BigCal pedestals and thresholds in the ENGINE:

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User name puckett

Log entry time 18:52:03 on October 09, 2007

Entry number 142806

keyword=BigCal pedestals and thresholds in the ENGINE:

Now that pedestal events are incorporated into the main DAQ, I've been able to discover and fix the bugs in the pedestal event handling for BigCal in the engine, which now works properly. The ENGINE writes the new BigCal thresholds to 'peds/bigcal_thresholds.%d' (or whatever file is pointed to by b_threshold_output_filename), where %d is the run number. All (hardware) thresholds are equal to pedestal + 10 channels. Software thresholds depend on the width of the pedestal in that channel but are no smaller than 10 channels and no bigger than 20 channels in the default configuration. You can check which parameters were actually used by looking at the file 'peds/bigcal_pedestals.%d' (or the target of b_pedestal_output_filename). To update the hardware thresholds, you need to copy the ROC11 and ROC12 sections of bigcal_thresholds.%d into gep07/coda25/thresholds/roc11(12)_thresholds.dat

A copy of this log entry has been emailed to: jones@jlab.org, pentchev@jlab.org, perdrisa@jlab.org, punjabi@jlab.org