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.
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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, 11 September 2023
Transmitter engineering
5:09 AM
5:09 AM
Mendip transmitter - Mendip transmitter: Possible effect on TV reception week commencing 11/09/2023 Pixelation or flickering on some or all channels [DUK]
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Monday, 18 September 2023
Transmitter engineering
5:09 AM
5:09 AM
Mendip transmitter - Mendip transmitter: Possible effect on TV reception week commencing 18/09/2023 Pixelation or flickering on some or all channels [DUK]
link to this comment |
Friday, 22 September 2023
Has HorrorXtra channel and realityXtra channel swapped Mux ?
Transmitter is Mendip. I am in Bristol.
All started Tuesday Night / Wednesday Morning 19th/20th September 2023. In my case EPG swapped between 'RealityXtra' and 'HorrorXtra', but this was corrected a day later.
No 'you may need to retune your equipment - press Yellow to dismiss this message' pop-up, like previously displayed for such changes.
No warnings of re-tune / re-mapping on the usual web sites, though hints of engineering works and reduced power (that were NOT evident) on some sites including this one, week beginning 18th September 2023.
I setup a recording that recorded the other unwanted channel in the pair, presumably due to the EPG swap / error.
It seems to me that the HorrorXtra channel has been relegated to the Local Mux, C30 for Mendip and realityXtra has been elevated to COM4 / SDN, C48 for Mendip. The change was half-completed, or an error on EPG introduced, the first night with full completion the second.
The local MUX C30 is 10,000W and COM4 / SDN C48 is 100,000W for Mendip - so if you cant get the Local channel, "Bristol TV", you'll likely lose HorrorXtra.
Many re-tunes, Factory Resets and swapping the Aerial input lead primary / slave looping between my TWO receivers didn't fix the issues, except I am lucky and one and only one of my receivers is sensitive enough to receive the Local Mux.
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Saturday, 23 September 2023
C
Chris.SE2:23 AM
The_Highwayman:
RealityXtra LCN68 is now on SDN/COM4, HorrorXtra LCN69 is now on the Local multiplex.
This was a change made by the broadcaster and even Freeview didn't mention it amongst the other minor channel changes this month. (They never give details of the multiplex in their "updates" in any event, they just talk about "increased coverage" or "decreased coverage" !!
Apparently, although the channels swapped multiplexes, the broadcaster forgot to swap the EPG immediately so had the listings for the sister channel.
They appear to be correct now.
You must be in a poor reception location to not get the Local mux (you haven't given a full postcode so I can't advise on that). Because of the transmission mode used by the Local multiplex it will propagate almost as well as the main signals using less power.
It looks as though the Planned Engineering is likely to continue next week.
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C
Chris.SE2:31 AM
The_Highwayman:
As far as receiving the Local mux is concerned, it's not a case of sensitivity of the receiver, I should have added that the Local mux is beamed roughly north-north-easterly from Mendip, not a very wide beam, see the Red plot on the polar diagram towards the top of the page. So if you off to the East or the West you may not get a signal.
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