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Full Freeview on the Mendip (Somerset, England) transmitter

first published this on - UK Free TV
sa_streetviewGoogle Streetviewsa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps51.237,-2.626 or 51°14'12"N 2°37'33"Wsa_postcodeBA5 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 18/09/2023 Pixelation or flickering on some or all channels Digital tick

Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name

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.

 H max
C32 (562.0MHz)591mDTG-100,000W
Channel icons
1 BBC One (SD) West, 2 BBC Two England, 9 BBC Four, 23 BBC Three, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, 250 BBC Red Button, plus 16 others

 H max
C34 (578.0MHz)591mDTG-100,000W
Channel icons
3 ITV 1 (SD) (West), 4 Channel 4 (SD) South ads, 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 South ads, 18 More4, 26 ITV4, 28 ITVBe, 30 E4 +1, 35 ITV1 +1 (West),

 H max
C35 (586.0MHz)591mDTG-100,000W
Channel icons
46 5SELECT, 101 BBC One HD West, 102 BBC Two HD England, 103 ITV 1 HD (ITV Meridian Southampton), 104 Channel 4 HD South ads, 105 Channel 5 HD, 106 BBC Four HD, 109 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

 H max
C48 (690.0MHz)591mDTG-8100,000W
Channel icons
20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 38 Channel 5 +1, 41 Legend, 42 Great! Movies Action, 57 Dave ja vu, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 CBS Reality, 69 HorrorXtra, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 91 WildEarth, 203 CITV, 208 Pop Player, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, plus 16 others

 H max
C33 (570.0MHz)591mDTG-8100,000W
Channel icons
 Smithsonian Channel, 11 Sky Arts, 17 Really, 19 Dave, 31 E4 Extra, 36 pick, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 60 Drama +1, 70 Quest +1, 71 That's 60s, 74 Yesterday +1, 75 That's 70s, 233 Sky News, plus 9 others

 H max
C36 (594.0MHz)591mDTG-8100,000W
Channel icons
 Quest Red +1,  Classic Hits, 12 Quest, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 52 GREAT! romance, 73 HobbyMaker, 76 That's 80s, 82 Talking Pictures TV, 83 Together TV, 84 PBS America, 90 Together TV +1, 235 Al Jazeera Eng, plus 19 others

 H -10dB
C30 (546.0MHz)591mDTG-1210,000W
Channel icons
from 22nd September 2014: 7 Made in Bristol,

DTG-8 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?

regional news image
BBC Points West 0.9m homes 3.4%
from Bristol BS8 2LR, 25km north (3°)
to BBC West region - 60 masts.
regional news image
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?

CheddarTransposer15 km E Weston-super-Mare1674 homes
LuccombeActive deflector6 km w Minehead38 homes

How will the Mendip (Somerset, England) transmission frequencies change over time?

1984-971997-981998-20102010-132013-182013-1727 Feb 2018
C49tv_off BBCABBCA

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

Jan 1958-Jul 1968Television Wales and the West
Jul 1968-Feb 2004Harlech Television
Feb 2004-Dec 2014ITV plc
Feb 1983-Dec 1992TV-am•
Jan 1993-Sep 2010GMTV•
Sep 2010-Dec 2014ITV Daybreak•
• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only. Mendip was not an original Channel 3 VHF 405-line mast: the historical information shown is the details of the company responsible for the transmitter when it began transmitting Channel 3.

Wednesday, 18 January 2023

3:06 PM

alan paterson:

As you haven't said where you are or given a full postcode we can't give any specific information other than there are no reported faults at Mendip. If you are to the north, signals are being received at normal levels. If you are to the south, current weather with any snow may be affecting your signal.

Check that your aerial looks intact and is still pointing in the correct direction and that the downlead is secure and not flapping in the wind. Check all your coax connections behind the TV etc.
Have you altered/changed anything about with your equipment recently? Do you have any distribution amp/splitter etc.?

You are never advised to retune when you have no signal or badly pixellated pictures as this usually just clears the correct tuning. Try a manula retune on Mendip's UHF channels.
Post back with a full postcode if you are still having problems.

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Chris.SE's 3,680 posts GB flag
alan paterson
4:19 PM


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alan paterson's 5 posts US flag
alan paterson
4:34 PM

Sorry ,post code shown. Aerial new 2 years ago, tried new indoor amp to no avail when all this break up first started last year, not been stable since. All equipment is good, TV's are smart TV's less than 4 years old. At one point called in an engineer who checked out all cables /connectors and confirmed strong signal when working from roof top aerial. 70 down the shute. One on line help site sent a free mobile mast filter as they thought a new mast nearby might be causing interference, but not making any difference. Of the channels I should get-32,33,34,35,36, and 48, all I have today is 32 and 36.
Aware of all the retuning /resetting advice, makes no difference, very frustrating.

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alan paterson's 5 posts US flag

8:36 PM

alan paterson:

Sorry, don't understand what you are saying about the postcode - can't see one. Looking at a previous post, if you are in Devizes, most parts should get a good signal from Mendip but without the postcode can't check if you are in a "not-spot" for some of the channels.

Look in your LG's TV Tuning section for Signal Strength and check and post back the figures for Signal Strength and Quality for each of the UHF channels from Mendip - 32, 33, 34, 35, 36 & 48.
You should have 100% Quality on each of those channels.
SOME locations may even get the Local multiplex on UHF C30.

You mention an indoor amp. What make and model is this?

Repeat the figures for each UHF channels with the amp disconnected and turned off, with the aerial plugged straight into the set, not via the amp. Too much signal can cause the symptoms you see especially if you are also getting signals from other transmitters (even when not tuned to them) which some locations in Devizes can get - eg. Wenvoe, Hannington, & Rowridge.

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Chris.SE's 3,680 posts GB flag

9:04 PM

alan paterson:

Just in case you are not sure where to find the information, it should be something like -
All Settings >Programmes >Programme Tuning & Settings >Signal Test
Then select each one in turn.

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Chris.SE's 3,680 posts GB flag
Thursday, 19 January 2023
alan paterson
11:24 AM

Chris, post code is SN103ES, Done all that you have suggested , what we have is channel 32, signal strength 46%, and channel 34 signal strength 18%. We have a 4G mobile mast to the north west (our signal from Mendip is due West correctly aligned) about 1.2 km away and I believe this is having an effect on our reception.
I have removed indoor amp and connected aerial direct to my LG smart tv, cleared all memory, reset manually each channel, makes no difference. Occasionally we will pick up another channel but pixelation/break up makes impossible viewing.
Now talking to Resolve TV again, they also thought mobile mast was problem and supplied a free filter, they may send an engineer at no cost to investigate. According to their remit they have authority from mobile license holders to resolve any issues due to mast interference at no cost to user. Will let you know outcome.

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alan paterson's 5 posts US flag
alan's: mapA's Freeview map terrainA's terrain plot wavesA's frequency data A's Freeview Detailed Coverage

1:51 PM

alan paterson:

Thanks for the postcode, you aren't in any not-spot for the signal from Mendip according to the predictions. UHF C32 & C34 could be the strongest according to the predictions. but there should be very little between them all.

Those Strength figures are quite low BUT it is the Quality figures that go with them that are very important. It would also be helpful to see figures for the other UHF channels without & with the amp.

Where is the Filter you currently have inserted. It should be BEFORE THE AMP !
At least you are getting good co-operation from and yes they are responsible for resolving any issues due to interference from a mobile mast!

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Chris.SE's 3,680 posts GB flag
Wednesday, 25 January 2023
bruce tearle

9:44 AM

Not really a transmission problem but would welcome any useful advise or indication if other are having similar trouble. Problem is............

Over recent months I have been unable to load Channel 4 via my HUMAX set to box.

Having selected C4 I receive all the pre-programme adverts but then get the 'this is disappointing etc.' screen.

I have tried reset the HUMAX box and resetting C34 which is the Mendip Transmitter channel but with no luck.

I my TV is a Samsung which is to old to receive the ITVX broadcast. Is this why I cannot get C4?

Advice would be most welcome.


Bruce Tearle

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bruce tearle's 51 posts GB flag

10:50 AM

bruce tearle: Do you mean the All4 catchup/streaming app? If so, it works using your internet connection and has nothing to do with any signals received via your aerial. What model of Humax box do you have? Have you tried BBC iPlayer or any other apps on the box? Your Samsung TV not being able to get ITVX has nothing to do with the All4 app.

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StevensOnln1's 3,548 posts GB flag
bruce tearle

11:19 AM

The set top box is FVP-4000T HUMAX and the TV is Samsung. The box and the TV are recognised as not being able to receive the new ITVX transmissions. Both receive TV signal via external aerial and copper coax cable.

Currently, there is no problems receiving other Freeview channels.

Hope this gives sufficient information



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bruce tearle's 51 posts GB flag
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Your comment please
Please post a question, answer or commentIf you have Freeview reception problems before posting a question your must first do this Freeview reset procedure then see: Freeview reception has changed, Single frequency interference, and Freeview intermittent interference.

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