This will help you to see if there are, or have been recently, transmitter faults in your local area. There are differences between a reception problem and one caused by electrical interference. Our sister site, the Radio and Television Investigation Service (RTIS) also has useful information on how to distinguish the difference.
If it is potentially interference, your landlord or management committee can contact the regulator, Ofcom, for help with solving the problem, using their contact web form. Since it is a communal aerial, you will not be able to contact Ofcom directly. Why can I not receive all BBC HD services on Freeview? On Freeview the BBC does not have enough of its own capacity to carry all its HD services.BBC News HD, BBC Four HD and CBeebies HD are broadcast using capacity on commercial multiplexes. The commercial capacity has certain constraints, which mean these HD services can only reach about 70% of UK homes. Please use our Transmitter tool to see if you are in coverage.
If you have recently lost the BBC HD services on the commercial capacity, further information on why this may have happened can be found on Freeview TV Changes. My Television reception is usually good in the day, so why does my television reception sometimes deteriorate in the evenings? Firstly, you may have a poor aerial system, so we recommend you checking over your installation by reading our Good installation help guide . Secondly, you may be on the edge of Freeview coverage, and likely have a weak signal. This may be fine during the day, but in the evening, signals from distant transmitters can travel further, and can cause reception problems for those at the very edge of coverage. Use our Transmitter checker tool to see if you are in an area of good reception and for further advice. Why are subtitles sometimes delayed or out of sync? For programmes which are pre-recorded, we create the subtitles in advance. A technician uses the audio and picture to sync them with what’s happening on screen. For a programme broadcast live, (like the News), subtitles will be generated as it is broadcast, which is a complex and problematic process. This means you’ll often notice a delay when watching live programmes. I have lost my BBC 4 HD after I have completed a retune. Following a decision by the Government, some channels used by Freeview, are being reallocated to allow for the future development of new mobile broadband services. This may mean some viewers will lose some TV services, or need to repoint/change their aerial. Contact the Freeview Advice Line on 0808 100 0288, or for further details please see Freeview TV Changes. There are all kinds of aerials available on the market and some which are specific to certain frequencies. A wideband aerial is a popular choice, although there are other aerials available. A qualified aerial installer with local knowledge will be able to advise further. Your aerial should be as high as possible pointing towards the transmitter with the best signal. Use the BBC’s Transmitter Checker tool to determine the best transmitter for your location. Ensure there is nothing in front of the aerial that could block the signal, such as trees. All TV reception predictions assume an outside aerial at a height of 10m from the ground. If you live close to a transmitter or can get a strong TV signal, then it could be possible to use an aerial in your loft or an indoor portable aerial. However, in both cases the signal will be weakened as it has to pass through various obstructions such as walls, roof tiles, foil backed insulation etc. Even if you are predicted to have good reception, you may have problems receiving services using indoor or loft aerials. A television signal will always lose some of its strength as it passes along the cable and through the connectors. Therefore it is important to minimise the loss by using good quality cable and connectors.
These are not recommended unless absolutely required as they can introduce unexpected reception problems. See our help guide on the different types of amplifiers available . Depending on the transmitter you are using, your aerial elements will need to be mounted flat (horizontal) or on its side (vertical). A qualified aerial installer with local knowledge will be able to advise further. However the CAI ( Confederation of Aerial Industries ) is a recognised trade body which will be able to put you in touch with one of their members in your area. Troubleshooting your Freeview Television reception. It is important to check that your installation is intact. For example all the cables between your television equipment and aerial are connected securely and none is damaged. Further information is available in our Freeview installation guide.
Check our Works and Warnings section to see whether there are any known problems. Using our transmitter tool , check the transmitter is not undergoing any work. Television signals can be affected by fine weather including high pressure (atmospherics) and the only solution is to wait for the weather to change, you should not retune during this time.