A Slingbox allows you to re-broadcast your television signal so that you can watch it anywhere you can access the Internet. Its use is not strictly limited to cable television, but it does require a device to supply it with television programming. Generally speaking, anything that plugs into your television and provides you with content, recorded or streaming, can also be run through your Slingbox.
Plug your audio/video cable into the color-coded input ports on the rear of your Slingbox. Then plug that A/V cable into the corresponding output ports of your A/V source. Be sure all connections are firmly seated.
Plug your Cat5 network cable into the Ethernet port on the rear of your Slingbox. The cable will resemble a thick phone cord, and the port looks exactly like a telephone wall socket. The other end of this cable should plug into a router or router/modem combination to allow your Slingbox to transmit on-line.
Set the remote control IR sensor on top of your A/V source such that it sits securely and is pointed at the IR receiver for the remote control. Then plug the other end snugly into the back of your Slingbox.
Power your Slingbox on by plugging it into the wall with the included wall adapter. Check that the front lights on the Slingbox come on and stay on to be sure it's properly powered on and working.
Navigate your computer's Web browser to "www.slingbox.com/getstarted" to finish the registration and activation of your Slingbox. This site will guide you step by step through the entire setup process. Have your account info and Slingbox on hand for this step as these may be required for activation.