Freeview: Divis (Northern Ireland) Full Freeview transmitter
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Full Freeview on the Divis (Northern Ireland) transmitter

Google StreetviewGoogle mapBing mapGoogle Earth54.607,-6.009 or 54°36'24"N 6°0'34"WBT17 0NG

4G at 800MHz (at800) Freeview reception issues

When 800MHz 4G mobile broadband services start there will be 2 multiplexes in the higher risk range (C21-23, C30, C59-60): C23: SDN, C21: D3+4
See How do I know if the 4G broadband will overload my Freeview? and Full UK map of 4G issue areas for details.

Transmitter faults and engineering works

DIVIS transmitter - Over the next week Divis main transmitter: no analogue TV, TV (digital) working normally, Radio (analogue) Possible weak signal, Radio (digital) Possible weak signal. Digital tick


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The symbol shows the location of the Divis (Northern Ireland) transmitter which serves 440,000 homes.

Other maps:Divis DABDivis AM/FMDivis regionBBC Northern IrelandUTV

Radiation patterns

Radiation patterns withheld

Map key

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.


List by multiplex|List by channel number|List by channel name|See terrain plot

Divis transmitter Freeview broadcasts

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.

MuxAerial positionFrequencyHeightModeWatts
PSB1
BBCA
 horizontal max
C27 (522.0MHz)551m64QAM 8K 2/3
24.1Mb/s DVB-T MPEG2		100,000W
Channel icons
1 BBC One Northern Ireland, 2 BBC Two Northern Ireland, 7 BBC Three, 9 BBC Four, 70 CBBC Channel, 71 CBeebies, 80 BBC News, 81 BBC Parliament, 301 301, plus 14 others

PSB2
D3+4
 horizontal max
C21+ (474.2MHz)551m64QAM 8K 2/3
24.1Mb/s DVB-T MPEG2		100,000W
Channel icons
3 UTV (UTV), 4 Channel 4 NI ads, 5 Channel 5 NI ads, 6 ITV 2, 13 Channel 4+1 NI ads, 14 More 4, 28 E4, 33 UTV+1 (UTV), plus 1 others

PSB3
BBCB
 horizontal max
C24 (498.0MHz)551m256QAM 32KE 2/3
40.2Mb/s DVB-T2 MPEG4		100,000W
Channel icons
101 BBC One HD Northern Ireland, 102 BBC Two HD (England), 103 UTV HD (UTV), 104 Channel 4 HD NI ads, plus 1 others

COM4
SDN
 horizontal -3dB
C23 (490.0MHz)551m64QAM 8K 3/4
27.1Mb/s DVB-T MPEG2		50,000W
Channel icons
10 ITV 3, 20 G.O.L.D. (not free), 25 Dave ja vu, 26 Home (not free), 27 ITV 2 +1, 30 5*, 31 5USA, 34 ESPN UK (not free), 38 Quest, 39 The Zone, 44 Channel 5 +1, 72 CITV, plus 22 others

COM5
ArqA
 horizontal -3dB
C26 (514.0MHz)528m64QAM 8K 3/4
27.1Mb/s DVB-T MPEG2		50,000W
Channel icons
11 PICK TV, 12 Dave, 17 Really, 29 E4+1, 32 Movie Mix, 46 Challenge, 48 Food Network, 82 Sky News, 87 Community Channel, plus 9 others

COM6
ArqB
 horizontal -3dB
C29 (538.0MHz)528m64QAM 8K 3/4
27.1Mb/s DVB-T MPEG2		50,000W
Channel icons
15 Film 4, 18 4Music, 19 Yesterday, 21 VIVA, 24 ITV 4, 41 Sky Sports 1 (not free), 42 Sky Sports 2 (not free), 47 4seven, 83 Al Jazeera English, 85 RT English , plus 21 others



Regional news from the Divis transmitter


BBC Newsline 0.6m homes 2.5%
from Belfast BT2 8HQ, 1,044km northeast
to BBC Northern Ireland region - 46 masts.

UTV Live 0.6m homes 2.5%
from Belfast BT7 1EB, 1,044km northeast
to UTV region - 46 masts.

Self-help relays

Chapel FieldsTransposerCentral Belfast61 homes

How the transmission frequencies change over time

years1950s~851984-971997-981998-20122012-132013-182013-182019-
aerial groupVHFA KA KKA KA KA KA K
C1BBCtv
C21C4C4C4+D3+4+D3+4+D3+4BBCB
C22SDN
C23-ASDNSDNSDN
C24ITVITVITVBBCBBBCBBBCBD3+4
C25ArqA
C26-BArqAArqAArqA
C27BBC2BBC2BBC2BBCABBCABBCABBCA
C28ArqB
C291ArqBArqBArqB
C30local
600C31BBC1BBC1BBC1
C33-2com7
C34+Dcom8
C48C

orange background for multiplexes names moregreen background for transmission frequencieslilac background for power levels in watts800MHz band: 4G mobile to start in 2013700MHz band: possible 4G in 2019 more600MHz band: new or moved digital TV services more
Notes: + and - denote 166kHz offset; aerial group are shown as A B C/D E K W
Italics for analogue, digital switchover was Wednesdays 10th October and 24th October 2012.

  • Ofcom have projected that a local television service for Belfast including Lisburn could use an Interleaved Frequency on the Divis transmitter using C30
  • COM7, COM8 projected for 2013-16.

Comparison of old analogue and current digital signal levels

Analogue 1-4 500kW
com7, com8, BBCA, D3+4, BBCB(-7dB) 100kW
SDN, ARQA, ARQB(-10dB) 50kW
Mux 1*, Mux 2*, Mux A*, Mux B*(-23.4dB) 2.3kW
Mux C*(-24dB) 2kW
Mux D*(-24.9dB) 1.6kW

History of Channel 3 in the Divis transmitter area

Oct 1959-Dec 2014Ulster Television
Feb 1983-Dec 1992TV-am•
Jan 1993-Sep 2010GMTV•
Sep 2010-Dec 2014ITV Daybreak•
• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only. Divis 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.


Your comments: most recent posts are at the bottom

firstFirst comments prevEarlier comments  ◊  Later commentsnext Latest commentslast

Your comments are always welcome. Please use the form below to add your thoughts or questions to this page. We will get back to you as soon as we can.

Jordy
Monday 5 January 2009 11:19PM
Brian - Yes the link is: Planning Applications
Jordy
Tuesday 6 January 2009 11:41AM
Brian - I have formally approached the planning service for a copy when i receive it and should anything else of interest turn up. I will let you know...
Briantist
Tuesday 6 January 2009 11:45AM
Jordy: I presume this is another state secret that can't be posted online!
Jordy
Wednesday 7 January 2009 6:04PM
Brian - I'm going to pick your Brain... What sort of RF issues would cause engineers to build a temporary mast at a site that's getting a new 650ft mast and an existing structure that doesn't need to be worked on cold... I have some ideas but need a second opinion! Cheers.
Briantist
Sunday 11 January 2009 7:42PM
Jordy: Interesting... perhaps they have to decamp some "other equipment (mobile phone, perhaps) to assist with the work schedule.

I guess you have a better idea?
Jordy
Thursday 29 January 2009 11:16PM
This transmitter has currently got serious problems: - Mux A is blank, 2 is blank and Mux C is gone, all the other muxes are teetering around 10 - 20%... All analogue is unwatchable, 1&2 have gone from unwatchable to blank screen... Newcastle 1kw has 3 snowy channels but 4 is blank... I've done two call outs and tested my own setup so i can safely say it's the TX...
ChampionC
Wednesday 18 February 2009 5:24PM
Is the power from Divis being messed around with. I always had OK reception from there to me in Dublin but a few weeks ago, it died significantly. I presumed it was a masthead amp and so disconnected it so I haven't tried it again. Any ideas ?
Jordy
Wednesday 18 February 2009 7:14PM
No the power output from Divis hasn't changed although some work took place in the past few days and the transmitter has been on reduced power... You need a new masthead amp with te variable gain whacked up and combiner unit if you'be got both RTE and BBC channels...
Carlamoore
Monday 18 May 2009 12:00PM
Hi i looked at the map and this is our Tv aeriel mast in Belfast. My husband put up a new aeriel and we cannot seem to get all the channels some are fuzzy and come and go. It is just totally unwatchable with wavy lines all over it. The old aeriel wasn't to bad for the 5 channels the rte was not to bad but it is gone away. Please could anyone tell me what he's done wrong. Thank you
Maurice
Sunday 7 June 2009 2:43AM Lisburn
Hi, I see CNN has left Freeview again it did not stay very long only a few weeks? Anyone using the Divis transmitter got the same problem date 7 June 2009

Maurice from Northern Ireland
Divis transmitter Ulster
Jordy
Sunday 7 June 2009 1:40PM
Hi Maurice - CNN has left freeview... It has been replaced by Supercasino but due to varied gambling laws here in Northern Ireland it cannot be shown so LCN 84 is now blank from the Divis transmitter. We'll have to wait and see what they put on the multiplex, there has been some talk that TG4 will be removed as an analogue channel and moved to the freeview platform and then again there are rumours that a single Freeview HD promo test will be conducted from Divis in the near future...
gary mc donald
Sunday 14 June 2009 9:59AM Newry
Mux C suddenly stop working but comes back randomly up until this week has been working fine any help
Gordon Ferguson
Monday 15 June 2009 1:24PM
Having the exact same problems, the sky channels and dave have all but disappeared Whats going on?
Patrick Lambe
Tuesday 16 June 2009 5:07PM
Hello.
I seem to be having the opposite problems. I'm in Armagh and from Saturday I seem to be only picking up Mux C.
Cant get any BBc or ITv even.
Any suggestions
Jordy
Tuesday 16 June 2009 6:27PM
Muxes A and C has been shot most of today... The weather advisory people are blaming high lift conditions over Northern Ireland, also going home through Dromore earlier i was picking up Highland FM rds from Knockmore/ Eitshal??? I'm afraid we'll have to sit it out for a couple of days. I've stuck a phone call into the duty engineer at Emley Moor so they're aware of the problems...
Mux A is currently breaking up in BT32...
Peter Henderson
Saturday 22 August 2009 10:19PM
What will happen to Northern Visions TV after the switch over ? NVTV is Belfast's community station. It's on channel 62 with an erp of 500 watts, as far as I know, but the transmitter is not on the Divis mast. Will it be on Freeview after switchover ?

Also, when will the power increase occur on Divis ?
Briantist
Sunday 23 August 2009 9:43AM
Peter Henderson: This transmitter is still estimated to be done in March 2013.

Local television will have to migrate to a local multiplex, as Channel M has done in Manchester. This will use an interleaved frequency, see www.ukfree.tv link icon Local digital TV or a 7th multiplex coming soon? | ukfree.tv - independent digital television and switchover advice, since 2002
Peter Henderson
Sunday 30 August 2009 6:32PM
Briantist:

Thanks for the info on NVTV. I assume this is what NEW7 and NEW8 are ? Will TG4 (currently from Divis on low power) use on of these multiplexes as well ?
Briantist
Monday 31 August 2009 5:48PM
Peter Henderson: These frequencies have not yet been sold by Ofcom, so there is no saying which service will end elsewhere. Not sure about TG4, I will find out.
Transmitter engineering
Tuesday 22 September 2009 2:34PM
DIVIS transmitter - Radio 2 Weak Signal - From 1320 [BBC]
Transmitter engineering
Tuesday 22 September 2009 2:34PM
DIVIS transmitter - Radio 2 Weak Signal - From 1320 [BBC]
Transmitter engineering
Tuesday 22 September 2009 3:34PM
DIVIS transmitter - Radio Ulster Weak Signal - From 1448 [BBC]
Transmitter engineering
Tuesday 22 September 2009 3:34PM
DIVIS transmitter - Radio Ulster Weak Signal - From 1448 [BBC]
Transmitter engineering
Friday 25 September 2009 12:34PM
DIVIS transmitter - Radio 4 FM Weak Signal - From 1140 [BBC]
Transmitter engineering
Friday 25 September 2009 12:34PM
DIVIS transmitter - Radio 4 FM Weak Signal - From 1140 [BBC]
Transmitter engineering
Friday 25 September 2009 2:34PM
DIVIS transmitter - Radio 4 FM Weak Signal - 1140-1308 [BBC]
Transmitter engineering
Friday 25 September 2009 2:34PM
DIVIS transmitter - Radio 4 FM Weak Signal - 1140-1308 [BBC]
Mark Simpson
Saturday 10 October 2009 12:43PM Donaghadee
The location of the Divis transmitter on this site is incorrect and the predictions are therefore inaccurate.
Transmitter engineering
Tuesday 10 November 2009 1:09PM
DIVIS transmitter - All FM, R Ulster FM Weak Signal - From 1023 [BBC]
Transmitter engineering
Tuesday 10 November 2009 1:09PM
DIVIS transmitter - All FM, R Ulster FM Weak Signal - From 1023 [BBC]
Transmitter engineering
Wednesday 11 November 2009 8:39AM
DIVIS transmitter - Radio 1 Weak Signal - From 0000 [BBC]
Transmitter engineering
Wednesday 11 November 2009 8:39AM
DIVIS transmitter - Radio 1 Weak Signal - From 0000 [BBC]
Transmitter engineering
Tuesday 24 November 2009 2:34PM
DIVIS transmitter - Radio 1 Weak Signal - From 0000 [BBC] Radio Ulster Weak signal - From 1406 [BBC]
Transmitter engineering
Tuesday 24 November 2009 2:34PM
DIVIS transmitter - Radio 1 Weak Signal - From 0000 [BBC] Radio Ulster Weak signal - From 1406 [BBC]
Transmitter engineering
Tuesday 24 November 2009 3:34PM
DIVIS transmitter - Radio 1 Weak Signal - From 0000 [BBC] Radio Ulster Weak signal - 1406-1453 [BBC]
Transmitter engineering
Tuesday 24 November 2009 3:34PM
DIVIS transmitter - Radio 1 Weak Signal - From 0000 [BBC] Radio Ulster Weak signal - 1406-1453 [BBC]
Jordy
Saturday 28 November 2009 11:13AM
There's a pic of some of the work at Divis this morning... Work seems to be progressing, anchor blocks are in place and the enclosure increased to encompass the perimeter of both masts. The mast itself is is on additional stays to cease vibrations traveling up the mast as they drill into the bedrock. This is stop additional wind loading... s663.photobucket.com link icon DSC02275.jpg picture by AerialServices - Photobucket
Jordy
Saturday 28 November 2009 1:03PM
Just a follow up to a comment made by Peter Henderson some months ago... There is a decision to be taken whether or not to add TG4 Irish Language channel to the Freeview platform. I could understand this move post dso with a regional Interleaved mux but at the minute i don't believe that option is open? Either way Tg4 analogue will probably close in Match/ April if this move to rid negative channel offsets goes ahead. I do not have a clue if this will happen but something needs to happen before Scotland switch's over. I wonder will they level the dbw and remove the -3db offsets, Eitshal and Limavady will kick the crap out each other... If analogue 5 is on the table to be closed down i can't really see a future for this waste of bandwidth. I have nothing against Irish speaking people or their medium's but from a broadcasting point of view it's as useless as a snowflake in hell...
Jordy
Saturday 28 November 2009 1:03PM
Brian - I've a few more pics here but i've lost the bloody usb cable...
Briantist
Monday 30 November 2009 7:10PM
Jordy: That's always very annoying.
Briantist
Monday 30 November 2009 7:12PM
Jordy: Thanks for the pictures. It makes me smile when people ask why digital switchover is taking so long? There is quite a lot of infrastructure to build, and it's always very tricky on live sites.

