Event Builder and Online-Farm

The data from each subsystem are transferred through optical-cables. The data are received and converted to the ECL signals at B3 online room by using the Opt-ECL module which is developed by KEK electronics group. The Opt-ECL module is black module in the left-hand side of this photo. The converted ECL signals are sent to the receiver module (Rx) placed in the Online-Farm crate (right-hand side) through G-link cable (brown cable).