One For All SV9440 Amplified Indoor TV Aerial

• The analog aerial has a variable gain and works within a range of 50 km for DVB-T. The further away you are from the signal source, the poorer the signal. 
• For digital TV reception - you get either a good picture or no picture at all. If you are away from the signal source you do not receive any picture. 
• The digital aerials have built in filters to lower noise and improve picture quality. 
• The analog signal is transmitted directly to the TV while the digital signal needs to be decoded first. This allows error corrections as well data as compression to be made to the signal for obtaining extra features as extra channels, EPG, Pay TV, interactive games, etc.

Unfortunately the physics of indoor aerial makes it quite difficult to troubleshoot them, as the reception quality can be affected by numerous factors related to the actual building and its surroundings (e.g. population density, building material, amount of electronic devices in the area, building density, environmental aspects such as mountains/valleys, humidity of air etc.). 

However, here are some tips on how to improve reception.  

1. Distance to TV transmitter: Know the distance between your home and the TV transmitters broadcasting in your area.  

2. Position of the aerial: Reception not only depends on distance from a broadcast tower, but also on the terrain and the surroundings (nearby houses, buildings, trees, etc.). Therefore, the height of your aerial is a critical factor. When placing indoor, try installing it in the attic near a window. Keep in mind that objects in a room can interfere the signal, so try different locations to find out the most optimal place. Pick a spot where the aerial will be secure and where you get the best coverage. Like analog aerials, a digital aerial works better the higher you can place it and the closer to a window. Move your TV aerial to the highest point possible and close to a window, and you will probably see drastic improvement! 

3. Direction to TV transmitter: Check the aerial of the neighbours to get the right direction towards the nearest TV transmitter. 

4. Polarisation TV network: TV transmitters broadcast the TV signal using vertical or horizontal polarisation. In most of the countries the TV signal is broadcasted in horizontal polarisation (check your terrestrial TV operator's website to get the latest information). The aerial needs to be placed in the same position as the TV transmitter. Because most of the TV transmitter are horizontal polarised it would be best to start putting the aerial in a horizontal position. One For All aerials receive vertical as well as horizontal signals.  

5. Keep your TV aerial away from metal: Keep in mind that metallic surfaces near your aerial can cause interference with the digital signals and can even block your reception. For example, when placing your aerial in a window, even metal burglar bars in your window can cause issues (metal blocks both TV and Radio signals). Try to keep as much distance as practical from metal objects (6 feet or greater is ideal).   

6. Strong signals areas: If the signal strength in your area is strong and you are using an antenna with built-in amplifier it might be possible that the TV receiver gets too much signal. This might reflect in loss of TV signal. The amplification of the antenna can be reduced by turning the variable gain control from max to min. Put it on min and scan for TV channels again.  

7. Telescopic aerials: If you are using an aerial with telescopic aerial make sure that the aerials are extended to the maximum length to get the best performance. When using an aerial with two telescopic aerials the best way to start with is positioning them at an angle of 90° away from each other. 

8. Longer cable: Extending the aerial cable will slightly reduce the signal level that gets to your TV, but if the longer length allows you to reach the window that is facing the TV transmitter it might improve your TV signal. Try not to use an unnecessarily long cable though, as that will reduce your signal level. 

9. Cables other devices: Keep all other wires and cables as far away from the aerial as possible. The proximity of other cables can interfere with the reception. 

10. Amplified aerial: Adding a signal booster to your aerial or using an amplified aerial can give you better results than a passive aerial. Hopefully, these tips will help set you on the path to getting the best reception possible from your TV aerial. 

Press the small button on the right side of the antenna and it will show you for 30 seconds the current strength of the signal. Each time you rotate the dome or re position the antenna, you must re-scan for channels on your TV.