Freeview: Loft aerials | Installing
My UK Free TV settings
For an enhanced Freeview reception
prediction please enter your
full postcode, a national grid reference or
a UK latitude and longitude pair.
 
Most popular 07:52
Twitter 07:52

Briantist: http://t.co/UVoop1CQfz Argument preview Free TV at a bargain price SCOTUSblog ProtectMyAntenna org Aτ its core this dispute is about of
Briantist: http://t.co/7L1cFkby5T Ofcom begins review of wholesale offer of Sky Sports 1 and 2 UPDATED Recombu recombu com
Briantist: http://t.co/zHzgogA8QG The making of an icon Celia Chapman co designer of the BBС 2 ident relives creating that fat sharp edged little
Briantist: http://t.co/5Kzf8juZ9q We dont all look to the Sky for the best TV Exρress Star There I was at the last Saturday afternoon home match a
Briantist: http://t.co/hGxLbOFgCy Feedback BBC iPlayer App 18 Apr 14
Briantist: http://t.co/CienkyVlP9 Media Royal videο IPSO Adoption Docs Peter Greste
Briantist: http://t.co/QowjkptEED BBC iPlayer Help iPlayer Radiο Problems since 22 April 2014 on PC and Mac Some users have encountered the error
Briantist: http://t.co/hygLfkgk9v Aereo s Supreme Court case could cɑtch TiVo and others in its crossfire Quartz The word to listenfor in todays a
Briantist: http://t.co/tMHc5TATSb Log In The New York Times Create an account Subscribed through iТunes and need an NYTimes com account nytimes
Briantist: http://t.co/N9C6DQ0WoB Media Monkeys Diary BBC Tony Gallagher Ipso and Zai Bennett Media The Guardian Yοuve got Mail Tony Gallagher to

Click here to follow Briantist on Twitter
> Freeview >Installing >Installing

Loft aerials

One of the most common problems people have with Freeview reception relates to the use of "loft" aerials.

One of the most common problems people have with Freeview recep
Published on by on UK Free TV

One of the most common problems people have with Freeview reception relates to the use of "loft" aerials.

Because the analogue TV transmitter network uses very high power transmissions (the total ERP for the UK is 64 megawatts) many people have installed their TV aerial in places such as lofts, or have used other www.ukfree.tv link icon Indoor Aerials.

The effect on that roof tiles and walls have on analogue TV signals is that the picture will degrade slightly. Making the signal slightly weaker will add a 'snow' element to the picture which is mildly irritating. The picture quality drops, but it is usually possible to make out the picture, as demonstrated here:



Many people have preferred this slight loss in picture quality for the perceived benefits of a loft-mounted aerial. Loft aerials are much easier and somewhat safer to install, and the aerial is shielded from wind and rain that can cause damage to rooftop aerials. In some places (such as New Towns) TV aerials have been previously banned from rooftops.

However, the BBC and others state that Freeview reception demands a roof-top aerial. The existing (pre Digital Switchover) Freeview signals are at very low power levels. The use by ITV, Channel 4 and five of "64QAM" mode for their transmission multiplexes to provide more channel choice results in a very lower chance of reception of these channels (multiplex 2 is ITV1, ITV2, ITV3, ITV4, CITV, Channel 4, More4, E4, Film4+1; multiplex A carries five, five Life and five US) with a loft-mounted aerial.

By comparison with the image above of how analogue signals look as the signal grow weaker, digital TV reception will continue to give perfect pictures and sound as the power level drops off, until suddenly the level drops below what the COFDM system can cope with. At this point the picture will become blocky and freeze whilst the sound will appear to come and go. Another tiny drop in signal level will result in no picture or sound and a message saying that "no signal is being received". As the signal can vary with weather conditions, people often find that a loft aerial will work when installed and then suddenly stop some months later.

After switchover

After switchover new digital signals will replace the existing analogue and digital ones. The new digital signals will be at much higher levels that the current ones (for most people) and this will help with reception. However, all six multiplexes will switch to the www.ukfree.tv link icon 64QAM mode that causes the problems indicated above.

Due to our Climate Change commitments (Kyoto Protocol), the signal levels for these new digital will not be as high as those currently used for analogue. For this reason you should not depend on the increase in power levels after switchover compensating for having a loft aerial.

Wherever possible you should use a rooftop aerial. If this is impossible, you may find that connecting your aerial to your Freeview box or integrated digital television using satellite-grade coaxial cable will compensate for the loss.





Your comments: most recent posts are at the bottom

firstFirst comments prevEarlier comments  ◊ 

Your comments are always welcome. Please use the form below to add your thoughts or questions to this page. We will get back to you as soon as we can.

J
jb38
Tuesday 14 January 2014 5:58PM

dave simpson: By the way as far as the aerial is concerned, its not so much a case of changing it for a better model but making sure that its positioned as far away from the source of interference as possible, this also applies to the powered booster / splitter.


updates
Automatic update every 1 minute



Please post a question, answer or commentUK Free TV is here to help people. If you are rude or disrespectful all of your posts will be deleted and you will be banned.







Privacy policy: UK Free Privacy policy.