Full Freeview on the Bluebell Hill (Medway, England) transmitter
|Google Streetview||Google map||Bing map||Google Earth||51.324,0.520 or 51°19'25"N 0°31'13"E||ME5 9RD|
The symbol shows the location of the Bluebell Hill (Medway, England) transmitter which serves 200,000 homes. The bright green areas shown where the signal from this transmitter is strong, dark green areas are poorer signals. Those parts shown in yellow may have interference on the same frequency from other masts.
This transmitter has no current reported problemsThe BBC and Digital UK report there are no faults or engineering work on the Bluebell Hill (Medway, England) transmitter.
Which Freeview channels does the Bluebell Hill transmitter broadcast?If you have any kind of Freeview fault, follow this Freeview reset procedure first.
Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
1 BBC One (SD) South East, 2 BBC Two England, 9 BBC Four, 23 BBC Three, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, 250 BBC Red Button, plus 15 others 700 BBC Radio 1, 701 BBC Radio 1Xtra, 702 BBC Radio 2, 703 BBC Radio 3, 704 BBC Radio 4 (FM), 705 BBC Radio 5 Live, 706 BBC Radio 5 Live Sports Extra, 707 BBC Radio 6 Music, 708 BBC Radio 4 Extra, 709 BBC Asian Network, 710 BBC World Service, 719 BBC Kent (BBC local radio), 720 BBC Sussex (BBC local radio), 722 BBC Surrey (BBC local radio), 734 BBC Essex (BBC local radio),
3 ITV (SD) (Meridian (East micro region)), 4 Channel 4 (SD) South ads, 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 South ads, 18 More4, 26 ITV4, 30 E4 +1, 35 ITV +1 (Meridian south coast),
56 5SELECT, 101 BBC One HD (England no regional news), 102 BBC Two HD (England), 103 ITV HD (ITV Meridian Southampton), 104 Channel 4 HD South ads, 105 Channel 5 HD, 106 BBC Four HD, 109 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others 66 TBN UK,
12 Quest, 20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 41 Legend, 42 GREAT! movies action, 46 Channel 5 +1, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 CBS Reality, 74 Dave ja vu, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 203 CITV, 208 POP MAX, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, plus 15 others Create and Craft, Racing TV, Kiss Chat & Date, Proud Dating, ADULT Xpanded2, 16 QVC, 22 TJC, 263 SonLife, 264 VisionTV, 265 On Demand 365, 269 Arise News, 670 ADULT Section (start), 724 Capital, 727 Absolute Radio, 728 Heart,
11 Sky Arts, 17 Really, 19 Dave, 31 E4 Extra, 36 pick, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 57 Smithsonian Channel, 60 Drama +1, 70 Quest +1, 75 Yesterday +1, 83 Together TV, 233 Sky News, plus 8 others 45 Gems TV, 85 CRAFT EXTRA , 673 ADULT smileTV3, 723 talkSPORT, 730 RNIB Connect, 731 Classic FM, 732 LBC, 733 Trans World Radio,
FreeSports, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 71 Quest Red +1, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 88 Classic Hits, 235 Aljazeera English, plus 19 others ADULT smileTV2, ADULT Studio 66, 37 QVC Beauty, 38 QVC Style, 51 Ideal World, 72 Jewellery Maker, 206 Pop, 674 ADULT Babestn, 678 Xpanded TV, 699 ADULT Section, 711 Hits Radio, 712 KISS FRESH, 713 KISS, 714 KISSTORY, 715 Magic, 716 Greatest Hits Radio, 717 Kerrang!, 718 Smooth Radio, 725 Premier Radio,
from 8th April 2014:
DTG-6 256QAM 32KE 2/3 40.2Mb/s DVB-T2 MPEG4
DTG-8 64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)
Which BBC and ITV regional news can I watch from the Bluebell Hill transmitter?
BBC South East Today 0.8m homes 3.2%
from Tunbridge Wells TN1 1QQ, 28km southwest (219°)
to BBC South East region - 45 masts.
How will the Bluebell Hill (Medway, England) transmission frequencies change over time?
|1984-97||1997-98||1998-2012||2012-13||19 Jul 2018|
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tv_off Being removed from Freeview (for 5G use) after November 2020 / June 2022 - more
Table shows multiplexes names see this article;
green background for transmission frequencies
Notes: + and - denote 166kHz offset; aerial group are shown as A B C/D E K W T
waves denotes analogue; digital switchover was 13 Jun 12 and 27 Jun 12.
How do the old analogue and currrent digital signal levels compare?
|SDN, ARQA, ARQB, BBCA, D3+4, BBCB||(-1.8dB) 20kW|
|Mux 1*, Mux B*, Mux C*, Mux D*||(-10dB) 3kW|
|Mux 2*, Mux A*||(-11.8dB) 2kW|
Which companies have run the Channel 3 services in the Bluebell Hill transmitter area
I suspect that you are misinterpreting what has been said by myself, MikeB and many others. Having too little signal is always likely to present intermittent reception problems. Having too much signal for the tuner to cope with will also present as intermittent reception problems, often reported bt the TV as a message saying 'No Signal' which is actually incorrect. What happens is that the tuner becomes overloaded with signal and cannot process the data into a usable data stream that can be recognised by the subsequent signal processing stage of the receiver. When that happen, you get the false, 'No Signal' message displayed as it thinks there is no signal because it cannot process it properly. As the signal strength will inevitably vary throughout the day and from day to day with variations in the atmospheric propogation conditions the actual signal strength arriving at the aerial will vary considerably. So the aim is to ensure that the actual received signals are of sufficient strength to reliably give a good reception and decoding at all times, hence the minimum quoted of 60%, and yet not be too strong as to cause tuner overload despite the variation in strength, hence the top limit quoted as being 85%. That allows for the varying strength of the signal to give an apparently constant reception. The quality measure is not a good quide when all is working well, it only comes into the picture when the signal is too low or too high for the decoding to be having trouble in sorting out the data, then the quality measure can assist. Note that the decoding systems include factors such as error correction to make it quite robust in normal circumstances, but even that cannot cope with very high levels of data errors.
