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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
I have now lost all signal can you tell me what the problem might be?2
I have a Durabrand cg5660-m and I need the lock key code!3
What is the Inversion Effect and why does it effect my Freeview TV reception? 4
My high gain aerial can't get all the Freeview channels I expected5
What are the aerial types about? Are they high-gain?6

Sunday, 30 November 2014
4:40 PM

D Hawthornthwaite: Found problem could be due to recently activated 4G phone mast. Contacted
Will wait to see if this is cause of problems. They fit a filter free of charge if it is the mast causing Freeview problems.

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Diane's 2 posts GB flag

7:04 PM

D Hawthornthwaite: You havn't given a postcode - so we dont know if your very close to the trasnmitter, and getting too high a signal, have a problem with your aerial, etc. It might be 4G, but generally, if you were going to have a problem, they would have sent you a filter.

One clue is they they have been doing engineering to the transmitter - when that happened last year, the signal strength generally went up and a lot of people complained about much the same thing as you are.

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MikeB's 2,579 posts GB flag
Monday, 1 December 2014
9:48 PM

Recently my freeview reception has become pixilated and has bad sound breakup, usually unwatchable, BBC1 is sometimes OK, my postcode is CM16 7JZ, I have a decent loft ariel with a splitter / booster box, Pat

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Pat's 2 posts GB flag
Pat's: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
Dave Lindsay

11:06 PM

Pat: Trees maybe?

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Dave Lindsay's 5,724 posts GB flag
Sunday, 28 December 2014
11:30 PM

My free to air sky box has stopped receiving BBC 1 BBC 2 BBC 4 channel 4 channel 5 and various others. Can still get itv 12,3,4 and BBC 3. Any particular reason?

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Henderson's 1 post IE flag
Tuesday, 10 February 2015
Wendy clink
8:58 PM

Why could I not get any BBC programmes tonight after 7p.m. .?
I watch on a freeview tv through a Humax recorder. This has horned before- every evening around 7p.m.
No BBC then it comes on later 10p.m.
It comes up on screen - this channel has been scrambled or not available

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Wendy clink's 1 post GB flag
Saturday, 14 February 2015
Graeme newbold
7:21 PM

My mother has lost ITV channel 4 and 5 .do you know why?

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Graeme newbold's 1 post GB flag

11:58 PM

Graeme newbold: The problem could possibly be down to a glitch on the PSB2 transmitter that covers your mothers area, all programme channels mentioned being broadcast by this transmitter. However, its impossible to check the status of the transmitter in question without having knowledge of your mothers location, this preferably in the form of a post code or one from nearby, e.g: a shop / post office.

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jb38's 7,179 posts GB flag
Monday, 23 February 2015
9:04 AM

how can I connect TV with 1 scart, Digibox with 1 scart with VCR I am no techie at all so 1 step at a tiem

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marion's 1 post GB flag
1:39 PM

jb38: HI, I can no longer receive ITV nor CH 4 on one TV but can get both progs. on a TV in another room. Could it be a transmitter problem? My post code is HP226 LJ...,
Would appreciate your help!!

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Eve's 4 posts GB flag
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