{HEAD ~ The test unit} 40 is designed to determine {TAIL ~ the asymmetrical characteristics} of the readhead 29 
is designed to determine
{ HEAD ~ The test unit } 40 is designed to determine { TAIL ~ the asymmetrical characteristics } of the readhead 29
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH