Using PTZ Optics 20x-IP with BlackMagic ATEM Studio 4k
Robert,

I too am thinking about buying this camera to use with my ATEM switcher. The ATEM can be quite finicky regarding compatibility. Have you tried it with straight SDI into the ATEM? If this does not work try adding a cheap sdi splitter from Kanex etc to the line.

The camera needs to be set to the exact right settings to work, for example 1080i. The PTX Optics manual says that "After changing the switch, you need to restart the camera to take effect"

You can check the compatibility of your Cat 6 conversion equipment at atemuser forum

and share your results.