Video Inputs
Video sources come into the switcher from the router matrix. Depending on how you want to use these video sources, or where they come from, you may want the switcher to pair them together, or associate an external device with them. Pairing two video sources together is usually used for an auto select key where an external device, such as a character generator, outputs both a key video and key alpha. Associating a video source with an external device allows special control over that device to become active when you select the source on a bus.
The switcher has access to every source from every blade in the router.
Note: In the router, Switcher Outputs are Sources for the slot the SDPE is installed in. These sources will show up on the switcher inputs list, but
should not be used for re-entry.