Figure 3:a: Difference for all events of the time of the PST triggerand the Multiplicity trigger with the trigger fraction being 33% (MULT3).Notice the erroneous triggers due to the low trigger fraction. b: Difference for all events of the time of the PST triggerand the Multiplicity trigger with the trigger fraction being 66% (MULT6).Notice that the erroneous triggers are no longer created. See Section 4 for anexplanation of the differences in widths of the two distributions.
\begin{figure}\begin{center}\mbox{\epsfysize=0.75\textheight\epsfbox{trigger3.eps} }\end{center}\end{figure}