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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
BBC Three Linear channel re-opens1
Removing all barriers to communication between diverse cultures2
How do I get a test card with Freeview3
What can I do when my Sky Digibox says 'No Signal' or 'Technical fau4
Can I receive UK TV in Ghana?5
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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

Comments
Sunday, 17 June 2012
J
jb38
sentiment_very_satisfiedPlatinum

3:54 PM

John Bean: Its quite impossible for anyone to be able to offer assistance when you have failed to mention your location, this in the form of a post code or one from a nearby location e.g: a shop etc.

link to this comment
jb38's 7,179 posts GB
Monday, 18 June 2012
J
John J
11:58 AM
Milton Keynes

For the past ten days or so I am unable to receive various ITV channels (ITV 1 is OK), Film4 etc. My main TV is connected to a communal arial, another TV has a set-top arial and booster. Both have been OK until recently, with all digital TV and Radio channels working fine.

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John J's 1 post GB
M
Mark Fletcher
sentiment_satisfiedGold

5:37 PM
Barnsley

John Bean.As JB38 rightfully states we cannot be of help to you if you do not provide a full postcode preferably or a nearby location as such !

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Mark Fletcher's 673 posts GB
Tuesday, 19 June 2012
M
margaret donnelly
7:34 PM
Glasgow

Its a comunal. Outside aerial

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margaret donnelly's 2 posts GB
Thursday, 21 June 2012
D
dave
3:01 PM

Hi,
yesterday evening all programs were working perfectly and suddenly this morning woke up and all my tv channels are gone!! I only watch free channels ,and i don't have sky box.
I have Samsung tv, it keeps saying "weak or no signal" I checked all cable connections and used auto program to set up channels and got nothing! I'm in Manchester-Green quarter- M4 -Lord street.
Can anyone help please ??

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dave's 1 post GB
Saturday, 23 June 2012
J
Jon N
8:49 PM

My Freeview ITV signals all seem to have degraded over the last two weeks, particularly noticeable when Euro matches being played. My postcode is NR7 OTQ. Can you offer any advice of please?

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Jon N's 1 post GB
Monday, 25 June 2012
S
Sue
5:45 PM
Grimsby

We have never had a problem with freeview until this last week. All of a sudden we lost majority of channels and others are unpredictable. We have retuned the tv a number of times but some times we have 40 channels (still low) the next we have 11..... Our post code is DN41
I know Belmont was having some work last week but why hasn't this problem now been resolved??

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Sue's 1 post GB
Wednesday, 27 June 2012
C
Caroline
6:29 PM

I have just retuned, as suggested by adverts, as ITV3 had disappeared - now I have ITV3 but have lost ITV1, C4, C5. There were there before the retune. My post code is RH16 - please advise

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Caroline's 1 post GB
J
jb38
sentiment_very_satisfiedPlatinum

7:23 PM

Caroline: You should carry out a factory reset before retuning, factory reset also being called default setting on some devices. The post code provided, or to be more accurate part of the code, is not suffice for signal checking as it indicates that you can receive from more than one source.

If a factory reset / retune doesn't cure the problem then a full post code will be required, or at least one from nearby such as a shop etc.

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jb38's 7,179 posts GB
R
Rob Alka
11:56 PM

Postcode is OX29. I can get Ch4 on Sky via my satellite dish but since this evening (June 27) not on Digital TV, where the screen reports "no signal" for ITV and Ch 4. Therefore can't trust my Digital recorder to record a series on Ch 4 (The Killing). I don't believe there is anything wrong with the aerial. Ch 4 has often had a poor signal. What with the high % of the programme devoted to commercial breaks, the signal breakup makes Ch 4 a washout for viewing. As for ITV, there is seldom anything on their channels that I want to see. I do hope your moderator does not misconstrue any of this as disrespectful

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Rob Alka's 1 post GB
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