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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?
My Freeview box has no EPG, is blank on FIVE, ITV3, ITV4, ITV2+1, has no sound o1
My ITV/C4 Freeview channels have disappeared - what can I do? Is it my SCART ca2
I have now lost all signal can you tell me what the problem might be?3
Is it possible to receive freeview cahnnels via a broadband internet connectio4
I am missing a transmission multiplex?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

Comments
Tuesday, 14 February 2017
MikeP
9:03 PM

Stephen:

Your signal strengths are too low, hence the break up problems. You need to correct the aerial fault that is causing it, try having you aerial repositioned so it is aimed more accurately at the transmitter, or replace the aerial with a higher gain one, or fit an aerial amplifier in the cable. Ideally you want between 60% and 85%. Because the signal is weak, you are not seeing the low power multiplexes.



link to this
MikeP's 1,302 posts Gold Gold GB
Tuesday, 21 February 2017
J
John
12:08 PM

Hi
Over the past couple of weeks our freeview reception via a YouView box has got worse and worse.
Signal strength has reduced from 70% to 30% quality is 100%. EX85HW receiving from Beacon Hill.
If I go back to my Humax box then although the signal levels are about the same the picture is virtually interference free.
Any ideas please?

link to this
John's 3 posts GB
M
MikeB
2:14 PM

John: Your aerial system has a fault, and its just that one box (the Youview box is made by Humax anyway) is slightly more forgiving, for whatever reason. But your still about to loose signal.

link to this
MikeB's 2,047 posts Platinum Platinum GB
Thursday, 23 February 2017
J
John Ireland
3:05 PM

I have two Humax PVR 9300T connected to my two televisions via a aerial splitter. One has been connected for many years and the second one was connected 3 weeks ago (after failure of my previous Bush PVR) and had a perfect picture after manual tuning this has worked perfectly until last Wednesday when on the smaller TV in the dining room suddenly kept getting a frozen picture for a second or so with normal sound. It also occasionally came up with a message something like 'no or weak signal'. My main TV in the lounge has not had the same problem. This only occurs on the ITV programmes-3, 4, & 5-BBc 1 and 2 is not affected. I notice you had a weak signal last week. Is this anything to do with my problem?
I assume you realise I am directed at the Mendip Transmitter not Wenvoe.
Many thanks.

link to this
John Ireland's 1 post GB
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