code is about to be replaced with completely new code, written
by J. Max Kuehn as his GSoC project.
Ah. OK. And this program will do what? Is it supposed to be a fully fledged
sntp (ie, act as a client only ntp program, or a server only if there
Joseph Gwinn [EMAIL PROTECTED] writes:
In article [EMAIL PROTECTED],
[EMAIL PROTECTED] (Hal Murray) wrote:
I'm not a sysadmin, but am digging into service. I don't recall that
the service man page was that helpful, but will look again.
service is mostly a shortcut to save typing. If you
A question has arisen in another group-- What happens if, when ntp starts
up, the remoter server is unavailable ( eg no DNS or no connection)?
This is highly likely to be the case for a laptop for example, where the
connection with the local network is only brought up by the user after a
while, or
Uwe Klein [EMAIL PROTECTED] writes:
Serge Bets wrote:
Hello David,
On Tuesday, July 22, 2008 at 7:45:06 +0100, David Woolley wrote:
Serge Bets wrote:
Hwclock 2.33 sets the RTC with typically a maximum error of
10 microseconds
That would only be possible if the RTC's counter was updated
shy author [EMAIL PROTECTED] writes:
Has anyone thought about removing both the linear terms and quadratic
terms in the drift, by utilizing the temperature sensor readings
available on many of the latest motherboards?
Crystal oscillators tend to have both a linear bias and a quadratic bias,
On Sat, 31 May 2008, Asrai khn wrote:
Its mix of OS Linux, Unix (sun, freebsd) and yes we also have some hardware
of Lucent (MaxTNT) that running thers OS TAOS,
As i said we dont' have this DST before and its first time government is
implementing it (coz of sever power crises)
Which
On Fri, 30 May 2008, Kevin Oberman wrote:
From: Unruh [EMAIL PROTECTED]
Date: Fri, 30 May 2008 20:10:19 GMT
Sender: [EMAIL PROTECTED]
[EMAIL PROTECTED] (Asrai khn) writes:
Note: please reply to me direct as i am not subscribe to mailing list.
It is not a mailing list, it is a news
David L. Mills [EMAIL PROTECTED] writes:
Jan,
A timer interrupt is required each second to update the clock frequency
no matter what. In addition, a sweep is made through the associations to
I thought that the ntp daemon runs the per second routine only if the
kernel discipline is not
[EMAIL PROTECTED] (maxime louvel) writes:
On Tue, Apr 29, 2008 at 6:27 PM, Unruh [EMAIL PROTECTED] wrote:
[EMAIL PROTECTED] (maxime louvel) writes:
Hi,
I have know run a lot of tests.
Just to let you know what I've got so far.
I have tried NTP, and NTP + PTP (Precision Time Protocol).
I
it in a small lan.
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
Of Bill
should be made as simple as possible, but no simpler Albert
Einstein
And I think ntp is too simple.
-Original Message-
From: Bill Unruh [mailto:[EMAIL PROTECTED]
Sent: Wednesday, April 30, 2008 3:21 PM
To: Greg Dowd
Cc: questions@lists.ntp.org
Subject: RE: [ntp:questions] frequency
On Sun, 30 Mar 2008, [EMAIL PROTECTED] wrote:
At 04:51 PM 3/30/2008 -0700, Bill Unruh wrote:
Are those on the same day?
Yes, same day. Uncorrelated to anything I can identify
or each other. Same story on all the boxes. Running
a hefty multi-system compile with heavy NFS and Samba
[EMAIL PROTECTED] (Andy Helten) writes:
I use PoE every day -- it powers the outdoor antennae that connects to
my wireless ISP (distance of about 5 miles). I have gotten up to
3000kb/s over this link (which is slightly higher than what I'm paying
for). So, whatever you are debating here, PoE is
Bill Unruh [EMAIL PROTECTED] writes:
I have now run some absolute time discipline tests using chrony and ntp
The server is a GPS PPM disciplined clock using ntp. The client is a
machine on an ADSL line. The round trip between server and client is about
16ms, which is about 100 times longer than
David Woolley [EMAIL PROTECTED] writes:
Unruh wrote:
Under ... is the line
dst[i]=peer-filter_delay[j]
Apologies, I missed that detail. I guess dst has changed its meaning
over time. (It doesn't really look right to me though, as there is a
sudden discontinuity as you cross the Allan
On Wed, 30 Jan 2008, Danny Mayer wrote:
Unruh wrote:
David L. Mills [EMAIL PROTECTED] writes:
David,
We can argue about the Hurst parameter, which can't be truly random-walk
as I have assumed, but the approximation is valid up to lag times of at
least a week. However, as I
What was the problem?
On Mon, 28 Jan 2008, Danny Mayer wrote:
Unruh wrote:
[EMAIL PROTECTED] (Danny Mayer) writes:
David L. Mills wrote:
Danny,
It doesn't stop working; it just clamps whatever it gets to +-500 PPM
as appropriate. If the intrinsic error is greater than
On Mon, 21 Jan 2008, Danny Mayer wrote:
Unruh wrote:
All I say is that the experiments I have carried out show that ntp is slow
to converge if it starts of badly, and leaves the offset scatter larger
than chrony does. It does have a smaller scatter in the rate.
But you are using an
Having run NTP stably now for three days on a machine I previously ran
chrony on , I compared the control of the
clock on that machine with chrony and with ntp (the comparison is obviously
sequential, since both cannot run on the same machine at the same time.)
The chrony run was from Jan 13.5 to
I have been keeping track of the clocks on my various systems. One is
synced using ntp from a GPS 18LVM pps source. The others are synced from
that machine using chrony. Almost all of the systems have a very strange
oscillation in them, with a time scale of about 1.5 hours. On the ntp
system, this
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