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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 05/06/2023 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

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.

 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, 250 BBC Red Button, plus 16 others

 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, 30 E4 +1, 35 ITV1 +1 (West),

 H max
C35 (586.0MHz)591mDTG-100,000W
Channel icons
56 5SELECT, 101 BBC One HD (England no regional news), 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, 109 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

 H max
C48 (690.0MHz)591mDTG-8100,000W
Channel icons
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, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, plus 15 others

 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

 H max
C36 (594.0MHz)591mDTG-8100,000W
Channel icons
12 Quest, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 71 Quest Red +1, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 88 Classic Hits, 235 Al Jazeera Eng, plus 19 others

 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
C49tv_off BBCABBCA

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.

Monday, 3 October 2011

9:16 AM

You many now have "too much" signal. Remove any aerial boosters. Use male-to-male coax connectors for shortest run directly from aerial to nearest digibox or receiver. If no signal, do a factory retune, manually by channel if possible. If joy, you have too much signal. Permanently remove booster amplifiers. Consider fiting new sat-grade coax. If inaccessible masttop booster : take great care or consult a professional rigger. If you have a reasonable view from an upstairs window in the direction of the Mendip mast, try pointing a temporary aerial out the window to ascertain whether you have a strong signal or not. If only ch67 remains elusive, see issues relating to its temporarily higher frequency on this page. Confer with neighbours to see if they are similarly affected.

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michael's 857 posts GB
Son in Law
10:41 AM

ITV3 transmitted from Mendip is this on low power? Receiving channel ok at SP8 5PY but 1.5miles down the road at SP8 4AD no luck at all. No apparent problem with other channels.

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Son in Law's 1 post GB
derek gregory
8:34 PM

about 10 days ago I lost Yesterday
I retuned and it came back
3 days ago I found I had lost Dave on Ch 19

I have retuned several times but it does not come back

I used to have about 110 channels, now I am down to 85. It makes no difference whether my loft amp is on or not

Ilive in Castle Cary and have a communal aerial system cabled into the house.

How can I get Dave back? I miss him


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derek gregory's 1 post GB
Tuesday, 4 October 2011
Mr. J. Talboys
11:54 AM

My TV loses most of the channels, ch. 10 and upwards when I switch to stand by. I have to retune every time I switch on. Any advice would be much appreciated. Aerial is on roof.

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Mr. J. Talboys's 2 posts GB
12:08 PM

Since the re tune that was required as channels were lost I now do not recieve BBC 1 Bristol area I now recieve BBC SW with a very grainy picture. BBC west seems to have disapeared. I also get a lot of picsalating and break of service, never had this before the service improvements!! were made. Any suggestions?

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Brian's 2 posts GB
Mike Dimmick

1:37 PM

Brian: You presumably have a box that stores the first version of the channels that it finds. Due to the hot weather, the signals from distant transmitters have been coming through a lot more strongly and were - presumably - strong enough to be detected.

See Digital Region Overlap for tips on resolving this problem, although it may well go away if you retune once this spell has passed. For now, you may find the correct service somewhere else in the channel list, e.g. around 800.

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Mike Dimmick's 2,486 posts GB
Mike Dimmick

1:56 PM

Son in Law: The SDN multiplex, which carries ITV3, is at full power since last week's retune.

The prediction at SP8 4AD is much better than that at SP8 5PY, so I would expect something different in the receiving set-up.

C48 is in Group C/D, but only just. If the aerial is quite old it might not work very well down at that frequency - the groups were extended to squeeze in Channel 5 when it launched in 1997. It might be worth going wideband now, as there may be new services as far down as C33 (although this has not yet been finalized).

This frequency hasn't ever been used before at Mendip. If this is a residential block with a communal aerial - bird's eye view on Bing suggests it might be - it could be a channelised system and the system would require retuning to amplify this channel rather than the previous location. The levels might need to be recalibrated too, even if it isn't channelised.

The overall signal levels are substantially increased since last week, and that could push a system that was working into having too much signal. See Freeview signals: too much of a good thing is bad for you | - independent free digital TV advice for more information. (SP8 4AD) (SP8 4AD)

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Mike Dimmick's 2,486 posts GB
Mike Dimmick

1:59 PM

Mr. J Talboys: This can often happen if you use the 'automatic search' facility and the box has run out of permanent storage memory. Or, some boxes apparently don't overwrite the permanent locations with this facility.

At major retunes you are recommended to reset the box to a blank state, using the Factory Reset, Default Setting, 'Reinstall All Channels', Full Retune, First Time Installation or Virgin Mode options. Different equipment calls it different things. There are retune guides for some equipment, and full manuals for some others, at TV Re-tune .

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Mike Dimmick's 2,486 posts GB
Stan Hill
3:06 PM

Since recent changeover I cannot get all of the channels I was getting before. I cannot get ITV3 or Dave. Also when try 813 BBC News channel I get G O L D scrambled. So what has gone wrong?

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Stan Hill's 1 post GB
3:29 PM

Mike:- Thanks I will retune in a day or 2. It isn't a box though it is thr TV. I may buy a freesat HD box though and be done with it as the pick up is suspect and I have a sky dish on the wall already.

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Brian's 2 posts GB
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