July 24, 2013

New 4G Filters Will Prevent 4G Mobile from Causing TV Interference

New 4G Filters

New Filters Will Prevent 4G from Causing TV Interference

4G is coming in a big way, for the most part that’s good news, but the 800 MHz 4G signal could cause interference with digital terrestrial TV reception, particularly in areas near to a 4G mast or places where Freeview TV reception is weak to begin with.

Thankfully it’s a problem that Link Microtek have been working on and claim to have solved. The company won a contract earlier in the year from Digital Mobile Spectrum Limited (or DMSL- a company jointly owned by O2, Vodafone, Three and EE), to create and supply filters designed to prevent the 800 MHz 4G signal from interfering with television reception.

The resulting 4G filters are called ‘LYNX filters.’ They feature low insertion loss and high rejection rate of LTE signals and are available in both single-dwelling (for example a house) and multi-dwelling (for example a block of flats) variants.

The multi-dwelling versions are designed to be installed between the receiver antenna and the amplifier and distribution equipment. They are sealed to IP65 standard and have an operating temperature of -20 to 65 degrees Celsius, which should make them suitable for both indoor and outdoor use. These filters would of course be installed by a professional.

The single-dwelling versions are designed to be DIY friendly as they are simply installed between the antenna cable and TV receiver. They come with Velcro tape to make it easy to mount them, but if necessary they can also be supplied with a separate 140mm long cable, allowing for more flexible placement.

In areas where interference is expected or is already being experienced the DMSL will provide each household with one filter. In theory you shouldn’t need to contact them to get one- they’ll just send it out to you, hopefully before 4G becomes a problem.

  • Sue Bennett

    I can’t tune in my bbc channels on two of my tv’s could this be 4g interference

  • Kevin Thomas


    These are the people you may like to contact
    This year will see the arrival of 4G on the 800 MHz frequency in the UK. This could affect TV channels on Freeview unless you follow our guidance. Don’t worry, we are here to make you aware of the upcoming issue, and help you take any appropriate action at the right time.


    My Brother in Law and my Son have received a small box to stop the interference that we are getting on our BBC channels. We have received nothing, we did not even know what was happening when the channels stopped working How can we get this gadget, why should we have to pay out for the gadget when our relatives have received it free and we already pay out licence for BBC.