Re: [ntp:questions] NTP offset doesn't change.

On Thu, Feb 12, 2015 at 7:27 PM, William Unruh un...@invalid.ca wrote: It was based on measurements I made with ntpd Are you assuming the numbers I provided are based on theory or were you looking over my shoulder when I perturbed system time by two milliseconds and watched it converge to

Re: [ntp:questions] NTP offset doesn't change.

On Thu, Feb 12, 2015 at 7:16 PM, William Unruh un...@invalid.ca wrote: Not really. But it should be distrubing that chrony disciplines clocks much better ( lower jitter) than does ntpd in normal situations. Why? And does that have lessons that ntpd could learn from? If you don't stop

Re: [ntp:questions] chrony as a server

On Mon, Feb 16, 2015 at 12:14 PM, David Taylor david-tay...@blueyonder.co.uk.invalid wrote: I have a non-trivial interest I meant in Ntimed (the system) not time transfer in general. If ntimed is not going to be available for Windows and OS/X that rules it out for the great majority of

Re: [ntp:questions] chrony as a server

On Thu, Feb 19, 2015 at 9:42 AM, Rob nom...@example.com wrote: Ok but of course we are using PPS and a 16 second polling interval. Use eight unless your system is broken in which replace it and then use eight. ___ questions mailing list

Re: [ntp:questions] NTP offset doesn't change.

On Sat, Feb 14, 2015 at 11:21 PM, William Unruh un...@invalid.ca wrote: If you demand that I give detailed explanation You started off down the ntpd versus chrony path again. To get the discussion started, lets compare some of the differences between chrony and ntpd That's not useful.

Re: [ntp:questions] NTP offset doesn't change.

On Mon, Feb 16, 2015 at 1:11 AM, William Unruh un...@invalid.ca wrote: But that is not what you said. When I asked how ntimed works you answered that it disciplines the computer clock. BZZT! You said: Be interesting to see how and what it does. To which I replied: Since I've told you how

Re: [ntp:questions] chrony as a server

On Thu, Feb 19, 2015 at 6:16 PM, Harlan Stenn st...@ntp.org wrote: While that document is old and unmaintained So put an appropriate note at the top of it and on the link to it from the WebHome page. No one that stumbles onto it is going to find any gems.

Re: [ntp:questions] chrony as a server

On Thu, Feb 19, 2015 at 5:34 AM, David Taylor david-tay...@blueyonder.co.uk.invalid wrote: Does not NTP's orphan mode and local clock driver provide this? Refclock 1 (LOCAL/LOCL) is deprecated and I believe as of a recent release it's useless* but Orphan mode is intended to replace the local

Re: [ntp:questions] GPS Offset problems

On Fri, Jan 30, 2015 at 8:09 PM, utah...@gmail.com wrote: Any idea what I am doing wrong? Probably nothing wrt the Datums. The 2100 has the apply as soon as announced leap second bug. There are some receivers. including the Z3812, that want to apply the leap second in March but the Z3801 is

Re: [ntp:questions] Timekeeping on Windows 2008r2 VM on Linux QEMU/KVM

On Thu, Jan 22, 2015 at 10:28 PM, Harlan Stenn st...@ntp.org wrote: They are both reporting seconds. I'll change the subject on any further messages regarding sntp as a proper replacement for ntpdate. ___ questions mailing list

Re: [ntp:questions] NTP 4.2.8 for Windows, not branded

On Fri, Jan 9, 2015 at 5:57 PM, trackeroft...@gmail.com wrote: Yes, it is still not clear for me. If p1 is the latest release so why the files are marked as beta4, beta5? It looks like rc version, not final. Assuming it's something like 4.2.8p1-beta5: 4.2.8P1BetaN are newer than 4.2.8 but

Re: [ntp:questions] Leap second to be introduced in June

Why do folks mention leap seconds on this list? Why do people point to leap-seconds.NTPtimestamp instead of just leap-seconds.list? My five line leap second file with comments and one extra line for (completely unnecessary) context. #$ 3629404800 #@ 3660249600 3550089600 35 #

Re: [ntp:questions] Leap second to be introduced in June

On Sun, Jan 11, 2015 at 11:34 PM, brian utterback brian.utterb...@oracle.com wrote: On 1/11/2015 10:40 PM, William Unruh wrote: Well, actually as I understand it, ntpd does stop the cclock for that second That is not the case. That is the behavior that the kernel reference code

