Things You'll Need
Instructions
Install the TV tuner card into your PC. Installation instructions vary by PC and tuner type. Refer to your manual.
Connect a coaxial cable to the TV tuner card.
Connect your Xbox to your home network through the Ethernet port on the back of the console. The Ethernet port is used for both wired and wireless connections, as the Microsoft Wireless-G Xbox Adapter connects to the game console via the Ethernet port. Make sure your Media Center PC is also attached (wired or wireless) to the network.
Connect the Xbox Media Center Extender to your Xbox and insert the Media Center Extender Xbox disc. Upon turning on the console, you will receive a message with a setup code. Write this code down for reference.
Go to your PC and insert the Media Center Extender DVD into your DVD drive. Follow the instructions and continue until it asks for the set-up key.
Type in the set-up key. After typing in the code, the PC will connect to the Xbox.
Go back to the Xbox and you will have Windows Media Center on the screen. Select "My TV" from the menu, then choose "Live TV" to start streaming live television on your Xbox.