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Freeview intermittent interference

When you get occasional sound loss or picture freezes

When you get occasional sound loss or picture freezes
Published on by on UK Free TV

There are several different types of interference that cause problems. This page deals with the situation where:



There are two main causes of this type of intermittent interference:

Induction interference

Induction interference is caused by mains-powered household devices that contain a large motor, such as:
  • Washing machine;
  • Tumble dryer;
  • Central heating pump or combination boiler;
  • Fridge;
  • Freezer;
  • Power tools (drills, jigsaws etc)
  • Vacuum cleaners;
  • Water pumps;
  • Automatic doors


You can identify if one or more of these devices is causing the Freeview reception problem by powering off the devices.

If one of these devices is causing the problem, then the reception problem can usually be solved by using a mains filter device and use it on the Freeview boxes mains connection.



Such as device is this: <img src="data:image/png;base64,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" class="xico" style="vertical-align:text-bottom" alt="www.maplin.co.uk link icon"> link iconMaplin: 6-Way Flat Screen and HDTV Surge Protector and Mains Filter.

Mobile phone interference

If you keep a mobile phone by your Freeview box or digital television, keep it further away!

This also applies to other transmitters such as baby monitors, video senders, walkie talkies, and portable phones.





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.

D
DonaB
Thursday 15 May 2014 8:38AM Swindon

Hi
On Tuesday this week (13th May) my Freeview signal dropped out completely for half an hour around 10:15. I wasn't too worried but then yesterday it was completely gone from first thing in the morning till I left home at 11:30 and then back again fully normal with no glitches at all last night. So far today it is also completely gone again so this appears to be a pattern developing. Is anyone else having this issue?
Can you tell me what would cause this sort of thing and who I should approach to solve it. I have two different digital TVs (Samsung and LG) so it won't be a fault with my equipment. My postcode is SN1 2LL Thanks

MikeP
Thursday 15 May 2014 8:42PM

DonaB
Not having experienced this myself even though I live a few miles south of Swindon, I have a suspicion that there may be some atmospheric affects causing this phenomen, though no proof of that. It has been noticed before that warm weather with high pressure areas tends to produce unusual loss of signals.
If it happens, please do not try to retune your TV or set-top box.

D
DavidM
Wednesday 11 June 2014 9:17PM Kilmacolm

I am having exactly the same problem, but near Glasgow. I can have no signal for 2 or 3 days and then it comes back at full strength. Days and times are random.
System is through a loftbox (which I have tried changing), and aerial is a Televes DAT45 as transmitter id 30 miles away.
This setup has worked for the last 5 years without a problem.

Could it be 4G interference?

M
MikeB
Wednesday 11 June 2014 10:58PM

DavidM: I'd start by checking your system. Although you say the day/time is random, its likely you have a problem somewhere in your setup, perhaps a break, etc, where moisture is causing problems. Check the cable from the loftbox, and perhaps change the aerial lead from the socket - it might be as simple as that.

Why is there suddenly a rash of people convinced 4G is a problem? Nothong for months, and then loads come along at once!


C
Chris Ogilvie
Tuesday 9 September 2014 1:37PM Bexley

I'm trying to help elderly neighbours who have a modern Viera TV with built in Freeview. They are finding that ITV gets interference which usually starts between 4pm and 6pm. I'm not aware that they have any central heating that comes on at that time, nor any other devices nearby that are likely to cause interference. They have one of the Full HD DVB-T Digital Indoor Aerials which was fine until a little while ago. No improvement since re-tuning their Freeview on 3rd September (PM) as instructed. Any help/advice would be welcome.

M
MikeB
Tuesday 9 September 2014 11:38PM

Chris Ogilvie: I'm assuming your getting an excellent signal from Crystal Palace (your only 14km away), and so it makes sense that they could get away with an indoor aerial (although there is no such thing as a Full HD Digital Inddor aerial - thats just sales talk).

Lots of people have had a problem after the retune, where they have picked up a different transmitter from the one they normally have, with a much lower quality signal, but your getting Crystal Palace, which starts on Channel 23! Panasonic Viera TV's are good kit, and would normally find this transmitter immediately.

The only thing I can think of is that the retune caused a slight change in signal strength, which might have made the aerial connections more vunerable to interference from some sort of electrical device at that time (although, as you point out, there is no evidence of such a device). Always woth checking the aerial lead, and change it for something better shielded.

Of course there is the possibility that signal strength is so high that the signal is breaking up, and its just that channle and that time that the problem is showing up. Might be worth looking the signal strength at that time - 75% is perfect, but if its on 90%, then it might go a bit.

C
Chris Ogilvie
Wednesday 10 September 2014 3:40PM Bexley

Thank you Mike B. I will investigate further on your advice.


N
Norman
Monday 15 September 2014 1:11PM

In the past three weeks I'm losing programmes from the channels. so for example, my tv guide display may list a BBC1 programme 8:30-9pm, then show a blank then show BBC news at 10pm.
Other channels within my multiplex blocks will have programmes missing at various times when I view the tv guide.
Have puled out aerial, done auto and manual resets several times, but still a problem.
Picking up Crystal Palace. Have areial going into dvd recorder

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