White Rabbit – sub-nanosecond synchronization for large distributed systems

# White Rabbit Source: [https://ohwr.org/projects/white-rabbit/](https://ohwr.org/projects/white-rabbit/) White Rabbit provides**sub\-nanosecond accuracy**and picoseconds precision of**synchronization**for large distributed systems\. It also allows for deterministic and reliable data delivery\. White Rabbit allows you to**precision time\-tag measured data**and lets you trigger data taking in large installations while at the same time using the same**network to transmit data**\. - sub\-nanosecond synchronization - connecting thousands of nodes - typical distances of 10 km between nodes - Ethernet\-based gigabit rate reliable data transfer - fully open hardware, firmware and software - multi\-vendor commercially produced hardware ### Contact [Maciej Lipinski](mailto:[email protected]) ### Tags [Documentation](https://ohwr.org/?f=Documentation)[White Rabbit](https://ohwr.org/?f=White+Rabbit) ### Latest News #### [Job opportunity at CERN: FPGA developer](https://ohwr.org/news/white-rabbit-66/) Feb 9, 2026 CERN is looking to recruit an FPGA and hardware designer to work on White Rabbit switch v4\. The opening is in the frame of the CERN Experienced Graduates Opportunities\. Anyone interested is very welcome to apply and if you have questions don’t hesitate to contact us\! #### [Job opportunity at CERN: FPGA developer](https://ohwr.org/news/white-rabbit-65/) May 5, 2025 CERN is looking to recruit an FPGA developer to work on the WR Technology and other exciting projects\. The opening is in the frame of the CERN Experienced Graduates Opportunities\. Anyone interested is very welcome to apply and if you have questions don’t hesitate to contact us\! #### [Job vacancy at CERN to work on White Rabbit and RF](https://ohwr.org/news/white-rabbit-64/) Sep 25, 2024 We have an open position at CERN to work for 2\-3 years on the evolution of the eRTM board\. It is a WR node whose jitter \(integrated between 100Hz and 20MHz\) is less than 100 femtoseconds, the most precise WR node I know of, originally designed by Mattia Rizzi and Tomasz Włostowski\.