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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 27/11/2023 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, plus 17 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, 28 ITVBe, 30 E4 +1, 35 ITV1 +1 (West),

 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

 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, 89 ITV4 +1, 91 WildEarth, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, 267 Al Jazeera English, plus 35 others

 H max
C33 (570.0MHz)591mDTG-8100,000W
Channel icons
 Smithsonian Channel, 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 Christmas, 70 Quest +1, 74 Yesterday +1, 75 That's 90s, 233 Sky News, plus 11 others

 H max
C36 (594.0MHz)591mDTG-8100,000W
Channel icons
 Quest Red +1,  Classic Hits, 12 Quest, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 52 GREAT! christmas, 56 That's TV (UK), 61 GREAT! movies extra, 63 GREAT! christmas mix, 71 That’s 60s, 73 HobbyMaker, 82 Talking Pictures TV, 83 Together TV, 84 PBS America, 235 Al Jazeera Eng, plus 20 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.

Wednesday, 2 April 2014

8:03 PM

Charles Stuart:
Try doing a search for "Bristol Aerials", you will find there are quite a number of aerial retailers and installers in and around the Bristol area. many also sell other aerial related items and satellite equipment.

Remember, don't let them talk you into a 'digital aerial' as ALL UHF aerials are perfectly capable of receiving analogue and 'digital' signals. Just make sure you buy a good quality log periodic - it will last you well and be suitable for any future changes that may occur.

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MikeP's 3,056 posts GB flag

9:17 PM

I am near Bristol, I offer free estimates and certainly won't try and sell a digital aerial!



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Andy's 57 posts GB flag
Friday, 4 April 2014
Iain Davies

7:13 PM

Here is an odd one, just installed a new aerial system on a house to replace a number of old c/d aerials feeding 4 rooms with a single w/b aerial via a 4 way amp. The location is north of Mendip so the local channel on 51 has a good signal level. All is well if each TV is fed straight from the aerial, but when you add the amp to feed each room you get "No Signal" on he local channel 51. All other channels are OK.

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Iain Davies's 38 posts GB flag

8:52 PM

It is possible, and worth checking, that the gain of the 4-way distribution amplifier is giving too much signal at each TV set! Worth using a decent signal strength meter at the output from the aerial and then at each output of the dist. amp. Many digital tuners are not able to handle a strong signal so incorrectly report 'no signal' (they do that because the signal is too strong to be decoded so to the software it appears that there is no signal available, which is not the case). The fact that each set works normally with the direct input from the aerial but not with the amplified signal strongly suggests that may well be the case.

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MikeP's 3,056 posts GB flag
Saturday, 5 April 2014
Iain Davies

12:25 AM

MikeP, Thanks for that but it seems very strange that the high power channels work OK it's the low power local channel on 51 that gives the problem. Looking at the list of channels from Mendip the local channel looks as if it uses a different transmittion system to the others, I wonder if this is used so those outside the "local" area can't use amps to get it. Somehow the amp blocks the signal, perhaps for copywrite for local advertising? No good if you are trying to use a distribution amp!

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Iain Davies's 38 posts GB flag
Iain Davies

12:32 AM

Sorry, transmittion should be transmission!

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Iain Davies's 38 posts GB flag

8:32 AM

Iain Davies: In addition to that said by MikeP but still relating to, although nothing is seen on C51 it does not necessarily indicate that zero signal exists, and so you should try a test by going into your TV (or boxes) tuning menu / manual tune then entering C51 into the box but "not" followed by pressing search or scan, as this procedure on most devices will result in the tuner acting like a form of signal meter free of threshold limits, albeit that overload conditions can affect this test.

This procedure should be tried both with, and without, the distribution amplifier connected in line, if the signal still vanishes with the amp in-line then try the same test on Mendips COM6 C52 and see what the result is.

Of course, another way of testing is to insert one of these cheap (around £4.00) variable attenuators in-line with the amplifiers aerial input socket, then check to see if C51 appears whilst you adjust the level of attenuation.

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jb38's 7,179 posts GB flag
Iain Davies

10:07 AM

Jb38, thanks for that yes it shows there is full signal strength but no signal quality. As I said all other channels are ok, it just affects CH51.

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Iain Davies's 38 posts GB flag
2:25 PM

I've just rescanned my living room TV which has a DVB T2 tuner and was surprised to find what I presume is Com7 on Chennel 33 - All the new BBC HD channels, plus Al Jazeera HD etc on air - TV now appropriated by son to watch the footy, but I will check again later and confirm.

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James's 11 posts GB flag
James's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
Iain Davies

5:15 PM

The saga continues, having failed to get CH51 through the distribution amp I thought I could feed the signal to a least one other room via the loop through using a Blu-ray recorder to be used with the main TV but even this blocked the signal for CH51. Again all other channels HD & SD no problem, I still think they don't want this channel distrubuted.

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Iain Davies's 38 posts GB flag
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