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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 by 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.







Your comments: most recent posts are at the bottom

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Your comments are always welcome. Please use the form below to add your thoughts or questions to this page. We will get back to you as soon as we can.

G
Grace
Friday 17 October 2014 7:50PM

My TV has been coming up with no signal notice please can anyone advise what I need to do to get signal as I have tried all the necessary .....

M
MikeB
Friday 17 October 2014 8:41PM

Grace: Your signal is so low in power its not registering or is gone completely - usually your aerial system has a problem, which is what its telling you. Read the manual for the TV, and it will tell you this. Check back from the back of the TV (to make sure the lead hasn't fallen out). If it looks OK, your probably going to have to call a professional.

J
jason
Sunday 19 October 2014 10:14AM

I've had no problems until this weekend I'm getting interference on itv and channel4 i live in olton solihull b92 7rq does anybody know why this would be happening cheers jas

M
Marianna
Sunday 19 October 2014 5:01PM

Hi

I live in g58pn. My tv freeviw had no signal. I moved the scart plug and now I have bbc one and two etc but missing itv, channel four film four etc. Can you advise ?

J
jb38
Sunday 19 October 2014 6:34PM

Marianna : If moving the scart plug resulted in you receiving BBC1, then all this is liable to have done is to restore the link between the box and your TV, or if "not" using a separate box? indicate that the aerial connection on the rear of the TV requires checking, pull it out then in again a few times as this action cleans the connection.

If though you "are" using a box, then the scart lead is not connected in any way with reception, therefore irrespective of whether using a TV or a box carry out a "first time installation", this also known as "default setting" or "reset", followed in the latter two cases by carrying out a normal auto-tune.

By the way, are you connected into a communal aerial system, if you are? and still cannot receive anything other than the BBC channels after having carried out the aforementioned, check with one of your neighbours to ascertain if they are also experiencing a similar problem.

jb38's 6,044 posts
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M
Marianna
Sunday 19 October 2014 7:36PM Glasgow

Thanks. It is a communal ariel but not wanting to chap neighbours door just yet. I did all those checks and still not got this channels. Thinking it's maybe the weather with main ariel ? When watching bbc2 tho it does occasionally jump and say no signal and come right back on again !

J
jb38
Sunday 19 October 2014 11:50PM

Marianna: I fully appreciate your reluctance as far as making an enquiry with a neighbour is concerned, as many residents in an apartment block quite understandably like to retain their privacy, likewise do not particularly wish to have contact with anyone residing in close proximity to them, and indeed in many cases for very good reason!

Its just that when anyone linked into a communal aerial system is experiencing reception problems they are somewhat limited in what they can do by not having any control over the aerial system, that is with the exception of checking the jumper lead from the wall socket into their TV or box.

If though the jumper lead appears to be OK, then its likely that other residents in the block are also liable to be suffering from the same problem as yourself by being linked into the same system, not knowing whether they are or not being the only reason for enquiring elsewhere.

jb38's 6,044 posts
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D
Dave James
Thursday 23 October 2014 8:01PM

Why is the ITV (& CBS) signals so poor on my FreeSat... other broadcasters like the BBC are just fine? I tried watching ITV4 European football games... it was hopeless quality, when the plays moved it was just a blur and the grass looks just luck a smudge. I had to switch it off in the end. Surely there is a minimum quality that broadcasters must adhere too?

J
Julian
Friday 24 October 2014 12:11PM

My digital itv and channel 4 channels are intermittent. They work some of the time but the majority of the time show no signal. I live in the SA14 area. Can you give me some guidance. Thanks

Dave Lindsay
Friday 24 October 2014 12:53PM

Julian: The most likely and therefore first thing to check would be that it is tuned to the correct transmitter, which is the one to which the aerial faces. The tuned UHF channel and/or frequency in MHz is usually given on the signal strength screen. Check that this matches that of your desired transmitter.

More guidance can be given with knowledge of that transmitter, or at least a postcode and direction of aerial which should allow the transmitter to be determined.

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