I've been using the device in conjunction with the Sagecom cable Digittal Reciever of cable Germany, an LG 760S LED TV, and an Xbox One.
The wiring is as follows:
The Receiver will be connected to the input, the TV and the Xbox One to a respective output.
I wanted to use the Xbox One TV function and look during the game or Skype TV. This also works without the device. As soon as I but the Xbox One is no longer used but still wanted to watch TV, I had to reposition always, that is in the long run not good for the connections and cumbersome, it is even.
With the current, new setup I can both watch TV on my Xbox without while I'm playing, and if the Xbox is turned on TV.
The routing of the signals via the splitter works perfectly, so far I could not detect any interference to image. (Programs used: Pro 7 HD, Pro 7 Maxx, TNT HD, etc., all rendered from the Receiver at 720p.)
All Top! I recommend it to anyone who wants to follow the way the current program on his Xbox and do not want to start his 24/7 Xbox One!