Re: [ntp:questions] Leap second to be introduced in June

On Mon, Jan 12, 2015 at 12:46 AM, Mike Cook mike.c...@orange.fr wrote: Why do folks mention leap seconds on this list? part of the NTP protocol deals with the scheduling insertion/deletion of leap seconds. I should have phrased that differently. Or just let it go. Why do people

Re: [ntp:questions] NTP 4.2.8 for Windows, not branded

On Mon, Jan 12, 2015 at 10:58 AM, Danny Mayer ma...@ntp.org wrote: None of these are valid nor are they for you to use. Take down the mailing list/Usenet gateway. Or make it smarter. I would vote for the former. ___ questions mailing list

Re: [ntp:questions] NTP offset doesn't change.

On Fri, Feb 13, 2015 at 12:42 AM, William Unruh un...@invalid.ca wrote: OK, so we seem to have two different sets of experiments with very different results. Note that I did not erase the drift file, or restart ntpd after my perturbation. Okay, I offset my clock by 100ms without restarting

Re: [ntp:questions] NTP offset doesn't change.

On Fri, Feb 13, 2015 at 8:48 PM, William Unruh un...@invalid.ca wrote: I had a properly set up PPS source to do the comparison. As did I. Ooops, I see that the text/plain part of the message was damaged. I was quoting you saying: I had a properly set up PPS source and my response was we

Re: [ntp:questions] NTP offset doesn't change.

On Sat, Feb 14, 2015 at 2:09 PM, William Unruh un...@invalid.ca wrote: Because ntpd is what I know. Except you've admitted you don't know NTPd. If you are saying that this is all up in the air again with the new replacement, that would be great. But I have seen no evidence thereof in

Re: [ntp:questions] NTP offset doesn't change.

On Sat, Feb 14, 2015 at 6:38 PM, William Unruh un...@invalid.ca wrote: When timed is actually out I may be interested in testing it again. Ntimed-client. Again? So you've installed the code? https://github.com/bsdphk/Ntimed That seems unlikely. Read this:

Re: [ntp:questions] ambient temperature and it's effects on ref-ntpd (was NTP offset doesn't change.

On Sat, Feb 14, 2015 at 9:33 PM, Harlan Stenn st...@ntp.org wrote: I have to wonder if it would be an appropriate GSoC project to write something that monitors and tracks available temperature sensors and correlates temperature (perhaps with the first derivative) with the resulting effect on

Re: [ntp:questions] leapseconds.list updates and ntpd

On Tue, Feb 10, 2015 at 12:19 PM, Harlan Stenn st...@ntp.org wrote: No. The code looks for an updated file (daily, I think, more often as we get closer to an expiration). It checks every SECSPERDAY after start. I didn't notice any adjustments to the interval (leapf_timer) and the comment

Re: [ntp:questions] NTP offset doesn't change.

On Wed, Feb 11, 2015 at 8:22 AM, brian utterback brian.utterb...@oracle.com wrote: But no one who does actively engage really understands it or knows how to improve it. Unruh has a point, we don't know if there isn't a better way built on statistical analysis. Since it seems the NTF

Re: [ntp:questions] NTP offset doesn't change.

On Thu, Feb 12, 2015 at 3:43 AM, William Unruh un...@invalid.ca wrote: It is hard to complain about a non-existant product. As has been previously mentioned ntimed(-client) is in early release. I've been running it since late December. ___ questions

[ntp:questions] PHK on Ntimed and Chrony

I'm not completely convinced this is relevant to this list but I'm loath to paraphrase, restate, summarize or condense the Ntimed notes so quoting PHK https://news.ycombinator.com/item?id=8781435: I'm not keen on saying too much about Chrony, I'd rather let people without a stake in the game

Re: [ntp:questions] NTP offset doesn't change.

