Thank you! I'll look into the blackmagic convertor.
We also have this modulator (see image attached) that was used previously with a different camera.
A video cable used a BNC Male to RCA Female Adapter to plug into the SDI port on the camera then plugged into this modulator.
The TV still received no video signal with this. It did receive audio through the modulator using this RCA audio cable that plugged directly into a wireless mic receiver.
Is there something I'm doing wrong here where a previous camera had provided video to the TV?
Thanks again,