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Full Freeview on the Limavady (Northern Ireland) transmitter

first published this on - UK Free TV
sa_streetviewGoogle Streetviewsa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps55.108,-6.887 or 55°6'30"N 6°53'14"Wsa_postcodeBT49 9LJ

 

The symbol shows the location of the Limavady (Northern Ireland) transmitter which serves 45,000 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.

Are there any planned engineering works or unexpected transmitter faults on the Limavady (Northern Ireland) mast?

Limavady transmitter - Limavady transmitter: Possible effect on TV reception week commencing 25/03/2024 Pixelation or flickering on some or all channels Digital tick


Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name
_______

Which Freeview channels does the Limavady 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
C41 (634.0MHz)382mDTG-20,000W
Channel icons
1 BBC One (SD) Northern Ireland, 2 BBC Two Northern Ireland, 9 BBC Four, 23 BBC Three, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, plus 14 others

PSB2
D3+4
 H max
C44 (658.0MHz)382mDTG-20,000W
Channel icons
3 UTV (SD) (UTV), 4 Channel 4 (SD) NI ads, 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 NI ads, 18 More4, 26 ITV4, 28 ITVBe, 30 E4 +1, 35 UTV +1 (UTV),

PSB3
BBCB
 H max
C47 (682.0MHz)382mDTG-20,000W
Channel icons
46 5SELECT, 101 BBC One HD Northern Ireland, 102 BBC Two HD Northern Ireland, 103 UTV HD (UTV), 104 Channel 4 HD NI ads, 105 Channel 5 HD, 106 BBC Four HD, 107 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

COM4
SDN
 H -3dB
C40 (626.0MHz)379mDTG-810,000W
Channel icons
20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 38 Channel 5 +1, 41 Legend, 42 GREAT! action, 57 Dave ja vu, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 TRUE CRIME, 68 TRUE CRIME XTRA, 78 TCC, 81 Blaze +1, 83 Together TV, 89 ITV4 +1, 91 WildEarth, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, 267 Al Jazeera English, plus 30 others

COM5
ArqA
 H -3dB
C43 (650.0MHz)379mDTG-810,000W
Channel icons
11 Sky Mix, 17 Really, 19 Dave, 31 E4 Extra, 36 Sky Arts, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 60 Drama +1, 65 That's TV 2, 70 Quest +1, 74 Yesterday +1, 75 That's 90s, 233 Sky News, plus 11 others

COM6
ArqB
 H -3dB
C46 (674.0MHz)379mDTG-810,000W
Channel icons
12 Quest, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 52 GREAT! romance, 56 That's TV (UK), 61 GREAT! movies extra, 63 GREAT! romance mix, 71 That’s 60s, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 235 Al Jazeera Eng, plus 18 others

DTG-8 64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)

The Limavady (Northern Ireland) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: .

If you want to watch these channels, your aerial must point to one of the 80 Full service Freeview transmitters. For more information see the will there ever be more services on the Freeview Light transmitters? page.

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

regional news image
BBC Newsline 0.6m homes 2.5%
from Belfast BT2 8HQ, 1,051km northeast (51°)
to BBC Northern Ireland region - 46 masts.
regional news image
UTV Live 0.6m homes 2.5%
from Belfast BT7 1EB, 1,051km northeast (51°)
to UTV region - 46 masts.

Are there any self-help relays?

Elliotts HillTransposer13 km SE Ballymena, Co. Antrim90 homes (according to B9 Energy)

How will the Limavady (Northern Ireland) transmission frequencies change over time?

1984-971997-981998-20122012-134 Sep 2019
C/D EC/D EC/D EC/D E TB E K T
C40SDN
C41BBCA
C43ArqA
C44D3+4
C46ArqB
C47BBCB
C48_local_local
C49tv_offArqB
C50tv_offBBCA
C54tv_offSDN
C55tv_offBBC1wavesBBC1wavesBBC1wavesBBCB
C58tv_offArqA
C59tv_offITVwavesITVwavesITVwavesD3+4
C62BBC2wavesBBC2wavesBBC2waves
C65C4wavesC4wavesC4waves

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 10 Oct 12 and 24 Oct 12.

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*(-21dB) 800W

Which companies have run the Channel 3 services in the Limavady transmitter area

Oct 1959-May 2006Ulster Television
May 2006-Dec 2014UTV plc
Feb 1983-Dec 1992TV-am•
Jan 1993-Sep 2010GMTV•
Sep 2010-Dec 2014ITV Daybreak•
• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only. Limavady 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
Tuesday, 30 October 2012
B
Brendan Waters
11:47 PM

Hi, thanks for your replys, I have since retuned my tv again and I am now getting every channel but not the Film4 etc mux, is there technical reason why this might be happening, I am using a grid type aerial pointed towards limavady transmitter. Thanks. Brendan

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Brendan Waters's 2 posts IE flag
Wednesday, 31 October 2012
I
Ian Drury
7:28 PM

I live in Donegal, and had perfect reception since last Wednesday, 24th, but since last night BBCB on ch 55 has disapppeared, the HD channels. The rest are perfect. What happened between Monday and Tuesday? (54.90831,-7.67339) 

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Ian Drury's 5 posts GB flag
Dave Lindsay
sentiment_very_satisfiedPlatinum

7:38 PM

Ian Drury: Fanad broadcasts on C55, albeit vertically.

