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.

  These signals are plus and minus signals, the MPS indicator, and
  the start of quartet indicator.  The time from the TI (with overflow
  detection) is also retrieved as this is needed when dealing with
  delayed helicity reporting.

  The helicity signals are in FADC250 channels.  The roc/slot/channel
  assignments for these signals are currently hardwired into the code.