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