The number of non coherent passes defines the number of times the search engine steps through {HEAD ~ the PN offsets} designated by {TAIL ~ the search window} 
designated by
The number of non coherent passes defines the number of times the search engine steps through { HEAD ~ the PN offsets } designated by { TAIL ~ the search window }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL