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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.

Help with Freeview, aerials?
How do I get a test card with Freeview1
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I have been told I would receive too much singal from my Freeview tansmitter as 3
Can my Freeview box receive more than one BBC and ITV region?4
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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
High pressure causing channel loss through "Inversion"3
Digital Region Overlap4
Freeview reception has changed?5
Two frequency interference 6

Comments
Thursday, 10 February 2011
A
Al
4:14 PM
Dundee

Hi, the last couple of days both of my freeview boxes have been freezing randomly. Both tuners strength and quality keeps going up and down, sometimes it says buffering. Any ideas ? im in dundee and both tuners are highland and islands.
Thanks
Al

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Al's 1 post GB
Briantist
sentiment_very_satisfiedOwner

6:34 PM

Al: Please can you see the Freeview reception has changed? | ukfree.tv - independent free digital TV advice page, if you've seen everything above.

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Briantist's 38,844 posts GB
Friday, 11 February 2011
B
Bungee
1:47 PM
Guildford

Guildford transmitter says no reported problems! For over a month have been unable to view digital channels in evenings (apart from the three BBC channels) - all very pixilated(?) and very distorted (frozen picture but with sound or picture and no sound). During the day it is all fine but from about 1700 it is very bad. Have had aerial checked and it's okay and have run the reprogramme. Any advice ?

link to this comment
Bungee's 1 post GB
Briantist
sentiment_very_satisfiedOwner

2:00 PM

Bungee: Have you checked everything at the top of the page? You should have perfect reception at your location.

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Briantist's 38,844 posts GB
Tuesday, 15 February 2011
B
Bru
12:40 PM

Hi, when my central heating pump is on run down, nothing else is running on the heating system, but the pump, when the pump does switch off it interferes with the freeview pictures, where the picture pixcelates or even switches off completley, then goes back on. what can I do to sort the pump.

link to this comment
Bru's 4 posts GB
Briantist
sentiment_very_satisfiedOwner

1:04 PM

Bru: If that is happening, then you can try a few things:

1) You might find that simply replacing an aerial "fly" leads with the higher quality sort will prevent the problem;

2) Using a "mains filter" for your Freeview box and/or TV should also fix the problem.


link to this comment
Briantist's 38,844 posts GB
S
Steve Edwards
9:54 PM

I have recently lost a whole 'multiplex' ITV1 Channel 4 Five etc after retuning my TV

I have reset the TV and retuned, checked for interference from electrical devices

I live in an appartment block with shared ariel and have never experienced similar problems in the past I am not aware of other problems within the building.

Is there a problem withthis multiplex (Cf14 postcode) or do I need to invest in a booster (although I cannot understand why this has suddenly changed).

link to this comment
Steve Edwards's 1 post GB
Briantist
sentiment_very_satisfiedOwner

10:05 PM

Steve Edwards: As it is a single transmission, you either receive a multiplex, or you don't.

Please first see Single frequency interference | ukfree.tv - independent free digital TV advice and if that doesn't work, you need to contact the management company who provide the aerial, as it may be a systemic problem.

Boosters usually disrupt digital reception and rarely improve reception.

link to this comment
Briantist's 38,844 posts GB
S
Sandra Lucas
11:34 PM

Every time we send or receive a text message or call on our mobile phones the television screen pixellates and is unwatchable and the sound goes. We are all on different phone networks. Is there anything we can do to stop this?

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Sandra Lucas's 1 post GB
Wednesday, 16 February 2011
Briantist
sentiment_very_satisfiedOwner

6:07 AM

Sandra Lucas: Yes, you might find that simply replacing an aerial "fly" leads with the higher quality sort will prevent the problem.

Otherwise ensure you keep mobile phones away from the receiver and cables.

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Briantist's 38,844 posts GB
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