The interrupt might be, for example, {TAIL ~ an extended change} of {HEAD ~ state} of the antenna or a sequence of bits that otherwise does not occur in normal communications messages  
The interrupt might be , for example , { TAIL ~ an extended change } of { HEAD ~ state } of the antenna or a sequence of bits that otherwise does not occur in normal communications messages
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH