menuMENU    UK Free TV logo Help!

 

 

Click to see updates

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
Can I attach a Freeview digibox to a Combi TV/Video unit?1
My high gain aerial can't get all the Freeview channels I expected2
I can't get Freeview yet, when will it start in my area?3
Are there plans to extend the range of regional variations on Freeview?4
How can I Receive Freeview on two TVs using one box?5
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
Tuesday, 15 January 2019
S
Steve
1:10 PM

What is happening to digital TV - these problems never occurred with analogue, if and when they did we were notified with some sort of test card.

It would appear that when digital goes down, hard cheese and we are left to wonder whether our equipment is failing or is it transmitter trouble?

I have a humax pvr and a panasonic DVD recorder both fitted with freeview.

At present the BBC channels, ITV channel 4 and 5 and other channels on that bandwidth are working.
I was hoping to watch the Bill on the drama channel (20), but this channel has the "no signal or scrambled message" showing.

I have recently had a new log aerial, co-ax cable, and connections fitted, all were giving 54% for strength and bouncing up and down between 40% - 90%, with picture freezing and or pixcellating.

When it rains constantly this seems to be the norm.

Totally dreadful and no one can be contacted to query if there is anything wrong.

The last time it happened my wife checked on line and it stated there were no issues, so where was our channels?

About half an hour later they were back.

link to this
Steve's 1 post GB
Saturday, 19 January 2019
K
Kathryn Davies
10:57 PM

Our ITV channels and 5 channels have pixelated with no signal messages but all the BBC channels and some others are working fine so I'm assuming it's not my Ariel, this happened a few weeks back too then came back a few days later but it's a nuisance when we watch mostly itv and 5 channels....why is this happening?

link to this
Kathryn Davies's 1 post GB
Sunday, 20 January 2019
S
StevensOnln1
10:53 AM

Kathryn Davies: You haven't said where you are or which transmitter you're using so we can't check for any reported problems, but the most likely explanation is that you have a fault in your aerial system such as a loose or damaged cable or connection somewhere. Start by unplugging, checking and refitting the aerial lead behind your TV, then work your way back as far as you can safely access toward the aerial.

link to this
StevensOnln1's 2,286 posts Platinum Platinum GB
Sunday, 27 January 2019
H
Helen Fitz-Harris
10:41 AM

Some of my Freeview channels are missing. and I am getting the Welsh version of Channel 4! What can I do to restore my channels?

link to this
Helen Fitz-Harris's 1 post GB
S
StevensOnln1
10:56 AM

Helen Fitz-Harris: That sounds like your TV has retuned and picked up a Welsh transmitter (I assume you mean you're receiving S4C which is completely separate to Channel 4). If your provide a full postcode or can tell us which transmitter you normally receive, we can advise how to manually retune your TV back to the correct region. It's also worth checked that you don't have any loose or damaged cables or connections behind the TV which may cause the signal from your usual transmitter to be weaker than normal.

link to this
StevensOnln1's 2,286 posts Platinum Platinum GB
Select more comments

Your comment please
Please post a question, answer or commentUK Free TV is here to help people. If you are rude or disrespectful all of your posts will be deleted and you will be banned.







Privacy policy: UK Free Privacy policy.