User name Jack
Log entry time 16:16:48 on January24,2002
Entry number 80573
Bob Michaels looked at the raw event data and noted the TDC in slot 18 of the
Fastbus crate was the one with the noise. This is the card with the high
momentum wires in it. Specifically, all the hits were coming on the first card
of that TDC, the card on the high momentum end of the upper VDC plane V.
It appears there is a break in the trace carrying the threshold voltage. The break
seems to be under the power connector. I ran a wire from the threshold bus trace
directly to the LeCroy card. Things seem stable. So, things were slowed down by
our confusion about which channels in dataspy correspond to which physical
wires of the VDC.