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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Tuesday, 6 May 2014
Wednesday, 7 May 2014
M
Mike3:40 PM
Poole
I have 2 TVs both fed from same aerial system via distribution amp
Tv No 1 uses You View Box receives Com 7 signal strength 49% quality 100%
normal strength other Coms 79% Qual 100%
Set 2 Samsung Com 7 only 26% strength Bit rate error level 1500 no use for reception.
Normal on other Coms signal 90% Bit rate error level 0
I'm in BH15 3RJ using Mendip Any ideas if the Samsung problem can be resolved don't want to switch to Rowridge its not very good here.
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Mike's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
Tuesday, 13 May 2014
Wednesday, 14 May 2014
MikeP
8:11 PM
8:11 PM
Mike
Just a thought that the cable feeding the Samsung may have a higher attenuation so less signal is reaching the set, perhaps. Might be worth trying replacing that cable and making sure that you are using outputs from your distribution amplier that give the same signal levels (some have both high and low outputs).
Please let us know if that helps.
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J
jb3811:35 PM
Mike: In addition to that said by MikeP, if everything looks to be OK at the booster side of the equation purely an extra test try swapping the two "output" connections over on same and check if the signal situation at the receiver end has changed or not.
You should also check that both the You-View box and the Samsung TV are tuned to the same COM7 mux, Mendip (45miles @ 320 degrees) being on Mux C33 / 570.0Mhz and with Rowridge (27 miles @ 98 degrees) Mux C31 / 554.0 Mhz, the only reason for mentioning this being that COM7 is indicated (on the DUK site) as only being receivable from Rowridge, although I fully appreciate that this "might" be an error.
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Saturday, 17 May 2014
M
Mike2:52 PM
Thanks to MikeP &jb38b for advice will try the suggestions you have made and let you know the outcome. I have checked the com it is definitely channel 33 570MHz so Mendip signal reaches this far. Will also ask neighbours as most people here use the Mendip transmitter {less trouble with inversion in summer time } if they are getting reception from Com 7.
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J
jb388:40 PM
Mike: Prior to the outcome of your tests, the situation has to be looked at from the angle that if indeed your You-View box with its 49% signal strength (which does leave a bit to be desired!) results in a stable signal with a quality indication of 100%, then irrespective of my previous advice, the quickest way of determining the source of the problem is by temporarily testing your You-View box on the outlet used by the Samsung and checking the strength / quality of the signal, because if the indications on the You-View box are similar to that previously obtained when used on its own outlet then this points to the problem being with the Samsung.
Should this be found to apply, then it does not necessarily indicate that the Samsung's tuner is faulty but possibly just that the You-View boxes tuner is more sensitive to that of the Samsung's, something that's not exactly unusual as tuners can vary even within models in the same brand let alone in other brands, and so even although its always a good idea to find out if others in your immediate locality are also experiencing similar problems to yourself, then no matter what the reply might be the aspect of variations in tuner sensitivity has always to be kept in mind.
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Tuesday, 27 May 2014
M
Mike3:56 PM
Poole
Jb38 Have tried all suggestions except replacing cable some improvement with an additional booster helped but is not ideal improves signal level but quality still low.
Picture locks ok.
Do you think as Rowridge is only 27 miles A group aerial horizontal would work?Connected to distribution amp with a di-plexer.
Could use this for all PSB mux as well as for additional HD services leaving wide band aerial on Mendip for the other programmes.Providing a reasonable signal from Rowridge is available.Location BH15 3RJ
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Mike's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
Wednesday, 28 May 2014
J
jb3812:22 AM
Mike: On having studied the terrain between the Mendip and Rowridge transmitters relative to that of your location, I have to honestly say that I feel nothing can really be guaranteed as far as continuity of reception throughout the year is concerned due to the signal paths from both stations suffering from line-of-sight blockages, in the case of Rowridge this being mainly at around 2.5 miles prior to your location, albeit that the signal could be affected from around 6 miles out, whereas in the case of Mendip the problem mainly starting from 11 miles out but could be affected in various ways from as far out as 16 miles.
As far as your suggestion is concerned, yes! as that mentioned would in theory anyway be about your best action to take, although on the subject of boosters, I would use one of the variable gain types with a rating of around 15db (min) or so, as anything under this would be a waste of time.
I would like to add though, that reception under these conditions is always liable to suffer from signal quality issues corresponding to changing weather conditions altering the reflective effect of the terrain.
By the way, you can see for yourself the problems referred to by opening the undermentioned links.
Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location
Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location
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Sunday, 1 June 2014
M
Me10:54 AM
We seem to have lost COM4,5 & 6 - signal strength is about 90 but quality is 0, any ideas?
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