{TAIL ~ The jittering test signal} is used to test {HEAD ~ equipment} to determine the effect of the jittering signal on the equipment 
{ TAIL ~ The jittering test signal } is used to test { HEAD ~ equipment } to determine the effect of the jittering signal on the equipment
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH