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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 06/12/2021 Screen may go black 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-3100,000W
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

PSB2
D3+4
 H max
C34 (578.0MHz)591mDTG-3100,000W
Channel icons
3 ITV (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, 30 E4 +1, 35 ITV +1 (West),

PSB3
BBCB
 H max
C35 (586.0MHz)591mDTG-6100,000W
Channel icons
56 5SELECT, 101 BBC One HD (England no regional news), 102 BBC Two HD (England), 103 ITV 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

COM4
SDN
 H max
C48 (690.0MHz)591mDTG-8100,000W
Channel icons
12 Quest, 20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 41 Legend, 42 GREAT! movies action, 46 Channel 5 +1, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 CBS Reality, 74 Dave ja vu, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 203 CITV, 208 Pop Player, 211 Ketchup TV, 212 YAAAS!, plus 15 others

COM5
ArqA
 H max
C33 (570.0MHz)591mDTG-8100,000W
Channel icons
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, 57 Smithsonian Channel, 60 Drama +1, 70 Quest +1, 75 Yesterday +1, 83 Together TV, 233 Sky News, plus 9 others

COM6
ArqB
 H max
C36 (594.0MHz)591mDTG-8100,000W
Channel icons
 FreeSports, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 71 Quest Red +1, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 91 Classic Hits, 235 Aljazeera English, plus 18 others

LBS
 H -10dB
C51 (714.0MHz)591mDTG-1210,000W
Channel icons
from 22nd September 2014: 7 Made in Bristol,

com7
 H -1.4dB
C55 (746.0MHz)591mDTG-672,400W
Channel icons


DTG-3 64QAM 8K 2/3 24.1Mb/s DVB-T MPEG2
DTG-6 256QAM 32KE 2/3 40.2Mb/s DVB-T2 MPEG4
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?

1984-971997-981998-20102010-1327 Mar 132013-1727 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, 7 July 2019
David
9:42 AM

I have just bought a new Humax Freeview PVR (and I''m receiving the HD muxes for the first time, including the multiple BBC Red Button channels on com8.), Yesterday afternoon these channels kept briefly dropping out. The Humax signal test showed CH56 Strength 100%, Quality 100% - except when the signal dropped out, when it showed no signal at all.

I'm using a 10 or 20 year old aerial (not wideband) with a rooftop amplifier - not sure where to go next from here.

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David's 4 posts GB
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Chris.SE
sentiment_very_satisfiedPlatinum

9:47 AM

Fade2gray:

AFAIK there is no way to PM or email anyone, but rather than talk in "riddles", what is your 'possible' security concern then?

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Chris.SE's 3,025 posts GB
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Chris.SE
sentiment_very_satisfiedPlatinum

10:03 AM

David:

I would suggest wait and see if a problem persists. Depending on your location, you may get strong signals from Wenvoe and the COMs 7&8 on UHF 55 & 56 are now SFNs (single frequency networks) that could periodically cause interference. Also the current weather patterns may produce interference from other transmitters.

Another recent poster here lives where they can get signals from multiple transmitters being on high ground (I used to cycle around there as a teenager living not far away) and it can prove problematic but whether you repositioning your aerial might help, is difficult to say. You should remember though that these muxes are only temporary and are like to have gone sometime between 2020 & 2022 - by which time hopefully some of the other muxes will have become HD to accommodate the programmes.

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Chris.SE's 3,025 posts GB
David
11:14 AM

Thanks Chris.SE

Yes, we can definitely receive signals from Wenvoe here, so think that you have identified the cause of the problem

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David's 4 posts GB
F
Fade
11:53 AM

Chris.SE: said, "AFAIK there is no way to PM or email anyone, but rather than talk in "riddles", what is your 'possible' security concern then?"

"UK Free TV is here to help people. If you are rude or disrespectful all of your posts will be deleted and you will be banned."

I'll just wait until someone more informed might reply.

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Fade's 4 posts GB
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Chris.SE
sentiment_very_satisfiedPlatinum

12:34 PM

Fade:

Informed about what exactly? I've spotted some issues but not what I would call 'security' concerns.

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Chris.SE's 3,025 posts GB
N
nobody
sentiment_satisfiedBronze

5:54 PM

Fade: Try here:

https://www.twelvewinds.o…e-2/

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nobody's 38 posts FR
C
Chris.SE
sentiment_very_satisfiedPlatinum

7:40 PM

nobody: Thank you satman (Will) ;)

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Chris.SE's 3,025 posts GB
Monday, 8 July 2019
C
Carole
3:29 PM

Chris.SE: This is the situation. I was getting loads of channels on Friday morning. By 3 pm there was a problem with HD, and after that I could get no channels at all, despite doing everything you recommend, for the rest of the day. On Saturday morning I tried the retune again and it found all of the channels I had on Friday morning. Nothing has changed - my aerial is a wideband type, it has not moved, the cables are all fine, the tv is new.

I do not believe the problem is in my equipment. This is either a transmitter problem, a massive and unknown jamming problem, or the system on my equipment became non-functional for a few hours, then started working again. As I do not have the resources to check out these possibilities, I am now looking for a cable service I can rely on not to take up hours of my time every week.

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Carole's 6 posts GB
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Chris.SE
sentiment_very_satisfiedPlatinum

9:36 PM

Carole :

There is something very silly gong on here. Do not rush to a cable "solution", it will cost you!!
You have two aerials, yes the one on top certainly seems to be a wide band, but the one below it appears to be a "contract" aerial and is likely to be an enhanced C/D which should certainly give you good signals on most multiplexes if you were connected to it instead of the wideband.

So what sort of signal strengths and quality does your Signal Information menu give you on the UHF channels I asked about. I'm assuming you followed my suggestions for doing a manual tune after clearing any previous tuning.
Also I'm wondering if you may have too much signal - that can overload a receiver and make it appear insensitive.
When exactly did you start having problems?

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Chris.SE's 3,025 posts GB
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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.

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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