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Dave Lindsay's 5,724 posts GB flag
Thursday, 1 November 2012
I
Ian Drury
9:47 AM

I know, but I was receiving BBCB Mux ch 55 from Limavady perfectly for six days, then nothing, how is that explained? (54.90831,-7.67339) 

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Ian Drury's 5 posts GB flag
Dave Lindsay
sentiment_very_satisfiedPlatinum

11:38 AM

Ian Drury: Digital pictures are an all or nothing sort of thing. There is very little inbetween where they break up a bit. It is said that there is a "cliff edge" over which the picture can't be resolved.
If it is interference, for example from Fanad, then it could have been that, previously, whilst the picture was "perfect", the signal was being interfered with, but not to the degree to push you off the cliff.
What this means is that there is only a "slight" change to the level of degradation required to move from "only just" being good enough (which produces a "perfect" picture) to "only just" being not good enough (which produces no picture).
Such a change could have come about due to a change in the Fanad signal (if that is what is the cause) and this may be something that has moved and is causing a reflection in your direction. Or perhaps there was something that was acting to block or reduce the signal from Fanad that has now moved. Or maybe something has acted to reduce the signal from Limavady.
I mentioned that Fanad is co-channel simply as an observation. If you could receive analogue from Fanad (to some degree, even if not watchable, and particularly so on your Limavady aerial), then this might perhaps add weight to its digital signal being a possible cause of your woes.

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Dave Lindsay's 5,724 posts GB flag
Dave Lindsay
sentiment_very_satisfiedPlatinum

11:57 AM

Ian Drury: Should it prove to be interference from Fanad and you have a grid aerial, such as that shown in this picture, then perhaps a more directional aerial will be better:

Aerials, TV Aerial and Digital Aerial

Grid aerials have a wide acceptance angle and therefore less gain than more directional ones. This is because to get more gain, the aerial simply focuses on a narrower "beam".

Both Holywell Hill and Limavady are on similar bearings and a grid aerial with its wider acceptance angle would therefore be perfect for such an application. However, its wider acceptance angle leaves it open to picking up interference that a more directional antenna would be likely to "reject".

Obviously if the interference is eminating from the direction of the transmitter, then a more directional aerial will still pick it up.

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Dave Lindsay's 5,724 posts GB flag
I
Ian Drury
7:43 PM

I have a Televes Infinity 38 element somewher between a unix and a yagi. All the other muxes come in fine, BBCA is transmitted at the same power, and it's fine, my uhf meter gives the same signal strength for the two, and Fanad has not made any changes since the 24th.
I can see the Letterkenny transmitter out of my side window, 2 miles away, but that's on ch 53, and at 90deg to the aerial, I do get good reception from it, even though it's vertical polarisation. So That's not the culprit. Must be the 256 QAM as opposed to 64, so that's what I'll blame, still doesn't really explain it though.
Aerials and marginal uhf are a black art, I always thought, give me a tricky / weak satellite reception to get any day, way simpler to install.All you need is a big enough dish.
Good job I installed Freesat+HD a few years ago, faultless reception. (54.90831,-7.67339) 

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Ian Drury's 5 posts GB flag
Friday, 2 November 2012
J
Jim Neary
2:38 PM

Ian Drury:

I am having trouble with channel 54 (738.0) on the Limavady transmitter.

I cannot tune in ITV 3 or the rest of the associated stations.

The signal strength usually "maximizes" at about 40 to 50% of total, however, it oscillates between Zero and the aforesaid maximums about 2/3 times every second.

Needless to say this makes it impossible to store any station broadcast on channel 54 (limavady)

can anyone offer an explanation?
is this interference caused by the local transmitter in Moville?
ironically, the channel is received interference free in Derry City.

I am receiving (in Malin Head Co.Donegal) all the other channels (including RTE etc) at a very high signal strength.

any help/information will be appreciated.

Jim

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Jim Neary's 2 posts IE flag
Dave Lindsay
sentiment_very_satisfiedPlatinum

3:09 PM

Jim Neary: The oscillation suggests that it could be too high a signal level. Try turning your amplifier down.

According to RTNL, only Kippure broadcasts on C54:

http://www.rtenl.ie/wp-co….pdf

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Dave Lindsay's 5,724 posts GB flag
Sunday, 4 November 2012
J
John Durrell
12:38 PM
Coleraine

Hi,

Since the switch over I can receive all the HD channels but in 1080i. My neighbour about 150 yards away can receive in 1080P (when channels are being broadcast in 1080P). I live in Ringsend not far from Limavady (10 miles) but I think (not sure) that my signal comes from Divis as we have a mountain in between us and Limavady. I have an I-Can HD set-top box running a Sharp Aquos, I have tried this box at my neighbours it gets 1080P there running through a Sony Bravia . My aerial was a Yagi type high gain. I was getting a signal strength of 65% same as my neighbour. I then tried a Philex 27887D SLx 32 Element Digital Wideband Aerial made no difference except the signal strength was slightly lower at 62%.. Both my neighbour and I use a SLx 8 way distribution box to feed the signal around the house. My question is why can I not receive 1080P? Am I using the wrong aerial? or am I missing a trick somewhere else. Many thanks for any help you can give me.

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John Durrell's 4 posts GB flag
John's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
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