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 04/12/2023 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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Wednesday, 3 April 2013
Michael Perry
8:12 PM
8:12 PM
To Mazbar
That Ch48 is received very strongly means that Ch49 will be as well as long as it is a true C/D group aerial - it is of course as Mendip analogue transmissions were in the C/D band.By definition, Group C/D aerials cover 47 to 69 but if signal strength and quality are high then decoding should be fine - but it isn't on Ch49 and it IS on Ch 48! So aerial is not the problem. BTW, I'm a retired TV engineer.
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M
Mazbar8:17 PM
Michael Perry: sorry I have only been fitting aerials for over 20 years and as I stated if there is a problem with any part of the aerial the outer ends of the aerial acceptance will be affected the most.
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Michael Perry
8:21 PM
8:21 PM
To John Crabb
An HDMI cable is carrying digital signals with fast rising edges, so can radiate and that may be picked up by a poor UHF coaxial cable. Always use good quality cables but don't waste money on the 'gold' plated ones - expensive does not mean good quality.
Any electronics book that covers RF signals up to 1000 MHz ought to have something about the relationship between wavelength, frequency and standing waves on cables of a length close to a multiple of the signal wavelength. A rough guide, 300MHz=1m and 100MHz=3m. So for a 600MHz signal avoid any multiple of 0.5m or thereabouts. Hope that helps?
A lot of waffle is spouted about aerials for 'digital' signals. The signal transmitted is an RF carrier so any aerial designed for reception of the frequency range can be considered. Aerial gain and reception angles are also important. A good C/D will suffice for Mendip now but a WB will be needed in a few years- the plan is to move Mendip into the Group A band around 2019!
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Michael Perry
8:26 PM
8:26 PM
To Mazbar
Sorry I have been teaching engineering staff of a former major TV rental company covering not only the TV sets but aerial systems and satellite systems as well - since 1969! Before that I worked for Philips Electrical. So 59 years experience.
Don't assume that older aerials are deteriorating, it is the enclosed contacts that cause most problems if they are not properly enclosed and sealed. A good quality aerial, well fitted and properly sealed will last for many years. If Ch48 is excellent, it is, then 49 will be as well - it's only 8MHz higher up the band further into the central reception pattern of a C/D aerial.
A C/D group aerial will need replacing before 2019 anyway as they are changing bands for Mendip.
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M
Mazbar8:40 PM
Michael Perry: if every thing was ok then your bbc would be working have you had your aerial checked by a professional, could you be experiencing interference from another out of area transmitter some signals can carry very very long distances I received rte in sklmersdale, if it is another transmitter try a log aerial this has a narrow acceptance angle. Judging on how long you have been working you are over 75 so don't try going on your roof unless you are ok.
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K
KMJ,Derby8:44 PM
Michael Perry: If the suggested plan is implemented all UHF TV transmitters will be either group A or group K, Mendip being the latter if C40/43/46 is adopted for the PSB muxes. Wideband aerials, especially those in use on transmitters that use vertical polarisation might also need replacing as one of the measures to reduce reception of unwanted 4G (or 5G) signals.
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Michael Perry
8:47 PM
8:47 PM
To Mazbar
Signal reception of wanted channels is excelent strength and quality and I have checked the aerial system all the way to the aerial sockets myself (I do know how to do that). Huntshaw Cross has always been visible in the background but at a very much lower signal strength. That shares 3 channels with Mendip (Chs 48, 52 and 56) but not the signals on Ch49 where the affected services are located (Mux PSB1-BBCA), so not that either especially as one receiver is fine and the other not. Same aerial, active splitter, tried swapping to no effect.
Problem is strongly believed to be how the Hauppauge is responding to the moved channels.
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Michael Perry
8:54 PM
8:54 PM
To KMJ, Derby
Good point, but not worth changing aerials too soon as the plan is not finalised yet, or so OfCom say. Mendip is a main transmitter for this area so if horizontal polarisation currently and has been since it was built. But the future changes planned will mean a change from C/D aerial and it may be that a WB will not be suitable either (it has reception in the 800MHz+ region where 4G will be).
It all seems badly thought through to me with so many 'retunes' being needed so often. Didn't have that anywhere near as much with analogue.
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M
Mazbar8:58 PM
Michael Perry: when you checked the aerial what is the signal strength in dbuv this can help to know
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Thursday, 4 April 2013
J
Jaz W12:24 AM
We have lost all signal from 7pm on all channels over the last 3 or 4 nights. I have tried retuning at least a dozen times - with aerial lead out before channel 48 to avoid the transmitter from Wales and with the aerial lead in.
The signal seems find in the morning and during the daytime. I have checked the map for the Mendip transmitter and see that we have NO coverage (we live in Lower Zeals (between Mere and Zeals in Wiltshire).
It driving me nuts!
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