My wife finally said it was ok to get a 4k tv. We went to BestBuy and bought a new Samsung. Put it in the back of my truck and brought it home. Got to looking at my Yamaha AVR and realized it would not do 4k. Went to the internet to find a replacement. $3200 later I am the proud owner of a new SR8015 Marantz. Ordered a new ROKU and a new center channel speaker. Meanwhile I call DTV to find out what I need to do get set up. She said I had to have a service call to install the C16K-700. The guy comes to my door and I am not ready to tear into my set up yet because my AVR hasn't arrived nor has my wall mount. He comes in and I tell him he can just leave the small box with me and I would install it myself. He looked like a kid on Christmas. He left me the box and the power cord. My stuff has all arrived and I am now looking at the back of this box and realize I don't know what an SVM network is. Back to the internet and I assume it is the cable that comes through my wall. My question is this, I only have one cable coming into my house going to my DTV rec. I think it is an HR54. Do i just split the cable and have one end go to each of the DTV boxes? All your help would be appreciated!