Full Freeview on the Mendip (Somerset, England) transmitter
Brian Butterworth first published this on - UK Free TV
Google Streetview | Google map | Bing map | Google Earth | 51.237,-2.626 or 51°14'12"N 2°37'33"W | BA5 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.
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Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
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 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.
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?
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?
Cheddar | Transposer | 15 km E Weston-super-Mare | 1674 homes |
Luccombe | Active deflector | 6 km w Minehead | 38 homes |
How will the Mendip (Somerset, England) transmission frequencies change over time?
1984-97 | 1997-98 | 1998-2010 | 2010-13 | 2013-18 | 2013-17 | 27 Feb 2018 | |||
C/D E | E | E | C/D E | C/D E T | W T | W T | |||
C30 | _local | ||||||||
C32 | BBCA | ||||||||
C33 | com7 | com7 | |||||||
C34 | D3+4 | ||||||||
C35 | com8 | com8 | |||||||
C36 | ArqB | ||||||||
C37 | C5waves | C5waves | |||||||
C48 | SDN | SDN | SDN | SDN | |||||
C49tv_off | BBCA | BBCA | |||||||
C51tv_off | LBS | LBS | |||||||
C52tv_off | ArqB | ArqB | ArqB | ||||||
C54tv_off | C4waves | C4waves | C4waves | D3+4 | D3+4 | D3+4 | |||
C55tv_off | com7tv_off | ||||||||
C56tv_off | ArqA | ArqA | ArqA | COM8tv_off | |||||
C58tv_off | BBC1waves | BBC1waves | BBC1waves | BBCB | BBCB | BBCB | |||
C61 | ITVwaves | ITVwaves | ITVwaves | BBCA | |||||
C64 | BBC2waves | BBC2waves | BBC2waves |
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
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Thursday, 3 February 2011
You do a good job here Brian, I take my hat off to you.
All the best mate
Dave
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Friday, 4 February 2011
J
John7:48 PM
I am getting very variable signal strength on the BBC multiplex at 7:45 tonight watching the England-Wales rugby programme. Normally the quality is rock steady at 100% but while it is at 100% mostly, it is dropping to 30% or 40% for a second every now and then. Strength is 58 to 60%.
Strangely, all the other multiplexes, including the low power ones, are absolutely fine, with rock steady 100% quality (eg ITV is 62% strength, 100% quality).
It is very windy but I have checked and my aerial is not moving in the wind.
Does anyone have any ideas?
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T
Tracy8:05 PM
Shepton Mallet
Since yesterday we have been unable to watch any of the bbc channels, all of them are blocky and keep on freezing. Its been very windy today but yesterday it wasn't like that.
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Tracy's: mapT's Freeview map terrainT's terrain plot wavesT's frequency data T's Freeview Detailed Coverage
Saturday, 5 February 2011
John: There is a weather front moving over the UK causing tropospheric ducting aka What is the Inversion Effect and why does it effect my Freeview TV reception?
| ukfree.tv - independent free digital TV advice .
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P
PeteGreen11:18 AM
When I check my terrain to the transmitters it shows my alitude as 79 meters. Google earth shows 6 meters which is correct. Is it possible to to change this. Pete.
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C
Chris.SE11:39 AM
Briantist:
Hi Brian, an update to the "Transmission frequencies" section (just above "Notes") on this page would be a nice idea to resolve some confusion.
In the Note below "After Wednesday 7th April 2010" it still mentions C59+ for ArqB now on C67 until 28 Sep 2011, when it moves to C52. On the same date SDN moves to C48.
Also C48 and C52 are missing from the "After Wednesday 7th April 2010" mux list row.
Regards, Chris.
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PeteGreen: At some point there will be a new database, but I never get chance to implement it due to answering peoples questions.
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Chris.SE: Sorry, Mendip is a little unusual, I have to keep making manual changes to the database. I've still got to go through all the Ofcom updates. Apologies for the delay.
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