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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
published on UK Free TV

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?

Help with TV/radio stations?
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Can I get E4 with this service?3
Is sky|one going on Freeview?4
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In this section
Ofcom announces 700 MHz clearance schedule 2017-201
When will I get a new Freeview aerial because of even more mobile broadband? 2
Do not forget that 4G starting soon in 20 cities and towns really soon3
Using UHF channels C61 to C69? Time to retune4
Two final Freeview retunes in Scotland on 24 and 31 July 20135
800MHz band cleared by Digital UK - ready for nationwide 4G use6

Saturday, 3 May 2014
2:01 AM Settle

I live in Settle BD24 0DL in a poor TV reception area. My Aerial signal suddenly packed up during the recent bad weather. As the Aerial and cables were over 10 years old I decided to change all the parts for new ones eg Aerial, Antiference' splitter combiner, Masthead Amplifier and Coaxial cable. I pointed the Aerial to the higher recorded signal on the Meter, happy with the work. Unfortunately, by retuning I can only received ITV and other channels but no BBC channels at all. My radio has slight noise interference.
Do I have to re-adjust the Aerial position and try again or something wrong some where, anyone has any idea?

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Eshan's 1 post GB
8:05 AM

Eshan: The only transmitter that your location is indicated as being able to receive is Winter Hill @ 33 miles / 197 degrees, therefore your best policy would be first of all blank out anything stored in your TV's memory by carrying out an auto-tune with the aerial unconnected, once completed reconnect the aerial then go into your TV's tuning menu selecting "manual tuning" and enter C50 (Winter Hills BBC) into the box but do NOT press search or scan, as on most TV's (or boxes) if any signal is there to be received the strength and quality of will be be shown on the indicator bars, if anything is seen then leave the TV on that signal test screen and adjust your aerial for the best results. On completion, you can then either carry out a normal auto-tune or alternatively continue manually tuning in the remaining 5 (or 6) mux channels used by Winter Hill, those being / 59 (ITV1) - 54 (HD) - 58 (ITV3) - 49 (Pick TV etc) - 55 (4Music etc) - 31 (the new COM7 HD channels which may, or may not be receivable at your location)

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jb38's 7,179 posts Platinum Platinum GB
9:18 AM

Eshan : In addition to that said, I also meant to enquire as to what type of Antiference aerial you chose to install? because to be able to take advantage of the new COM HD channels transmitting on mux C31any newly installed aerial should really be a wide band type and not C/D grouping and which its assumed was the type previously fitted? a C/D type's lowest operating channel before its performance drop's off being C48.

By the way, a C/D aerial can be identified by a green plastic plug being seen on the end of the elements support boom, wide band types being black.

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jb38's 7,179 posts Platinum Platinum GB
Wednesday, 8 April 2015
sue Hickerson
8:19 PM Northampton

8.4.2015: This is a question relating to post code area NN2 8QH , one month ago I had a free view Ariel fitted ,prior to this I used a free Sat system with no problems . Since the fitting and using the free view I have interference on BBC 1 & BBC2 , the tv engineer has fitted a booster but this has not solved the problem . Any help on how to fix this without any further expensive would be appreciated .thank you

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sue Hickerson's 1 post GB
8:42 PM

sue Hickerson: What transmitter are you tuned to? Fortunately, you've included your postcode, and as you can see, you should be fine for Sutton Coldfield, but less good for others. If you are tuned in somewhere else, then you will get poor recption, even with a booster. Of course, if your tuned into the very local transmitter, its so close (and with a booster) that your TV might find the signal too strong.

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MikeB's 2,559 posts Platinum Platinum GB
9:44 PM

sue Hickerson : Although the Sandy (Anglia) transmitter is listed in the "Planned Engineering Works" page under the heading of "Possible weak Signal", this may not necessarily be the cause of your problem, as a number of Northamptonshire areas are notorious for suffering from erratic reception at certain times of the year, basically due to the signal path from both stations receivable in your location, namely Sandy (mostly used in your area) and Sutton Coldfield, both suffering from line-of-sight obstructions, the terrain indicator showing multiple obstructions from the latter mentioned.

Before making any attempts to improve the situation, I would try and make an enquiry with another household in your immediate vicinity to ascertain if they are also suffering from similar reception problems, because if they are, then the problem is out with your control.

That said is based on you using the Sandy transmitter for reception and not the Dallington Park Freeview "light" relay.

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jb38's 7,179 posts Platinum Platinum GB
Monday, 8 May 2017
10:36 PM Northwich

Getting 'No Signal' message on two Panasonic HD TVs on some HD channels.
Have 48 element Labgear aerial in loft (4th storey) pointed towards north (Winter Hill), with Antiference amplifier in loft.
Checking DVB signal condition on both TVs seeing;
Signal strength 10 on all channels,
Signal quality 10 on CH31, 37, 49, 50, 58 & 59,
Very variable signal quality on CH55 & 56
Postcode: CW8 1GF

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Rak's 2 posts GB
11:07 PM

Rak: Could start with having 10 on signal strength - thats far too high, and possible the source of 'no signal'

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MikeB's 2,559 posts Platinum Platinum GB
11:21 PM

MikeB: OK Thanks Mike.
The No Signal only occurs on CH55 & 56 when signal quality falls to 0 and a bit error is displayed.
When signal quality is 4+ picture is OK.
Should I try reducing the Gain on the amplifier to reduce signal strength?

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Rak's 2 posts GB
Tuesday, 9 May 2017
10:56 AM

Rak: The tuner will react to a very strong signal in much the same way as too little, and yes, you need to turn down the gain - its debatable whether you might need the amp at all. See 'too much of a good thing' on this website.

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MikeB's 2,559 posts Platinum Platinum GB
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