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The TV is a newer smart TV, with HDMI and Antenna inputs. The whole point here is to reuse the existing COAX wire to get to the other side.. running any new wire will be an issue, we are trying to avoid just that.

The COAX wire is the only one available (already existing) in the house going from the DVR room to the big TV where they want to see the cameras. So i need to reuse that wire. Could you suggest any solution then? why this wouldn't work, what is the purpose of the adapter ? Which one do i need? Thank you

Ok i upgraded an analog camera set and i need to connect the new DVR to the TV as a monitor. Here is the map: New DVR XVR HDMI out 1080 BNC connector <----> 50FT COAX wire <----->regular F-type coax connector TV with regular antenna input DVR is THIS So i believe what i need is one of THESE (HDMI to SDI Converter) I am not an expert whatsoever, just helping a friend with his home setup. Please let me know if this is the adapter i need or should look for something different. Thank you very much