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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
Friday, 23 December 2016
MikeP
sentiment_very_satisfiedPlatinum

4:14 PM

Martin:

Near the top os this page is a section showing the current and projected future channel usage of the Mendip main transmitter. It corresponds to that published by Ofcom recently.

I'm not sure where you are getting your channel allocation data from but it differs markedly from that already available. It is highly unlikely that it will be limited to channel ion the 32 to 36 plus 48 range.



link to this comment
MikeP's 3,056 posts GB
M
Martin
4:50 PM

Hello MikeP

This is turning into a dialogue of the deaf!

I repeat - PLEASE would you indicate exactly WHERE Ofcom have published the the details of the channels that will be used - and let me make this as clear as possible - AFTER the clearance of the 700 MHz band, ie when chs 48 upwards are taken away from TV transmissions, some time around 2019.

I am not in a position unfortunately to tell you the source of my information - which is frustrating for both of us. However, it was a complete list of the UHF channel allocations which will be used post 2019 (ish), and as I say Mendip - according to this list - won't be using the channels (22/25/28/40/43/46) that are indicated here on uktvfree.

I will of course be happy to concede this if you would be good enough to point me in the direction of this Ofcom publication on which you seem to be placing so much reliance.

link to this comment
Martin's 15 posts GB
M
Martin
4:53 PM

Sorry, that should of course read

<<ie when chs 49 upwards are taken away>>


link to this comment
Martin's 15 posts GB
Saturday, 24 December 2016
MikeP
sentiment_very_satisfiedPlatinum

4:15 PM

Martin:

I suggest you ask Briantist who runs this webs ite where he gets the data from.



link to this comment
MikeP's 3,056 posts GB
Monday, 26 December 2016
M
Martin
9:41 AM

Thanks MikeP. Good idea. I'll wait a bit and see if he sees this thread, if not I'll try and prompt him direct when the holidays are over.

FWIW there are nine standard channel groups under the new plan, each consisting of three UHF channels. Two of these new groups are 32/34/35 and 33/36/48. That's where the reference to "channels in the range 32-36, along with 48" comes from. So each 6 MUX main station will be allocated two of these new groups, although there are of course certain sites where other UHF channels have to be "borrowed", for example where one of the channels in a standard group is subject to interference from the continent.

Have a good holiday MikeP.

link to this comment
Martin's 15 posts GB
Thursday, 29 December 2016
C
Chris.SE
sentiment_very_satisfiedPlatinum

6:45 AM

In recent times I have found that the ability to search the OFCOM website for useful information has markedly reduced. Maybe this is part of some government policy to limit the information that can be discovered by us mere plebs. Whilst I will admit my search efforts have not been totally exhaustive, on this occasion I have been unable to locate any current documents on the OFCOM site that refer to channel allocation!! Nor can I find anything on Arqiva's site.
Briantist: perhaps you'd be kind enough to clear this up for us, and if possible, links to any relevant documents.

link to this comment
Chris.SE's 3,031 posts GB
Sunday, 8 January 2017
A
Andy
9:11 PM

Found I've had poor signals on freeview channels 17 etc recently.
Have recently lost channel 17
Have completely lost all the ITV and CH4 channels tonight - most annoying, 1/4 way through Endevour!
Has the power been reduced?

BBC channels fine!

link to this comment
Andy's 1 post GB
M
MikeB
sentiment_very_satisfiedPlatinum

9:40 PM

Andy: Check your system/signal strength - it sounds like your losing muxes, and thats a classic sign of loose connections, etc.

No, transmitters dont suddenly go to low power, unless there is work being done on them, and thats for only very brief periods.

link to this comment
MikeB's 2,579 posts GB
Monday, 9 January 2017
N
NigelW
6:36 AM

I've been having reception problems from Mendip all weekend in WSM, both on the ITV (D3+4) mux and on the BBC 4 (COM7) Mux.
BBCA and BBCB Mux appear to be unaffected, not sure about the others.

I can't find any faults listed online yet, could it be the weather conditions causing co-channel interference?

link to this comment
NigelW's 2 posts GB
MikeP
sentiment_very_satisfiedPlatinum

4:13 PM

NigelW:

there are no reported problems with the Mendip transmitter. If there were several hundreds of thousands of people would be complaining.

It is more likely that your system has some poor connections in the aerial feed to the equipment. Start by checking that all the aerial connectors are pushed in correctly and have no corrosion (simply take the aerial plugs out, check they are tight on the cable and then re-insert them in the socket they came from).



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MikeP's 3,056 posts GB
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