I recently needed to synchronize a Windows XP machine with GPS time. One of the requirements was sub-millisecond accuracy, which is no small thing for non-RTOS computers. David Hart to the rescue! He has written an driver for the NTP (network time protocol) service to incorporate a PPS (pulse per second) signal. The PPS signal, coming from a GPS, is highly accurate after sufficient time has elapsed for the GPS to sync with the satellites. I’ve received a lot of help from David Taylor; thanks again, David! So, without further ado, here’s an example of how to proceed with the installation:
[UPDATE: from David Hart – “I’ve posted a new serialpps-20091228.zip which should correct that [install.bat bug]. The (huge) debug build of serialpps-ppsapi-provider.dll is also added, along with a tiny bit of instructions in install.bat regarding PPSAPI_DLLS.”]
1. Configure hardware.
Connect the PPS signal to the DCD pin on the RS232 connector.
2. Install Meinberg NTP software.
Keep all defaults.
Create and use a special NTP account. (I always had problems using anything else)
Account name: ntp (use whatever you want)
Account pass: ntpntp
3. Stop NTP.
Run “C:\Program Files\NTP\bin\stopntp.bat”. There are alot of useful utils in the \bin directory.
4. Replace ntpd.exe with altered version.
Extract “ntpd.exe” from “ntp-4.2.4p6-DLH-QPC-20090315-bin.zip”
Copy to “C:\Program Files\NTP\bin”, replacing previous ntpd.exe.
5. Install SerialPPS.
Extract all from “serialpps-20090606.zip“.
Edit “install.bat”
On line 6, remove ‘if “x86″==”%PROCESSOR_ARCHITECTURE” ‘
Remove line 7 and 8 (you can just put “REM ” in front and they will be ignored, almost like a comment)
Run “install.bat”
Ensure that “serialpps.sys” was copied to “C:\Windows\system32\drivers”
Copy “serialpps-ppsapi-provider\x86\serialpps-ppsapi-provider.dll” to “C:\”
Right-click “My Computer”, go to properties.
Click “Advanced” tab
Click “Environment Variables” button
Under “System variables”, Click “New” button
Name: PPSAPI_DLLS
Value: C:\serialpps-ppsapi-provider.dll
6. Configure GPS (for Garmin)
Run “SNSRCFG.exe”
Connect to GPS
Configure
Set baud rate to 4800
Enable “Pulse Per Second”
Press F7
Enable GPRMC, disable others
Send config to GPS
7. Configure NTP
Edit “C:\Program Files\NTP\etc\ntp.conf”
Remove all entries, add the following
driftfile “C:\Program Files\NTP\etc\ntp.drift”
enable stats
statsdir “C:\Program Files\NTP\etc\”
statistics loopstats
server 127.127.22.1 minpoll 4 #PPS
server 127.127.20.1 iburst prefer minpoll 4 maxpoll 7 #GPS
#fudge 127.127.20.1 time1 0.4 refid GPS #uncomment and change time1 as needed
8. Ensure GPS is connected to serial port 1
9. Restart computer
10. Unplug GPS and disable Microsoft Ball-mouse (if listed)
Go to device manager: My Computer->Properties->Hardware->Device Manager
Under “Mice and other pointing devices”, right-click and disable “Microsoft Serial BallPoint”
11. Reconnect GPS Restart computer
12. Start NTP server
Run “C:\Program Files\NTP\bin\startntp.bat”
13. Monitor NTP server
Run “C:\Program Files\NTP\bin\ntpstatus.bat”
Both GPS and PPS should show up. After the GPS gets a lock, NTP should sync to the servers.
Refer to online documentation for help.
Alternatively, use “NTP Time Server Monitor” from Meinberg
To Uninstall PPS driver, run “uninstall.bat”.
November 29, 2020 at 8:33 pm
sr12 herbal skincare merupakan produk perawatan wajah sekaligus tubuh yang terbuat herbal dan bahan-bahan alami. Dapatkan di toko online kami https://geraisr12.com/
November 29, 2020 at 11:48 pm
thanks for sharing
November 30, 2020 at 3:03 am
https://editor.id/ merupakan Media informasi terpercaya, Menjaga Keutuhan Bangsa, dan Mengawal NKRI
December 1, 2020 at 2:08 am
Duniafilm21 Situs nonton film onlinesubtite indonesia terlengkap dan hemat kuota.
December 1, 2020 at 2:09 am
Youwatch Situs nonton drama korea subtite indonesia terlengkap dan hemat kuota.
December 1, 2020 at 2:12 am
Dutafilm situs download film indonesi aterbaik gaess, monggo mampir…
December 1, 2020 at 10:06 am
Really great and useful post, thanks for sharing.
شركة مكافحة حشرات بجازان
December 1, 2020 at 10:07 am
Really great and useful post, thanks for sharing.
December 1, 2020 at 9:13 pm
Distributor oli industri adalah salah satu perusahaan yang bergerak bergerak di bidang Supplier dan Distributor oli pelumas dan grease gemuk untuk industri, mesin kapal, alat berat dan mesin kendaraan.
December 1, 2020 at 9:55 pm
harga plakat akrilik
pesan sekarang juga dengan kami
December 3, 2020 at 2:50 am
Lk21 Semi hanya menyajikan film unggulan untuk kalian pencinta film semi
December 3, 2020 at 10:42 pm
We are a provider that provides free premium ssh free SSH server (Dropbear & OpenSSH), VPN account, OpenVPN server with protocol SSL/TLS UDP/TCP, V2ray Server, ShadowSocks, PPTP, WireGuard VPN and Proxy List, we use the faster servers around the world from a variety of data center server we had.
December 4, 2020 at 2:18 am
Game for real money Game for real money If you like to play the game and want to earn money from playing that game, you must here siamruay, the popular online betting game, such as the blow-up, chu-chu, head-koi, high and low, just guess it correctly and get money to use. Easy to use It’s convenient to be where you can play through your mobile phone. Open to play 24 hours a day
December 4, 2020 at 7:58 pm
temukan tips dan trick terbaru seputar game di website kami https://aoicyber.blogspot.com
December 5, 2020 at 12:07 am
Awesome Article…
December 5, 2020 at 12:08 am
Thank You for Share Your Knowledge.
December 5, 2020 at 8:49 am
Harika bir site sohbet chat odalari ucretsiz chat mobil sohbet
December 7, 2020 at 12:26 am
dutafilm merupakan tempat nonton film subtitle Indonesia dengan kualitas HD secara gratis. Streaming film box office terbaru dan tempat Download terbaru.
December 7, 2020 at 9:44 pm
cek di sini 5 Obat Kuat Alami yang Aman untuk Pria, Istri Dijamin Puas!
December 7, 2020 at 9:45 pm
yuk cek di sini 5 Obat Kuat Alami yang Aman untuk Pria, Istri Dijamin Puas!
December 9, 2020 at 12:25 am
Bandar ceme online terpecaya untuk jadi pilihan utama kalian
December 9, 2020 at 10:20 am
Jasa Kirim Barang Ke Seluruh Indonesia
December 9, 2020 at 10:21 am
Jasa Kirim Barang Ke Seluruh Indonesia
December 9, 2020 at 2:05 pm
wow thanks!
December 9, 2020 at 9:26 pm
agen bandarq sangat aman dan terpecaya untuk pilihan kalian bertaruh dengan tenang
December 10, 2020 at 4:57 am
En iyi islami sohbet dini sohbet odalari
December 10, 2020 at 6:12 am
ATT Email Login is performed by various users around the globe. This mail service provides the user with the best benefits to its user in every possible way. The user can perform this by following some of the easiest steps. Enter the username and password.
https://emaillogin.info/att-email-login/
December 12, 2020 at 12:27 am
thanks for the information boss
thank you
December 12, 2020 at 4:00 pm
Nonton film bioskop 21 box office hanya di situs Bos21 sebagai layanan nonton film gratis terbaik.
December 13, 2020 at 12:35 pm
بنزالکونیوم کلراید
سلام این مقاله رو مطالعه کنید
https://arvandshimi.ir/%d8%a8%d9%86%d8%b2%d8%a7%d9%84%da%a9%d9%88%d9%86%db%8c%d9%88%d9%85/
December 13, 2020 at 7:30 pm
یخچال فریزر ، ساید بای ساید ، یخچال فریزر دوقلو ، یخچال هتلی
همگی در سرویس برتر تعمیر میشوند
December 14, 2020 at 7:45 am
Yuvam sohbet odalari sohbet uygulamasi
December 14, 2020 at 10:37 pm
website https://www.bolamas888.com/Main.aspx merupakan Judi Bola terpecaya untuk tempat bertaruh team kesayangan kamu
December 15, 2020 at 7:25 am
Install the Meinberg NTP port for Windows – download here: http://www.meinbergglobal.com/english/sw/ntp.htm
Installation instructions are here.
For Windows Vista and Windows-7 I recommend installing to C:\Tools\ rather than C:\Program Files\
Download the latest development binaries for Windows here.
Stop the NTP service, and overwrite the files in C:\Tools\NTP\bin\ with those from the download.
Restart the NTP service and make sure it all works – your Firewall might need to be told about changed program versions.
Set your GPS so that it only sends $GPRMC sentences only at 4800 baud. Too many sentences won’t allow one per second. This setting will depend on what your GPS receiver allows.
Attach your GPS to a free COM port, and note the COM port number (e.g. COM4).