So the recommended signal strengths are 60% as a minimum and 85% as a maximum are to allow for variations in the received signal strength and the variations in sensitivity between not only manufacturers but also individual examples fitted by the same manufacturer to different models. The same applies to PVRs as well.
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As a qualified engineer, please don't talk to me as though I'm a complete idiot and don't understand how digital (or other) signals work, varying signal strength, front end overload, error correction and etc.
Quote "The quality measure is not a good quide when all is working well, it only comes into the picture when the signal is too low or too high for the decoding to be having trouble in sorting out the data, then the quality measure can assist."
Precisely, so if a tuner is showing strength 95%, and zero bit error rate or 100% quality, and there is no picture or sound issues under normal conditions (no strong dx lift), then there should be no problems.
IMHO, you should not make statements such as - quote "They need to be between 60% and 85%, any more will cause significant problems that can be cured by fitting an attenutator ............."
If you are commenting in this way it should be qualified ie. "Ideally IMO, aim for signal between 60% and 85%, significantly more might cause noticeable problems that are often cured by fitting an attenuator ..........."
It seems we shall have to agree to disagree.
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I am very well qualified as I spent 50 years working in the TV inductry in technical roles, as a Senior Technical Trainer for a large TV rental company before moving to similar roles in other related companies. I also have a Masters Degree in Electronics and Physics. So I am very well qualified to make the comments I do based on both technical knowledge and understanding as well as relevant experience.
Further, you miss the point that we do not know what equipment is being used by the person reporting a problem. So we need a general approach unless a specific question is asked. Further, due to the varying attenuation by the atmosphere we do not know how much their signal varies, as it does on every receiver, so we need to give guidance in such a way as to avoiud the overload conditions whilst still meeting the minimum requirement levels needed by tuners.
I know of instances where a 90% signal strength gives intermittent problems. My younger brother, also an electronics engineer with higher degrees, was suffering from just such a problem and when we checked the strength it was in the 90% range and varying. So a 3dB attenuator was fitted, reducing the signal levels to 84% on most multiplexes and that cured the intermittent sound problem. A family friend was having problems with apparent loss of some channels. All the usual checks were made of the aerial system and the only feature visible was the strength being 96% on the worst affected mux. A 6dB attenuator solved that with a signal strength now showing as 86%.
You asked why I and others so often quote the 60%-85% range, they are examples of why. You assumed I didn't know what I was talking about so I have now corrected your understanding.
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Quote - "You assumed I didn't know what I was talking about so I have now corrected your understanding. "
I did nothing of the sort, NOR did I state that, NOR did I state that there were not cases where signals greater than 85% gave problems.
You made a statement in another post elsewhere that "any more WILL cause significant problems".
That is patently NOT true, whilst it MIGHT cause a problem in some cases, it won't in all cases.
It's your definitive wording that I'm quibbling with.
I'm certain that there are plenty of others who have posted here (and no doubt elsewhere) that have signal strengths greater than 85% with no issue.
Your post on Tuesday, 16 October 2018 11:24 AM was posted in a tone that assumed I did not understand anything to do with the issues involved, as does your last post. That is arrogant. Nor am I missing any points. I am also a degree qualified engineer (as I indicated in my previous post) with a similar number of years experience with TV and in other electrical & electronic fields.
As stated, I just don't agree with your definitive wording, IMHO you should use that word MIGHT not WILL, "simples" as the saying goes. Now doubt you will carry on using wording of your choice.
Having now thrashed this to death, Endof.
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I don't believe I've been rude at all, just because I didn't agree with your choice of words.
I have quoted from your posts.
Try reading your post on Monday, 15 October 2018 10:47 AM on the Sudbury transmitter page -
Quote "So start by checking the indicated signal strengths on all the multiplexes. They need to be between 60% and 85%, any more will cause significant problems that can be cured by fitting an attenutator into the aerial cable behind the set ........."
Other "quotes" are from your posts on this transmitter board.
I notice some of your more recent posts have been worded in a way I totally agree with.
As I've said, this has been thrashed to death, so we'll have to agree to disagree.
However one query - what equipment was your younger brother using that had the intermittent sound problem?
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Chris.SE & MikeP:
Why does my signal drop out when vehicles pass by my house? I live on a busy road and it is worse at rush hour or when a bus goes by. I live within 2km of the transmitter and my signal strength is 70 to 90%. Signal quality 90 to 100% but drops off when traffic passes. Often goes black and displays "No Signal" message. Didn't happen before changes on 19th July 2018. What has changed to cause this? Thanks
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