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Full Freeview on the Mendip (Somerset, England) transmitter

first published this on - UK Free TV
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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
Sunday, 22 September 2019
Transmitter engineering
sentiment_very_satisfiedOwner

5:08 AM

MENDIP transmitter - Freeview: BBC Digital TV Very Weak Signal; DSO related from 11:32 on 20 Sep to 13:08 on 20 Sep. [BBC]

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Transmitter engineering's 149,799 posts xx flag
Tuesday, 24 September 2019
A
Alan
9:44 PM
Weston-super-mare

Over the last few weeks we have had high blocking interference on ITV coming from the Mendip transmitter.
My location is BS22 9EF, the signal quality is all over the place, and the bit error is totally erratic. Very poor during early morning, but reduces up early evnning. BBC channels ok. Any idea's

link to this comment
Alan's 3 posts GB flag
Alan's: mapA's Freeview map terrainA's terrain plot wavesA's frequency data A's Freeview Detailed Coverage
C
Chris.SE
sentiment_very_satisfiedPlatinum

11:12 PM

Alan:

You should get pretty well perfect reception at your location. There's Planned Engineering at Mendip this week with "Possible weak signal" which might affect you, and in recent times there's been some tropospheric propagation which could cause interference from other transmitters using the same UHF channels but that should have subsided by now.

I assume that you have had a Group T/Wideband aerial since the retune event back in the summer. You should check in your TV tuning menus that you are tuned to the correct UHF channel (34) for the D3&4 multiplex from Mendip. You may have inadvertently auto-tuned to transmissions on 24 from the Hutton relay or on 23 from the Stockland Hill transmitter.

To check all the correct UHF channels, put you postcode into About us | Freeview

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Chris.SE's 4,101 posts GB flag
C
Chris.SE
sentiment_very_satisfiedPlatinum

11:20 PM

Phil:

My apologies for not replying to you sooner. Email updates aren't immediate, they are daily, weekly etc depending on what you selected. Tropospheric propagation in recent times causing interference from other transmitters will not have helped you but that should have now subsided. There's still Transmitter Engineering at Mendip this week with "Possible weak signal".

link to this comment
Chris.SE's 4,101 posts GB flag
Wednesday, 25 September 2019
Transmitter engineering
sentiment_very_satisfiedOwner

5:08 PM

MENDIP transmitter - Freeview: HD Digital TV Very Weak Signal; DSO related from 15:29 today. [BBC]

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Transmitter engineering's 149,799 posts xx flag
Transmitter engineering
sentiment_very_satisfiedOwner

8:08 PM

MENDIP transmitter - Freeview: HD Digital TV Very Weak Signal; DSO related from 15:29 today to 16:00 today. [BBC]

link to this comment
Transmitter engineering's 149,799 posts xx flag
Thursday, 26 September 2019
Transmitter engineering
sentiment_very_satisfiedOwner

5:08 AM

MENDIP transmitter - Freeview: HD Digital TV Very Weak Signal; DSO related from 15:29 yesterday to 16:00 yesterday. [BBC]

link to this comment
Transmitter engineering's 149,799 posts xx flag
Friday, 27 September 2019
Transmitter engineering
sentiment_very_satisfiedOwner

5:08 AM

MENDIP transmitter - Freeview: HD Digital TV Very Weak Signal; DSO related from 15:29 on 25 Sep to 16:00 on 25 Sep. [BBC]

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Transmitter engineering's 149,799 posts xx flag
Saturday, 28 September 2019
C
Chris.SE
sentiment_very_satisfiedPlatinum

9:34 PM

Brian Hudson:

I assume you've got your signal back now? Did you not see the Transmitter Engineering post(s) immediately prior to yours and on the previous page. Also two of mine on the 24th pointing out that - There's still Transmitter Engineering at Mendip this week with "Possible weak signal".

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Chris.SE's 4,101 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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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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