User name V. Sulkosky
Log entry time 11:59:49 on October20,2007
Entry number 209250
This entry is a followup to: 209154
keyword=S1 ADC Channel Swap Fixed (RHRS)I traced the S1 left/right ADC channel swap to the S1 database. The
HV and signal cables are correctly connected in the detector hut. In
the S1 database the ADC channels were swapped between the left and
right PMTs. Hence the analyzer referred to the left ADC channels as
the right and vice-versa. I've corrected this problem and checked to
make sure when I change the HV on S1-1L PMT, I see a change in the
correct ADC channel plot.
The TDC signals were not swapped. Figure 1 shows the right HRS S1
ADC spectra after the database was corrected.
Here is the corrected map as formatted in the S1 database.
Crate Slot 1st Last Beg Module ADC Channel Map ----------------------------------------------------------------------
1 25 6 9 1 1881 - ADCs pads 1-4 (right)
1 25 48 48 5 1881 - ADCs pads 5 (right)
1 25 11 11 6 1881 - ADCs pads 6 (right)
1 25 0 5 7 1881 - ADCs pads 7-12 (left)
2 16 56 61 1 1875 - TDCs pads 1-6 (right)
2 16 48 53 7 1875 - TDCs pads 7-12 (left)
where,
1st: first ADC channel for left or right PMTs
Last: last ADC channel for left or right PMTs
Beg: beginning ADC channel for the detector
FIGURE 1
