¥The main struggle during
PR03 was the cross talk within and between twisted-pair cables, which was
discovered after observing ÒweirdÓ correlations between T0 counters installed
on opposite sides of the IR.
¥Andrei Sukhanov was able
to show that these correlations were due to cross talk between the two ribbon
cables that carry the individual T0 signals to the CH.
¥During the pp run,
correlations in the T0 ORs were discovered, despite the fact that these signals
arrived in the CH over Twinax cables.
These correlations were due to the twisted-pair cables between the patch
panel in the CH and the TDCs.