Comcast is a popular cable television service provider that requires a receiver box in order to view content. Typically, each television in your home needs its own receiver box to view channels; however, if you have televisions in two different rooms in your home but only own one Comcast cable receiver box, you can connect that box to both TVs using a coaxial cable splitter and coaxial cable. This allows the box to provide television content to both TVs.
Screw one end of a coaxial cable onto the "TV OUT" coaxial output on the back of your Comcast receiver box.
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Screw the other end of the same coaxial cable onto the "IN" input on your coaxial cable splitter.
Connect one coaxial cable to each of the two "OUT" outputs on your cable splitter.
Connect the opposite end of each of these two coaxial cables to the coaxial inputs on the back of your two television sets.