There are many reasons to connect your satellite receiver directly to your PC, a primary one being to record television shows, movies and other programs onto your hard drive. Saving movies and programs you watch only occasionally to hard drive also can save space on your DVR.
Locate the RCA "Audio/Video Output" ports on the back of your satellite receiver--three round ports, colour-coded yellow, red and white. Insert one end of your RCA audio/video cables into these ports, making sure to respect the colour-coding.
Insert the other ends of the wires into the "Analog In" ports on your Canopus box, again paying attention to the colour-coding.
Insert one end of your FireWire into the "Digital I/O" port of the Canopus box. Plug the other end into the FireWire or 1394 port on your computer.
Set the Canopus box to "Analog In," so it will receive a signal from the satellite box and send it to your PC.
If your computer does not have a FireWire or 1394 port, it's relatively easy to install a PC card (or similar) in your laptop that will give you the additional ports. You can do the same for your desktop, but it is more complicated.