At the moment there is one coax cable from a tv point in the living room up to the aerial on the roof and thats it.I am an electrician not a tv man i am wanting to put three more points. In upstairs. One in each bedroom i have heard of a 4 way distribution amplifier .How do you wire these ?is it just my 4 co axs. From living room and 3bedrooms into the distribution amplifier and another out of the amplifier to the aerial on the roof?