For KaonLT, the kPulsePedestal values being returned for
  the helicity signal channels was 0 and 16380.  For SIDIS, the
  values for off and on are ~2000 and ~1400.  Made the default
  threshold 8000 instead of 1000.  Also added an optional parameter,
  "helicity_fadcthreshold" so that this threshold can be changed
  at run time.