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 18/09/2023 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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Monday, 18 May 2020
C
Chris.SE12:20 PM
Chippenham
Richard:
Last year Sony moved a number of their channels to Local multiplexes. See Channel listings | Freeview
The Local (Bristol) multiplex is beamed NNE ish from Mendip - see the maroon polar diagram further up the page. This would suggest hat you are not likely to receive it because you are further to the E, however the Freeveiw/DUK Detailed Coverage Checker does say that you may receive it but the signal is likely to be "variable"!
The multiplex is on UHF channel 30. I'd suggest you try a manual retune on UHF C30 periodically and you might just get it, but it's not likely to be reliable all the time unless you've got a good Group T/Wideband aerial. If you've still got an old Group C/D aerial then you are lucky to be getting the PSB multiplexes!
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Chris.SE's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage
C
Chris.SE12:25 PM
Richard:
BTW I'm not in Chippenham :) That's appeared because I was doing a signal check on your area and forgot to remove it before posting!
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Tuesday, 9 June 2020
Transmitter engineering
7:28 PM
7:28 PM
MENDIP transmitter - DAB: Slightly reduced power due to a fault from 25 Aug 14:56 until 25 Aug 15:03. . [BBC]
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Friday, 12 June 2020
A
Anthony8:48 PM
Where can I find the frequencies for my transmitter so that I can do a manual retune? Thanks
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C
Chris.SE11:44 PM
Anthony:
Mendip uses the following channels C32, C34, C35, C36, C48, C33, C36, C55, C56, C30
That's is the order PSBs1-3, COMs 4-8, Local mux. You may not receive the Local mux at your location.
Please note that at short notice COM8 is closing on June 22nd some channels are moving to COM7 and other multiplexes, some channels are closing.
See 22 Jun 2020 - Important channel broadcast changes | Freeview
For the channels on each mux see Channel listings | Freeview although there was some minor changes on 2nd June and the list hasn't been updated!
If you want the Frequency of each UHF channel, hover over each of the channel numbers above in this post.
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C
Chris.SE11:46 PM
Anthony:
Sorry Typo in the previous post, I've got C36 twice, the first in the wrong place, should be after C33.
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Sunday, 21 June 2020
N
Neil11:07 AM
I've just installed a new Sony Bravia tv and have intermittent HD channels on C35 and C48 groups, C35 was fine last night, weak this morning and now my TV has removed the channels again. Is this being affected by the work being done? This is my first Freeview HD television after replacing a 13 year old so frustrating it's not working as expected straight out of the box.
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C
Chris.SE8:01 PM
Neil:
There's no reported transmitter issues or maintenance at present, but there has been some variable "Tropospheric Ducting"around recently and it's likely to be so over the next few days (see https://www.bbc.co.uk/rec…iew) which may have been the cause of the issues, it doesn't necessarily affect all frequencies the same at the same time.
You say "my TV has removed the channels again". Is this because it found no signal and automatically did a retune, or did you instigate a retune? If it was automatically, I suggest you turn off this functionality as you may find channels disappear unexpectedly if there is any signal issues.
Retuning when there is no/very weak signal will usually just clear the correct tuning, you then have to repeat retune when signals are normal.
C48 is the SDN multiplex which is SD, C35 is the BBCB HD mux the other two are COMs 7&8 C55&C56.
You can keep an eye on when a manual retune may be required from this page Service updates | Freeview
As it happens, there is a retune event tomorrow see 22 Jun 2020 - Important channel broadcast changes | Freeview programme channels are moving off COM8, HD ones that aren't closing to COM7 and some SD ones may go to COMs 5 and/or 6, no detail confirmed. Arqiva have made a commercial decision to close COM8 which will go off-air on the 30th June.
Have you previously had any signal problems with C48 SDN/COM4? It maybe that your "normal" reception may be variable. We'd need a full postcode to see what the Freeview Detailed Coverage Checker predicts for your location.
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Monday, 22 June 2020
N
Neil8:21 AM
Same issue again today. Strength and quality were 99&100 last night and watched HD channels 101 to 105. This morning no 101/2 and signal 75/50 although nothing here has changed/moved.
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N
Neil8:30 AM
Trowbridge
Chris.SE: thanks, sorry didn't see your update before posting a further update this morning. I'll need to check to turn off the auto updates. The postcode is BA14 6QR. Thanks
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Neil's: mapN's Freeview map terrainN's terrain plot wavesN's frequency data N's Freeview Detailed Coverage
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