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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.

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.

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, plus 17 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, 107 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! action, 57 Dave ja vu, 58 ITV3 +1, 59 ITV4 +1, 64 Blaze, 67 TRUE CRIME, 68 TRUE CRIME XTRA, 78 TCC, 81 Blaze +1, 83 Together TV, 91 WildEarth, 93 ITVBe +1, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, 267 Al Jazeera English, plus 30 others

 H max
C33 (570.0MHz)591mDTG-8100,000W
Channel icons
11 Sky Mix, 17 Really, 19 Dave, 31 E4 Extra, 36 Sky Arts, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 60 Drama +1, 65 That's TV 2, 70 Quest +1, 74 Yesterday +1, 75 That's 90s, 233 Sky News, plus 11 others

 H max
C36 (594.0MHz)591mDTG-8100,000W
Channel icons
12 Quest, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 52 GREAT! romance, 56 That's TV (UK), 63 GREAT! romance mix, 71 That’s 60s, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 235 Al Jazeera Eng, plus 18 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.

Friday, 6 July 2012

3:06 PM

Charles Stuart: Whatever method you are using to enter your post code is still resulting in a disallowed characters indication on DUK's reception predictor whereby I am still unable to properly assess your situation, however as far as your loft aerial is concerned I wouldn't really advise fitting a high gain aerial in a loft, as for any so called high gain aerial to operate as such it has to be "precisely" aimed at the transmitter, this meaning that there has to be a reasonable line-of-site situation applying in the first place with no obstructions between the aerial and the transmitter, the loft roof being the first obstruction as well as being more so if wet depending on the type of tiles used.

I fully realise that many people use a high gain aerial in situations such as this but there is always an element of self delusion about the results that's achieved, as an ordinary aerial (pref Log type) with a 10+db amplifier mounted close by will always give better results, thereby I would suggest that an aerial such as the type mentioned used in conjunction with a combined booster / splitter to feed the signal to the various positions is liable to result in a more satisfactory situation.

That said, based on what you have reported even just a booster / splitter used with the present loft aerial would likely be suffice, the log being favoured as it has a virtually even response across all channels provided its not one of the larger versions, a type called a DM log (even DM18) being ideal for most loft situations.

An example of the type referred to seen on the link.

ATV`s Choice Of Aerials for digital TV

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jb38's 7,179 posts GB flag
8:36 PM

Hi Mark Fletcher,
Sorry about that one letter post but for some reason I was not getting the regular email updates. I entered my details again and site said "already registered" which I knew.
I then sent that post as a test and the updates are now coming again.

link to this comment
Colin's 20 posts GB flag
Charles Stuart

11:31 PM

@ jb38 - When I entered my post code into this site it converted it into degrees longitude and latitude.

What is weird is that I can now receive the missing channels. I connected up the DVD recorder/player that I hadn't yet connected when I had the problem and it picked up the missing multiplex, though slightly weaker than the others, and then so did the PVR, TV and HD box. Is it possible that there might have been a short interruption to service on that multiplex on the 26th June? I cannot think why else I would have had tuning trouble then but not now. (51.4634,-2.5264) 

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Charles Stuart's 159 posts GB flag
Mark Fletcher

11:47 PM

Colin:No problem whatsoever !

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Mark Fletcher's 673 posts GB flag
Mark's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
Saturday, 7 July 2012

11:30 AM
Shepton Mallet

Charles Stuart: Well although its not exactly impossible for that to have been applying at the time you carried out the test, on having checked out Mendip's engineering page I don't see anything listed since June 10th, that is of course "if" you know for certain that you are receiving from that station as you did mention that good reception was being indicated from another three different transmitters albeit that I am unable to assess this for the reason mentioned.

I use DUK's trade view reception predictor as my main reference source as well as info on transmitter channels etc, and DUK's in common with other reception predictors works purely on an actual post code, so if you click on "Digital UK trade view" 3rd down the list at the right hand side of this posting you will get the prediction for reception at a Shepton Mallet test post code, if though you try the same on your own posting you will (or should) get the disallowed characters indication I mentioned.

The procedure to use is enter your post code in the site settings box provided (top right hand of page) and click on predict, then click on the transmitter name that is then indicated, and finally enter your query under the listings that appears for that particular transmitter.

