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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 UK Free TV

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

  • Freeview reception is perfect or near-perfect most of the time
  • The audio on TV and radio channels mutes momentarily a few times each minute
  • The picture on a Freeview channel freezes a few times each minute


There are two main causes of this type of intermittent interference:
  • 'Induction' interference
  • Mobile phone 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: Maplin: 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.

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In this section
Official aerial installers guide to the TV spectrum future1
Which free digital TV system will give me the most reliable reception?2
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Digital Region Overlap4
Freeview reception has changed?5
Two frequency interference 6

Comments
Sunday, 21 February 2016
N
Norris
12:20 PM

Hello
I reside in the Whetstone, London area and am experiencing pixelated picture and distorted audio. I have been through all the recommended checks and nothing changed. I checked with my neighbour and she is also experiencing the same issues. This does seem to suggest a common problem and since engineering work was carried out at Barnet just recently wonder if something has upset the balance for us.

It is very frustrating as it happens at intervals of approx a few minutes in a random fashion throughout at all times of the day and evening.

I would appreciate your help please.

link to this
Norris's 1 post GB
MikeP
3:57 PM

Norris:

A full post code is needed in these circumstances as what affects one road or house may not affect others nearby.


link to this
MikeP's 859 posts Gold Gold GB
Tuesday, 8 March 2016
E
Eve Steadman
11:13 AM

I live in Cambridge and am having problems of freezing and pixilated pictures on BBC News and Alzazeera only, which I understand are served by the Sandy Heath transmitter. We have been fitted with an aerial by the company which deals with FreeView aerial problems and the problem has reappeared after a period without problems.

link to this
Eve Steadman's 2 posts GB
M
MikeB
6:42 PM

Eve Steadman: We need a full postcode, and signal stength on BBC channels.

link to this
MikeB's 1,782 posts Gold Gold GB
Wednesday, 9 March 2016
E
Eve Steadman
10:48 AM Cambridge

MikeB: CB4 Thanks Mike: the problem disappeared so I wondered whether the cause had been the weather?
Have there also been engineering works at Sandy Heath?

link to this
Eve Steadman's 2 posts GB
Eve's: Freeview map terrain plot frequency data R&TI Service digitaluk trade DAB coverage
M
MikeB
1:42 PM

Eve Steadman: Could be lots of things, but what leaping out at me is the fact that your just 27km from Sandy heath. High signal strength could well be a factor. If your readings are high, then search for 'too much of a good thing' on this website - it might help.

link to this
MikeB's 1,782 posts Gold Gold GB
Monday, 28 March 2016
E
Ellie
9:53 AM

New aerial fitted 2 weeks ago, signal very spasmodic today. Worked for 10 mins then out for 2 hours back for 5 mins and now gone again. NN4 ONJ. Can the weather be causing this ?

link to this
Ellie's 1 post GB
MikeP
10:05 PM Trowbridge

Ellie:

It could be as others have reported similar disturbances to their reception. Do not try to retune your TV though as you are likley to lose more channels that way.


link to this
MikeP's 859 posts Gold Gold GB
MikeP's: Freeview map terrain plot frequency data R&TI Service digitaluk trade DAB coverage
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