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 9, 2023 at 1:08 am
nice post i like it
November 9, 2023 at 1:36 am
Live Draw Macau
November 9, 2023 at 1:37 am
Mari saksikan Live Draw Macautercepat di situs kami
November 9, 2023 at 7:26 am
Nikmati koleksi game online terlengkap dengan tambang888
November 11, 2023 at 12:13 am
great post . MOFA Attestation Dubai
November 11, 2023 at 12:52 am
Get expert assistance in setting up your business in Dubai & UAE with ease. Our website offers comprehensive solutions for company formation, registration, visa and license services. Start your entrepreneurial journey today! Business Setup Services in Dubai
November 11, 2023 at 12:52 am
Great Thing Get expert assistance in setting up your business in Dubai & UAE with ease. Our website offers comprehensive solutions for company formation, registration, visa and license services. Start your entrepreneurial journey today! Business Setup Services in Dubai
November 11, 2023 at 11:10 am
kaisar888 kami menawarkan berbagai pilihan permainan online terbaik yang dirancang untuk memberikan sensasi luar biasa
November 12, 2023 at 12:29 am
خدمات دوربین مداربسته در اثفهان، فروش عمده دوربین مداربسته
November 12, 2023 at 12:29 am
خدمات دوربین مداربسته در اثفهان، فروش عمده دوربین مداربسته
خدمات دوربین مداربسته فروش عمده دوربین مداربسته
November 12, 2023 at 12:30 am
خدمات دوربین مداربسته فروش عمده دوربین مداربسته
November 13, 2023 at 12:17 pm
نفیس مس زنجان : فروشگاه ظروف مسی
November 13, 2023 at 12:17 pm
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:
November 14, 2023 at 1:51 am
This article is a great starting point for those new to the topic. It provides a clear overview and introduction.
November 14, 2023 at 3:02 am
Bandar 4dprizewlatoto terbaik
November 14, 2023 at 4:58 am
Emirates’ Manage Booking services provide convenience with user-friendly features. Easy modifications and seamless itinerary updates make travel planning stress-free. A reliable tool for hassle-free journeys
November 14, 2023 at 5:09 am
Emirates Airlines always exceeds expectations with its unparalleled service, luxurious amenities, and a commitment to passenger comfort. From exquisite in-flight dining to cutting-edge entertainment, every journey becomes a memorable experience. #Emirates #TravelLuxury ✈️🌍
November 15, 2023 at 8:25 am
qqmobil Agen permainan online resmi terpercaya sehingga kemenangan berapa pun pasti langsung dibayar
November 15, 2023 at 7:56 pm
berlian888 slot adalah perusahaan game online nomor satu di Asia
November 16, 2023 at 8:15 pm
this is very interesting journal, so i want to give my website in here: Rajapola.
November 17, 2023 at 12:24 am
Nice article. I haven’t read anything like this in a very long time.
zoho amazon integration
November 17, 2023 at 1:35 am
Pastikan bahwa aplikasi menggunakan sertifikat SSL/TLS yang valid dan terpercaya untuk melindungi data selama proses transmisi. Sertifikat SSL/TLS yang kuat membantu mencegah serangan MitM.
November 17, 2023 at 7:34 am
Awl Souvenir menyediakan Souvenir Bogor dengan berbagai model Souvenir Pernikahan yang menarik dan unik.
November 21, 2023 at 1:20 am
https://myangelsbangalore.com/
Bangalore Call Girls – We have been pioneers in the industry of Call Girls. So if you people have been always looking for India’s best Call Girls in Bangalore then you have arrived at an excellent place where you would get a pretty cute and chubby list of call girls who are eager to meet you in your private place.
November 21, 2023 at 2:27 am
Sedayu Pool adalah mitra dari PT TRIJAYA POOL INDONESIA yang menyediakan layanan kontraktor kolam renang yang mengerjakan jasa pembuatan kolam renang, jasa renovasi kolam renang, hingga jasa perawatan kolam renang. Kami memiliki tenaga kerja profesional, berpengalaman dan terpecaya.
November 22, 2023 at 1:56 am
Data HK
November 22, 2023 at 9:00 pm
Neraka4d
November 24, 2023 at 4:56 am
https://www.safewalkchennai.com/
call girls in Chennai
Being one of the main Indian escort Service,
we energetically welcome all Indian and International guests to get in touch with us,
if they look for the most. It is our responsibility that we will make a superb association for you call girls in chennai
November 26, 2023 at 3:03 am
Data SDY 2024
November 27, 2023 at 1:05 am
thanks for your good website
November 28, 2023 at 1:39 am
thanks so much for your blog. this my link alternatif: Victory88
November 28, 2023 at 9:38 pm
Create and use a special NTP account.
November 28, 2023 at 11:41 pm
coin qq slot adalah agen situs game taruhan terlengkap dengan berbagai macam permainan yang menarik yang bisa kalian mainkan dengan senang dan dapatkan hadiahnyaaaaaaaa!!
November 29, 2023 at 11:40 pm
1xbetRegister and get a 120% bonus up to 396 USD on your 1st deposit! … The more bets you place, the larger your free bet amount!.Having entered the Promo Code 1XBET3967 during your registration,1xbet you get the 1xBet. 1xBet app has developed several modern and convenient mobile applications that can be downloaded and installed for free.
November 30, 2023 at 9:16 pm
Artikel yang sangat bagus
jual chiller container
November 30, 2023 at 9:45 pm
Really nice article
Roller Blind
November 30, 2023 at 9:51 pm
I really like your article
jasa insulasi pipa
December 5, 2023 at 1:24 pm
الموقع الناجح هو موقع رائد في خدمات سيو مواقع وتصميم مواقع الانترنت. تضم خدماته العديد من المجالات التي ترقى بالموقع الالكتروني لأعلى المراتب مثل: تحسين محركات البحث SEO وتحسين تجربة المستخدم UX وبناء الروابط الخارجية Backlinks. تأمين الاستضافات والاشراف الكامل على الموقع والدوارات التدريبية.
December 6, 2023 at 2:32 am
hey there, enjoyed by this novelty of your writing and saved it
December 7, 2023 at 11:29 pm
Mekar77 leverages state-of-the-art technology, including cutting-edge graphics engines, virtual reality (VR) integration, and artificial intelligence (AI) to create games that not only look stunning but also provide a level of realism and engagement that sets us apart.
December 8, 2023 at 5:36 am
Every computer motherboard includes an internal clock that continues to run on a battery even when the computer is switched off. For any operating system that is installed, this clock is the default time source. Unfortunately, motherboard clocks are anything but accurate and may drift by as much as several minutes a day. In some cases the only option may be to regularly reset the clock manually, but that is a crude and labor-intensive solution prone to human error. A far more efficient solution is to permanently synchronize every computer on a network to one or more accurate and reliable time sources.
One way to achieve this is to synchronize to a few of the many Network Time Protocol (NTP) servers available on the Internet. This is a popular solution that is definitely better than having no automatic time correction at all, but it also has certain drawbacks. First of all, most Internet links are also heavily used for other purposes; this inflicts varying delay times on NTP traffic, leading to decreased accuracy. Second, NTP was designed for use with symmetric network links, so those with typically asymmetric broadband connections (e.g. ADSL) can never achieve optimal results. bodrum evden eve nakliyat , bodrum araç kiralama
December 9, 2023 at 1:03 am
xcellent post. I was checking continuously this blog
and I’m impressed! Extremely helpful information specially the
last part 🙂 I care for such info much. I was seeking this certain information for a long time. Thank you and good luck. I am very interested in the information you have provided. Please visit the my website
December 12, 2023 at 7:39 am
deeplsport Hottest Sports News from Around the World with in-depth analysis, features, photos and videos covering football, tennis, motorsport, golf, rugby, sailing
December 13, 2023 at 6:47 am
Aurogra 100mg is not intended for use by women or individuals under the age of 18. It should not be used recreationally or without a valid prescription.
December 16, 2023 at 8:29 am
White House Premier adalah pengembang perusahaan properti yang mempunyai komitmen dan loyalitas terhadap mitra klient dalam mewujudkan suatu kawasan permukiman yang tertata rapih, indah, aman dan nyaman yang berkelanjutan, ramah lingkungan dengan performa kualitas bangunan yang sangat baik
December 17, 2023 at 9:30 pm
what time is it? this is Megabet time!
http://159.65.196.83
December 17, 2023 at 9:31 pm
what time is it? this is Megabet time!!!
http://159.65.196.83
December 17, 2023 at 9:32 pm
what time is it? this is Megabet time!!! GOO
http://159.65.196.83
December 19, 2023 at 2:27 am
the most trusted slot online with slot gacor games
December 19, 2023 at 3:36 am
Very informative article it seems like all the knowledge of whole world are