The interpreter 30 may be digital logic circuitry that compares the states of the signals GH and GL or may be {HEAD ~ a microprocessor} that employs software routines to accomplish {TAIL ~ the same purpose} 
The interpreter 30 may be digital logic circuitry that compares the states of the signals GH and GL or may be { HEAD ~ a microprocessor } that employs software routines to accomplish { TAIL ~ the same purpose }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL