menuMENU    UK Free TV logo Freeview

 

 

Click to see updates

High pressure causing channel loss through "Inversion"

High pressure does not just bring cold at this time of year, it is causing quite random loss of Freeview and analogue reception.

High pressure does not just bring cold at this time of year, it
published on UK Free TV

There is high pressure over the whole of the UK at the moment, and this causes the Inversion Effect. This is causing people to be missing a single Freeview multiplex, or have terrible analogue reception on a single channel. The problem may come-and-go or last for several days.



For details, please see What is the Inversion Effect and why does it effect my Freeview TV reception?.



Help with Freeview, aerials?
How do I get a test card with Freeview1
I would like to know if it is possible to receive UK terrestrial Freeview servic2
I have been told I would receive too much singal from my Freeview tansmitter as 3
Can my Freeview box receive more than one BBC and ITV region?4
Is it true that my 87 year old mother is entitled to a FREE upgrade when the ana5
In this section
Official aerial installers guide to the TV spectrum future1
Which free digital TV system will give me the most reliable reception?2
Digital Region Overlap3
Freeview reception has changed?4
Two frequency interference 5
Single frequency interference6

Comments
Wednesday, 4 April 2012
G
Gillie
9:39 PM
Wellington

Please help. Since the digital changeover I can no longer receive ITV3, which was working fine before the changeover. I have retuned numerous times but, although I can get it upstairs, I simply CANNOT persuade the downstairs television to tune to ITV3. I live in a TA21 (Wellington, Somerset) area.
with grateful thanks for any suggestions.

link to this comment
Gillie's 1 post GB flag
Gillie's: mapG's Freeview map terrainG's terrain plot wavesG's frequency data G's Freeview Detailed Coverage
Dave Lindsay
sentiment_very_satisfiedPlatinum

10:50 PM

Gillie: The Commercial channels (which include ITV3) increased in strength from Mendip on 28th March. Have you tried a full retune since then?

If that still doesn't work, then if you can manually tune, do so to channel 48. Indeed, you could even try doing it before you retune.

Alternatively, take the downstairs TV upstairs (if you can) and tune in and bring it back down.

link to this comment
Dave Lindsay's 5,724 posts GB flag
Thursday, 5 April 2012
J
jesgreen
9:40 AM
Cheltenham

I have lost all BBC TV and radio channels over the last 2 weeks. Initially there was signal break up but now no signal at all.
Film 4 also affected.
I have normal ITV channels and channel 4.
Oxford transmitter, has been working well for several years. Same equipment.
I have disconnected power and aerial and retuned to no effect.


link to this comment
jesgreen's 1 post GB flag
jesgreen's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
G
Gill
12:21 PM

We live BH23 area of the New Forest.Receive from Rowridge. Yesterday we lost all our digital reception. both tv's said check ariel. We went to the local tv repair to buy a new booster and were quoted £60 (the booster had been receiving intermittently but settled if the wires were tweaked, now no reception at all) The engineers at the shop said that the signal was still being increased and we may end up requiring a reducing transmitter. wait until April 15 or 16 because there may also be some interference from a French switch over. This seems 1. rather a long time to wait without tv. 2. Rather an expensive booster. 3. Surely this cannot be true that the signals are still changing after the big switch overs last month.

link to this comment
Gill's 1 post GB flag
K
Karen
12:33 PM
Surbiton

Just called Digital UK for advice... we are in SW London receiving our rooftop aerial signal from the Crystal Palace transmitter. Usual problems cited here, no signal, loss of picture, terrible pixellation/freezing of picture etc... affecting all channels despite retuning with and without the aerial.

Digital UK have never heard of Inversion, or interference that affects signals. A very worthwhile call. What I need to know is will this continue after full switchover when we are not under a low pressure system? If so, what's the best method of getting TV (Sky is not an option for so many reasons; Virgin I keep hearing dodgy reports of....).

Thanks!

link to this comment
Karen's 1 post GB flag
Karen's: mapK's Freeview map terrainK's terrain plot wavesK's frequency data K's Freeview Detailed Coverage
Dave Lindsay
sentiment_very_satisfiedPlatinum

12:53 PM

Karen: Inversion will always happen and has always happened. The question I think you're asking is whether it will happen to such a degree as to make your TVs unwatchable.

That's a difficult, if not impossible, question to answer.

What I will say is that you appear to be in an excellent area with regards level of signal from Crystal Palace once it has switched over to full power on 18th April.

A lot of the issue comes down to the level/strength of the signals you wish to receive (i.e. those of CP) versus the level/strength of those which are interfering. The level of CP's will go up on 18th April.

link to this comment
Dave Lindsay's 5,724 posts GB flag
Sunday, 8 April 2012
M
Martyn
10:14 PM
Boston

In the evenings my picture and sound keep freezing (atmospherics?), I had an aerial profesionaly installed about 2 years ago in anticipation of the digital change over,anolgue was not a problem, I am between boston and spalding in lincolnshire so quite a way from the transmitter (belmont?) which is north of me, I have tried a signal booster but it made no difference, what can I do about this problem as the wife is not happy as it often plays up when her soaps are on! (The end of her world!)

link to this comment
Martyn's 3 posts GB flag
Martyn's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
D
Dave
10:30 PM

No Film4 or Film 4+1, No Yesterday or 5 USA+1. I was once asked why I wanted to live in Ammanford West Wales, I am begining to ask myself the same question what's the point of a digital switchover when you have picture bleed Pixilation and very few channels during Inversion. 100 channels of constant repeats it's just not worth the TV licence no wonder there are so many sky dishes on properties these days. Roll on 3D TV at least we can then be heartily sick for a reason

link to this comment
Dave's 1 post GB flag
Monday, 9 April 2012
M
Martyn
5:52 PM
Boston

Can high pressure causing channel loss through "Inversion" affect freesat ?

link to this comment
Martyn's 3 posts GB flag
Martyn's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
J
jb38
sentiment_very_satisfiedPlatinum

6:42 PM

Martyn: No! as it only affects lower frequencies such as used by Freeview.

link to this comment
jb38's 7,179 posts GB flag
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.