|Want a clearer search or information about missing Freeview light channels?||1|
|22nd May 2013 retunes for Devon and Carmarthenshire||2|
|Apologies for UK Free down this morning||3|
|15th May 2013 retunes for Yorkshire coast and Dorset, Wiltshire, Isle Of Wight||4|
|Want to see where a point on a line of sight on a map? Click on UK Free TV!||5|
|Want to better understand the current TV faults? See the all new UK Free TV page||6|
|Want EVEN better ADVANCED aerial to Freeview transmitter terrain plots?||7|
|Want better aerial to Freeview transmitter terrain plots? Check out UK Free TV!||8|
|Brighton to be the fourth at800 test area from mid-May 2013||9|
|Steve P Well Nick at least you have managed to get the cost||1|
|KMJ,Derby R.H.Richards: Have you re-tuned since Wednesday (2||2|
|Donald NIcolslon I have lost all NBC channels and putting tv||3|
|Tessa I have lost all my freewiev channels in Swansea since||4|
|R.H.Richards bbc1 and bbc2 offline 25/5/13||5|
|William Wren ITV Border has an office at the Kingstown area||6|
|Marc Ringmer, just east of lewes. I have got a booster attac||7|
|William Wren Briantist can you update your Freeview list abo||8|
|H.J. Clarke Cannot Tune COM4 SDN at all- 650 mhz - (only ?)||9|
|Dave Lindsay Marc: Where about are you? Could it be interfer||10|
|Freeview reception predicton||1|
|Mendip (Somerset, England) digital TV transmitter||2|
|All free-to-watch channels||3|
|Sutton Coldfield (Birmingham, England) digital TV transmitter||4|
|How do I know if the 4G broadband will overload my Freeview? | 4G-at-800||5|
|Can I use my ex-contract sky digital satellite receiver to get Freeview channels?||6|
|Winter Hill (Bolton, England) digital TV transmitter||7|
|Can I receive British Eurosport for free?||8|
|My Sky box has a "no signal message" - what do I do?||9|
|Can I stop paying Sky and use my satellite receiver to get Freeview ?||1|
|My Freeview box has no EPG, is blank on FIVE, ITV3, ITV4, ITV2+1, has no sound or the channel line up is wrong||2|
|What can I do when my Sky Digibox says 'No Signal' or 'Technical fault'?||3|
|Can I use my ex-contract sky digital satellite receiver to get Freeview channels?||4|
|Can I receive British Eurosport for free?||5|
|My Sky box has a "no signal message" - what do I do?||6|
|How do I change the RF output channel on a Sky Digibox?||7|
|My high gain aerial can't get all the Freeview channels I expected||8|
|How can I get Channel 5 on Sky in Ireland?||9|
|How can I watch Channel 4 and five on satellite if I have no card or a free-to-view card?||10|
Under normal circumstances, the signals from each television transmitter can only be received by those homes and businesses that have aerials that have a direct line-of-sight to the transmitter.
The part of the signal from the transmitter that is directed upwards simply escapes into space and are lost.
When there is high atmospheric pressure (BBC Weather - UK Pressure chart) as the sun heats up the ground the warm air gets trapped underneath the colder air higher up. At the point where the warm air gets trapped under the cold air this creates a layer that is, in effect, a mirror for the television signals.
This means that signals that would otherwise be impossible to receive can suddenly effect your television reception.
The digital television signal uses a format called COFDM (coded orthogonal frequency division multiplexing) and this incorporates the ability to ignore reflected digital signals.
However, analogue television signals do not co-operate with each other and the picture quality is reduced. The very weak digital signals that were used before digital switchover for Freeview were badly effected by interference from reflected signals from adjacent analogue transmissions.
I recommend you look at the Tropospheric Ducting Forecast for VHF and UHF Radio and TV page for a current forecast - yellow, orange, red, and pink indicate that conditions are perfect for the effects listed above.