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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
I would like to know if it is possible to receive UK terrestrial Freeview servic2
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
Is it true that my 87 year old mother is entitled to a FREE upgrade when the ana5
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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, 13 January 2011
Briantist
sentiment_very_satisfiedOwner

10:16 AM

Laura: You will get better signals from a rooftop aerial. You also have the choice of three transmitters, so you should choose the one with the least interference.

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Briantist's 38,844 posts GB
L
Laura
11:10 AM

I'm not sure we get a choice...? I have noticed that during and just after the interference the diagnostics have a warning saying "Not able to receive NIT". Not sure if this alludes to another issue.

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Laura's 4 posts GB
L
Laura
12:10 PM

Ok will do. Thanks for your help

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Laura's 4 posts GB
Sunday, 16 January 2011
E
Elaine
1:08 PM

Hi

I bought a freeview recorder box, which was working perfectly fine. But recently the sound has gone funny, it is like the people talking has hiccups and it is constant. Even on recorded programmes in my planner.

I have no mobile, power tools or washing machine interference nearby, it is in my daughters bedroom.

The aerial is on the roof and we have never had a problem like this before.

I am hoping it is not the box, it was second hand you see.

Any help would be great
thanks

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Elaine's 12 posts GB
Monday, 17 January 2011
Briantist
sentiment_very_satisfiedOwner

7:00 AM

Elaine: You could try changing your aerial "fly leads".

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Briantist's 38,844 posts GB
P
paul king
10:46 AM

I purchased at XMAS a new 22" digital tv (with built-in DVD) & continue to have intermittent loss of sound which is annoying. Have taken the TV back to retailer twice who exchanged & still problem occurs (venturer & Ferguson makes).

Had an engineer check the aerial reception & this is fine. Tried it in other rooms that already have digital TV & problem still occurs although the TV's already in there are fine.

Can't fathom out what to do next?

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paul king's 1 post GB
Briantist
sentiment_very_satisfiedOwner

1:42 PM

paul king: Any you have done everything at the top of the page?

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Briantist's 38,844 posts GB
Wednesday, 19 January 2011
E
E Barron
3:25 PM
Ripon

I still have ITV 3 which freezes with a perfect picure. There is practically no sound. I have no other appliances except the Central Heating. Five USA is also affected. Other digital programmes are fine. Any ideas?

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E Barron's 2 posts GB
Briantist
sentiment_very_satisfiedOwner

3:37 PM

E Barron: If you are using the Emley Moor transmitter, you might expect this to happen with multiplex A until switchover.

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Briantist's 38,844 posts GB
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