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User name R. Michaels
Log entry time 09:42:40 on June13,2007
Entry number 205356
Followups:
keyword=S0 multiple TDC peaks
Alex and I worried about the multiple peaks on S0 TDC.
The "S0.rt" and "S0.lt" are, resp. S0A and S0B which are
plugged into discriminators. There happens to be signals
for "or of S1" and "or of S2" in the same discrim, nearest
to S0B (S0.lt), which we think causes crosstalk, leading
to the funny peaks. These are 1877 TDCs (0.5 nsec per bit).
Ths trigger T2 looks relatively clean.
Alex will try unplugging the S1-or, S2-or signals to see if
this helps. He is in opportunistic controlled access now.
FIGURE 1