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Freeview Light on the Londonderry (Northern Ireland) transmitter

first published this on - UK Free TV
sa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps55.003,-7.370 or 55°0'11"N 7°22'11"Wsa_postcodeBT48 0JS

 

The symbol shows the location of the Londonderry (Northern Ireland) transmitter which serves 37,000 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 Londonderry (Northern Ireland) 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 Londonderry 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
 V max
C29 (538.0MHz)286mDTG-32,000W
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, 250 BBC Red Button, plus 13 others

PSB2
D3+4
 V max
C31 (554.0MHz)286mDTG-32,000W
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, 30 E4 +1, 35 UTV +1 (UTV),

PSB3
BBCB
 V max
C37 (602.0MHz)286mDTG-62,000W
Channel icons
56 5SELECT, 101 BBC One HD Northern Ireland, 102 BBC Two HD (England), 103 UTV HD (UTV), 104 Channel 4 HD NI ads, 105 Channel 5 HD, 106 BBC Four HD, 109 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 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
H/V: aerial position (horizontal or vertical)

Are you trying to watch these 43 Freeview channels?

the effected channels
the effected channels
the effected channels
the effected channels

The Londonderry (Northern Ireland) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: 4seven, 5Action, 5STAR, 5USA, Aljazeera English, Blaze, Blaze +1, CBS Reality, Challenge, Channel 5 +1, CITV, YAAAS!, Dave, Dave ja vu, DMAX, Drama +1, E4 Extra, Film4 +1, Food Network, GB News, GREAT! movies, GREAT! movies action, HGTV, HobbyMaker, ITV2 +1, ITV3 +1, ITV4 +1, ITVBe +1, Legend, PBS America, pick, POP MAX, Quest +1, Quest Red, Really, Sky News, Smithsonian Channel, Talking Pictures TV, TCC, That's TV (UK), Together TV, W, Yesterday +1.

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 Londonderry transmitter?

regional news image
BBC Newsline 0.6m homes 2.5%
from Belfast BT2 8HQ, 1,052km northeast (50°)
to BBC Northern Ireland region - 46 masts.
regional news image
UTV Live 0.6m homes 2.5%
from Belfast BT7 1EB, 1,052km northeast (50°)
to UTV region - 46 masts.

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

1950s-80s1984-971997-981998-20122012-134 Sep 2019
VHFB E TW TW TB E TW T
C2BBCtvwaves
C29BBCA
C31C5wavesC5wavesD3+4
C37BBCB
C41ITVwavesITVwavesITVwavesD3+4
C44BBC2wavesBBC2wavesBBC2wavesBBCA
C47C4wavesC4wavesC4wavesBBCB
C51tv_offBBC1wavesBBC1wavesBBC1waves_local_local

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 5 10kW
Analogue 1-4(-4.9dB) 3.2kW
BBCA, D3+4, BBCB(-7dB) 2kW

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. Londonderry 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, 9 July 2011
Transmitter engineering
sentiment_very_satisfiedOwner

1:36 PM

LONDONDERRY transmitter - Analogue BBC ONE Weak Signal from 10:41 on 07 Jul to 10:54 on 07 Jul BBC ONE Weak Signal from 07:11 on 07 Jul to 07:16 on 07 Jul [BBC]

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Transmitter engineering's 138,029 posts xx
Friday, 21 October 2011
Transmitter engineering
sentiment_very_satisfiedOwner

9:51 AM

LONDONDERRY transmitter - Analogue BBC ONE Off Air from 07:40 today BBC TWO Off Air from 07:40 today [BBC]

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Transmitter engineering's 138,029 posts xx
Transmitter engineering
sentiment_very_satisfiedOwner

11:41 AM

LONDONDERRY transmitter - Analogue BBC ONE Off Air from 07:40 today to 09:05 today BBC TWO Weak Signal from 09:16 today BBC TWO Off Air from 07:40 today to 09:05 today [BBC]

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Transmitter engineering's 138,029 posts xx
Transmitter engineering
sentiment_very_satisfiedOwner

2:44 PM

LONDONDERRY transmitter - Analogue BBC ONE Off Air from 07:40 today to 09:05 today BBC TWO Weak Signal from 09:16 today to 11:48 today BBC TWO Off Air from 07:40 today to 09:05 today [BBC]

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Transmitter engineering's 138,029 posts xx
Monday, 24 October 2011
Transmitter engineering
sentiment_very_satisfiedOwner

