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My ITV/C4 Freeview channels have disappeared - what can I do? Is it my SCART ca

My ITV/C4 Freeview channels have disappeared - what can I do? Is it my SCART cable?

My ITV/C4 Freeview channels have disappeared - what can I do?
published on UK Free TV

It is a feature of television signals that they can be effected by the weather. Aside from the obvious damaged that can be caused by wind or torrential rain, the onset of summer can cause a more intriguing problem called "inversion".

Basically, when the sun heats up the land, the hot air can get trapped below cold air at high level. This creates an "inversion layer" which acts like a polished mirror to TV signals. This causes two problems: you can receive both the original and a reflected signal from your own transmitter (on analogue TV this appears as "ghosting") or interference from TV transmitters that are normally too far distant.

The ITV/C4 multiplex of channels (ITV-1, ITV-2, ITV-3, ITV-4, CITV, C4, More4, E4, Quizcall) use a transmission "mode" called 64QAM, and it is sadly much more prone to these problems.

So, whilst a loft-mounted aerial will provide reception at some time, it will fail at others. The only real solution is to mount the aerial (or a new Class I aerial) outside on a pole, but some people report that changing the cable from the aerial to the set-top box to the high-grade satellite cable can also help.

The SCART connection, by the way, only carries a single TV picture, not the Freeview transmission multiplexes, so if this is disconnected it will result in degradation to every channel at once.

All questions
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In this section
My Freeview box has no EPG, is blank on FIVE, ITV3, ITV4, ITV2+1, has no sound o1
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Saturday, 1 January 2011
2:19 PM

I have an digital arial on the roof going to a booster box in the loft 2 of the tv's work fine with freeview and ITV but the other tv gets freeview but no ITV Channel 4 or 5 and the tv is only about 15months old any ideas


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dave's 1 post GB flag
Thursday, 6 January 2011

7:59 AM

dave: Try disconnecting the "booster box in the loft" from your system.

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Briantist's 38,899 posts GB flag
Saturday, 15 January 2011
9:23 PM

We have recently lost all the channels on multiplex 2, which includes ITV 1 and the rest, we have a TV upstairs that isn't linked to the roof aerial, and altho we can get the channels the reception isn't great, we had the channels downstairs perfectly until 2 days ago when they have vanished. Any help greatly appreciated.

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Mike's 1 post GB flag
Mike's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
Sunday, 16 January 2011
8:04 PM

It is the same here. I updated to get ITV +1 on Fri night and then today I can't get any ITV Channels, Channel 4, etc. I hope someone can help.

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Michelle's 13 posts GB flag
Monday, 17 January 2011
gwen owen
2:00 PM

I have the tv guide, landscape, on my screen and channel numbers but no listed freeview programmes. How do I get them back please?

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gwen owen's 1 post GB flag
Thursday, 24 February 2011
12:08 PM

I have a Freeview box and until a few days ago i could receive every channel. however, for the past 3 days itv1, ch4 and ch5 have been blank! why??

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HEATHER's 1 post GB flag
HEATHER's: ...
Ian Rangeley
12:45 PM

Ref freeveiw retuning probs. I have had these probs with all my neighbours when you tune one new channel in you loose some of the others, the secret is to do a complete new installation. The memory is then wiped and only the new channels and their correct location is saved, this may involve pulling out the mains plug from you box/tv wait a few minutes then plugging in and doing a new installtion, hope this helps

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Ian Rangeley's 3 posts GB flag
Ian's: mapI's Freeview map terrainI's terrain plot wavesI's frequency data I's Freeview Detailed Coverage

1:54 PM

HEATHER: Please see Single frequency interference | - independent free digital TV advice .

You are in a poor area for Freeview reception, you might expect this to happen.

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Briantist's 38,899 posts GB flag
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