Satellite and Analogue

I have bought a triplexer socket for my front room so that I can receive satellite, tv and FM signals. The triplexer unit only needs a single cable in.
This means I need to install the gadget (probably in my loft) that receives sat, TV and FM signals separately (3 inputs) and sends the combined signal down a single cable (1 output) to the triplexer unit. What is the gadget called and where can I buy one?
Cheers
Mark
This means I need to install the gadget (probably in my loft) that receives sat, TV and FM signals separately (3 inputs) and sends the combined signal down a single cable (1 output) to the triplexer unit. What is the gadget called and where can I buy one?
Cheers
Mark