On Sun, Feb 15, 2015 at 1:18 PM, William Unruh un...@invalid.ca wrote: Thank you. I had no idea what the new version was called, and saw someone call it timed. Sorry if it confused you. This means you're not paying attention to details. It also means you're not reading PHK's notes. I

Re: [ntp:questions] chrony as a server

On Wed, Feb 18, 2015 at 8:53 PM, William Unruh un...@invalid.ca wrote: On 2015-02-19, Paul tik-...@bodosom.net wrote: On Wed, Feb 18, 2015 at 6:49 AM, Charles Elliott elliott...@comcast.net wrote: If you don't mind me asking, why is chrony superior to NTPD for tracking a PPS signal

Re: [ntp:questions] chrony as a server

On Wed, Feb 18, 2015 at 6:49 AM, Charles Elliott elliott...@comcast.net wrote: If you don't mind me asking, why is chrony superior to NTPD for tracking a PPS signal, or even in general Chrony (in general) pros and cons:

Re: [ntp:questions] failing-over flaky upstream servers

On Thu, Mar 12, 2015 at 8:36 AM, Paul paul-ntp-questi...@lookmumnohands.net wrote: I would like my ntpd to continue serving time, gracefully choosing from the best available upstream servers. ... 3. PPS signal derived from GPS. Excellent accuracy, but only available say 90

[ntp:questions] failing-over flaky upstream servers

configuring ntpd for these clocks? -- Paul. ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions

Re: [ntp:questions] failing-over flaky upstream servers

(28) for my particular case. [1] http://doc.ntp.org/4.1.1/driver1.htm -- Paul. ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions

Re: [ntp:questions] failing-over flaky upstream servers

On Thu, Mar 12, 2015 at 2:12 PM, Paul paul-ntp-questi...@lookmumnohands.net wrote: As you'd well know, the PPS signal stops when the unit is tracking less than three satellites. That's the win for a timing receiver. It will have single satellite mode. (The whole prior to 4.2.8 thing

Re: [ntp:questions] failing-over flaky upstream servers

around! In each case you probably want to use orphan mode. Was not aware of that. I will need to do some reading. -- Paul. ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions

Re: [ntp:questions] Could some one help in pointing out the error here

On Mon, Mar 2, 2015 at 4:37 AM, catherine.wei1...@gmail.com wrote: I need to use the following commands in my system: :config server :config restrict ... :config unconfig ... Refer to http://www.eecis.udel.edu/~mills/ntp/html/confopt.html It's :config unpeer not :config unconfig.

Re: [ntp:questions] chrony as a server

On Mon, Feb 23, 2015 at 12:53 PM, William Unruh un...@invalid.ca wrote: As Lichvar says with chrony you periodically read your watch, or listen to radio, and set the time and chrony figures out that you have a drift rate of about 30PPM and corrects. Now you may not value that possibility,

Re: [ntp:questions] chrony as a server

On Tue, Feb 24, 2015 at 1:14 PM, Charles Swiger cswi...@mac.com wrote: On Feb 23, 2015, at 11:57 PM, David Woolley david@ex.djwhome.demon.invalid wrote: On 23/02/15 21:23, William Unruh wrote: manual corrections are probably good to 1 sec. It's a long time since I did this, but 200ms is

Re: [ntp:questions] Pool server gone wild

On Fri, Feb 20, 2015 at 6:21 PM, Harlan Stenn st...@ntp.org wrote: This is interesting. It may be that only 4 responses are returned at a time, but there has been lots of evidence and experience that depending on your resolver (most resolvers, from what I've seen), you won't get the same

Re: [ntp:questions] chrony as a server

On Fri, Feb 20, 2015 at 3:23 PM, William Unruh un...@invalid.ca wrote: ??? how do assume that the chrony docs do not tell the truth? I don't understand that sentence. ___ questions mailing list questions@lists.ntp.org

Re: [ntp:questions] chrony as a server

On Sat, Feb 21, 2015 at 1:57 AM, William Unruh un...@invalid.ca wrote: On 2015-02-21, Paul tik-...@bodosom.net wrote: On Fri, Feb 20, 2015 at 3:23 PM, William Unruh un...@invalid.ca wrote: ??? how do assume that the chrony docs do not tell the truth? ^ you Okay, I'll assume

Re: [ntp:questions] chrony as a server

On Tue, Feb 24, 2015 at 4:17 PM, William Unruh un...@invalid.ca wrote: It is superior in that you can do it easily. Whether that is of any importance to you is of course up to you. Myself I have never used it. As is often the case you completely miss the point. Fine. It has already been

Re: [ntp:questions] chrony as a server

On Tue, Feb 24, 2015 at 3:22 PM, Charles Swiger cswi...@mac.com wrote: Data is available. Feel free to review the papers referenced from: I was unclear. I mean specific research regarding disciplining a clock via manual correction not human coordination or fine motor control. As I said, an

Re: [ntp:questions] custom NMEA messages

On Mon, Jan 4, 2016 at 3:58 AM, Hal Murray wrote: > > On Tue, Dec 29, 2015 at 4:08 PM, Brian Inglis < > brian.ing...@systematicsw.ab.ca> wrote: > > If you are looking at NMEA message timing - that's all over the board on > > every device > > No, some devices do it right.

