I am using a 5v remote control system over the RG6 RF coax cable to remotely control the Sky STB and DVD player.

I have the IR targets, which connect 'in-line' to the coax cable, at the remote TV end.

What I need is a device that 'drives' these targets and produces the IR signal to the emitters placed in front of the Sky STB and DVD player. At present I use a Hills Distribution Amp/Splitter, but I want to do away with this as it is causing interference on some channels.

So all I need is a device that plugs 'in-line' to the coax, after the RF Out on the Sky STB, that inserts 5v into the coax and has some electronics to receive the signal from the remote IR targets and send to IR emitters. Even if there is no device I can buy, does anyone have a circuit diagram of such a thing so I could make up my own.

Thanks