Troubleshooting Interference to Satellite TV

Satellite is a way of receiving digital television services using a dish, mounted with a clear line of sight to the sky. It receives a signal from a satellite. The same signal is received by everyone in the UK who has a satellite dish and receiver. It is quite difficult to align a dish correctly and a qualified installer is recommended.

Owing to the frequencies used to deliver satellite television, it is very rare to have problems of interference to satellite television. Often a reception problem will look like interference.

Satellite System

A satellite signal is received via the dish and focused onto a device at the end of the metal rod which is known as a low noise block (LNB). This signal then travels through cables from the LNB to your set-top box or television.

The following could be the cause of your problems. 

Worn or damaged

A satellite dish and its LNB need to be in good condition and not rusty, bent or broken; this includes the metal rod that holds the LNB. Water can leak into the LNB if the dish is very old, affecting reception.


The dish needs to be free from obstruction and mounted high enough to have a clear line of sight to the sky.


The dish must point to the satellite you want to receive. The dish can move in high winds, so it is worth checking it is pointing in a similar direction to your neighbours'.

Cable and connectors

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. Check that none of the cables and connectors are damaged or wet. Also, severe weather can impact satellite reception. 

RA_Satellite damaged

                                                                                   Damaged satellite dishes

Qualified Installer

The BBC cannot recommend individual installers. The CAI (Confederation of Aerial Industries) is a recognised trade body which will be able to put you in touch with one of its members in your area.