A pseudo tracking servo output signal is generated according to {TAIL ~ the simulation parameters} of {HEAD ~ the tracking servo output signal} 
A pseudo tracking servo output signal is generated according to { TAIL ~ the simulation parameters } of { HEAD ~ the tracking servo output signal }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD