Abstract :
An electronic board, called floor control module (FCM), was developed for NEMO project, an underwater neutrino telescope. The offshore FCM is in charge of providing interfaces toward instrumental control boards, collecting data from up to 8 readout electronics, packing and sending streams to the onshore laboratory through an optical fiber driven by a DWDM electro-optical transceiver. To obtain a common timing at each level of the apparatus, communication adopts an SDH protocol, a standard telecommunication synchronous format which allows clock recovery from bitstream, thus simplifying the distribution network. The channel is fully bidirectional to allow underwater apparatus control. The same FCM, plugged into a PCI bus, can also be used onshore for data reception and transmission, providing a complete real-time data transport architecture between the onshore laboratory and the underwater electronics
Keywords :
electro-optical devices; oceanographic equipment; physical instrumentation control; protocols; readout electronics; transceivers; underwater equipment; wavelength division multiplexing; NEMO floor control module; NEMO project; SDH protocol; data reception; data transmission; dense wavelength division multiplexing; distribution network; electro-optical transceiver; electronic board; instrumental control board; onshore laboratory; optical fiber; real-time data transport architecture; synchronous digital hierarchy; underwater apparatus control; underwater neutrino telescope; underwater readout electronics; Communication system control; Instruments; Laboratories; Neutrino sources; Optical control; Optical fibers; Readout electronics; Telecommunication control; Telescopes; Wavelength division multiplexing;
