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