More particularly, the invention relates to calibration of {HEAD ~ D.C. restoration level signals} that provide {TAIL ~ automatic offset control} of the signals from the array 
provide
More particularly , the invention relates to calibration of { HEAD ~ D.C. restoration level signals } that provide { TAIL ~ automatic offset control } of the signals from the array
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH