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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.

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
Saturday, 12 August 2017
T
Tom
9:45 AM

Mike P. Thanks very much, very helpful. Tom.

link to this comment
Tom's 2 posts GB
Monday, 4 September 2017
L
Luke
4:35 PM
Bristol

No signal from bs4 1sz

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

7:55 PM
Peterborough

Luke: But apparently its working fine, if you look at the top of the page - check your system.

link to this comment
MikeB's 2,579 posts GB
Tuesday, 12 September 2017
I
Iain Davies
12:18 AM

I live to the south of Mendip, until last Friday the local mux on CH 51 was non existant but now there is 100% signal and 100% quality. Has the mux on CH 51 been put on the main aerial?

link to this comment
Iain Davies's 11 posts GB
S
StevensOnln1
sentiment_very_satisfiedPlatinum

10:22 AM

Iain Davies: I doubt the local mux has been moved to the main aerial as it would cause massive interference with the Cardiff local mux which is also broadcast on C51 from Wenvoe, which has large areas of overlap with the main muxes from Mendip.

link to this comment
StevensOnln1's 3,358 posts GB
MikeP
sentiment_very_satisfiedPlatinum

10:24 AM

Ian Davis:

There has not been any engineering work reported at Mendip so there has been no known change to the aerial usage.

100% signal strength is too much. What is it like on the other multiplexes? You ideally need between 60% and 85% for good reliable reception, any more and there is a high risk of break-up and the strength should be reduced by using an attenuator or turning down the gain of any amplifier fitted in the aerial cable.



link to this comment
MikeP's 3,056 posts GB
I
Iain Davies
8:06 PM

Something has happened, as from zero % age to 100%. This shows on the signal meters on my Panasonic blu-ray recorder and Humax HD hard drive box. I used to live to the north of Mendip but now living south as I said until last Friday the signal was nil!

link to this comment
Iain Davies's 11 posts GB
Wednesday, 20 September 2017
I
Iain Davies
1:23 PM

Strange one here, signal dropped a lot only get CH 51 on outdoor Mendip aerial now. Was able until the other day get it via the back of a Stockland Hill aerial, now no signal!!!

link to this comment
Iain Davies's 11 posts GB
Thursday, 21 September 2017
MikeP
sentiment_very_satisfiedPlatinum

4:14 PM

Ian Davies:

From what you report it very much sounds as if you have problems with your aerial or the cables connecting it to the TV set. Please carefully check all the connections and ensure thatbthere is no visible damage to the cables. then unplug all aerial onnections and plug them back in (that is to ensure there is no oxidation of the contacts, which often causes the problems you report. Then check the signal strengths of all the multiplexes broadcast from Mendip, they should be no less that 50% for the SD services and no less than 60% for the HD services. None of them should be more that 85%, if they are then that will also cause the problems you report.

Finally, please enter you full post code so thet we contributors can check what the signal transmission and reception conditions are at your exact location.




link to this comment
MikeP's 3,056 posts GB
Friday, 22 September 2017
I
Iain Davies
5:58 AM

MikeP nope nothing wrong with my aerial system, brand new just installed by me. I have installed 1000s of aerial systems with no problems, from the North of Scotland where there was hardley any signal to places you could get perfect reception on a two inch nail!

link to this comment
Iain Davies's 11 posts GB
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