Grass Valley Trinix v.2.4.1 - Manual (Page 128)

Installation
128 Planning and Installation Manual
Figure 65. Location of gain jumpers on SO-33110/33011 and HO-33110/33011 output boards.
SO-33011 MEZZANINE (UPPER NUMBERS)
SO-33110 BASE (LOWER NUMBERS)
HO-33011 MEZZANINE (UPPER NUMBERS)
Pin 1
HO-33110 BASE (LOWER NUMBERS)
Note labelling error:
"BOOST*" = Expand Enable
"BOOST_REF" = Force Normal