-The design concepts of modern data acquisition systems share many similar features. Among them are
-high bandwidth data transport, synchronization of front-ends and slow-control. This talk focuses
-on the achieved synergy in data acquisition networks between several experiments of the FAIR project
-and beyond. The TrbNet protocol developed for the upgrade of the HADES DAQ system is now also
-employed in various prototype set-ups for detectors of the CBM and PANDA experiments. Additionally,
-a modified implementation of the network is foreseen to be used for time synchronization and fast
-control system for the full PANDA detector setup.
+The design concepts of modern data acquisition systems share many
+similar features. Among them are high bandwidth data transport,
+synchronization of front-ends and slow-control. This talk focuses on the
+achieved synergy in data acquisition networks between several experiments of
+the FAIR project and beyond. The TrbNet protocol developed for the upgrade of
+the HADES DAQ system is now also employed in various prototype set-ups for
+detectors of the CBM and PANDA experiments. Additionally, a modified
+implementation of the network is foreseen to be used for time synchronization
+and as fast control system for the full PANDA detector setup.
-During the upgrade of the HADES experiment at GSI (Darmstadt, Germany) in the past years several new
-read-out electronics and data transportation developments were made. One part is the TrbNet data acquisition network protocol
-that allows for individual slow-control access to each front-end module and provides a convenient interface
-for trigger distribution and data read-out. A whole set of software for monitoring, control and
-data acquisition was designed on top and successfully used during an experimental run in 2012.
-The electronics developed for this upgrade are now in widespread use among several detector prototypes
-and experimental set-ups, e.g. for the CBM and PANDA experiments at FAIR. Here, the TrbNet protocol
-also serves as the read-out system.
-
-In this context it was a logical decision to also adapt the network protocol to the specific needs of these
-experiments. One important difference is the time distribution concept that foresees to remove the need for a
-dedicated timing signal and thereby reduce the amount of interconnection inside the system. The
-optical data transmission system can support the synchronization of all sub-systems of a detector
-on the order of nanoseconds. This can be achieved by implementing message with precisely
-defined propagation latency. In particular, it is vital to fix all delays
-introduced in the data transmission blocks on the transmitter and receiver sides. The length of the
-optical cable between two nodes can be evaluated by measuring the round-trip time of a datagram.
-The measuring precision of few nanoseconds with synchronous counters can be increased to below 100~ps
-using the well-established FPGA-based TDC technology.
-
-All features have been implemented in the universal TRB3 FPGA platform. We are going to present the
-implemented features with a focus on the synergy between experiments and show first measurements with synchronous networks.
+During the upgrade of the HADES experiment at GSI (Darmstadt, Germany) in the
+past years several new read-out electronics and data transportation
+developments were made. One part is the TrbNet data acquisition network
+protocol that allows for individual slow-control access to each front-end
+module and provides a convenient interface for trigger distribution and
+data read-out. A whole set of software for monitoring, control and data
+acquisition was designed on top and successfully used during an experimental
+run in 2012. The electronics developed for this upgrade are now in widespread
+use among several detector prototypes and experimental set-ups, e.g. for the CBM
+and PANDA experiments at FAIR. Here, the TrbNet protocol also serves as the
+read-out system.
+In this context it was a logical decision to also adapt the network protocol to
+the specific requirements of these experiments. One important difference is
+the time distribution concept that foresees to remove the need for a dedicated
+timing signal and thereby reduce the amount of interconnection inside the
+system. The optical data transmission system can support the synchronization
+of all sub-systems of a detector on the order of nanoseconds. This can be
+achieved by implementing message with precisely defined propagation latency. In
+particular, it is vital to fix all delays introduced in the data transmission
+blocks on the transmitter and receiver sides. The length of the optical cable
+between two nodes can be evaluated by measuring the round-trip time of a
+datagram. The measuring precision of few nanoseconds with synchronous counters
+can be increased to below 100~ps using the well-established FPGA-based TDC
+technology. Another difference of new DAQ systems is the free-running data
+read-out without central arbitration. Here, no changes to the TrbNet protocol
+are necessary since this mode is supported with few modifications of
+the configuration of the system.
+All features have been implemented in the universal TRB3 FPGA platform. We
+are going to present the implemented features with a focus on the synergy
+between experiments and show first measurements with synchronous networks.
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