If the periodic pulse is not detected by the slave processor, the slave processor disables the output of {TAIL ~ the master processor} wherein {HEAD ~ the output} of the slave processor becomes enabled 
If the periodic pulse is not detected by the slave processor , the slave processor disables the output of { TAIL ~ the master processor } wherein { HEAD ~ the output } of the slave processor becomes enabled
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH