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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Sunday, 16 February 2014
M
Michael12:41 AM
Iain Davies: Plenty room on an 8Mb/s channel for what exactly? A 240p stream?
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I
Iain Davies11:58 PM
Mic. well as some of the broadcast channels carry up to 25 or more programme channels there is a lot of scope!!!
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Monday, 17 February 2014
MikeP
9:01 PM
9:01 PM
Michael
All depends on how the various signals are multiplexed together to form the broadcast stream. Many SD services have used the 64QAM method (works with DVB-T tuners) but HD and newer SD multiplexes use 264QAM which needs a DVB-T2 tuner. So it gets much more data into the same bandwidth data stream.
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Thursday, 13 March 2014
B
Bizman1:21 PM
The site shows COM7 & 8 as being from August 2014, but if I have read it correctly, DigitalUK are showing a retune date of 1-Apr-2014 for the channels on these muxes.
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Thursday, 20 March 2014
I
Iain Davies12:03 AM
You won't get MUX 7 & 8 from Mendip until later in the year as the TX aerials at the moment are for C/D transmissions, they need new aerials to cope in the CH 30s
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Sunday, 23 March 2014
I
Iain Davies2:21 AM
So what has happened to Made in Bristol? The test channel has now gone to EPG no. 75 as POP.
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B
barrie wreford11:57 AM
picked up a signal today sunday 23/03/14 on ch33 from the mendip tx,tried to tune hd box but to no avil so the new hd channels should be on pretty soon.
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M
Mike4:43 PM
barrie wreford: According to a516 information Mendip due to start transmitting
Com 7 on 1si April.
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Wednesday, 26 March 2014
I
Iain Davies8:01 PM
As I said in a previous post COM 7 & 8 will not be available until later in the year, as the C/D TX aerials neen to be changed to be able to handle the low 3X channels.
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Thursday, 27 March 2014
MikeP
9:18 PM
9:18 PM
The addition of COM 7 & 8 also means that a great many people who may wish to receive the programmes carried on these muxes later this year will need to change their receiving aerials. The current signals are transmitted in group C/D (covers channels 48-68 but channels 61-68 no longer used for DTTV) but the new ones will be in group A (channels 21-37) so a suitable wide band aerial will be needed. I would strongly advise using a log-periodic aerial as they have a fairly 'flat' response across the spectrum of TV signals whereas the 'traditional' wide band designs are not so good at the lower channel numbers.
A good log-periodic (they are the same for digital and analogue signals so don't be fooled by the marketing hype) will be adequate for any changes that may happen over the next several years, so an investment this year will last well if of good quality and well installed.
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