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Full Freeview on the Mendip (Somerset, England) transmitter

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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 25/03/2024 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
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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.

MuxH/VFrequencyHeightModeWatts
PSB1
BBCA
 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

PSB2
D3+4
 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),

PSB3
BBCB
 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

COM4
SDN
 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 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 TRUE CRIME, 68 TRUE CRIME XTRA, 78 TCC, 81 Blaze +1, 83 Together TV, 89 ITV4 +1, 91 WildEarth, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, 267 Al Jazeera English, plus 30 others

COM5
ArqA
 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

COM6
ArqB
 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), 61 GREAT! movies extra, 63 GREAT! romance mix, 71 That’s 60s, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 235 Al Jazeera Eng, plus 18 others

LBS
 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
C/D EEEC/D EC/D E TW TW T
C30_local
C32BBCA
C33com7com7
C34D3+4
C35com8com8
C36ArqB
C37C5wavesC5waves
C48SDNSDNSDNSDN
C49tv_off BBCABBCA
C51tv_offLBSLBS
C52tv_offArqBArqBArqB
C54tv_offC4wavesC4wavesC4wavesD3+4D3+4D3+4
C55tv_offcom7tv_off
C56tv_offArqAArqAArqACOM8tv_off
C58tv_offBBC1wavesBBC1wavesBBC1wavesBBCBBBCBBBCB
C61ITVwavesITVwavesITVwavesBBCA
C64BBC2wavesBBC2wavesBBC2waves

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.

Comments
Thursday, 29 September 2011
D
D Gadsden
3:36 PM

No reception from any chan ne except BBC,why is this?

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C
Chris.SE
sentiment_satisfiedSilver

4:40 PM

D Gadsden:
I assume you are not getting your signals from Mendip but from one of the relay transmitters that only broadcast PSB multiplexes, otherwise you should be getting ITV, Ch4, Ch5 etc.
There was a re-tune event at Mendip on the 28th as 3 COM multiplexes moved channel, but also affected because of this were 3 Relay transmitters namely Hutton, Portishead & Woodcombe.
Wherever you get your signal, you need to do a re-tune of your receiver to get all the channels back, ideally do a factory reset from the Setup menu.

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Chris.SE
sentiment_satisfiedSilver

5:30 PM

Briantist: Thanks for the update Brian :)
Mike Dimmick: Thanks for the updated info, I don't seem to have much time thses days so haven't kept up with late changes :(

Jack Sukerman:
As you say you have 10/10 signal on all the other MUXes, and that you didn't get Film4 etc when Arq B was on C67 prior to Sept.28 then if it's not local interference as has already been suggested it's likely to be your Aerial or Coax (or both!) as Mike has already implied.
What also won't help is that Arq A is now in 8K mode (previously 2K), the same as Arq B was when on C67.
If you still have an Analogue TV or Video, try tuning into C67 to see if you can pickup any analogue signal, If so, this would be the source of your problem.
Also, very strong signals on one channel can also sometimes cause interference on other channels, typically C+/-1, C+5, C+9 if I recall correctly off the top of my head, where C is the channel number of the strong signal.
Eg. you could have a very strong signal on C66, C68, or C62 or C58 (but not the Mendip PSB3-HD mux, that won't be strong enough, but obviously if you have an HD setup and receive it ok, the interference won't be on that channel!). Best of luck investigating - get back if you need more help, or to let us know the outcome/cure.

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Chris.SE
sentiment_satisfiedSilver

5:35 PM

Sean:
C61,C54,C48,C52,C67 - this last one will move to C56 in March next year.
All are now 8K mode, so any old equipment that was only getting ArqA and SDN prior to Sept.28th will now get nothing.

HD mux is on C58.

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S
Sean
5:39 PM
Bristol

Chris.SE:
You are a star! Thanks very much for that - now will go & "play".

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Sean's: mapS's Freeview map terrainS's terrain plot wavesS's frequency data S's Freeview Detailed Coverage
C
Chris.SE
sentiment_satisfiedSilver

5:42 PM

D Gadsden:
Woops, forgot Cirencester also affected, which is probably where you are, as you are still getting BBC mux, only D3&4 mux was affected here.

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Chris.SE
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5:53 PM

JimBilly:
C67 should not really be a problem in itself unless you are in a more marginal reception area now that the Mux (Arq A) is in 8K mode.
Jack says he's getting 10/10 signal on the other muxes, so he probably isn't marginal.
It's possible that a lot of people who were previously getting Arq A in marginal areas will not now get it until the power restriction of 26Kw goes (and move to C56) which happens in March 2012. Why they couldn't have left it in 2K mode until then, I don't know! - (they probably want to shove in some more LCN's on the mux!).

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Chris.SE
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6:03 PM

Briantist:
Hi Brian, I think I've found a bug :)
The last bit of my post has disappeared - it's gone into where my location would be (location not previously or intended to be entered at this time).
The tail end of my post on Tuesday 27 September 2011 10:25PM also disappeared or should I say didn't appear initially, but then appeared later, at some point after a subsequent post. Hmmm.

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