{HEAD ~ Data} obtained by {TAIL ~ the sensor} 20 is appropriately clocked out of the sensor and transferred to other electronic circuits of the scanner 
obtained by
{ HEAD ~ Data } obtained by { TAIL ~ the sensor } 20 is appropriately clocked out of the sensor and transferred to other electronic circuits of the scanner
HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH