The T-RAX chassis has a video backplane with a total of (16) BNC connectors in (2) rows supporting 3G-SDI, HD-SDI, and SD-SDI signals; for a diagram and additional information refer to page 2 of the T-RAX User Guide found in this article.
Video backplane input / output
The BNC connectors on the video backplane are not a physical cable pass through, and cannot function as a passive video distribution amplifier.
The following requirements must be met for video loop-through or video output to be present from a specific card slot:
- The T-RAX chassis must be connected to power.
- The T-RAX chassis and Controller Card must be turned on and fully booted.
- An Encoder or Decoder card must be installed in that card slot.
- The Encoder/Decoder card must be fully booted.
- The Encoder/Decoder card must be functioning normally -- if the card is in Recovery Mode or has had a firmware failure, no looped or decoded video output is expected from that card slot.
Card slot video loop-through vs. video output
The behavior of the BNC connectors for a card slot is determined by the type of card installed in the slot:
- If an Encoder card is installed, the top BNC connector is for video input, and the bottom BNC connector is a looped video output.
- If a Decoder card is installed, both top and bottom BNC connectors function as video outputs -- there is no loop-through video functionality on a Decoder card.