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Full Freeview on the Llanddona (Isle of Anglesey, Wales) transmitter

first published this on - UK Free TV
sa_streetviewGoogle Streetviewsa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps53.307,-4.128 or 53°18'25"N 4°7'41"Wsa_postcodeLL58 8YB

 

The symbol shows the location of the Llanddona (Isle of Anglesey, Wales) transmitter which serves 44,000 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.

This transmitter has no current reported problems

The BBC and Digital UK report there are no faults or engineering work on the Llanddona (Isle of Anglesey, Wales) transmitter.

Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name
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Which Freeview channels does the Llanddona 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.

MuxH/VFrequencyHeightModeWatts
PSB1
BBCA
 H max
C40 (626.0MHz)255mDTG-320,000W
Channel icons
9 BBC Four, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, 250 BBC Red Button, plus 13 others

PSB2
D3+4
 H max
C43- (649.8MHz)255mDTG-320,000W
Channel icons
5 Channel 5 (SD), 6 ITV 2, 10 ITV3, 14 Film4, 15 Channel 4 +1 South ads, 18 More4, 24 ITV4, 33 ITV +1 (Wales),

PSB3
BBCB
 H max
C46 (674.0MHz)255mDTG-620,000W
Channel icons
74 Shopping Quarter , 104 Channel 4 HD South ads, 105 Channel 5 HD, 204 CBBC HD, plus 1 others

COM4
SDN
 H -3dB
C41 (634.0MHz)255mDTG-810,000W
Channel icons
12 Quest, 20 Drama, 21 5USA, 27 ITV2 +1, 28 E4 (Wales), 30 5STAR, 31 Paramount Network, 34 ITV3 +1, 44 Channel 5 +1, 54 5SELECT, 58 ITVBe +1, 59 ITV4 +1, 63 Blaze, 66 CBS Reality, 70 Horror Channel, 77 TCC, 80 Blaze +1, 203 CITV, 211 Ketchup TV, plus 16 others

COM5
ArqA
 H -3dB
C44 (658.0MHz)255mDTG-810,000W
Channel icons
11 pick, 17 Really, 19 Dave, 23 CCXTV, 28 E4 +1, 29 4Music, 38 Quest Red, 41 Food Network, 45 Film4 +1, 46 Challenge, 47 4seven, 57 Smithsonian Channel, 75 Yesterday +1, 76 Quest +1, 78 Now 70s, 88 Together TV, 233 Sky News, plus 8 others

COM6
ArqB
 H -3dB
C47 (682.0MHz)255mDTG-810,000W
Channel icons
25 Yesterday, 32 Sony Movies, 37 DMAX, 39 CBS Justice, 42 HGTV, 67 CBS Drama, 79 Dave ja vu, 81 Talking Pictures TV, 91 PBS America, 234 RT, 235 Aljazeera English, plus 18 others

DTG-3 64QAM 8K 2/3 24.1Mb/s DVB-T MPEG2
DTG-6 256QAM 32KE 2/3 40.2Mb/s DVB-T2 MPEG4
DTG-8 64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)

Are you trying to watch these 12 Freeview HD channels?

the effected channels

The Llanddona (Isle of Anglesey, Wales) mast is not one of the extended Freeview HD (COM7 and COM8) transmitters, it does not provide these high definition (HD) channels: BBC Four HD, BBC News HD, CBeebies HD, Forces TV, FreeSports, More4 +1, NOW 80s, PBS America +1, Pick +1, Together TV +1, Quest Red +1, RT HD.

If you want to watch these HD channels, either use Freesat HD, or move your TV aerial must point to one of the 30 Full Freeview HD transmitters. For more information see the want to know which transmitters will carry extra Freeview HD? page.

Which BBC and ITV regional news can I watch from the Llanddona transmitter?

regional news image
BBC Wales Today 1.2m homes 4.7%
from Cardiff CF5 2YQ, 210km south-southeast (164°)
to BBC Wales region - 206 masts.
regional news image
ITV Cymru Wales 1.2m homes 4.7%
from Cardiff CF5 6XJ, 213km south-southeast (165°)
to ITV Wales region - 206 masts.

How will the Llanddona (Isle of Anglesey, Wales) transmission frequencies change over time?

1950s-80s1984-971997-981998-20092009-132013-182013-1714 Nov 2018
VHFC/D EC/D EEE TE TE TB E T
C1BBCtvwaves
C40 ArqBArqBBBCA
C41SDN
C43SDNSDNSDND3+4
C44ArqA
C46DArqAArqAArqABBCB
C47ArqB
C50tv_off1ArqB
C51tv_off_local_local_local_local
C53tv_offC4wavesC4wavesC4wavesBBCBBBCBBBCB
C54tv_off+2
C57tv_offBBC1wavesBBC1wavesBBC1wavesBBCABBCABBCA
C58tv_off+A
C60tv_offITVwavesITVwavesITVwaves-D3+4-D3+4-D3+4
C61+B
C63BBC2wavesBBC2wavesBBC2waves
C64+C

tv_off Being removed from Freeview (for 5G use) after November 2020 - 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 21 Oct 09 and 18 Nov 09.

How do the old analogue and currrent digital signal levels compare?

Analogue 1-4 100kW
BBCA, D3+4, BBCB(-7dB) 20kW
SDN, ARQA, ARQB(-10dB) 10kW
Mux 1*, Mux 2*, Mux A*, Mux B*, Mux C*, Mux D*(-20dB) 1000W

Which companies have run the Channel 3 services in the Llanddona 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. Llanddona 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.

Comments
Saturday, 1 December 2018
Transmitter engineering
sentiment_very_satisfiedOwner

4:31 AM

LLANDDONA transmitter - DAB: BBC National DAB Radio Off Air from 10:44 on 29 Nov to 11:20 on 29 Nov. FM: Radio 1 FM Weak Signal from 10:40 on 29 Nov to 15:05 on 29 Nov, Radio 2 FM Weak Signal from 10:40 on 29 Nov to 15:05 on 29 Nov, Radio 3 FM Weak Signal from 10:40 on 29 Nov to [BBC]

link to this comment
Transmitter engineering's 131,066 posts xx
Sunday, 2 December 2018
T
T.M. James
2:08 PM

Could you please tell me when COM 7 AND COM 8 will be available from the LLANDDONA transmitter?
I am particularly interested in receiving BBC4 HD. Occasionally I can receive it from the 'Moel y Parc' transmitter but it is 'very touch and go' and can not be depended upon in my region

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T.M. James's 2 posts GB
T
T.M. James
2:08 PM

Could you please tell me when COM 7 AND COM 8 will be available from the LLANDDONA transmitter?
I am particularly interested in receiving BBC4 HD. Occasionally I can receive it from the 'Moel y Parc' transmitter but it is 'very touch and go' and can not be depended upon in my region.

Thank you.

link to this comment
T.M. James's 2 posts GB
S
StevensOnln1
sentiment_very_satisfiedPlatinum

2:17 PM

T.M. James: COM7 & COM8 are not being added to any additional transmitters. They are temporary services which are expected to close by 2022.

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StevensOnln1's 2,860 posts GB
Thursday, 27 December 2018
G H Davies
8:54 PM

Is there a direct correspondence between the Winter Hill
Mux1, Mux2, Mux3, Mux 4, Mux 5, Mux 6, and the Llanddona
Psb1,Psb 2, Psb 3, Psb 4, Psb 5, Psb 6 .? Please.

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G H Davies's 1 post GB
MikeP
sentiment_very_satisfiedPlatinum

9:11 PM

G H Davies:

Llanddona has multiplexes named PSB1, PSB2, PSB3, COM3 (SDN), COM5 (ARQA) and COM6 (ARQB). This is exactly the same naming scheme as at Winter Hill, but the muiltiplexes are on different frequencies so as to avoid interfering with each other or other transmssions in the same reception area. The naming of a multiplex is for convenience mainly but all full Freeview transmitters carry all six multiplexes and a further 30 main transmitters also carry the COM7 and COM8 multiplexes. In addition there are a large number of Freeview Light transmitters that carry the 3 PSB services only. Apart from regional variations, for local news for example, the programming is largely the same for all national programming.



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MikeP's 3,055 posts GB
Thursday, 10 January 2019
F
fn engineers
12:11 PM

Since the 700Mhz clearance event on the 14th Nov 2018, I have had a large number of customers reporting problems in receiving Com 4, 5 and 6 including myself. I can report that signal strength in each case is always good but signal quality has deteriorated and is now very poor with frequent vision breakup. I am personally having problems with Com 6 where signal strength is consistently above 95%, however quality is always around 20%. I live in direct line of sight of the Llanddona transmitter and previous to the frequency changes these mux's were not giving me and other people any problems. Please can you tell me what else changed on the 14th of November?

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fn engineers's 2 posts GB
MikeP
sentiment_very_satisfiedPlatinum

4:39 PM

fn engineers:

You should by now know that signal strengths above about 85% are likely to give pixilation or loss of channels. Too much signal strength is a bad thing (there's an article on this wen=bsite about that, you can search for it). In such cases reducing the signal; strength to between 60% and 85% usualy solves the problems.



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MikeP's 3,055 posts GB
F
fn engineers
10:48 PM

Yes, I agree MikeP. However, when I remove the dist. amplifier and have direct feed from the antenna the strength will drop to around 74% but quality is then around 10% with an unwatchable picture. The 2 PSB mux's which are double the power are not giving me any problems whatsoever (strength about the same and quality around 80%). The weather obviously affects things and evenings worse, so I am beginning to wonder whether there are any underlying signals from Ireland which are affecting reception. I have an elderly lady who lives down the road that's completely lost picture from Com4 & 5 since the frequency change with com 6 appearing occasionally but her TV will show channel id and indicate a signal strength of around 60% for these muxs.

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fn engineers's 2 posts GB
Friday, 11 January 2019
MikeP
sentiment_very_satisfiedPlatinum

11:10 AM

fn engineers:

I suggest you have a look at the Digital UK Coverage Checker at Digital UK - Coverage checker to ensure that the correct channels are being used.



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MikeP's 3,055 posts GB
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