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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?
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
Monday, 27 April 2020
P
Peter
6:20 PM

It appears that since the retune to lower channels last year we loose reception when ever there is high pressure. There is clearly interference from Belgian transmitters as when these conditions occur we receive them. Obviously the new frequencies are not satisfactory. (note we our not the only ones affected)

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Peter's 1 post GB
C
Chris.SE
sentiment_satisfiedGold

9:13 PM

Peter:

What date was your retune? Which transmitter are you receiving?

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Chris.SE's 1,275 posts GB
Tuesday, 5 May 2020
G
geoff snowdon
10:21 AM

Intermittently having problems eg picture/sound breakup on all channels in the group which includes channel 12. Any known problems which c11ould cause this?

.

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geoff snowdon's 1 post GB
C
Chris.SE
sentiment_satisfiedGold

3:16 PM

geoff snowdon:

Without your full postcode it's not possible to know which transmitter(s) you may be able to receive and what the predicted reception is at your location. The Freeview Detailed Coverage checker does not work on place names or partial postcodes.
Channel 12 - we assume you mean Quest - is on the SDN multiplex, see Channel listings | Freeview
A lot of main transmitters around the country are currently listed for Planned Engineering with "Possible weak signal" and a number of relays listed with "Possible service interruptions" and any of this could result in the SDN multiplex (and others) being affected whilst work is in progress.

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Chris.SE's 1,275 posts GB
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