In many of these embodiments, an impact force measurement associated with a test of {TAIL ~ a moveable barrier operator} is obtained and an impact force signal representing {HEAD ~ the impact force measurement} is generated 
In many of these embodiments , an impact force measurement associated with a test of { TAIL ~ a moveable barrier operator } is obtained and an impact force signal representing { HEAD ~ the impact force measurement } is generated
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH