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Freeview reception has changed?

Why should my Freeview reception change when I have not changed anything?

Why should my Freeview reception change when I have not changed
published on UK Free TV

From time to time people find that their Freeview box, integrated set (idTV) or Personal Video Recorder (PVR) has lost many channels without any apparent changes.

There are a number of factors to consider

Freeview is broadcast on digital multiplexes. This means that, once broken down into a stream of bits, each television channel is combined into a single transmission of 1s and 0s. This means that reception is of the multiplex first if this is lost it affects all the channels in the multiplex in the same way.

The signal strength received by the box or TV for a particular multiplex from a given transmitter determines if the data can be received or not. So, a poor signal results in no data, an adequate signal in perfect data and a low signal in either none or all.

Poor digital signal levels do not result, as they do with old-fashioned analogue television, in a sub-standard picture or sound. Poor signals often result in a perfect data-stream, but are prone to periods of no reception. Sometimes this will be for hours, but can also be several times a minute when caused by induction from fridges, freezers, central heating systems, two-stroke scooters, baby monitors and so on.

If you have lost ALL your Freeview channels

First disconnect the aerial lead from the Freeview box or TV set and reconnect it and then follow this reset procedure to scan for channels again. If this does not result in services being restored, check the Freeview transmitters page to see if there are any engineering problems with your local transmitter.

How to check all cables, connectors and aerials

The RF connectors need to be in very good condition to work. There are two general types:

Factory-fitted connectors are very reliable as they cannot easily be taken apart, but they can be damaged by wear and tear. On the female-type the central section is often composed of two parts which can often be forced apart, resulting in a poor connection you can push them back together if this has happened with a pair of tweezers. On male connectors if the central pin is damaged, you will need a new cable. If there are any loose partials in the connector, remove them.

Another problem with these cables is that quite easy to sprain the connector at the back which causes little obvious external damage, but disconnects the internal connection. This happens often when a set-top box is pushed backwards into a cabinet.

Hand made cables can also suffer from similar problems to factory made ones and they are also prone to accidental damage from a cable being pulled. If such a connector is not firmly attached to the cable, the connector may need refitting.


Make a visual check of the cables. There are a few basic checks:

If the cable has been slashed or cut, it will not be very effective or reliable. If such a cable is fitted externally, this can allow rainwater to enter the cable and this will reduce the signal levels.

You can easily damage an RF cable by crushing it, for example in a door. If the outside of the cable has a permanent kink in the cable or has been very tightly looped, this could be the site of damage.


For reliable and effective Freeview reception, a rooftop aerial is required. It is hard to make a visual check of such an aerial without putting yourself in potential danger.

You can make a visual check of the route between the aerial and the transmitter. Any form of obstruction will damage the digital signals. In particular trees coming into leaf, as these will leech the signal before it reaches your aerial. This applies to both trees adjacent to the aerial and at a distance.

Another common problem in cities is building work. A large crane will often change position many times during the day, and if this is between your aerial and the transmitter this can reduce the signal levels in an unpredictable way.

If your system uses a booster, the power may have failed. Check the fuse to the power to the booster.

Weather problems

There are two main weather problems that effect Freeview reception.

The Inversion Effect: please see What is the Inversion Effect and why does it effect my Freeview TV reception?

Wind: high winds sometime can dislodge the aerial this results in a poor signal.

Rain: poor or old cables can fill with water and this results in a poor signal. If this happens, the cables will require replacement.

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
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
Two frequency interference 5
Single frequency interference6

Saturday, 17 September 2011
lee chappell
9:52 PM

hi, i had issues on the 15th sept, when channel 4, 5 and a few others dropped off. I rescanned and couldn't pick them up. A few hours later, after another rescan. They came back.
But in the process, I've lost, what looks like, all the channels A band. A rescan still doesn't pick it up even today.
I was wondering if this could just be down to an issue in the wiltshire area or some thing.

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lee chappell's 1 post GB flag
11:02 PM

Before the switchover, had analogue, digital/ freeview channels. Having re-tuned on wed, seem to have lost some channels (itv3, and what looks like band A) even though they were there beore the switch over, and have gained band C. How can i get back itv3?

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Heather's 1 post GB flag
Heather's: mapH's Freeview map terrainH's terrain plot wavesH's frequency data H's Freeview Detailed Coverage
11:27 PM

Hi Brian

Like Heather, since Step 1, I have lost all Mux A and ITV-3, is this a temporary thing, will I get them back after Step 2 sort out?

I have a Technika Advanced Tesco box, and a search for an upgrade produces nothing.

Location is WR9 7LE, and have had fairly reliable reception so far.

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David's 3 posts GB flag
David's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
Wednesday, 21 September 2011
1:49 AM

Well, All my channels have gone. Can I claim on my contents insurance if I need a new aerial/ roof/ freeview box? I have retuned six times in the last 2 hours and have nothing at all....oh, and just paid a years TV licence fee. Depressed and disappointed by the whole event, especially as have also lost everything I had recorded using my Humax as well.

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Cait's 1 post GB flag
Cait's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage
9:19 PM

Our Sony KD-28DX4OU ceased to function ( we live in Coventry) on switch over day today ( 21st Sept 2011). After trying everything we paid for an experienced technician to come out who also did all the checks and tested our aerial etc and concluded the Sony would no longer function as a digital TV. We even tried our son's little set which worked perfectly using the same aerial and plug socket. The Sony, however, would just not function. In desperation, we tried a box top and it is now working but it's much less user friendly.
We are totally perplexed. Sony has always had a good reputation but this is very worrying and I would appreciate your help.

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Catherine's 1 post GB flag

9:32 PM

Catherine: Yes, the Sony KD-28DX4OU is on the condenmed lists - see TVs and boxes that do not support the 8k-mode | - independent free digital TV advice .

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Briantist's 38,907 posts GB flag

9:35 PM

David: You should have ALL of the services, can you please see Single frequency interference | - independent free digital TV advice ?

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Briantist's 38,907 posts GB flag

10:43 PM

lee chappell: It's a bit hard to suggest anything without a full postcode.

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Briantist's 38,907 posts GB flag
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