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User name choi
Log entry time 23:18:56 on January 6,2003
Entry number 90649
This entry is a followup to: 90646
keyword=No problem with helicity signal
The earlier report on bad helicity signal has been traced back to incorrect operation of the oscilloscope that we used. With proper DC coupling, helicity signal looks fine. So the problem with espace not seeing any helicity signal still remains. Xiaodong suggested that high rate/high dead time run may ruin helicity signals. I have replayed a run taken in the evening with low dead time and still finds most of the helicity at -10 and few at 0.