Other possible reasons for the reception problem you were having could be due to atmospheric conditions applying at the time, or its simply the case that the signal you are receiving is not that terribly high above the reception cut off threshold level and that it had dipped under it, and so whilst reception is OK its always best to make a few signal strength checks across various channels such as 1 - 3 - 50 (only if HD is used) - 10 - 11 -12 as these programme numbers covers all six mux transmitters that's used for Freeview (full service) transmission, then if at any time a programme selected results in a blank screen carry out a signal check "whilst on that programme number" to see what the signal level is indicated as being, because unless the transmitter has failed an indication of strength will always be seen.

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jb38's 7,179 posts GB flag
jb38's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
11:57 AM

From Mendip I can receive:
Channel4 +1
Channel5 +1
ITV +1
ITV2 +1
E4 +1
Dave ja vu

However I cannot receive the following:
More4 +1
Yesterday +1
ITV3 +1
ITV4 +1
Film4 +1

Is my Freeview tuner faulty or what?

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Jim's 1 post GB flag

1:00 PM

Jim: According to the list I am looking at these are not Freeview channels.

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jb38's 7,179 posts GB flag
Charles Stuart

1:00 PM

@Jim - No, your tuner isn't faulty. You need Freesat for those channels that you can't get. They're not on Freeview.

@jb38 - I have considered atmospheric conditions but yesterday was about as nasty as it gets with very low pressure. The 26th was a bit better but not much, perhaps a bit like today. If anything, I think the roof aerial may be pointing just a fraction south of the south-west direction it's meant to point. The DVD player gives the easiest to understand signal measure. BBCA, D3+4, SDN and ArqA score 10/10 and ArqB scores 9/10, so there shouldn't be any problem. The machine has worked interference-free with scores of 7/10 and with occasional pixelation with scores of 6/10 and 5/10. The HD box measures BBCB at 99% for signal quality and 100% for signal strength. ArqB is on 56. Could the problem be a signal that's too strong? Or maybe I needn't worry about it any more as I'm now getting the multiplex. (51.4634,-2.5264) 

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Charles Stuart's 159 posts GB flag

1:27 PM

Charles Stuart: You should have absolutely no problem with reception in your location. I'm not sure what you managed to enter for your postcode, but when it managed to interpret something it put you near Ridgeway Rd. which you aren't. In the Site Setting box on the top RH corner of this page you should find a clickable [CLEAR] next to whatever you put in. You should enter your postcode in the following way BS15 1AZ as an example, that's letters BS figures 15 then space then figure 1 then letters AZ.
If you are using a standard keyboard and using the number pad on the right, make sure you have the Num Lock on.

The aerial should be pointing slightly south of SW so that sounds correct.
You loft aerial installation should be fine if you've not previously experience any problems since April.
When you say the roof aerial is minute, how many element does it seem to have?

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Chris.SE's 251 posts GB flag
Chris.SE's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage

2:41 PM

Charles Stuart: As far as your HD signal being too strong is concerned and which "will" always affect HD before SD with the latter in many cases appearing as perfectly OK, but in practically all situations where an excessively high signal genuinely exists this can easily be verified by trying a set top aerial, or alternately if not readily to hand then a short piece of wire (about 18" or so) connected into the aerial socket will suffice, as in both cases a picture of sorts will always be seen.

All of Mendip's multiplexes transmit on the same power and the levels you see indicated on your DVD device does indeed indicate a strong signal, which of course is possible as although your exact location is not known I did see on the terrain predictor that you are indicated at roughly 16 miles or so from the transmitter.

The only thing that I suggest you do is to verify what one of you two aerials gives the best reception by trying a test using the same device on both aerials, but remember though that the signal levels seen are dedicated to the sensitivity of the device being used for the test, and so the results obtained aren't really valid unless the same device is used on both aerials.

However as you were originally only querying why the signal would not pass through your box which was rectified by switching off the power saving on standby setting, then I will agree that you have nothing really to worry about.

By the way as far as post codes are concerned I fully understand why people are reluctant to give this info, but I generally always qualify this type of request by adding "or at least one from nearby such as a shop" as that is quite suffice, but in any query being made where it involves reception then for obvious reasons the persons location has to be known.

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jb38's 7,179 posts GB flag
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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.

If you have no satellite signal, see Sky Digibox says 'No Signal' or 'Technical fault'

If you have other problems, please provide a full (not partial) postcode (or preferably enter it in box at the top right) and indicate where if aerial is on the roof, in the loft or elsewhere.

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