AJA FS2 - Manual (Page 37)

1
37 FS2 Installation and Operation Manual — Connector Descriptions
The 2 BNCs are a passive loop: one BNC is for the Input, and the remaining BNC
can be connected to another piece of equipment in the reference chain or
terminated.
Note: For proper operation the input Reference signal must be stable and
properly terminated using a 75-ohm terminator on either the unused loop
connector or the last piece of downstream equipment to which the Ref Video is
connected.
About Inputs and
Outputs To operate the FS2, first select an Output Video Format (In the Video 1 or 2 menu);
then select an Input port. The FS2 will automatically determine the selected input
video format and convert it (if necessary) to the selected Output Video Format.
Any Video or Audio Input can be selected by either Processor 1 or Processor 2, and
either processor’s output can be sent to any output port.
The composite Video Output has a dedicated Downconverter so it can always
display an output even if it is selected to output an AV Processor that is set to
output HD.