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    • RELIABILITY IN A WHITE RABBIT NETWORK

      Autors: Maciej Lipinski, Javier Serrano, Tomasz Włostowski, CERN, Geneva, SwitzerlandCesar Prados, GSI, Darmstadt, Germany Abstract: White Rabbit (WR) is a time-deterministic, low-latency Ethernet-based network which enables transparent, subns accuracy timing distribution. It is being developed to replace the General Machine Timing (GMT) system currently used at CERN and will become the foundation for the control…

    • White-Rabbit-enabled Data Acquisition System

      Authors: José López-Jiménez, Miguel Jiménez-López, Javier Díaz – University of Granada, Granada, SpainJosé Luis Gutiérrez-Rivas – Seven Solutions, Granada, Spain Abstract: This work examines the feasibility of using Ethernet-based time transfer methods based on White Rabbit technology to discipline all the clock domains of a networked data acquisition system (DAQ). Existing systems provide synchronization capabilities,…

    • White Rabbit-Based Time Distribution at NIST

      Authors: J. Savory, J. Sherman, and S. Romisch – Time and Frequency Division, National Institute of Standards and Technology, Boulder, CO 80305 Abstract: The National Institute of Standards and Technology (NIST) produces a real-time realization of UTC(NIST) which is used to contribute to Coordinated Universal Time (UTC) and as a source for accurate time in…

    • White Rabbit: a PTP Application for Robust Sub-nanosecond Synchronization

      Authors: Maciej Lipinski, Tomasz Włostowski, Javier Serrano, Pablo Alvarez – CERN, Geneva Abstract: This article describes time distribution in a White Rabbit Network. We start by presenting a short overview of the White Rabbit project explaining its requirements to highlight the importance of the timing aspects of the system. We then introduce the technologies used…

    • Ultra-accurate Ethernet Time-Transfer with programmable carrier-frequency based on White Rabbit solution

      Authors: Francisco Girela-López, Felipe Torres-González, Javier Díaz Abstract: Synchronization has become a main concern in communication and control systems during the last years. Although there are several standard mechanisms to accomplish timing requirements, development and improvement of high synchronization technologies is required to obtain better performance and quality of service. In this context, the enhanced…

    • High Accuracy Synchronization for Distributed Massive MIMO using White Rabbit

      Authors: Thomas Bigler, Albert Treytl, David Loschenbrand, Thomas Zemen Abstract: Accurate synchronization is a crucial prerequisite for wireless communication systems and in particular for spatially distributed massive multiple-input multiple-output (MIMO) systems which is also used in the upcoming 5G mobile communication standard. Many applications based on MIMO transmission, such as communication systems or beamforming methods,…

    • 10 Gigabit White Rabbit: Sub-Nanosecond Timing and Data Distribution

      Authors: Miguel Jiménez-López; Francisco Girela-López; Jose López-Jiménez; Emilio Marín-López; Rafael Rodríguez; Javier Díaz Abstract: Time synchronization is a critical feature for many scientific facilities and industrial infrastructures. The required performance is progressively increasing everyday, for instance, few tens of nanoseconds for Fifth Generation (5G) networks or sub-nanosecond accuracy on next family of particle accelerators and…

    • WR Trigger Distribution for distributed oscilloscope (CERN)

      WR Trigger Distribution allows for spacial distribution between the source of a trigger and the location at which an input signal is observed. At CERN, many analogue signals coming from accelerators are digitized to allow for their monitoring. Signals coming from different parts of the machines must be correlated and can be sources of triggers.…

    • RF over WR to control accelerating cavities (CERN)

      RF over WR allows real-time transmission of frequency tuning words over a WR network. These control words are then used to synthesize phase-aligned radio-frequency (RF) signals in different locations. These RF signals drive accelerating cavities in the Super Proton Synchrotron (SPS) at CERN. In this system, WR is used to distribute the base phase-aligned WR…

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    Link to the user manual on OHWR: wrs-user-manual-v6.1.pdf

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