OK, I tried Chris' suggestion: turning off all my connected PC's, the router, the DVR. They I turned the router back on, left everything else off, turned the DVR on and tried to get it to connect. Again, like before, no connection.

radtek -

The installers did not install or leave behind any such device. All I have is one RG6 cable going to a three way splitter from the dish. From the splitter, all three RG6 cables are home ran to the three satellite receivers. I'm not sure I understand what this device is. Is it a powerline adapter or do you have a hard cable running directly from your router to the satellite dish?