An Aerial sat on your roof produces a voltage that is fed into your television.
This voltage varies with the necessary information to produce a TV picture.
The strength of this voltage supplied by your aerial can be very high, or low depending on what your view to the TV transmitter is, if you have line of sight,then you can split the signal into several rooms without the voltage dropping or your picture breaking up or freezing.
But if you live in a valley or local dip,then you are starting to look through solid earth which knocks the voltage level down.
If this is too severe then you will need to increase the signal using an amplifier,very much the same as turning up the volume on your HI FI
Below is a mast head TV aerial amplifier.
This attaches, unsurprisingly to the TV aerial mast,amplifying the signal to allow for losses in the co ax cable,which are pretty large.
A power unit powers the amplifier through the co axial cable,through a process known as diplexing,thus getting around the need for a mains point,a quick powerful way of overcoming poor signal reception.
Both these units are referred to as a TV Aerial booster.
Below is the typical sort of Amplifier found at the back of the TV set,or found in the loft,used for piping TV signals around the house.
It plugs in to mains power,and takes the Aerial's cable feed directly,other versions allow FM and UHF to be piped into a room using a single cable.
Atlas aerial systems
Supply and install of TV aerials and satellite systems TEL:07891903013
125,East Bawtry Road