One of {TAIL ~ three AGC windows} can be selected through {HEAD ~ associated register} according to one embodiment of the present invention 
One of { TAIL ~ three AGC windows } can be selected through { HEAD ~ associated register } according to one embodiment of the present invention
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH