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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?
Can I attach a Freeview digibox to a Combi TV/Video unit?1
My high gain aerial can't get all the Freeview channels I expected2
I can't get Freeview yet, when will it start in my area?3
Are there plans to extend the range of regional variations on Freeview?4
How can I Receive Freeview on two TVs using one box?5
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

Saturday, 28 September 2019
Monday, 25 November 2019
John Gray
12:31 PM

During the last few days all free view channels keep breaking up. As I live in the BN13 area between the Brighton and I.O.W transmitters I have tried repositioning the aerial and have checked all connections to no avail. The I.O.W transmitter gives the best signal which on my receiver reads signal good quality poor, why? The aerial is a high gain and is positioned outside on a mast about 20' high.

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John Gray's 2 posts GB

1:34 PM

John Gray:

Without a full postcode we cannot tell what Freeview are giving for your predicted reception of which multiplexes from which transmitters at your location. If it's the Worthing area, you could be at a bit of an awkward spot if you are trying to get all 8 main multiplexes.
Is this poorer quality on all multiplexes?
If you happened to do a retune when signal was weak or off-air due to transmitter maintenance then you may have picked up a weaker transmitter.
Are the rods on your aerial vertical or horizontal? I assume you are aiming to pick-up Rowridge?

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Chris.SE's 718 posts GB
John Gray
2:09 PM

gainChris.SE. Hi Chris, have tried Brighton with vertical elements with no luck and am at present using a high gain group A on the IOW have tried with the aerial mounted horizontally but am getting better reception with it mounted vertically. Signal reads very good but quality poor.

link to this comment
John Gray's 2 posts GB

9:14 PM

John Gray:

Well that's the right approach using a Group A high gain for Rowridge, and very often the VP transmissions are better in some places. But without a full postcode it's not possible to give some proper constructive advise. The Freeview Detailed Coverage checker doesn't work on partial postcodes or place names, and coverage around the location that you are likely to be in can be very variable.

link to this comment
Chris.SE's 718 posts GB
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