I have the 722K dvr receiver with the over the air antenna input. I want to be able to wire in a video camera to the over the air input. This can work as a surveillance camera that can record to the dvr and I can watch anywhere with the sling adapter. I think the tuner is only atsc therefore I would have to modulate the video out of my to a digital atsc channel. This is the part I am stuck on. Has anyone ever done anything like this?