You're trying to use hardware that you don't have on your home network.
To watch live streams of TV channels, check the various add-ons found in XBMC's Video>Add-ons menu.
PVR refers to plugging in your cable TV, TV aerial or satellite dish lead into a card or external device that then allows you to watch TV without the internet. Unless you have one of these devices in a PC or other computer at home somewhere, don't touch the Live TV/PVR entries in XBMC. If you find you've enabled some PVR add-ons, then visit
How Can I Disable Or Remove Add-Ons In XBMC and check how to disable them again.