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High pressure causing channel loss through "Inversion"

High pressure does not just bring cold at this time of year, it is causing quite random loss of Freeview and analogue reception.

High pressure does not just bring cold at this time of year, it
published on UK Free TV

There is high pressure over the whole of the UK at the moment, and this causes the Inversion Effect. This is causing people to be missing a single Freeview multiplex, or have terrible analogue reception on a single channel. The problem may come-and-go or last for several days.

For details, please see What is the Inversion Effect and why does it effect my Freeview TV reception?.

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Sunday, 25 March 2012

11:28 AM

S Rogers: The problem is the low power Freeview service shares a frequency with high power French (and English) transmissions which are not normally receivable at your location. When the weather conditions are such that these high power signals travel further than normal, due to the inversion effect,your local signal is swamped by the out of area signal resulting in your receiver finding French channels, as you have observed.

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KMJ,Derby's 1,811 posts GB flag
Graeme de Preux
11:53 AM

Why is having Freeview channels disappear completely during 'interferance' ,when the old analogue picture is still there but just a bit fuzzy, considered to be Progress?

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Graeme de Preux's 1 post GB flag
Brian Gregory

2:06 PM

@Graeme de Preux
That aspect is definitely not progress and I don't think many people claim it is.

However the ability to have many more channels is progress.

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Brian Gregory's 23 posts GB flag
Gerry Thornton
2:31 PM

I live in Camberley, Surrey and last night noticed that we have completely lost the digital signals for ITV, Channel4, maybe others.
ITV3 & ITV4 are ok. Lost from both our TV & freeview/harddrive dvd box, anyone else in the area got this problem. Anyone know the cause?

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Gerry Thornton's 1 post GB flag
John Beeston
4:50 PM

Brian Gregory:
The ability to have more channels is only progress if you can watch them, which it seems those of us in this part of the country are unable to do.

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John Beeston's 8 posts GB flag
John Beeston
4:53 PM

By the way, thanks KMJ Derby for answering my questions.
Cheers, John

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John Beeston's 8 posts GB flag
7:21 PM

I live in Thanet (East Kent) and have suffered loss of most channels for the last three days which happens consistently with high atmos pressure. However we have cloud/mist at the moment and are still without most of the freeview channels. If I were to change the type/element of aerial does anyone know if that would help as summer is supposably on it's way and I would like to be able to watch as much of the sport on TV as my free time will allow.

Many thanks in anticipation.

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Nick's 1 post GB flag
David Dawson
7:34 PM

We have lost CITV station completely this there a particular reason. We live in greater London DAarea

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David Dawson's 1 post GB flag
David's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
9:00 PM

I lost my Freeview digital signal about 15 minutes ago, on all channels. I am in Suffolk, near Newmarket. Anyone else having problems?

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Jenny's 1 post GB flag
Valerie Aston
11:03 PM

Reception of BBC Four from my digital TV (via Freeview) has been dreadful for several days. Both picture and sound are completely broken up. Could this be due to atmospheric conditions?

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Valerie Aston's 1 post GB flag
Valerie's: mapV's Freeview map terrainV's terrain plot wavesV's frequency data V's Freeview Detailed Coverage
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