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 15/04/2024 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, 2 August 2011
J
John-Ha4:34 PM
Briantist
> There is a list of the switchover order ...
Thank you - that is a very useful site and just what I was looking for!
Nothing in the weeks before 27 July (in case it was delayed) or the weeks after (in case it was brought forward) seems relevant. The closest is Sudbury (London) upped the power of ArqA on Ch 60 to 100kW on 20 July, but I cannot see that being a problem with Mendip Ch 61. The other Sudbury mplex are on 41, 47, 56 and 58 so again no problem.
My line of sight to Cork is across water - do you think I could be getting Irish (or continental?) co-channel inteference?
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John-Ha: I'm still not sure what your postcode is, but you won't get a signal from the RoI or Sudbury (Essex) in the Bristol area.
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M
Mike Dimmick6:50 PM
Briantist: You may not get a detectable signal from Ireland or Sudbury, but you will get interference. For Ofcom's 800MHz clearance consultation, Arqiva provided a plan of how to handle it, which details potential interactions between Mendip and Rouen and Cap de la Hague, should it be allocated C48 and C51 to replace C61 and C62.
However, I suspect this is in the 1% case (e.g. ducting), not general problems with reception.
John_Ha: I'd start by checking that cables are still making good contact and that the aerial is intact. Cable insulation does deteriorate with exposure to UV light and water penetration becomes a possibility - higher frequencies are affected worse by water problems than lower ones.
Amplification can also cause a problem - digital TV requires very linear response, it can't handle any significant distortion. If you have an amplifier or booster, try removing it or turning it down. Amplifier power supplies can introduce ripple if they start to fail, and ripple in the PSU causes ripple on the output, which again causes periods of drop-out or distortion.
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M
Mike11:27 PM
The information for Mendip transmitter shows 3 mux's on VERY LOW output. When if ever, will these be of comparable power to the others? My signal is ok now (other than sometimes freezing or missing a few words ocasionaly) but with digital so far it seems a little bit of "different" weather will soon put paid to the "ok" signal.
Thank you.
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Wednesday, 3 August 2011
Mike: As it says above:
"Mendip SDN and Arqiva A will temporarily operate on channels 62+ and 56+ respectively (both at 10kW ERP) until September 2011. Final DSO channels will then be adopted, though ERP levels will remain limited until early 2012. Arqiva B will operate on channel 59+ (10kW ERP) until January 2011, when it will move to channel 67 at 26kW ERP until September 2011. Arqiva B's final DSO channel will then be adopted, though ERP will remain limited until early 2012. NOTE: ArqA increases from 10kW to 12.5kW on 28 September (changes to 64QAM mode and loses its current +167kHz offset.)"
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Friday, 5 August 2011
M
Mikei12:01 AM
I've been struggling with Mendip a lot since the last changes were made, Mux A, C and ARQ B are all breaking up, especially C which is completely unwatchable, no amount of antenna alignment seems to work.
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B
Bizman2:09 PM
Brian could you elaborate on LCNs 110 to 112 please, are they for internet TV or what?
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Saturday, 6 August 2011
Bizman: They seem to be place-holders for an IPTV service - see VISION TV network .
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Monday, 8 August 2011
Mikei: You have not provided a postcode, so this is general information.
As it says above "Mendip SDN and Arqiva A will temporarily operate on channels 62+ and 56+ respectively (both at 10kW ERP) until September 2011. Final DSO channels will then be adopted, though ERP levels will remain limited until early 2012. Arqiva B will operate on channel 59+ (10kW ERP) until January 2011, when it will move to channel 67 at 26kW ERP until September 2011. Arqiva B's final DSO channel will then be adopted, though ERP will remain limited until early 2012."
Which basically means you will have to wait for the full power services to start.
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Tuesday, 9 August 2011
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