I have a co-ax cable coming from my aerial and I have two Micromark
cctv cameras that feed into a modulator which outputs at channel 38.
What I would like to do is get the cctv feed up to the loft so it can
then be split around the various TVs in the house so I can view the
cctv output on all of them. The modulator output channel is away from
any of the aerial TV output channels.

Is there anyway of economically combining two coax cables (one from the
aerial and the other from the modulator) which would then go into the
booster to be sent to each of the other TVs?

I know I could run both of the Din cables up to the loft and put the
cctv control unit and modulator there but it would be easier if I could
take the signal up via a single coax cable which would allow the
control unit to be accessible.

Help greatly appreciated

David