Add a line to your ntpd.conf like:
server 127.127.20.4 minpoll 4 prefer # NMEA serial port
The fourth number in the IP-address like field (127.127.20.4) should be the COM port number – 4 in this example.
Connect your GPS to your PC, and follow any steps to remove the “Microsoft Serial BallPoint Mouse” which has appeared in the Device Manager – details http://www.gpsmap.net/GarminHints.html#GPSR_ComputerMouse
Reboot, and check that NTP is working correctly. An “ntpq -p” should include the line: *GPS_NMEA(4) where the port number is in brackets.
If running on Windows Vista or Windows-7, try setting the system environment variable NTPD_USE_INTERP_DANGEROUS = 1, restart NTP, and see whether it improves the timekeeping performance.
For 64-bit systems, where unsigned drivers are not allowed, see here: NTP on Vista and Windows-7
December 15, 2020 at 1:47 pm
pleasant data and great blog. thanks much for the article
December 15, 2020 at 5:36 pm
very goood.
We hope you evaluate our website specialized in designing home gardens.
http://landscaperaghad.blogspot.com/2020/03/tansekhdayek.html
December 15, 2020 at 5:36 pm
very goood.
We hope you evaluate our website specialized in designing home gardens.
landscaperaghad.blogspot.com/2020/03/tansekhdayek.html
December 16, 2020 at 3:16 pm
Teşekkür ediyorum Sayın yonetici sohbet odaları ile eğlenceli vakit geçirebilirsiniz
December 16, 2020 at 7:33 pm
Casinoroyal7 tempat daftar judi slot online terbaik yang mengedepankan sistem fairplay, deposit kilat dan pembayaran withdraw secara penuh yang hanya diberikan oleh agen slot terpercaya di Indonesia.
December 17, 2020 at 2:44 pm
We are an independent and faithful third-party tech support service provider who is not connected or associated with any of the companies and business until and unless such type of relationship is specified.
December 18, 2020 at 3:31 am
nice content what you sharing to us , come and ping back to us .
December 18, 2020 at 3:32 am
nice content what you sharing to us, thank you
December 18, 2020 at 7:03 pm
hasil togel terlengkap semua pasaran tersedia.
December 18, 2020 at 11:01 pm
It’s very well explained, thanks for sharing this content with us.
December 18, 2020 at 11:02 pm
It’s very well explained, thanks for sharing this content with us and this is very very useful for us.
December 19, 2020 at 8:51 pm
domino777 merupakan website andalan kalian untuk memenangkan banyak uang
December 19, 2020 at 11:43 pm
The ESPN channel offers live tv programmings also 24/7 live sporting series and full repeat telecast, sports news, clips and game trending highlights.
https://espncomactivate.co/
https://denialmart.medium.com/how-to-activate-espn-espn-on-roku-tv-727581674d
https://sites.google.com/view/espncomactivaterokutv/
https://sites.google.com/view/how-to-reactivate-espn-plus/home
https://sites.google.com/view/espn-plus-login/home
https://denialmart.medium.com/how-to-install-activate-roku-on-tv-activate-espn-on-roku-19d095d0203e
https://denialmart.medium.com/how-to-reactivate-espn-account-activate-espn-roku-15dcf8e11a7e
https://espncomactivate.blogspot.com/2020/12/how-to-activate-espn-on-roku-tv.html
December 22, 2020 at 12:09 am
Khasoft is a technology site that provides information on the latest updated driver software
December 22, 2020 at 5:57 pm
Bambang Sunarwibowo merupakan calon kapolri yang baru
December 23, 2020 at 2:15 am
Hand Stations is the best Nilaqua Hand Sanitiser selling website. you can buy the best affordable and discount price. hand stations 100% trusted website. you can busy Nilaqua Hand Sanitiser easily. we have a proud history of supplying quality products. Our first business, Hillside Hand Dryers, was founded in 2016 to supply and service for UK businesses.
Nilaqua Hand Sanitiser
December 23, 2020 at 7:06 am
Get exciting deal on your flight booking. Search your preferred destinations and get the best discounts on domestic and international flights.
JetBlue Airways manage booking
Do Hurry, Grab unbeatable Offers
Call for exclusive deals: 1-888-595-2181
Domestic | International | Flight Reservation Deals
#airlinesupports #ChristmasFlights #NewYearFlights #AirlineSale #FlightSale #domesticflight #international #Cheapflights #Lowairfare #BookFlight #Airline #Tickets #Airfare #Airlineticket #Sale #Discounts #Flight #flighttoUSA #FlighttoCanada #Europetour #Newyear
October 13, 2021 at 1:26 pm
Thanks for the info. send regards for success.
https://bit.ly/3u8iEJA
https://bit.ly/3lSMC0B
https://bit.ly/39Bmz8g
https://bit.ly/3ohLSVs
https://bit.ly/gantungankuncikaret
https://bit.ly/labelkaret