Re: [ntp:questions] Best NMEA sentence

On Sun, Feb 21, 2016 at 9:43 PM, Brian Inglis < brian.ing...@systematicsw.ab.ca> wrote: > To amplify: would you suggest that the spec in that case should be FreeBSD > on a > Soekris or similar with an HP primary or secondary reference clock or > similar? I can't imagine any circumstance where I

Re: [ntp:questions] Fw: NTP and Trimble TSIP

there's been no interest in supporting newer Trimble devices (Resolution etc.). I can send you a patch (which also fixes the smal bug in the Thunderbolt code) that I'd expect to work with the ICM if you like. Note that the consensus is that 10Mhz from from a GPS module is pretty b

Re: [ntp:questions] Fw: NTP and Trimble TSIP

On Tue, Feb 16, 2016 at 7:40 PM, Brian Inglis < brian.ing...@systematicsw.ab.ca> wrote: > > This module specs don't mention frequency output other than 1PPS which is > specced within 60ns, so much better than almost all. If it also supports > TRAIM and sawtooth correction, the driver can improve

Re: [ntp:questions] Best NMEA sentence

On Sat, Feb 20, 2016 at 6:58 AM, Neil Green wrote: > Is there a generally accepted NMEA “best sentence” for use with ntp? For > example, I’ve seen GPRMC ... > RMC is the best. Athough it abbreviates the year to two digits it provides a complete timestamp plus fix validity

Re: [ntp:questions] Testing IPv6 code

The proximate cause is using the wrong name for the pool. 2.pool.ntp.org will return IPv6. Use one of those. ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions

Re: [ntp:questions] Help: fudge time2 value for NMEA driver

On Thu, Nov 3, 2016 at 2:27 PM, Brian Inglis < brian.ing...@systematicsw.ab.ca> wrote: > > What do your refclock ntp.conf lines look like? > I'm not sure why you're asking but: # PPS (ATOM) server 127.127.22.0 minpoll 3 fudge 127.127.22.0 refid GPPS # NMEA @19200 server 127.127.20.0 minpoll 3

Re: [ntp:questions] Help: fudge time2 value for NMEA driver

On Sun, Oct 30, 2016 at 1:29 PM, ogre up wrote: > Hello everyone, I've setup a NMEA+PPS ntp server, but both ref clock have > strange offset value reported by ntpq -p. > Your billboard is fine. If you want less jitter in your NMEA sentences you need to buy better hardware.

Re: [ntp:questions] Help: fudge time2 value for NMEA driver

On Thu, Nov 3, 2016 at 11:59 PM, Brian Inglis < brian.ing...@systematicsw.ab.ca> wrote: > > The JLT Fury emulates the HP/Symmetricom/Agilent/Keysight 58503 which is a > newer variant of the venerable HP38xx GPS-DOs, > Sure but this is tne NTP list and if you have a Fury you should use NMEA. The

[ntp:questions] What happened to the software of which ntimed-client was a part?

The schedule seems to have slipped. The last update with a date was maybe two years ago with some speculation that the master could be done a year ago. Did the Linux Foundation lose interest? Given the alternative I was hoping for a bit more code. ___

[ntp:questions] 4.2.8p9 build issue on ARM running Ubuntu 14.04

[conflicting types for 'EVP_MD_CTX'] I've been able to build every version for some time but I can't build 4.2.8.p9/ARM/Ubuntu 14.04 because of the changes to a_md5encrypt. I don't cross-compile. Before I start trying to figure this out I thought I'd ask if there's something obvious I've

Re: [ntp:questions] Looking for a NTP stratum 2 appliance

"The Securities and Exchange Commission (SEC) approved a new clock synchronization standard of 50 milliseconds applicable to computer clocks that are used to record certain events in NMS securities or OTC equity securities. Firms have six months from the effective date, until February 20, 2017, to

Re: [ntp:questions] Looking for a NTP stratum 2 appliance

I also assumed that despite what you wrote you were using your (too few) S1 devices. I would agree that you probably should not poll NIST at small intervals for various reasons. However I suspect that there's a deeper misunderstanding. Per NIST the US Federal GNSS system (known as the Global

Re: [ntp:questions] Looking for a NTP stratum 2 appliance

On Fri, May 26, 2017 at 10:33 PM, Harlan Stenn wrote: > NIST doesn't control GPS. That's done by USNO and the USAF. > This is true(ish)* but irrelevant. NIST defines traceability to NIST and GPS can be a component of UTC(NIST) traceability. More importantly the premise of this

Re: [ntp:questions] Looking for a NTP stratum 2 appliance

On Mon, May 29, 2017 at 4:24 AM, François Meyer wrote: > the problem is with GPS Time, that is not UTC(USNO) and not traceable This is not correct (per USNO). "GPS Time" is traceable (in NIST usage) to UTC(USNO) and hence UTC. The GPS message carries the current

Re: [ntp:questions] NTP under AIX?

On Thu, May 18, 2017 at 3:06 PM, Brian Inglis < brian.ing...@systematicsw.ab.ca> wrote: > A lot of these types of boxes appear to be some type of SoC board with > some GPS module, some Linux distro, some NTP release, probably GPSd, > and with little in the way of docs, specs (typical: <1us!),

Re: [ntp:questions] NTP under AIX?

On Thu, May 18, 2017 at 2:20 PM, Brian Inglis < brian.ing...@systematicsw.ab.ca> wrote: > JLT Fury is overkill if you don't need better than Rb performance > and stability. > Ooops. I typed JF rather than JL (Jackson Labs). I picked the Fury over the other JL products because it comes in a

Re: [ntp:questions] Poll timing

to poll all its servers more-or-less simultaneously, causing bursty network traffic. See http://www.eecis.udel.edu/~mills/ntp/html/ntpd.html#op: In order to protect the network from bunching, the initial poll interval for each server is delayed an interval randomized over a few seconds. Paul

Re: [ntp:questions] Poll timing

Jussi, If you have two requirements: 1. You want to use NTP (or some derivative of NTP), 2. You want tight control over the timing of the polling, then I would suggest that these two requirements are mutually incompatible. Paul ___ questions mailing

Re: [ntp:questions] Poll timing

NTP. Paul ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions

Re: [ntp:questions] project ntp.br - discrepancy from UTC

://tycho.usno.navy.mil/gps_datafiles.html. Paul ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions

Re: [ntp:questions] ntpd crashing on startup

/show_bug.cgi?id=893 for details. Paul ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions

Re: [ntp:questions] Standalone PC Clock Sync

To allay suspicions that this newsgroup might be biased pro-Meinberg, I'll just add that PCI cards are also available from Hopf: http://ww.hopf.com/. Paul ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo

Re: [ntp:questions] GPS and NTP Server

to configure and compile the source files in order to include support for your refclock. If you ask us specific questions, we can help you better. Paul On Jan 30, 8:16 am, noosh [EMAIL PROTECTED] wrote: Hi I Have a GPS and NTP Server. is it possible for NTP server to get time from GPS if i

Re: [ntp:questions] GPS and NTP Server

once per second and use this information to synchronize your server's system clock. For more details, see Dave Mill's excellent pages at http://www.eecis.udel.edu/~mills/database/brief/overview/overview.ppt etc. Paul ___ questions mailing list questions

Re: [ntp:questions] Configuration files missing after make all

work just fine, if that's where you want to put your config file. Paul ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions

Re: [ntp:questions] GPS with PPS without any soldering requirements?

Folkert, Take a look at http://www.cnssys.com/cnsclock/CNSClockII.html. Paul ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions

Re: [ntp:questions] NTP on local network

? Are you using the PPS signal? It might be useful if you could post the ntp.conf file and the output of ntpq on the stratum-1 server that has the GPS refclock. Paul ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo

Re: [ntp:questions] Leap second functional question

See http://www.eecis.udel.edu/~mills/leap.html. That would seem to be the authoritative source. Paul ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions

Re: [ntp:questions] Leap second functional question

seconds. In the TAI time scale, the minute, hour, day, week are of constant duration. Paul ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions

Re: [ntp:questions] remote NTP server

It's also possible to buy NTP appliances, some of which are basically just what you describe: a GPS coupled to an SBC. See for example http://www.meinberg.de/english/products/lantime-m300-gps.htm. Paul ___ questions mailing list questions

Re: [ntp:questions] Does the EU or European country have an equivalent of http://www.usno.navy.mil ?

