Your ability of receive all the Freeview transmissions depends on the suitability of aerial
the design style,
the "group", and
its physical location.
Standard type - Yagi aerial
The standard type of TV aerial is known as the Yagi aerial. It is mounted on a pole, and consists of a rod with a reflector (shown green) at the back and many spiky elements (in grey) at the front. The connecting cable connects to the element nearest the reflector, known as the driver (shown in blue).
These Yagi aerials are directional and so pick up signals best from a transmitter that the rod points towards. The more elements the aerial has, the better it picks up a signal and becomes more directional.
A standard-type aerial is all that is required for digital TV reception in most places. These antennae have between 10 and 18 elements and a single reflector. These are recommended for new installations for good digital television reception, but will more often than not function perfectly in good reception areas.
Typically these aerials are designed to receive only some transmission frequencies - see "groups" below.
High Gain aerials
These aerials are designed for poor digitalreception areas, and have two reflectors. For maximum signal strength, some digital high gain aerials have up to 100 elements. Since the switchover to digital-only transmissions back in October 2012, most UK households now have good quality digital TV signals.
A more expensive aerial is only required where the signal strength is low, but can often provide the whole Freeviewreception where it might otherwise be impossible.
The CAI (that represents aerial installers) has four standards for digital TV aerials. The highest standard "1" is for homes on the fringes of coverage areas, intermediate standard "2" is suitable for use within the coverage area; minimum standard "3" is for good coverage conditions.
These aerials can be either wideband, or receive only selected frequencies - see "groups" below.
You may haved used a 'Grid aerial' for analoguereception, but as they are generally unsuitable for Freeview reception, they have now generally been replaced by the Yagi type. However in some places a Grid aerial installation may work for Freeview: otherwise replace with a standard Yagi aerial.
Indoor aerials are generally not suitable for Freeviewreception. In areas of good signal strength it is often possible to receive some transmissions. Even where an aerial works, people often find that may get interruptions to their viewing (or recording).
The best position for a TV aerial is mounted outdoors, as high from the ground as possible, pointing directly at the transmitter. The signal can be blocked by hills and tall buildings. It should be positioned away from any other aerials.
Horizontal or vertical?
The transmitter will either use vertical mode which requires the elements of your aerial to be up-down, or horizontal mode which requires them to be level with the ground.
Both analogue and digital television is transmitted the same group of transmission frequencies (known as channel 21 through to 60). A coloured marking on the aerial shows the group.
To create the best possible analoguepicture, TV transmissions from adjacent transmitters have been designated to several different groups of frequencies. By using an aerial that receives only the channels in the correct group, the analogue picture can be kept free from interference.
To receive Freeview transmissions from the same transmitter it has been sometimes necessary to use frequencies that are not part of the transmitter's normal group. When this has occurred, the aerial will need to be replaced with a "wideband" aerial (also known as group W) - one that covers every group.
As Ofcom is planning to move the TV frequencies again - perhaps as soon as 2018 - it may be wise to use a widebandaerial if you can to ensure you can keep viewing Freeview for many years to come.
Q. I have outside dish (non sky) which has provided signal for freeview digi box on top of small 19" HD ready lcd tv. I have replaced the TV with a Bush 40" smart tv but when setting up the TV screen gives text `no signal please check antenna connections`.
If I choose to revert back to the old TV set (with the freeview top box) then the dish works OK. I don't understand what the problem is as I thought the dish should work both types of set. My idea obviously is to only have the one new smart TV in operation. I would appreciate your opinion please.l.
Since I positive wont have a sat tuner in it (LG and Sony's often now have sat tuners, and many Samsung and some Panasonics have Freesat), you going to have to use the box you used for the 19in TV, and in effect use it as a satbox for your new TV.
Connect it the best way you can - if the sat. box has HDMI, use that. If not, then at least you'll have scart, although you'll get no HD.
The only thing that occurs to me is that some years ago, someone reported using their dish as a Freeviewaerial. They were high up in a block of flats very close to the transmitter - someone guessed that the copper wiring was acting as an aerial - a fluke, but it could happen to you!
John Sturdy: If your system is genuinely operating on an outside dish then the box connected into it must be a Freesat device and not Freeview, as the latter uses a normal aerial system.
What I find a bit puzzling is how you manage to connect the coax from a satellite dish into a Freeview box or TV, as the connectors used for satellite devices have whats known as "F" connectors which screw into a threaded male socket.
Maybe you could clarify with regards to the model numbers of the devices being used.