As total gain is increased beyond the user established maximum shutter gain value, {HEAD ~ the incremental change} in gain is performed in {TAIL ~ substantially the same gain step sizes} 
As total gain is increased beyond the user established maximum shutter gain value , { HEAD ~ the incremental change } in gain is performed in { TAIL ~ substantially the same gain step sizes }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL