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Good weather reception problems

Messages: 21 - 20 of 40
  • Message 21. 

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    Posted by dod19 (U14705887) on Saturday, 13th July 2013

    Many thanks for the info. We have been losing channels 'no signal' etc. for 2-3 weeks and thought the problem was due to recent work on G4 mobile mast instead I now learn it is due to high atmospheric pressure and there's obviously no remedy.

    Quandary - future hot summers = poor television reception = reduction in TV Licence?

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  • Message 22

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    Posted by The Neanderthal (U2299133) on Sunday, 14th July 2013

    High pressure particularly in the summer means that radio waves are ducted in the atmosphere so they go further ....
    As there has to be frequency reuse - this means that some signals do interfere... although (in technical terms less with digital than with Analogue)
    the BBC has this advice
    faq.external.bbc.co....

    the key information is

    Do not attempt to auto-tune your set.

    If you have already retuned you may need to complete a manual retune to restore usual services. Visit the Digital UK website for details on this process.www.digitaluk.co.uk/...

    We just have to grin and bear it - but the problem is usually worse with older and indoor antennas....

    Ashleyhr -in S London looking a Crystal Palace you should not have any problems ...
    if it is all channels it is not the weather! 
    An old familiar problem. Unfortunately the UHF bands are now crowded, so if high pressure extends the range of co-channel transmitters there are problems. Unfortunately with digital it's not possible to see there is interference, when it gets too strong the picture breaks up completely thus the viewer has no idea why it has vanished. At least with analogue, the trouble was there to see, and if not too severe could be tolerated.
    An anticyclone on 28th Feb 1968 positioned itself over Northern Germany with spectacular results. There was a test card or local emblem on every channel from 21 to 68, with some carrying two or more programs, which could be selected by turning the aerial. We were getting ready for color and so was Europe, thus some of the pictures were in color. Transmissions were also received from France, Holland, Belgium and Sweden. Many photos were taken and I still have them to this day.
    Of course now we are digital and with many UK stations on UHF, such long distance reception is now less likely, we just have to live with the interference. The present anticyclone will eventually decline and move away to give gardeners much needed rain and viewers constant pictures once more.

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  • Message 23

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    Posted by old git at 70 (U14213449) on Friday, 2nd August 2013

    I get my tv signals from the Oxford transmitter and the pictures for the BBC multiplex have been ok but Channel 4 has all but disappeared. The Channel 4 mulitplex is not very robust it seems. I checked my tv this morning and there was no signal. We have had established high pressure systems before but I cannot remember such a lengthy disruption. I want to see a couple of programmes on Channel 5 but no joy. Digital Tv is not akll that it is cracked up to be.  If that is the case we seem to be going backwards.
    in the stone age of tv VHF 405 lines black& white only, used to be affected by the weather. UHF 625 & colour seemed to stop that.
    here in the Northwest Digital signals could be variable until analogue was switched off and Digital put up to full power
    were have both Sky and ground station digital , in a bad rain storm the sky signal disappears but ground based digital is fine. admittedly we are no more than 20 miles from the Nether Kellet relay transmitter

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  • Message 24

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    Posted by Onslow The Cat (U13672446) on Friday, 2nd August 2013

    I get my tv signals from the Oxford transmitter and the pictures for the BBC multiplex have been ok but Channel 4 has all but disappeared. The Channel 4 mulitplex is not very robust it seems. I checked my tv this morning and there was no signal. We have had established high pressure systems before but I cannot remember such a lengthy disruption. I want to see a couple of programmes on Channel 5 but no joy. Digital Tv is not akll that it is cracked up to be.  If that is the case we seem to be going backwards.
    in the stone age of tv VHF 405 lines black& white only, used to be affected by the weather. UHF 625 & colour seemed to stop that.
    here in the Northwest Digital signals could be variable until analogue was switched off and Digital put up to full power
    were have both Sky and ground station digital , in a bad rain storm the sky signal disappears but ground based digital is fine. admittedly we are no more than 20 miles from the Nether Kellet relay transmitter 


    I tried rescanning channels in my area. My Freeview box doesn't do an auto-update (if it does do one overnight then it's turned off).

    But the manual rescan brought it back to life as there have been a few channel changes made recently on Freeview.

    <blackcat>

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  • Message 25

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    Posted by captainMouse (U14652804) on Friday, 2nd August 2013

    My reception is rubbish again today

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  • Message 26

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    Posted by Cyril-Furr (U10382673) on Saturday, 3rd August 2013

    What it boils down to, is in the days of simple analogue TV, when ducting occured, a few horizontal lines were seen on the picture - occasionally it broke up, but the lines were the clue - with digital, the picture completly vanishes with no clues, whether it is your or their equipment at fault - or anything else wrong.

    It might assist viewers, when ducting is likely, if the more professional broadcasters rather than plug other rubbish progs on the hour, every hour, put up an audio & video captions to the effect of: Due to weather & technical reasons, reception of our new, less robust pathetic,. system of broadcasting, your TV signal may vanish, screech or freeze - do not adjust your sets, just enjoy the superior Dutch, German or French TV that may replace our usual dross;)

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  • Message 27

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    Posted by captainMouse (U14652804) on Saturday, 3rd August 2013

    I don't get foreign programmes, I get nothing, and then wonder if something is broken.

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  • Message 28

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    Posted by Cyril-Furr (U10382673) on Saturday, 3rd August 2013

    I don't get foreign programmes, I get nothing, and then wonder if something is broken.  Exactly illustrates the problem, the professional thing to do, would be to announce now & then say on the hour, that due to the weather conditions, loss of signal is very likely.

    But being Professional, does not seem to be the norm, these days.

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  • Message 29

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    Posted by technologist (U1259929) on Saturday, 3rd August 2013

    Captain MOuse - have you got someone to look at your aerial?
    see http://www.cai.org.uk/

    A different one - or even just the current one repointed slightly may help.
    Most aerials have a polar diagram which means that there are nulls in reception just off the main beam..... so a small tweak puts the interference in the nulls so that your TV does not see that signal


    If you do get a new one - check that you CAI installer is fitting one that rejects 4G so that it is fit for more than a few years service and of course replaces the down lead!

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  • Message 30

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    Posted by captainMouse (U14652804) on Saturday, 3rd August 2013

    I have had a new one and a booster fitted but there are just days when some channels are AWOL, the fact that this often co-incides with interference on the radio leads me to the weather theory, unless it's snowing the it's out with the broom

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  • Message 31

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    Posted by Cyril-Furr (U10382673) on Saturday, 3rd August 2013

    I have had a new one and a booster fitted but there are just days when some channels are AWOL, the fact that this often co-incides with interference on the radio leads me to the weather theory, unless it's snowing the it's out with the broom  It does sound like you may be in a difficult area, any trees local to you in the transmitter direction? or big buildings or obstructions?
    This may be one problem in addition to the weather conditions - was the co-ax & plugs replaced at the same time? Co-ax deteriorates with time.

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  • Message 32

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    Posted by captainMouse (U14652804) on Sunday, 4th August 2013

    It is indeed a dodgy area we get rubbish broadband too. But at least with analogue the channels were there even if the picture was snowy.

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  • Message 33

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    Posted by dod19 (U14705887) on Sunday, 4th August 2013

    My area has always had reception problems (get our signal from across the water in Wales) but never as bad as over the past 7-8 weeks. We begin to watch a programme and wonder whether we will be able to see the end!

    I agree with the suggestion that this problem should be acknowledged by broadcasters and discussed - say a few minutes during the rolling BBC News. To understand the reason for a failure makes life so much easier.

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  • Message 34

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    Posted by Martyn the retired (U1168764) on Sunday, 4th August 2013

    Background - I used to work in BBC Engineering Information, then BBC Reception Advice so I've got a lot of experience of this.

    Truthfully, a discussion would not help as most journalists have a poor understanding of the weather related interference and would tend to muddy the waters (Not all by any means though I've met some who are good).

