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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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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, 13 October 2012
7:06 PM

john29/09 7.01pm no reply

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john's 3 posts GB flag

8:11 PM

john: When you say that an indoor aerial picks up the missing programmes but loses BBC, are you meaning if you carry out a rescan when the indoor aerial is being used?

As you haven't provided your exact location I have used a test code of 6EW, and on this it appears that this location is capable of picking up Ch54 from Waltham (@ 23 mls), Sutton Coldfield (@ 40mls), Belmont ( @ 48 mls) but with your local Nottingham transmitter being located at only 4 miles away, this creating the situation whereby your TV's tuner could be picking up muxes from different stations and at various signal levels, this possibly being responsible for the somewhat odd problem you are experiencing.

As far as your normal aerial is concerned, do you know where your aerial is facing? and if you can actually see it, is mounted horizontally or vertically? (elements top to bottom)

The other point is, does your TV (model number of unknown) have a manual tuning facility? as the only way around your problem might be to manually tune in the six muxes one at a time.

Finally, is the normal main aerial yours or a communal one?

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jb38's 7,179 posts GB flag
Sunday, 14 October 2012
4:06 PM

my post code is ng156pu,I have adjusted aerial,get a picture on itv etc.use remote to change to say bbc,when i go back to itv it is not working again.changed aerial cable to sat cable itv works ok .change to another none c54 channek eg pic tv,when i go back to itv not working again.what channel numbers are the other transmitters.aerial is a 52 element havnt a clue wether upside down or not,but followed drawing when put together.thanx

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john's 3 posts GB flag
john's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage

11:58 PM

john: If you are receiving Freeview from Waltham (131 degrees @ 23mls) then the channels are as follows / 61(BBC) - 54(ITV1) - 58(HD) - 29(SDN / ITV3) - 56(ArqA / Pick TV 11) - 57 (ArqB / Film 4) Nottingham: (197 degrees aerial vertical @ 4 mls) 27 - 24 - 21(HD) - 51 - 52 - 48 Sutton Coldfield: (220 degrees @ 40 mls) 43 - 46 - 40(HD) - 42 - 45 - 39. Belmont: (63 degrees @ 48 mls) 22 - 25 - 28 - 30 - 53 - 60 By the way, on the given post code you are indicated as being able to receive all stations mentioned, although SDN (ITV3) from Belmont is variable because its operating on low power at present.

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jb38's 7,179 posts GB flag
Friday, 19 October 2012
sonya mackay
6:21 PM

I always have to re-tune to get itv3. but, as from this afternoon, I cannot get 10, 11, or 12. Nothing between 15 & 28, then nothing between 33 to 70,

Why is this?

I live in a 6 storey block of flats on Hove .seafront

postcode BN3 4HF

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sonya mackay's 1 post GB flag
sonya's: mapS's Freeview map terrainS's terrain plot wavesS's frequency data S's Freeview Detailed Coverage
Kev B
8:56 PM

Hi there. I retuned my Freeview TV today and have lost ITV1, Channel 4, Channel 5 (no great loss to be fair) and a few others. I live in TW14 9NT.

Anyone know if I can get them back?

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Kev B's 1 post GB flag
Kev's: mapK's Freeview map terrainK's terrain plot wavesK's frequency data K's Freeview Detailed Coverage
Wednesday, 24 October 2012
12:28 AM

I HAVE MY TV SAMSUNG 19" before i was watching all my chanells(5) ,, from any day stop and now i realise that here in london we have plenty freeview chanels, and saddly i cant see any.....i do it all the process, that include auto and manual store, still the problem, by the way i have the small indoor antena, as usual as use before.....thank u for any help

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ELIZABETH's 1 post GB flag
3:32 PM

Our channel list for channel 1,2,3 & 4 keeps changing from RTE1, RTE2, TV3, TV4 to BBC1, BBC2, UTV and C4. We want it to stay at BBC1, BBC2, UTV and C4. When we returned this morning it was fine but now it has changed to RTE1, RTE2, TV3, TV4. How do we change this back to BBC1, BBC2, UTV and C4? We are using a set-up box connected to an aerial in the loft.

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Nathan's 1 post GB flag
Thursday, 25 October 2012
5:44 PM

hi,before the switch over i could recieve film4 /Quest,5/5us,sinse i retuned i cannot get these channels,

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stephen's 1 post GB flag
stephen's: mapS's Freeview map terrainS's terrain plot wavesS's frequency data S's Freeview Detailed Coverage
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