A minimum chip gain level prevents {HEAD ~ the output} of the camera system from becoming saturated by {TAIL ~ the time} the shutter gain is supposed to be active 
A minimum chip gain level prevents { HEAD ~ the output } of the camera system from becoming saturated by { TAIL ~ the time } the shutter gain is supposed to be active
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH