Helping viewers who have set-top aerials
If you have an indoor or set-top aerial and notice new interference to Freeview, this guide may help you identify and resolve the issue.
Use of set-top aerials
Set-top aerials are often unable to provide a consistently good quality signal, as they are low to the ground and susceptible to receiving unwanted signals and other forms of interference.
This might include passing vehicles such as motorbikes, buses, and construction traffic; and machinery including lawnmowers and vacuum cleaners.
In many cases, set-top aerials have high amplification which further intensifies the problem.
Set-top aerials are designed to work in strong signal areas only
- The BBC and ITV assume that terrestrial broadcasting is best received via a TV aerial that is at least 30 feet above ground level.
- CAI, Digital UK and DTG do not recognise set-top aerials as reliable TV reception devices.
- TV manufacturers recommend the use of an outdoor aerial above roof height to provide good quality reception.
Types of set-top aerials
Set-top aerials such as the ‘double loop’ variety are not particularly suited for viewing TV services in the UK. Not only are they quite poor at receiving UHF signals, they also tend not to filter out unwanted signals, interference and wrong frequencies.
Log periodic set-top aerials (those with a pointed shape) are a better design but still only offer relatively low reception quality.
All set-top aerials are a compromise on good aerial design.