The master processor includes means for generating {HEAD ~ a periodic pulse} which is detected by {TAIL ~ the slave processor} 
is detected by
The master processor includes means for generating { HEAD ~ a periodic pulse } which is detected by { TAIL ~ the slave processor }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL