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
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
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

Saturday, 10 September 2011
9:59 AM
Newton Abbot

Hi I will definately read all the following pointers and have printed them out to digest (not very technically minded!) over the weekend but they all seem to be about a problem regarding a signal to the house affecting all TV's. I have a Freeview TV downstairs which was great when I first got it last year but now I am getting problems with it(constantly breaking up all the time on all ITV/4/5 channels-but BBC channels are ok.) In my bedroom I have a Freeview Box which is ok? Outside aerial in TQ12 6YG.
Many thanks,

link to this comment
Teri's 3 posts GB flag
Teri's: mapT's Freeview map terrainT's terrain plot wavesT's frequency data T's Freeview Detailed Coverage
Sunday, 11 September 2011
12:21 PM

Hi again, now ploughed thru all info and tried various options! Phew! No change! Only thing left is to check fuse in Booster which I will have to get looked at. Funny thing I noticed, don't know if it has and connection to problem but when I tried to do manual or auto tune it started at channel 21 to 68. I could not find channels 1 to 20? However, when it finished all channels there but still breaking up. Tried TV upstairs. Still breaking up on ITV channels but FV box didn't. Presume my TV is extra sensitive, make LOGIK? Any hints would be greatly appreciated!
Many thanks ,

link to this comment
Teri's 3 posts GB flag
2:19 PM

Right...! We have lift off! Discovered all channels missing were up in the 800's so did one final last re scan as per FAQ 1107051116 i.e. Unplugged TV and aerial, plugged TV in, auto scanned, then when empty, plugged aerial in and scanned again, all channels clear! Easy when u know how but would never have done it without the valuable info on this site! Cheers! Teri.

link to this comment
Teri's 3 posts GB flag
Sunday, 25 September 2011
11:51 AM

I re-scanned on 21st September and received all the channels. I was v happy.

On Thursday pm/Friday am the ITV, Ch4 etc channels disappeared and I can't get them back! I have tried the recommendation of retuning with no aerial and trying again, but no luck. My post code is ST15 and the aerial I use points approx SE, like everyone else.

Any help/ideas appreciated

link to this comment
Andrew's 1 post GB flag
Andrew's: mapA's Freeview map terrainA's terrain plot wavesA's frequency data A's Freeview Detailed Coverage

1:40 PM

Andrew: Try manually tuning in Mux Ch46, that being the ITV multiplex for Sutton Coldfield.

You might be best though to first of all blank out anything stored using the aerial out procedure, then after carrying out the manual tune on Ch46, storing as required, then just use the "add (or find) channels" to load the remainder back in.

link to this comment
jb38's 7,179 posts GB flag
Saturday, 22 October 2011
Steph Brown
11:57 PM

We tried the freeview reset procedure after discovering we had no ITV1, Channel 4 or 5. After rescanning we gained some channels but still were missing channels (at least), channel numbers 3-6.
The freeview is via a freeview TV with an aerial outside.
What else can we try or who can we contact to rectify the problem?

link to this comment
Steph Brown's 1 post GB flag
Monday, 24 October 2011
Thursday, 8 December 2011
Bill McGree
11:11 AM

I live at SN25 1QN ..... I can get all the BBC channels but no ITV channels. I have gone through the reset procedure,checked all the cables....nothing!!!!
PLEASE HELP, PLEASE HELP...........I am 74 and need my telly!

link to this comment
Bill McGree's 1 post GB flag
Bill's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
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.