For Switzerland: http://www.metas.ch/metasweb/Fachbereiche/Zeit_Frequenz ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions

Re: [ntp:questions] set up NTP

See also: http://support.ntp.org/bin/view/Support/QuickStartIndex Paul ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions

Re: [ntp:questions] Regarding Primary/Secondary NTP setup

Goran, Under normal running conditions, NTP exchanges a pair of 90-byte packets every 1024 seconds. That's traffic over the wire amounting to about 1.4 bits per second. Is that acceptable, or are you really insisting that the traffic must be zero bps? Paul

Re: [ntp:questions] PARSE refclock for DCF77

reception improves. Paul ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions

Re: [ntp:questions] What exactly does Maximum Distance Exceded mean?

Joseph, If you're not willing to get the source code for NTP and compile it, you can download a binary from http://www.sunfreeware.com/. It's probably configured with a 'standard' set of refclock drivers and, as a consequence, may be larger than a custom-configured version. Paul

Re: [ntp:questions] What exactly does Maximum Distance Exceded mean?

configured with a 'standard' set of refclock drivers and, as a consequence, may be larger than a custom-configured version. Paul How important is size in today's Sun's systems, or even ones a few years old?  The ntpd file I see is less than 0.5MB (admittedly  Windows version), and occupies

[ntp:questions] ART GAMES

___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions

[ntp:questions] Running two ntpd systems in parallel

functionality. I am using ntp-dev-4.2.5p82, and apply the patch attached listed below to change the network port. Can anyone help me solve this problem? Cheers, Paul diff -urN unmod/ntp-dev-4.2.5p82/include/ntp.h ntp-dev-4.2.5p82/include/ntp.h --- unmod/ntp-dev-4.2.5p82/include/ntp.h2007-10

Re: [ntp:questions] Running two ntpd systems in parallel

2009/10/17 Dave Hart daveh...@gmail.com: On Mon, Sep 14, 2009 at 11:23 AM, Paul Fleischer p...@xpg.dk wrote: I would like to see ntpd support unprivileged operation for testing purposes, including using a local port 1024.  The approach I have been considering is adding a port option

[ntp:questions] Linux, Garmin GPX-18X LVM PPS

my questions: 1) Is ntpd getting the PPS information? 2) Should I put the ldattach 18 /dev/ttyS0 command in rc.local - currently I'm running it manually after each boot. Thanks! Paul.-- This message (and any attachments) is for the recipient only. NERC is subject to the Freedom of Information

Re: [ntp:questions] Linux, Garmin GPX-18X LVM PPS

the software. I think I just used -- enable-NMEA. Should I have done something else? Thanks! Paul. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ___ questions mailing list questions

Re: [ntp:questions] Linux, Garmin GPX-18X LVM PPS

Hello Miguel, On 6 Dec 2011, at 16:00, Miguel Gonçalves wrote: Beware: long e-mail ahead! LOL! Wasn't that long :-) On 6 December 2011 14:49, Paul Duncan p...@noc.ac.uk wrote: Hi Miguel, Thanks very much for getting back to me. No problem. I've been helped before so I'll do my best

Re: [ntp:questions] Linux, Garmin GPX-18X LVM PPS

On Tue, 2011-12-06 at 19:31 +, unruh wrote: On 2011-12-05, Duncan, Paul A. p...@noc.ac.uk wrote: Hello, I am trying to set up an NTP server using the Garmin GPS-18 as the reference clock. I think I'm most of the way there, but I have a couple of questions. Firstly, here

Re: [ntp:questions] Linux, Garmin GPX-18X LVM PPS

think this *may* be because I have not added the ATOM driver during the configure, so that is what I will try now. Thanks for all your help so far. Best Regards, Paul. On Wed, 2011-12-07 at 21:25 +, Harlan Stenn wrote: Paul wrote: somebody wrote

Re: [ntp:questions] Linux, Garmin GPX-18X LVM PPS

got my first CD drive (a Mitsumi) in the early 90's onto an i386sx running at 20MHz with about 4MB of RAM (in SIP modules). Thanks for all your help so far, Paul. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean

Re: [ntp:questions] Accuracy of NTP - Advice Needed

On Friday 23 December 2011 03:25:18 Dave Hart wrote: On Thu, Dec 22, 2011 at 19:11, Paul Sobey bud...@the-annexe.net wrote: - can ntpd's own reported offset (ntpq -p or loopstats) be trusted (assuming high priority means it gets scheduled as desired)? I've quoted our apparent numbers

Re: [ntp:questions] Accuracy of NTP - Advice Needed

Paul Sobey wrote: Our internal testing to this point is that a stock ntpd pointed against a stratum 1 clock on a low contention gigabit ethernet (stratum 1 source and client less than 1ms apart) reports its own accuracy at approx 200 microseconds. Further tuning the ntp config by adding

Re: [ntp:questions] Accuracy of NTP - Advice Needed

the remaining offset was no longer a good measure. The offset on a locked up system should be several times larger than the RMS error in the actual system time. Understood, at least in part. I have a nice Christmas reading list of man pages and white papers! Cheers, Paul

Re: [ntp:questions] Accuracy of NTP - Advice Needed

, and praying that the hosts have a serial port connection! Well that's the rub - some of them don't :) If nothing else it might inform new hardware purchases though. Some of these sites vary in their willingness to allow GPS antenas on roofs as well, joy. Cheers, Paul

[ntp:questions] Second attempt at GPS-18 based NTP server

Please note, I have not done any recompiling of the kernel at this stage - just using the GENERIC kernel, because after reading the comments from Per Hederland in the System software customisation section of the above web page, it seemed unnecessary. Comments? Thanks for your help! Paul. -- Sent

Re: [ntp:questions] Second attempt at GPS-18 based NTP server

128 3776.066 -0.228 0.660 *GPS_NMEA(0) .PPS.0 l2 64 3770.000 -0.001 0.001 I'm fairly sure that there should be a lower case o to the left of GPS_NMEA, and there is not. Am I right to be worried? Thanks again! Paul.-- This message (and any attachments

Re: [ntp:questions] ntp version 4.2.7p257-o

. But depending on your weather, you can leave it outside for long periods of time, so I'm gonna vote for the Garmin :-) Best Regards, Paul. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean

Re: [ntp:questions] site with lots of GPS's and accessories

Another possibility: For the homebrewers: http://www.u-blox.com/en/gps-modules/u-blox-6-timing-module/lea-6t.html There's also an evaluation kit: http://www.u-blox.com/en/evaluation-tools-a-software/gps-evaluation-kits/evk-6t.html ___ questions

[ntp:questions] Which refclock driver for Hopf?

Hi, The standard distribution includes two refclock drivers for Hopf timecode receivers: 127.127.8.0 mode 12 (the generic PARSE driver), and 127.127.38.0. Which should I use? What are the pros and cons? Thanks, Paul ___ questions mailing list

[ntp:questions] Is it possible to confuse ntpd's freq error measurement procedure?

Hello. I have two ntpd peers which exchange time between themselves and also receive time from external server. I believe that at some moment connection to external server was lost and time on these two peers drifted a bit. When connection to external server was restored both ntpd on both peers

Re: [ntp:questions] Is it possible to confuse ntpd's freq error measurement procedure?

Thanks Dave. I have some realtime processes on this server and 128ms is too much for stepping. But thanks for the hint now I have some start point to investigate 2012/6/7 Dave Hart h...@ntp.org On Wed, Jun 6, 2012 at 6:07 PM, Paul Malishev p.malis...@gmail.com wrote: Hello. I have two

Re: [ntp:questions] Is it possible to confuse ntpd's freq error measurement procedure?

Oh. Thanks. This true flag may be the root cause of the problem. Along with slew adjusting instead of stepping. Thank you, I'll try to investigate his problem further. 2012/6/7 E-Mail Sent to this address will be added to the BlackLists Null@blacklist.anitech-systems.invalid Paul Malishev

[ntp:questions] shared memory driver not working under windows 4.2.7p273++ build?

? If not, what can be done as a replacement for these drivers, or can they be enabled? kind regards Paul Kennedy ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions

[ntp:questions] shared memory driver not working under windows4.2.7p273++ build?

Good morning Sir, I am not sure what this reply indicates. Does it mean the Windows port does not / cannot support shared memory drivers? The comment is a little ambiguous (replaced with what?) CommitLog-4.1.0(5519,45): * ports/winnt/: Replaced with new code (no SHM or PALISADE)

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