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, 22 May 2012
J
jb389:33 PM
Lordgeous: Without knowing your exact location you have to look at the problem another way, insomuch that part of Bath must suffer from a reception problem by being screened from the main transmitter as otherwise a local relay would not have been required.
However, if a person is not in a screened position then its possible that they could be receiving an excessively high level of signal from the Mendip 100Kw transmitter located at only 15 miles away, the misleading aspect for anyone experiencing this type of problem being that an excessively high signal can cause partial instability in a tuner whereby the signal strength / quality indications given will be totally inaccurate resulting in low readings, or even in some cases 100% strength accompanied with zero quality.
If you have any form of booster fitted then for a test bypass it, or if you have access to a set top aerial then plug that in and give your TV or box another retune, giving an update on results.
The reason for me suggesting this is that 100% strength is not an ideal level for equipment to be running at as the next stage up from 100% is instability, so levels of around 90% or so maximum is much safer as it allows for some channels having the power edge on others.
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L
Lordgeous9:52 PM
Appreciate what you say. I'm highish up on the northside of Bath (friends in similar position on the south) - but no line of site view of MendipI would use the local relay but it has capacity for only a few channels. All local ariels seem to be aimed at Mendip in my location, as you get higher up out of Bath then the seem mainly to point to Wenvoe (i think). Freeview has worked fine since the digital changeover so what has changed? I will investigate further but I do have one TV on an indoor ariel which gets a very weak signal, cant pickup Mendip with it at all, only the local relay.
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Thursday, 24 May 2012
B
Bizman9:24 PM
@Lordgeous, if as you say "this has to be an intermittent transmitter problem", then how come I get near perfect uninterrupted reception from the Mendip transmitter?
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L
Lordgeous10:35 PM
Bath
I guess there must be something in what JB38 says and I've ordered a variable attenuator to experiment with. What I dont understand is why these problems only started a few weeks ago - I had perfect reception on all channels up til then so maybe theyve upped the signal strength on some stations from Mendip.
Just to clarify what I said before the 'good' signal as displayed on my PVRs and TVs is not EXACTLY 100%, just high. I have two 'high-end' HD PVRs and current Sony, Panasonic & Toshiba TVs, each fed seperately from a 7 way distribution amp (without gain as far as I'm aware), a good rooftop ariel, and as I said this has all worked fine for some time.
Anyway thankyou to this most helpful and informative site - I shall report back.
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Lordgeous's: mapL's Freeview map terrainL's terrain plot wavesL's frequency data L's Freeview Detailed Coverage
Friday, 25 May 2012
B
Ben Ward1:30 PM
Melksham
I spoke too soon of course. Signal strength and quality is very variable this week, from nothing to 100%. I will keep plugging away i=at this, as I like a challenge! :-)
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Ben's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
Sunday, 27 May 2012
L
Lordgeous6:47 PM
Bath
Contrary, now all channels are working fine for me!
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Lordgeous's: mapL's Freeview map terrainL's terrain plot wavesL's frequency data L's Freeview Detailed Coverage
Wednesday, 30 May 2012
B
Ben Ward3:44 PM
Melksham
Lordgeous, I hope your situation remains the same and you continue to get all your channels. We have *some* of our channels now, but not all especially BBC and Channel 4 ones.
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Ben's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
Thursday, 31 May 2012
M
Mike8:58 AM
Poole
My Sony pvr set up for West transmitter has operated perfectly until Rowridge& Poole switchover overnight retunes itself to
channels 27&57 drops all PSB from Mendip other tvs in use are not affected.Manual retune restores the West channels for a day or two any advice would be appreciated
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Mike's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
Mike: A filter could be used to avoid Rowridge, however Poole's channels are interleaved with those of Mendip.
Before you go down the filter route, try attenuating the signals. Attenuators are a few pounds online.
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M
Mike9:31 AM
Poole
Will try attenuator and see if that helps signal strength from West is very high 100% stregth & quality.Perhaps changing to Rowridge vertical might be the answer but rather expensive.
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Mike's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
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