{HEAD ~ The exciting pulses} are of {TAIL ~ similar magnitude} and timing as that of the signal field generated by the slip drive stepper motor 
are of
{ HEAD ~ The exciting pulses } are of { TAIL ~ similar magnitude } and timing as that of the signal field generated by the slip drive stepper motor
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH