Hi john,
the missing cerenkov pedestal had to do with a small positive offset out of
the analog adder (2-5 mV). In these plots you can see the C adc before (cer_noffs.ps)
and after the correction (cerf.ps, cer_ped.ps). All pedestals are between channel 100
and 300 of the ADC now and we can start gain matching. It would be nice to see whether
we can live with any little negative offset in just for "safety" (of course we don't
want to run out of adc range..)
-- tancredi
________________________________________________________________________________
Tancredi Botto, phone: +1-617-253-9204 fax: +1-617-253-9599
research scientist MIT/Bates, 21 Manning Av Middleton MA, 01949
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