12:03 PM

LONDONDERRY transmitter - Analogue BBC ONE Off Air from 07:40 on 21 Oct to 09:05 on 21 Oct BBC TWO Weak Signal from 09:16 on 21 Oct to 11:48 on 21 Oct BBC TWO Off Air from 07:40 on 21 Oct to 09:05 on 21 Oct [BBC]

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Transmitter engineering's 138,029 posts xx
Tuesday, 25 October 2011
Transmitter engineering
sentiment_very_satisfiedOwner

12:49 PM

LONDONDERRY transmitter - Analogue BBC ONE Off Air from 07:40 on 21 Oct to 09:05 on 21 Oct BBC TWO Off Air from 07:40 on 21 Oct to 09:05 on 21 Oct BBC TWO Weak Signal from 09:16 on 21 Oct to 11:48 on 21 Oct [BBC]

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Transmitter engineering's 138,029 posts xx
Thursday, 17 November 2011
J
john marlow
11:34 PM
Londonderry

when will freeview be available from the londonderry tranmitter

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john marlow's 1 post GB
Friday, 18 November 2011
M
Mark Fletcher
sentiment_satisfiedGold

12:29 AM
Halifax

John Marlow,Londonderry/Derry.In the early hours of Wednesday 10 October 2012,a little after the BBC2 analogue signal is switched off on fr 44,DSO1 will begin.The new higher power BBCA mux on 2kw from the Londonderry/Derry relay will commence broadcasting also on fr 44 around 00:00am (midnight) 01:00am.Two weeks after in the early hours of Wednesday 24 October 2012 the remaining four analogue stations BBC1,UTV,Channel 4,Channel 5 will be forever switched off and replaced by two further new multiplexes D3+4 on fr 41 and BBCB (HD) on fr 47.If your existing (vertically polarised) aerial whether it's a group W wideband,or either group E or group B type gives you stable reception there is no need to change it.Bearing in mind you will not be able to receive SDN,ArqA & ArqB mux's on Londonderry/Derry mast as it will only carry the PSB multiplexes only.If you want the COM mux's if reception allows you,you will however have to realign your aerial to face the main Limavady transmitter polarised horizontally,possibly you may have to upgrade yer aerial if you point it to Limavady itself,a group W wideband X-beam XB22WB antenna or a superior quality group E Yagi 18E antenna using satellite grade black or brown coloured co-ax cable,and importantly fitted with a brass co-ax plug,will give you not only the full package from Limavady itself but also much improved reception from this transmitter itself 20kw powered PSB mux's and 10kw powered COM mux's,compared to 2kw PSB (no COM) mux's from the Londonderry/Derry relay.

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Mark Fletcher's 673 posts GB
Wednesday, 18 April 2012
D
Dermy
10:28 AM
Londonderry

Sorry to be repetetive and I am not technically minded at all, but am I to understand that there is no UK freeview reception in Derry from the Sheriff's mountain transmitter UNTIL October 2012. At the moment we can get Saorview with RTE etc, but not the UK stations on freeview. I had heard that this would be switched on in April 2012 ahead of the full switchover in October. However, from reading these posts it seems that nothing 'new' will happen until October 2012. Can someone please confirm that this is correct?

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Dermy's 1 post GB
Dave Lindsay
sentiment_very_satisfiedPlatinum

11:09 AM

Dermy: You are correct that the Derry transmitter on Sheriff's mountain will not broadcast Freeview until switchover in October. You should also be aware that it will only be a "Freeview Lite" transmitter as it won't carry the Commercial services; it will be for Public Service Broadcasters (PSBs) only. The PSBs being BBC, UTV, ITV2, Channel 4, E4, More 4, Channel 5 and the four HD services.
However, on looking at your road using Google Streetview I can't see any aerials on the Sheriff Mountain transmitter. Most houses have two aerials; one on Limavady and one on Holywell Hill. The former is a main UK station that carries low power Freeview now and at switchover will carry the full range of channels. The latter carries the Republic's services.
Whilst Holywell Hill and Sheriff Mountain transmitters are probably in the same direction from your location, the former broadcasts horizontally polarised signals and the latter vertically polarised ones. So for Holywell aerials will be horizontal (elements flat) as they are and this is the same as for Limavady. Sheriff Mountain aerials are vertical (elements up/down).
Try connecting a Freeview receiver to your Limavady aerial. It "may" be sufficient to receive some or all or the low power services.
Come October, you will still have to rely on Holywell for RT as Limavady won't transmit it.

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Dave Lindsay's 5,724 posts GB
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