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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Tuesday, 26 June 2012
M
Mark Fletcher10:58 PM
Lytham St. Annes
Bernie,Bristol.
I would look up "Single frequency interference" as a likely cause.
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Mark's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
Wednesday, 27 June 2012
L
Lordgeous1:43 PM
Bath
SORTED! Finally decided to get the professionals in and it turned out my distribution amp had failed! Last thing I thought of as some channels still had a strong signal, but now I realise that weaker channels were borderline and were'nt making it. A few minutes with a signal strength meter made this apparent. This explains why all was well until a few weeks ago which is when it must have gone up the spout! JOY! Can strongly recommend local ariel guy (if I'm allowed to post their details on here).
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Lordgeous's: mapL's Freeview map terrainL's terrain plot wavesL's frequency data L's Freeview Detailed Coverage
Friday, 29 June 2012
B
Ben Ward6:14 PM
Melksham
Ben Ward: jb38 I have been away and only seen your informative postings today. I will get back on to this tomorrow!
Thanks again.
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Ben's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
Saturday, 30 June 2012
J
jb386:25 PM
Ben Ward: OK! and will keep a look out for any posting you might make, although the main thing for you to check is whether or not the Humax has its aerial power facility disabled, because if it has then that points towards the problem being with the Panasonic TV.
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Sunday, 1 July 2012
B
Ben Ward10:08 PM
Melksham
Ben Ward: Lordgeous, it might be very handy for me anyway if you could post the details of your local ariel guy in case I needed to call on him. Not sure if that's allowed on here, and there doesn't seem to be a PM system.
Thanks.
link to this comment |
Ben's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
B
Ben Ward10:15 PM
Melksham
Thank you jb38 - the situation is that the Humax antenna power selector is now set to OFF; it was indeed switched ON when I checked. It doesn't seem to have affected the situation with the Panasonic (or indeed a Sony VTX-D800U I am using) however, still non-existant.
Cheers
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Ben's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
Monday, 2 July 2012
L
Lordgeous11:53 AM
Bath
OK Ben, its Wilts Ariels and his name's Kevin on 07817 212 508. (£45 call out charge). Good luck.
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Lordgeous's: mapL's Freeview map terrainL's terrain plot wavesL's frequency data L's Freeview Detailed Coverage
J
jb386:40 PM
Ben Ward: Thanks for that update, but before you call out anyone I would like if you could carry out another test or two based on you having previously mentioned that you were getting a 100% strength and quality indication on the Humax, the first being that I would like you to try the same test again now that you have turned off the Humax's aerial power supply facility, because if the signal indicated on the Humax is not now 100% nor anywhere near it, then that's liable to indicate that there is a powered booster in line.
Further advice dependant on the result.
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B
Ben Ward10:00 PM
Melksham
Will do, jb38 my posting about the helpful service engineer was just in case I ended up in a deadend. Will respond to your new question tomorrow (I'm out right now)
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Ben's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
Tuesday, 3 July 2012
B
Ben Ward8:59 PM
OK, I repeated the test I did before. Humax signal strength is about 75-80% and quality is 100%. Antenna power is off.
Transferring the aerial to the Panasonic and doing those tests again showed that strength varies from/flickers between 0-20% at best; quality varies from 85-100% which is pretty much what it was before when antenna power was on, on the Humax.
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