RF modulator

I have laid a RG6 cable between the TV point in the sitting room and TV point in the master bedroom during renovation earlier. I was thinking of using the cable to share cable signals from cable box via a splitter and the concept works well. However, I should have laid a composite cable or a component cable or hdmi cable that provide better video resolution, and also newer devices e.g. DVD players, cable boxes etc  does not comes with RF outputs. Now, I have no choice but to purchase a RF modulator that converts the composite audio and video signals to RF modulated signals that can be fed into the television’s aerial / coaxial connector. For now, I would either exchange the existing cable box with another one that has RF output, I guess I still have to purchase a RF modulator for the other devices.

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