    However the issue has been included in many weather forecasts over the years and the weather forecasters though are excellent at covering this subject as they both understand the causes, and have access to the charts that go a long way to explain. They are also excellent at explaining scientific issues in ordinary language as that is all part of the job description for a TV weather forecaster.

    Harping back on another matter, digital is better than analogue, but when it fails, does so utterly. The is the so called 'digital cliff edge'. Terrestrial TV whether analogue or digital will always be prone to interference from other broadcasters and the so called 95% rule is used in planning. In other words, interference is tolerated, as long as it does not exceed 5% of the time.

    You could go for a 100% figure, but instead of, I think, 99.4% of the population being served, you'd have a figure nearer 80% served and the rest - would all be unserved! Additionally, the 80% who were served would have few channels as well.

    So a bit of interference has always been allowed.

    From dod19s post, he/she either lives in North Somerset or North Devon and this area has always been a particular problem. A great deal of time and effort has been expended and I was one of many who researched the issues at Countisbury and could bore for England on the issues of tidal fading. Won't help though, but be assured, the issue is taken seriously.

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  • Message 35

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    Posted by dod19 (U14705887) on Sunday, 4th August 2013

    Thanks for the info Martyn but I still don't know why we couldn't be informed from time to time (on the news) that the hot weather was affecting tv reception. It was only by searching the internet that I was made aware of this problem.

    In this area we know about the effect of hills, trees, high tides and recently the info that a G4 mast was being erected - it would have been good to know there was a further reason for even poorer reception than usual.

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  • Message 36

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    Posted by technologist (U1259929) on Sunday, 4th August 2013

    Interference is less than it used to be due to digital cliff (and improvements in receivers over the model used to plan coverage) - but it does mean that its effects are more localised.
    Like Martyn - I have spent time trying to enable those in North Devon to Receive English programmes rather than rely on receiving Wenvoe from across the Bristol Channel with its large tidal range.

    These days most people do use the internet to solve their problems
    - and so the intro on www.bbc.co.uk/recept...
    seems to sum up what could be causing the problems
    - and it seem to be to be in about the order of most likely first

    Equipment or installation faults
    Trees or buildings blocking reception
    Signals being reflected from buildings, structures or hills
    Weather-related problems
    Transmitter work or faults (And there are two tools to rule these out)

    I know that it is infuriating when your favourite Programme comes and geos and then is not there at all...........

    Can I just point out NOT to Auto retune ,,, as the TV /STB cannot find the signal -
    the best advice is to wait until the weather/ Tide has changed ...
    but as a backstop try Manual retuning.... details from the BBC Page or www.digitaluk.co.uk/...

    Just an odd thought - just check by putting you Post code into
    this tool www.digitaluk.co.uk/...
    and Click on Detailed view - there may be an alternative transmitter.

    But I hope the weather moves on and that you can get back to good TV viewing.

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  • Message 37

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    Posted by dod19 (U14705887) on Sunday, 4th August 2013

    Many thanks technologist. We have done the postcode checker and appear to get our signal from Carmel in Wales.

    Will take your advice about manual retuning and investigate present aerial but to be honest we are now pretty well resigned to poor reception. The problem was that during the past weeks it has deteriorated even further but will also investigate bbc.co.uk/recept.

    There's always an amusing side, we keep track of tide heights and enjoy Welsh news although find the Welsh language rather hard to grasp!

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  • Message 38

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    Posted by Peta (U24) on Tuesday, 20th August 2013

    I hope reception has improved now that the weather has cooled down a bit?

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  • Message 39

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    Posted by captainMouse (U14652804) on Tuesday, 20th August 2013

    That was my expectation but I still get days where channel is not available and not always when extremely hot

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  • Message 40

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    Posted by Gizmomoo (U10999499) on Wednesday, 21st August 2013

    I'm getting some reception problems on a particular batch of non BBC channels but my main gripe at the moment is the number of times my TV and PVR are coming up with the message that new channels have been found and I need to retune.


    I got it three times in one week this month (despite retuning). I know this isn't BBC, I guess it's a setting on the transmitter.

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