\noindent For your orientation: usually the clock signal is on one end of the
68pin flat ribbon cable, while the timing trigger is on the fifth cable pair.
+\begin{figure}
+ \centering
+ \includegraphics[width=0.6\textwidth]{rich_trigger.png}
+ \caption[RICH trigger distribution]{View on typical RICH trigger
+ cabling, with standard adaptor}
+ \label{fig:richtrigger}
+\end{figure}