Error source

Antenna connectors with plastic housing

Antenna connectors with plastic housings are always permeable. There is approximately a one centimeter opening in the shield where signals can penetrate. Just a single connector in an entire installation can disturb the quality of images on all TVs in the house.
 

   Solution

Angle connectors of good quality

If you want to mount cables and connectors, then buy good quality cables and connectors, namely those that are closed (metal connectors that crimp completely on the cable’s shielding).
 

Read more   Installation guide

   Error source

Antenna cables with bad screening

On this antenna cable the screening or metal foil beneath the outer screening threads is missing. This means that protection against disturbing signals will not be sufficient.
 

   Solution

Double-shielded antenna cable

Double shielding with foil and a woven sheath of tinned copper wire. Minimal requirement for permeability is Class A (85 dB). Antenna cables must not be bent in sharp angles. If you permanently mount antenna cables, then do not hammer the clips over the cable so they deform the cable.

Choose YouSee Ready/Stofa Approved cable to ensure that you have the necessary quality.
 

Read more   Installation guide

   Error source

Bad distribution boxes

Distribution boxes are made of plastic. This does not screen against outside signals and gives a bigger opening in the installation and the possibility for disturbances in the TV signal. Furthermore it does not amplify the signal, which can result in the TV signal not being strong enough to be displayed on the TV.
 

   Solution

Antenna amplifier

It is recommended that an amplifier is used if 2 or more TVs are to be connected. Choose an amplifier and splitter that are decently insulated. Look for YouSee Ready/Stofa Approved logos. HCS 1-4 and HCS 1-8 are examples of amplifiers that can distribute and amplify the signal to multiple TVs.
 

Read more   Installation guide

   Error source

Ready-to-use mounted cables

As with plastic antenna connectors, it is equally important that ready-to-use antenna cables are of a decent quality. It is impossible to know how good a cable’s shielding is without damaging it or without having advanced measuring equipment. This antenna cable, when cut and examined, was found to be permeable. The shielding is not decently fed through to the connector.
 

   Solution

Connection cables of good quality

Cables from sockets to TV sets must be of a good quality. Therefore look for YouSee Ready/Stofa Approved logos. The shielding must be correctly fed through the connectors. Ferrite cores (the two sleeves around the cables) gather the noise that creeps along the shielding’s outside surface.
 

Read more

   Error source

Homemade junctions

Homemade junctions of antenna cables are not sufficient and it does not help to place tin foil around them.
 

   Solution

Quality F-connectors

If antenna cables are to be combined, then it must be done with F-connectors of high quality.
 

Read more

   Error source

Wall outlet without protection

The wall outlet in the image has no metal backing plate to protect from outside signals. The front resembles many other types of sockets, and can therefore be confused with one that is HF protected.
 

   Solution

Freja outlets

Electronics in sockets is protected by a metal housing, while at the same time the shielding is fed to within two mm of the screw. The bronze spring-loaded cover closes it so that the socket is completely HF protected.
It is most important that the socket is correctly built, otherwise it will be susceptible to disturbing signals.

 

Read more

   Error source

Unprotected antenna amplifier

This amplifier has a hole in the top to adjust attenuation, but at the same time this can function as a possible leak in the design. Besides that, the power leads are fed directly into the amplifier where they can act as an antenna that collects disturbing signals and feeds them directly into the amplifier.
 

   Solution

Antenna amplifier from DKT Home

This is the top of an antenna amplifier from DKT Home (plastic cover has been unmounted). Here there are no direct openings to the amplifier, and the red lead is fed into a filter prior to feeding the amplifier with current. This means that disturbing signals cannot enter and damage the signal.
From the outside it is difficult to see if one amplifier is better than the other. This emphasizes the importance of selecting a model that is approved by a 3rd party. The models from DKT Home are YouSee Ready and Stofa approved.

Read more   Installation guide

   Error source

The TV itself can be a problem

Even after the debugging steps have been followed, the problem can continue to exist. This can be because the TV has a leak in the tuner where interference can enter.
 

   Solution

Antenna amplifier

If the remaining part of the installation is protected against HF, then an amplifier can be placed before the TV. By amplifying, the TV signals and the disturbing signals are simultaneously at the same level. This means the TV signal is stronger than the disturbing signal, allowing the TV to present an image without pixilation and other errors.

Note that the amplifier must also be HF insulated.
 

Read more   Installation guide

Step-by-step debugging of the antenna installation

This is a thorough guide to debugging the antenna installation. The guide is built upon an exclusion method where step 1 is the simplest solution. We guide you through the entire process.

Start here