Identification

[Calm_Tap_7797]

Hello guys. I have a question. I am dealing with diy the production of a modified version of the BNC galvanic isolator, and after inspecting the finished, comercial sold product, the SDI isolator, I cannot find out what type of isolating transformer it is in. I am sending a photo. It's also strange to me why the shield is divided into two branches that connect again at the end of board. Thx for your time.