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 04/11/2024 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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Wednesday, 24 August 2011
K
Kevin10:11 PM
Devizes
Aerial is on roof, however we are missing channels on both the TV & the HDD recorder, but different channels on each! On retuning both the TV & the HDD recorder we "only" get about 80 to 85 channels on each. We seem to be loosing more channels over the last few weeks.
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Kevin's: mapK's Freeview map terrainK's terrain plot wavesK's frequency data K's Freeview Detailed Coverage
Thursday, 25 August 2011
Thursday, 1 September 2011
G
Gary10:14 AM
Swindon
I live in SN25 1RE. The recept off Mux A, Com6 ArqB is poor / non existent. showing 46% or lower on the TV Rx levels. PSB1-3 is 70%, others average 55%. Is the power due to be turned up on A & Com6? if not what are the options? I've had my signal checked and Mendip is the best reception for my area.
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Gary's: mapG's Freeview map terrainG's terrain plot wavesG's frequency data G's Freeview Detailed Coverage
M
Mike Dimmick2:14 PM
Gary: Yes, power levels on the COM multiplexes are low at Mendip due to channel clashes with Oxford and Huntshaw Cross. There is a retune and power up on the SDN (Mux A/COM4) and ArqB (Mux D/COM6) multiplexes on the 28th; at the same time, ArqA (Mux C/COM5) will move to ArqB's present location and power level.
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Tuesday, 6 September 2011
J
JPWarner3:51 PM
re. No TV signals from Mendip since July 8th, despite dozens of retunes: Update to my previous post: I've now spoken to the BBC's engineers and interference teams. Both insist that Mendip is 100% (and 100kW) for BBC signals so don't know why I'm not receiving any TV signals in Marlborough (SN8) after 5 years. This seems to contradict Briantist's comments re lower power from this transmitter. Don't want to lash out on Freesat until I'm sure about this. Any advice welcome!
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Wednesday, 7 September 2011
E
Elaine5:05 PM
JPWarner: There's lower power (shown on the signal strength bars at the top of this page) for the commercial multiplexes - A, C and COM6. However, the ones that the main BBC channels are on (i.e. the public service multiplexes) are broadcasting at 100%.
Can't help you with why the broadcast doesn't seem to be reaching you, though :(
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J
Jim F5:29 PM
JPWarner: You're nearly 64km from Mendip, but receiving the Arq A MUX (which is one of the ones on reduced power). This would suggest that you should be able to receive all the others. Without knowing what your aerial installer has done, I'm wondering if you have a masthead amplifier fitted. This would require 12V power fed to it via the coax cable from a small power supply inside the house. Could you advise if you have a masthead amp, and whether there is any kind of joint in the coax cable on the mast (typically wrapped in black tape)? If rain gets into a joint like that, it can take voltage away from the masthead amplifier by forming a leakage path, giving the effect you describe. Unplugging the 12V power supply for a few seconds and then reconnecting it typically results in a good signal for a few seconds, before the water starts to conduct again (reducing the voltage to the masthead amplifier). You can observe this on the TV menu showing signal strength / quality.
I'm a little concerned when your installer claims that everything has been checked - you should expect to receive a reasonable signal at your location, and your installer's meter should tell him what's happening (low power / low quality & signal levels either side of a masthead amp.).
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Saturday, 10 September 2011
J
James C1:29 PM
Highbridge
I get my service from the main Mendip transmitter. I see something is changing on September 28th, but I am not sure what.
Will I need to retune?
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James's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
K
KMJ,Derby5:49 PM
James C: On 28th September 2011 MuxA changes frequency to C48 ( still 2k mode). Mux ArqA changes mode to 8k and frequency offset removed (C56). Mux ArqB changes frequency to C52. A retune is therefore required on this date.
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P
Pete Green8:11 PM
Why is Digital UK tradeview showing a retune on 28 Mar. then no channels are changing.
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