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Expecting 4G interference? Tests now show that you have a one in 300 chance

Remember the scare stories in the papers? Millions of homes will have problems when 4G starts... Even the Ofcom figures suggested 760,000 homes would have problems. The 4G tests suggest the just 90,000 homes will need to fit a filter.

Remember the scare stories in the papers?  Millions of homes wi
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Looking back the the original posting, Ofcom moves to protect Freeview interference from 4G mobile, we can see the Ofcom suggested that:

Of the 16.3 million UK homes with a standard (unamplified, unshared) Freeview reception, 110,000 (0.67%) would be effected.

Of the 5.2 million homes using communal aerials systems, 550,000 (10.6%) will have problems.

Of the 5.6 million homes using amplified Freeview reception, 100,000 (1.8%) will experience problems.

Today, at800 have published the results of the tests in London, Brighton and Hove and York - at800 updates estimate of likely impact of 4G at 800 MHz on Freeview:

"Following tests conducted across the country, at800, the organisation responsible for protecting Freeview when 4G at 800 MHz is rolled out across the UK, has provided a new estimate of the likely scale of the impact. If national rollout reflects the results seen during its tests, at800 expects no more than 90,000 households, with Freeview as their primary TV service, to experience disruption caused by 4G at 800 MHz. Whatever the level of disruption, at800 is ready to restore Freeview to viewers.

at800 has now sent postcards to households in London and the surrounding areas in preparation for the activation of 4G at 800 MHz masts over the coming weeks and months. at800 is also sending postcards to other areas of the UK ahead of masts switching on. at800’s mailing does not mean that 4G services will be available to consumers. For information about the availability of 4G services, people should contact their mobile operators.

In London, in particular, Freeview received from the Crystal Palace transmitter is unlikely to be affected by mast activation because of the strong terrestrial television signal and its relatively large frequency separation from 4G at 800 MHz. However, at800 is sending postcards and running a publicity campaign to ensure anyone who does experience new disruption to their Freeview service knows how to get in touch."

So with 26.50 million TV households in the UK (see Monthly universe summary - BARB) 90,000 represents 0.340% of them - that's a ONE IN THREE HUNDRED chance.

It seems that you are most likely to need a filter if:

a) you are a long way from a high power Freeview transmitter; and

b) you are very close to a 4G mobile phone mast; and

c) you are using a booster.

That's good news for Freeview viewers.

If you have had a postcode from at800 - see Received a postcard from at800?

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Monday, 10 June 2013
had enough
7:13 PM

It is unacceptable for ANYONE to have to fit a filter.

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had enough's 1 post GB

8:13 PM

had enough: how so?

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Briantist's 38,844 posts GB
Tuesday, 11 June 2013
Jack Luxon

12:12 PM

Thanks to all who have provided me with answers to my questions/suggestions etc. I look forward to reading about the Brighton trial as top end of spectrum is used there. I should be interested to know how these trials are run, are local phone masts broadcasting 4G stuff or is there a bloke going around in a van with a transmitter?
I have discovered that signals from phone masts are normally cross polarised at + and - 45 degrees. This is good news.

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Jack Luxon's 33 posts GB
John Taylor
2:16 PM

Ofcoms pre role out research concluded that polarization difference would not make too much of a difference. The filters (type 59) do cause a small degree of insertion loss (around 3- 5Db). Type 60 supposedly caused none.

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John Taylor's 2 posts GB
John Taylor
2:27 PM

Apologies, that is the enhanced version not the standard that has non. There is also an enhanced 59.

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John Taylor's 2 posts GB
Wednesday, 12 June 2013
Daniella Dean
10:20 AM

My freeview built in TV has suddently blue screen with no signal - was working fine last week. Could this be down to 4G interference ?

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Daniella Dean's 2 posts GB

10:25 AM

Daniella Dean: Its not really possible for anyone to be able to offer assistance when a persons location is not known, this preferably being given in the form of a post code or one from nearby, e.g: a shop/post office.

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jb38's 7,179 posts GB
Daniella Dean
10:26 AM

Cowley in Middlesex area

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Daniella Dean's 2 posts GB

5:23 PM

Daniella Dean: The answer to the latter part of your question is "extremely unlikely", and with the somewhat limited info given regarding your location suggesting that you use Crystal Palace for reception, no transmission faults having been reported by this station nor are there any engineering works taking place.

Your problem is likely being caused by a fault in your aerial system.

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jb38's 7,179 posts GB
6:55 PM
Sutton Coldfield

Post code B75 5nt Sutton Coldfield transmitter in view. Until about 3 weeks ago my reception on free view has been fine with no interference. Up until today it was impossible to view a complete programme without blocking and spitting sounds. It is better today but we are still affected in some way. Any ideas why given the time frame?

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Maureen's 2 posts GB
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