Reference and Video Mode Setup
The switcher supports both internal and external references. An external reference is provided by an external device to the switcher through the REF IN BNC on the frame. An internal reference is generated by the switcher and can be fed out to other devices.
The switcher automatically detects the reference signal and only shows the video modes that you can operate the switcher in that are supported for that reference format.
Note: When you set the switcher to a specific video format, XPression is also
set to that format.