Full Freeview on the Mendip (Somerset, England) transmitter
 | Google Streetview |  | Google map |  | Bing map |  | Google Earth |  | 51.237,-2.626 or 51°14'12"N 2°37'33"W |  | BA5 3LB |
The symbol shows the location of the Mendip (Somerset, England) transmitter which serves 720,000 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.
Are there any planned engineering works or unexpected transmitter faults on the Mendip (Somerset, England) mast?
Mendip transmitter - Mendip transmitter: Possible effect on TV reception week commencing 11/11/2024 Pixelation or flickering on some or all channels 
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Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
DTG-12 QSPK 8K 3/4 8.0Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)
Which Freeview channels does the Mendip 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.
64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
DTG-12 QSPK 8K 3/4 8.0Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)
Which BBC and ITV regional news can I watch from the Mendip transmitter?
ITV West Country News (East) 0.9m homes 3.4%
from Bristol BS4 3HG, 23km north (11°)
to ITV West region - 61 masts.
All of lunch, weekend and 50% evening news is shared with West Country (West)
Are there any self-help relays?
| Cheddar | Transposer | 15 km E Weston-super-Mare | 1674 homes |
| Luccombe | Active deflector | 6 km w Minehead | 38 homes |
How will the Mendip (Somerset, England) transmission frequencies change over time?
| 1984-97 | 1997-98 | 1998-2010 | 2010-13 | 2013-18 | 2013-17 | 27 Feb 2018 | |||
| C/D E | E | E | C/D E | C/D E T | W T | W T | |||
| C30 | _local | ||||||||
| C32 | BBCA | ||||||||
| C33 | com7 | com7 | |||||||
| C34 | D3+4 | ||||||||
| C35 | com8 | com8 | |||||||
| C36 | ArqB | ||||||||
| C37 | C5waves | C5waves | |||||||
| C48 | SDN | SDN | SDN | SDN | |||||
| C49tv_off | BBCA | BBCA | |||||||
| C51tv_off | LBS | LBS | |||||||
| C52tv_off | ArqB | ArqB | ArqB | ||||||
| C54tv_off | C4waves | C4waves | C4waves | D3+4 | D3+4 | D3+4 | |||
| C55tv_off | com7tv_off | ||||||||
| C56tv_off | ArqA | ArqA | ArqA | COM8tv_off | |||||
| C58tv_off | BBC1waves | BBC1waves | BBC1waves | BBCB | BBCB | BBCB | |||
| C61 | ITVwaves | ITVwaves | ITVwaves | BBCA | |||||
| C64 | BBC2waves | BBC2waves | BBC2waves |
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 24 Mar 10 and 7 Apr 10.
How do the old analogue and currrent digital signal levels compare?
| Analogue 1-4 | 500kW | |
| Analogue 5 | (-6dB) 126kW | |
| SDN, ARQA, ARQB, BBCA, D3+4, BBCB | (-7dB) 100kW | |
| com7 | (-8.4dB) 72.4kW | |
| com8 | (-8.6dB) 69.1kW | |
| Mux 1*, Mux 2*, Mux A*, Mux B*, Mux C*, Mux D*, LBS | (-17dB) 10kW |
Which companies have run the Channel 3 services in the Mendip transmitter area
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Saturday, 15 November 2014
P
Paul8:17 PM
Has anyone got any tips on what type of aerial would be best to use, am located in Worle, postcode bs226lj, and currently have issues with fluctuating signal quality on numerous channels, strength is stable and high, around 90-95 percent that's with using a booster which I don't think I should need one with an outdoor aerial but without the booster the fluctuating signal quality is even more of an issue so the fluctuating quality isn't directly related to using a booster. I do know about the pros and cons about using boosters so be need to really go into that, it's the types of aerial I'm interested in getting advice about.
We do have a main road outside the house, the fluctuating quality is a lot to do with traffic as the issue goes away late at night, early hours of the morning when there's obviously hardly any traffic going by. My location isn't on one of the high spots around Worle so the aerial doesn't have a direct line of sight but I don't think that's the issue with the quality fluctuating due to the situation improving late at night etc as the tall trees (not close by but are in line with the direction the aerial is pointing) are there all the time lol.
I'm sure I've seen an aerial advertised that is supposed to help with interference issues but can't recall if I'm correct on that one, the one we have on the roof now was installed a few years ago, the installer said it was good enough but it looks like the one of the old aerials that have been around 20 plus years, if you know what I mean.. The cable being used with the outdoor aerial is pf100.
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Sunday, 16 November 2014
J
jb3812:12 PM
Paul: Locations where the quality of the signal received is being adversely affected by traffic passing along a nearby roadway, can in "some" cases be down to the aerial having moved slightly whilst it was being tightened up, insomuch is sitting a few degrees to the right or left of the exact direction that the signal is coming, this type of thing making it more sensitive to such as reflections from passing traffic etc, multi-element aerials of the high gain variety (should this apply) exacerbating the problem because of their narrower signal acceptance angle.
Therefore, as the aforementioned is only one possible reason for your problem, it would be rather prudent to make one or two local enquiries to ascertain if others are also suffering from similar problems with their reception, because if they are, then your aerial alignment is likely to be OK.
That said, you are indicated as being at 15 miles away from the Mendip transmitter @ 124 degrees, the line-of-sight problem you refer to seen on the terrain indicator as being at 7 miles prior to your location, a factor related to this being that reception of signals of a non-direct line nature is only possible through what's known as diffraction (signal bending) resulting in them being more vulnerable to anything that might interfere with them, e.g: such as vegetation in the form of trees etc on the land that is causing the LOS obstruction, this unfortunately being something that no one can do anything about.
By the way, on the subject of aerials, its quite unnecessary to use anything other than a Log periodic (Log 36) aerial for DTT reception, their only problem being one of image, insomuch that people incorrectly equate large pieces of metalwork on their roofs as in some way being superior to that of the much smaller Log types, the latter in many cases giving a superior level of glitch free reception by having a wider pick up angle plus a near to flat response across the channels.
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Tuesday, 18 November 2014
S
Steve11:35 AM
Taunton
Hi All,
I cannot seem to find any mention of current Freeview interference on ITV and C4 variants for the Mendip transmission area. I live in the Taunton area and although we appear to be on the edge of the coverage area we normally have good reception. The picture/sound have been blocking for a couple of weeks now, making viewing and recording impossible. I don't think it is equipment because both the TV and digibox recorder have the same problem. Has anyone else had this problem and are there any solutions?
Thanks.
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Steve's: mapS's Freeview map terrainS's terrain plot wavesS's frequency data S's Freeview Detailed Coverage
M
MikeB1:29 PM
Steve: have you checked your signal strength - it could well be that common problem of too much signal - Freeview signals: too much of a good thing is bad for you
There seems to be a lot of it around at the moment
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Monday, 24 November 2014
S
Steve6:06 PM
MikeB: Hi Mike and thanks for your suggestion. I've not looked at signal strength before so I've taken the following readings from our Sony TV (gives % quality and strength) and TVOnics PVR (displays an analogue 'progress bar' for strength so a visual estimate). ITV/C4 channels remain unstable since your post.
18 Nov 6:15pm weather unsettled %Qual %Strength
TV BBC1 83 38
ITV 21 34
C4 23 34
PVR BBC1 60
ITV 60
C4 60
Didn't record BBC figures after this as it has been fine, and no further figures for any channel on the PVR as it remained about 60%. The rest are just for the TV.
19 Nov 10:40pm weather fine
ITV 46 38
C4 37 38
20 Nov 6:30pm weather unsettled
ITV/C4/More4 etc 0 26
24 Nov 5:15pm
ITV/C4 16 30
I'm not sure what to make of these figures. PVR signal strength seems to be almost double the TV whatever the channel. Signal quality seems more significant; compared with BBC1 (80/90%), ITV/C4 ranges from 0 - 34. NB I did rescan both units when this problem first started. I haven't found any other references to viewers having these problems and this has been the longest duration of reception problems that I can remember. Any further help or suggestions gratefully received!
Cheers,
Steve
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M
MikeB7:19 PM
Steve: It probably would be helpful to put in a postcode when you next post, so we can the signal path etc. However, its seems your right - the PVR is fine (ok, not fantastic, but if your are on the edge of reception, understandable), but not the TV. TVOnics tuners should be not much different from Humax (if I remmber the reviews), and I know Sony turners are really sensitive.
Ok - is the signal coming into the the PVR, and then being looped through the PVR and sent on to the TV? If so, it might as simple as a duff aerial lead! Try replacing the one from the PVR to the TV, and see if it makes any difference. Frankly, if you go to Poundland, you might get some Belkin ones for a quid, so buy two and see if there is any difference when you replace both.
If there is no difference, at least you can cross it off the list, for a couple of quid.
BTW - this new layout isn't really working all that well, or is it just me?
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Sunday, 30 November 2014
B
Bob F10:50 PM
Stonehouse
Our post code is GL10 3BJ - Eastington and we receive Freeview from Mendip.
Why does the map show that we can't get Freeview TV from Mendip please?
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Bob's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
Monday, 1 December 2014
J
jb3812:17 AM
Bob F: Basically because coverage maps or reception predictors cannot by their very nature be 100% accurate, nor indeed can any prediction involving terrestrial RF signals as so many variables apply, and with in your particular case indications being that you are on the doorstep of a so called dead spot for reception, the terrain indicator revealing a rather large line-of-sight blockage to the signal path between Mendip and you whereby any signal received is via diffraction (signal bending), this generally resulting in reception being vulnerable to changes in atmospheric conditions at certain times of the year, or even weather related conditions that affect the surface of the terrain, a frequent reason for random picture glitching cropping up now and again for no apparent reason.
Or to put it another way, the only prediction that can ever be 100% accurate is in cases where cable is used to supply the signal to a household.
Obstruction referred to seen by opening the link.
Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location
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Saturday, 6 December 2014
Simon
4:24 PM
4:24 PM
Is there still a possible weak signal on this transmitted? Lost all channels on my TV
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