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.
This transmitter has no current reported problems
The BBC and Digital UK report there are no faults or engineering work on the Mendip (Somerset, England) transmitter._______
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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Sunday, 27 July 2014
C
Charles Stuart10:15 AM
Bristol
Jon, it's quite easy to fit a new aerial if you're able to reach the old one. A decent wideband aerial can be bought for £20 - I got one at Maplin - and if you have a compass or a compass app on a phone, you can align it easily.
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Charles's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage
C
Charles Stuart10:16 AM
Bristol
For some reason this site doesn't like the symbol for pounds sterling and it came out as a question mark.
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Charles's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage
J
jb382:05 PM
Jon: On the assumption that your TV or box is capable of receiving HD transmissions? such as BBC1HD / ITV1HD etc, then in order to determine if any signal is being received from the COM7 transmitter on Mux33, go into the tuning menu on whatever you are using and select "manual tune", if you then enter (or select) 33 but "not" followed by pressing search or scan, the strength of any signal being received (no matter how low) will appear on the signal bars.
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Friday, 1 August 2014
M
Mike2:56 PM
jb38 After considering using Rowridge horizontal and a very patient aerial installer to improve Com7 a high gain aerial was fitted although this improved reception but during high pressure times lost BBC &ITV so resorted to installing C/D aerial on Poole using Mendip for other channels now have signal strength of 90 quality 100 on all channels on Samsung 80 strength on You View qual 100 but can no longer get Com7 on any set.
The two aerials are connected by di-plexer or filter could this be the cause?
Signals from SW also seem blocked.
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J
jb385:19 PM
Mike: Yes, as each of the two inputs on the diplexer caters for a certain range of frequencies and attenuating any outside of the range, the problem being that COM7 (C33) is not in the range applicable for the reception of Mendips normal transmissions as its in the range used by Rowridge.
Unfortunately diplexer's cannot be used in situations such as this, the only option being to run individual cables from each of the two aerials.
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J
jb385:54 PM
Mike : In addition to that said, see if you can receive any signal if you carry out a "manual" tune on C31 Rowridges COM7 transmitter.
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M
Mike6:54 PM
jb38 No chance of signal from Rowridge as aerials are now Poole for PSB and Mendip
for all others [High Pressure does not affect Mendip fog sometimes will not a real problem]
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J
jb387:44 PM
Mike: In that case, then there is no reason why you cannot receive Mendip's COM7, that is unless the signal level received on C33 is that low that the slight loss introduced by the diplexer is enough to cause it to drop under the threshold for reception.
Of course DUK's reception predictor does not indicate that you can receive any signal from the COM7 transmitter at your location, although the predictor might not have been updated since COM7 increased in power from 17.5 Kw up to the level presently indicated of 72.35Kw compared to the six other Muxes on 100Kw, 72.35Kw not being exactly low powered compared to the differential on some other main stations, e.g: Rowridges (H) PSB's on 200Kw whereas its COM7 is only on 24.41Kw. References to power outputs taken from that indicated by DUK.
On the subject of the diplexer, hindsight is a great thing! insomuch that it might have been better if the aerial installer had just fitted an aerial combiner rather than diplexer, as then the only attenuation would have been the slight insertion loss as the signals passed though the device rather than on each of the two group determined inputs.
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M
mike7:54 PM
jb38: Thanks for all your help .I understand the situation better now . Will have to talk to installer to arrange another visit .Will let you know the outcome.
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MikeP
9:40 PM
9:40 PM
Mike
One possible solution that might be worth considering is the use of a coaxial switch. That will allow the siognals from both sources to be selected and fed to the euipment without significant reduction - but at the penalty of having to operate the switch to connect to the different source.
I used that method when I lived in Swindon and could get signals from both Mendip and Oxford - but not strongly enough to pass through a diplexer well enough for good reliable results.
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