Re: [ntp:questions] Problem with system clock refresh

David, David J Taylor wrote: JuanFran juanfranciscoj...@gmail.com wrote in message news:d693971e-be41-4a9b-9926-ed4a04f5b...@j9g2000vbp.googlegroups.com... Good mornig. I have a trouble with NTP. I want a refresh my sistem clock (client) with a LAN Server each 5 minutes. I don?t know any

Re: [ntp:questions] Problem with system clock refresh

David J Taylor wrote: [...] A better way which two of us have suggested might be to distribute an RS-232-level NMEA and PPS signal to /all/ the PCs (hope they have serial ports!) and run them /all/ as stratum-1 NTP devices. Please remember PPS support under Windows is only available in

Re: [ntp:questions] Problem with system clock refresh

Martin Burnicki wrote in message news:em22u6-ruq@gateway.py.meinberg.de... [] From the original question I'd understand that Juan expected the system time to be *set* once after each poll in 5 minute intervals. Of course ntpd doesn't work this way, but if you force the minpoll value

Re: [ntp:questions] Problem with system clock refresh

Martin Burnicki martin.burni...@meinberg.de wrote in message news:9732u6-r9s@gateway.py.meinberg.de... [] Please remember PPS support under Windows is only available in current development versions which will becomt the next release soon. However, ntpd v4.2.4p7 which is still the current

[ntp:questions] help with setting up NTP on windows with a USB GPS

Hi all, I am trying to setup NTP on Windows XP with a USB GPS at COM1. I can verify that the GPS is outputing $GPRMC strings at 1Hz with some other strings occasionally (eg at startup). I installed the Meinberg NTP server and then overwrote ntpd.exe with Dave Hart's executable. I disabled all

Re: [ntp:questions] help with setting up NTP on windows with a USB GPS

jack j.jack.w...@gmail.com wrote in message news:54ad71bf-d76a-47c1-a0b7-df492d9ed...@m38g2000yqd.googlegroups.com... Hi all, I am trying to setup NTP on Windows XP with a USB GPS at COM1. I can verify that the GPS is outputing $GPRMC strings at 1Hz with some other strings occasionally (eg

Re: [ntp:questions] help with setting up NTP on windows with a USB GPS

David, I read instructions on your web site especially the section on USB GPS receivers. Version 4.2.4 dated March 15 2009 is the latest on Dave Hart's website. Why do you get 4.2.5 from? jack On Nov 26, 12:20 pm, David J Taylor david-tay...@blueyonder.not- this-bit.nor-this-part.co.uk.invalid

Re: [ntp:questions] help with setting up NTP on windows with a USB GPS

David, I switched to a machine with an RS232 port and also found version 4.2.5. NTP now opens port COM1 with no problem. However, status shows that it doesn't seem to be reading from GPS since all values (jitter, offset etc) are 0. Any suggestions? Jack On Nov 26, 1:15 pm, jack

Re: [ntp:questions] help with setting up NTP on windows with a USB GPS

jack wrote in message news:c9339bbd-a773-44dc-92af-261308e3e...@31g2000vbf.googlegroups.com... David, I read instructions on your web site especially the section on USB GPS receivers. Version 4.2.4 dated March 15 2009 is the latest on Dave Hart's website. Why do you get 4.2.5 from? jack

Re: [ntp:questions] help with setting up NTP on windows with a USB GPS

jack wrote in message news:7a8980f8-5cbc-4100-9d84-2d5e2a93c...@e27g2000yqd.googlegroups.com... David, I switched to a machine with an RS232 port and also found version 4.2.5. NTP now opens port COM1 with no problem. However, status shows that it doesn't seem to be reading from GPS since

Re: [ntp:questions] help with setting up NTP on windows with a USB GPS

David, I only have the following in the configure file: server 127.127.20.1 minpoll 4 prefer I found the following entry in the log file: Using user-mode PPS timestamp Does it mean NTP reads the GPS strings and sees the 1PPS signal? All the values are still 0 including reach. At one point

Re: [ntp:questions] help with setting up NTP on windows with a USB GPS

Here is the entries in the log: 11/26/200916:26:34NTPNone3n/aDUALCORE Using user-mode PPS timestamp for GPS_NMEA(1) 11/26/200916:26:32NTPNone3n/aDUALCORE GPS_NMEA(1) serial /dev/gps1 open at 4800 bps 11/26/200916:26:32NTPNone

[ntp:questions] NTP 4.2.5p248-RC Released

Redwood City, CA - 2009/11/26 - The NTP Public Services Project (http://support.ntp.org/) is pleased to announce that NTP 4.2.5p248-RC, a Release Candidate of the NTP Reference Implementation from the NTP Project, is now available at http://www.ntp.org/downloads.html and

Re: [ntp:questions] help with setting up NTP on windows with a USB GPS

jack wrote: I am trying to setup NTP on Windows XP with a USB GPS at COM1. I can You are making life difficult. Without PPS, GPS has poor accuracy, and potentially high jitter. USB adds a lot of extra jitter. Windows is not the best platform for time keeping. I installed the Meinberg

Re: [ntp:questions] help with setting up NTP on windows with a USB GPS

jack wrote: Using user-mode PPS timestamp Does it mean NTP reads the GPS strings and sees the 1PPS signal? It probably means you have configured PPS on Windows, as Windows doesn't have kernel mode support for ntpd. I doubt that it implies that anything is working.

Re: [ntp:questions] help with setting up NTP on windows with a USB GPS

On Nov 26, 9:30 pm, jack wrote: I found the following entry in the log file: Using user-mode PPS timestamp Does it mean NTP reads the GPS strings and sees the 1PPS signal? Pretty much, yes. That message occurs only upon reading a CR when a DCD transition has been observed and its timestamp is

Re: [ntp:questions] help with setting up NTP on windows with a USB GPS

David Woolley da...@ex.djwhome.demon.invalid wrote in message news:hen3cv$ni...@news.eternal-september.org... jack wrote: I am trying to setup NTP on Windows XP with a USB GPS at COM1. I can You are making life difficult. Without PPS, GPS has poor accuracy, and potentially high jitter.

Re: [ntp:questions] help with setting up NTP on windows with a USB GPS

jack wrote in message news:9db25657-9837-4ebe-ab32-ce15ae968...@j35g2000vbl.googlegroups.com... David, I only have the following in the configure file: server 127.127.20.1 minpoll 4 prefer I found the following entry in the log file: Using user-mode PPS timestamp Does it mean NTP