errors are generated differently in short distance digital parallel optical links
and in long-haul
single fibre (PTT) transmissions.
in PTT-type applications the detected light signals are sometimes so small that
can cause bit-errors, at CERN, parallel transmission signals remain always (exept
failure) sufficiently large. Errors are mainly generated by skew problems at high
•However, we tried to give
a basic estimation of BER under possible working conditions at CERN: