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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Wednesday, 28 September 2011
M
Mal5:41 PM
SDN is 8k mode
Just done a full spectrum scan still no COM5 or PSB3.
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A
Alex B6:19 PM
Bristol
Thanks, Mike Dimmick; now, if only the advisor I spoke to on the phone at DUK had access to the same DUK Installer Newsletter...
Looking forward to being done with these regular retunes...
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Alex's: mapA's Freeview map terrainA's terrain plot wavesA's frequency data A's Freeview Detailed Coverage
C
craig7:18 PM
reset and returned and no channels on mux 48
disconnected aerial and turned off box
reset
tried manual retrune and still noc hannels on the mux 48
help please!
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J
James C7:36 PM
Highbridge
I'm all present and correct here as follows
near Highbridge
CH48/690000 SDN
CH52/722000 ARQ-B
CH54/738000 D3+4
CH58/770000 PSB3
Ch61/794000 BBCB
CH67/842000 ARQ-A
A bit of a mission to get a couple of older boxes to scan up right - One needed the 'first birthday' and the other I scanned 'aerial out' and then manually put the muxes in - I eventually got everything with the right channel numbers! - I'm not very optimistic about there being an end in sight, there is the March 28th retune already scheduled and then the new frequencies. More of the same I fear!!!
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James's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
M
Mal7:56 PM
ditto dvb-t are all 8k mode
I have reception of both COM5 & PSB3 now.
COM5 along with the rest giving out 754Mhz.
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Thursday, 29 September 2011
Thanks Mike, I've tested with nothing else plugged in so I'm guessing if it is interference its outside the building. Strangely though all other multiplexes are clear as a bell. Could it be that my aerial is not wideband? or would I miss other stuff too if this was the case?
Thanks,
Jack
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J
JimBilly12:48 PM
Jack
I think that your problem is channel 67 itself. As a higher frequency it is not robust and, for example, does not tolerate coax cable runs as well as lower channel numbers without attenuation even when the transmitted strength is the same.I have exactly the same problem with no reception on two tvs of channel 67 when all other multiplexes are fine, even channel 52 which is transmitted at almost exactly the same power as 67 at 25.7Kw.
Things will not improve until 67 moves back to channel 56 in March. As far as I can see there are no adjacent transmitters on 67 so I don't know why they can't transmit channel 67 stronger than 26Kw from now until March when Salisbury frees channel56 for high power transmission from Mendip.
Good luck
Jim
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D
D Gadsden3:33 PM
since yesterday 29th sept I have only been able to get the BBC channels.Trying any other and the screen is blank other than the words NO SIGNAL.Can tou tell me why please??
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D
D Gadsden3:36 PM
No reception from any chan ne except BBC,why is this?
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C
Chris.SE4:40 PM
D Gadsden:
I assume you are not getting your signals from Mendip but from one of the relay transmitters that only broadcast PSB multiplexes, otherwise you should be getting ITV, Ch4, Ch5 etc.
There was a re-tune event at Mendip on the 28th as 3 COM multiplexes moved channel, but also affected because of this were 3 Relay transmitters namely Hutton, Portishead & Woodcombe.
Wherever you get your signal, you need to do a re-tune of your receiver to get all the channels back, ideally do a factory reset from the Setup menu.
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