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, 1 April 2014
Charles Stuart: The "curves" for the various aerial groups are listed on Aerial group performance | Rigger's zone | ukfree.tv - 11 years of independent, free digital TV advice
Basically C/D is -30dB for C33, which is - in a nutshell - "signal blocked".
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Wednesday, 2 April 2014
MikeP
8:03 PM
8:03 PM
Charles Stuart:
Try doing a search for "Bristol Aerials", you will find there are quite a number of aerial retailers and installers in and around the Bristol area. many also sell other aerial related items and satellite equipment.
Remember, don't let them talk you into a 'digital aerial' as ALL UHF aerials are perfectly capable of receiving analogue and 'digital' signals. Just make sure you buy a good quality log periodic - it will last you well and be suitable for any future changes that may occur.
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I am near Bristol, I offer free estimates and certainly won't try and sell a digital aerial!
Regards
Andy
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Friday, 4 April 2014
I
Iain Davies7:13 PM
Here is an odd one, just installed a new aerial system on a house to replace a number of old c/d aerials feeding 4 rooms with a single w/b aerial via a 4 way amp. The location is north of Mendip so the local channel on 51 has a good signal level. All is well if each TV is fed straight from the aerial, but when you add the amp to feed each room you get "No Signal" on he local channel 51. All other channels are OK.
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MikeP
8:52 PM
8:52 PM
Ian
It is possible, and worth checking, that the gain of the 4-way distribution amplifier is giving too much signal at each TV set! Worth using a decent signal strength meter at the output from the aerial and then at each output of the dist. amp. Many digital tuners are not able to handle a strong signal so incorrectly report 'no signal' (they do that because the signal is too strong to be decoded so to the software it appears that there is no signal available, which is not the case). The fact that each set works normally with the direct input from the aerial but not with the amplified signal strongly suggests that may well be the case.
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Saturday, 5 April 2014
I
Iain Davies12:25 AM
MikeP, Thanks for that but it seems very strange that the high power channels work OK it's the low power local channel on 51 that gives the problem. Looking at the list of channels from Mendip the local channel looks as if it uses a different transmittion system to the others, I wonder if this is used so those outside the "local" area can't use amps to get it. Somehow the amp blocks the signal, perhaps for copywrite for local advertising? No good if you are trying to use a distribution amp!
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I
Iain Davies12:32 AM
Sorry, transmittion should be transmission!
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J
jb388:32 AM
Iain Davies: In addition to that said by MikeP but still relating to, although nothing is seen on C51 it does not necessarily indicate that zero signal exists, and so you should try a test by going into your TV (or boxes) tuning menu / manual tune then entering C51 into the box but "not" followed by pressing search or scan, as this procedure on most devices will result in the tuner acting like a form of signal meter free of threshold limits, albeit that overload conditions can affect this test.
This procedure should be tried both with, and without, the distribution amplifier connected in line, if the signal still vanishes with the amp in-line then try the same test on Mendips COM6 C52 and see what the result is.
Of course, another way of testing is to insert one of these cheap (around £4.00) variable attenuators in-line with the amplifiers aerial input socket, then check to see if C51 appears whilst you adjust the level of attenuation.
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I
Iain Davies10:07 AM
Jb38, thanks for that yes it shows there is full signal strength but no signal quality. As I said all other channels are ok, it just affects CH51.
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J
James2:25 PM
Highbridge
I've just rescanned my living room TV which has a DVB T2 tuner and was surprised to find what I presume is Com7 on Chennel 33 - All the new BBC HD channels, plus Al Jazeera HD etc on air - TV now appropriated by son to watch the footy, but I will check again later and confirm.
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James's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
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