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FS4 Frame Synchronizer/Converter v1.1
Ref Loop
The Reference Loop BNCs accept an Output timing reference signal. The reference can be
analog SD blackburst or HD tri-level sync. Examples of permissible reference video input
signals:
• 525 Color Black
• 625 Color Black
• 1080i Tri-level Sync
• 720p Tri-level Sync
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.