You can easily connect multiple TV sets in your home to your digital cable package. How you do this depends on a number of factors: how many digital cable receiver boxes you have, and how many rooms are already wired for cable TV. These factors determine if and how you need to "split" the cable signal. Since the cable receiver box has its own digital converter, you won't need a separate converter for any analog TV sets.
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Check each room in the home and see if every room you want a TV in is wired for cable TV. If so, you can connect a receiver to a cable in each room. If not, you need a splitter for each room that isn't wired.
Connect the main cable line in the house to a coaxial splitter if needed. If you are connecting two receivers to this line, you only need a two-way splitter. For multiple receivers, you need a switch that usually has four output ports.
Attach each output port that you need on the splitter to coaxial cable and connect the cable's other end to the input port on the cable receiver, Use the highest quality RG-6 cable you can get, and take into account how long the cable must be to reach the room.
Connect the receive to the TV set. Depending on the port options for the receiver and TV, you can use HDMI, RCA component, S-video, RCA composite or coaxial cable.
Connect the cable receiver box to the main cable line in your home through the receiver's input port.
Attach another coaxial cable to the output port on the receiver. Connect the cable's other end to a two-way splitter or multi-port switch, depending on how many TVs you are connecting.
Link each TV set to the splitter or switch using however many coaxial cables and ports on the splitter/switch you need. The length of each cable can vary depending on the location of each TV.