TRBv2: A Platform for Miscellaneous DAQ/TDC Tasks for HADES and FAIR-Experiments

The general-purpose trigger and readout board (TRBv2) with on-board DAQ functionality and extensibility through add on cards has been developed and was used successfully in two beamtimes in the year 2007. The functionality of the TRBv2, already roughly outlined in [1], is described in [2]. Several add on modules, which enhance the functionality/connectivity of the TRBv2, have been developed and commissioned. In this document the functionality of the add ons is described without going into detail of the application in the HADES-experiment, as they are mostly general purpose boards and also of interest for other experiments. The add on boards built are spanning the full range of medium bandwidth (32 times 250MBit/s) data combining, high bandwidth (2 GBit/s optical links) digital data switching, general purpose IO-boards [1] (LVTTL, LVDS, RS485) up to 96 channel analog to digital converters and 62 channel time and amplitude digitization of fast pulses. The TRBv2 provides as the common base the data transport, slow-control and power-supply for the different applications. Data transport to the add ons and (when applicable) to the FEE, and (optionally) in a high-speed and real-time network is done via a dedicated IP-core (TrbNet) protocol.