Summary 500 words
The ARA group at the Université Libre de Bruxelles has been developing a system by which clock, data, and power may be distributed via twisted pair CAT5E/CAT6 networking cables of length up to 250 m. The intended target of this technology development is the remote ARA station which incorporates 16 antennas deployed up to 200 m deep in the ice. While the system currently uses RF analog optical signal transmission, in the future the group is interested to reduce cost, power, and deployment complexity by moving the digitizer local to the antenna system. This requires a digital data link capable of transmitting antenna triggers firing in excess of 1 MHz and clock synchronization between the various down-hole digitizers to a precision of 50 ps in order to cross-correlate captured waveforms from the array of antennas. We achieve these goals using a circuit built from COTS components.