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 18/11/2024 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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Saturday, 12 June 2021
C
Chris.SE3:34 PM
Paul hudson:
If you mean Hill Rd. in WSM then you stand a chance BUT that's a guess on my part, we do need a full postcode to look at the predicted reception. If you look at the coverage map above with Pro-mode enabled and zoom in, you can see the general difficulties in the WSM area, but do not take the map as 100% accurate, these things aren't always the case (nor are predictors) but they give a general idea.
Which way are you neighbours aerials pointing? Are the rods (or squashed Xs) horizontal or vertical? If they are horizontal and pointing roughly ESE (although depending on location Hutton maybe roughly the same direction but vertical rods) then you may get Mendip, but a full postcode will give a far better idea.
If you want all multiplexes from Mendip, you'd need a Group T/Wideband aerial BUT if predicted reception (especially of COM7) isn't good, you might be better with a Group A and forget COM7 (but again you might get that off the back of the aerial from Wenvoe. Whatever, do not be tempted to buy one of these "baco-foil" aerials from certain DIY outlets, the first pigeon or two to land on it will bend things all over the place!
Once we know what the predicted reception might be and what your neighbours are getting, we should be able to give some sensible choices.
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Sunday, 13 June 2021
B
bruce james tearle5:16 PM
hi
what channel in the new news program 236 being broadcast on?
thanks
bruce
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S
StevensOnln15:54 PM
bruce james tearle: GB News is broadcast on the COM6 multiplex, which is on UHF channel 36 from Mendip.
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Monday, 14 June 2021
B
bruce james tearle12:10 PM
Thanks for info, will refresh my box.
bruce
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Wednesday, 16 June 2021
K
Kelvin Smith1:02 PM
Stonehouse
I live in Stonehouse No7 GL10 3QP and have a new roof top wide band aerial pointing at the Mendip transmitter but have bad signal quality on all the HD channels.
Using my TV signal information I get;
Ch Sig Quality BER
32 94% 100% 0
33 92% 76% 0
34 92% 50% 0
35* 92% 40% 1268
36 92% 48% 0
37 0% 0% 2,000
48 100% 100% 0
55 96% 0% 2,000
I get a slightly better HD pictures if I tune into Wales, but cannot move C5HD & C5HD to 104 & 105;
Ch Sig Quality BER
47 93% 70% 0
Should I change the aerial to Group B to try and get some more gain in signal strength? Other thoughts?
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Kelvin's: mapK's Freeview map terrainK's terrain plot wavesK's frequency data K's Freeview Detailed Coverage
K
Kelvin Smith1:05 PM
Stonehouse
I live in Stonehouse No7 GL10 3QP and have a new roof top wide band aerial pointing at the Mendip transmitter but have bad signal quality on all the HD channels.
Using my TV signal information I get
Ch Sig Qty BER
32 94 100 0
33 92 76 0
34 92 50 0
35 92 40 1268
36 92 48 0
37 0 0 2,000
48 100 100 0
55 96 0 2,000
I get a slightly better HD pictures if I tune into Wales, but cannot move C5HD & C5HD to 104 & 105;
Ch Sig Quality BER
47 93 70 0
Should I change the aerial to Group B to try and get some more gain in signal strength? Any other thoughts?
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Kelvin's: mapK's Freeview map terrainK's terrain plot wavesK's frequency data K's Freeview Detailed Coverage
S
StevensOnln11:44 PM
Kelvin Smith: If the figure of 96 for UHF channel 55 indicates a signal strength of 96% then you have a plenty strong enough signal for COM7 already, so fitting a grouped aerial is unlikely to help. BER of 2,000 would suggest that you have a high error rate so you are getting interference from somewhere. Do you have any HDMI cables close to your aerial lead? Poorly screened HDMI leads are a common source of interference and seem to particularly effect UHF channel 55, so try to keep them as separated as possible.
The Freeview detail coverage checker predicts that Ridge Hill would give a stronger signal on all multiplexes, which is the transmitter commonly used in Stonehouse, as Mendip is blocked by the hills in much of the surrounding area, so it may be worth considering realigning your aerial on a bearing of 328 degrees.
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B
bruce james tearle2:57 PM
following a successful retune of my box earlier in the week, channel 35 [gbnews] was dropping out this morning.
was this weaher relayed?
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Thursday, 17 June 2021
C
Chris.SE12:24 AM
bruce james tearle:
I think that was a typo there bruce, you meant C36 and yes, one of the predictors was showing quite strong Tropospheric Ducting this morning which will likely have resulted in quite a bit of co-channel interference. This should have subsided now, are your signals back to normal?
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C
Chris.SE1:20 AM
Kelvin Smith:
As StevensOnln1 says fitting a grouped aerial will not help, especially a B, as you will most likely see a major reduction in Signal for C55 and possibly C32.
As StevensOnln1 has also said, you have adequate signal strength there on all channels - except C37 which is not a Mendip transmission, that's the Local multiplex from Wenvoe and it's also possible you may get sufficient signal from an Oxford multiplex that uses C37 rendering Quality useless.
As has already been mentioned, as you have plenty of signal but low quality - high BER, then interference is the most likely cause. Especially if your aerial and flyleads aren't high quality double screened types, then if you have any HDMI leads near them this can cause interference.
Now there are two other possibilities, interference from other transmitters due to the Tropospheric Ducting that's been around for a few days, but as mentioned to bruce should now be cleared - are your figures any better? You should have 100% quality on all channels - which you should even still have if the signal was lower.
That leads me to the second possibility. Do you have any aerial amplifier/distribution system. If so, it could be you have too much gain. I find it strange that the signal the predictor gives that's likely to be your worst from Mendip (by some margin) is C48, yet your figures show it as the best!
Too much signal/gain will give the sort of numbers you are seeing. Once there is front end overload, the actual strength numbers on the set can decrease, as will the quality. So turn the gain control down and see what figures you then get. The strength figures could go quite low and yet you still get 100% Quality and a very low BER.
If you have no variable gain control, try the aerial direct to your main set and post the numbers.
As for Ridge Hill, although you can get ITV West on a separate multiplex from ITV Central, BBC1 and regional variations are Central, not West, so it'll depend which region you prefer.
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