They could bump E4 from Multiplex PSB2, as they have in Wales for TG4, to give full coverage.
Jordy
Monday 30 November 2009 8:18PM
Brian - What are the COM's going to be broadcast from Divis compared to the PSB's at 100kw? Just wondering why are the COM's frequencies not at the top of the page. The BBC A MUX still has no channel assigned to it. We know it will be channel 27 and the COM's 23,26,29. Perhaps the plan's are not locked down yet?
Briantist
Monday 30 November 2009 9:16PM
Jordy: As far as I know they are still not announced, they are not listed at http://www.ofcom.org.uk/tv/ifi/tech/dsodetails/where they officially live.

That BBC FOI request said they were still International Agreements pending.
industrycynic
Thursday 3 December 2009 6:37PM
Jordy: 50kW. Its already agreed and its on an Ofcom page. If you put in a Belfast postcode on the DUK reception predictor trade view you get all the channels!!
Richard Bell
Sunday 13 December 2009 10:36PM Bangor
Mark - I think all the NI transmitters are in the wrong place due partly to the fact that NI uses the Irish National Mapping Grid, rather than the British Grid used elsewhere in the UK. Not sure when this can be fixed though, as I don't think the site's owner has much time on his hands these days.
Jordy
Monday 14 December 2009 9:43AM
All the VHF has dropped out from Divis... Must be a bit of lift as well Brougher Radio1 is coming in better than usual...
Jordy
Monday 14 December 2009 9:44AM
I'm stupid was probably just the rds...
Briantist
Monday 14 December 2009 5:35PM
Richard Bell: Sorry, yes there is an issue with that and it is on my to-do list. The issue is due to having three co-ords sytems: (lat, long), UK grid and Irish grid.
Transmitter engineering
Thursday 17 December 2009 8:39AM
DIVIS transmitter - Radio 1 Weak Signal - From 0800 [BBC]
Transmitter engineering
Thursday 17 December 2009 8:39AM
DIVIS transmitter - Radio 1 Weak Signal - From 0800 [BBC]
Jordy
Thursday 17 December 2009 11:28AM
Brian - The HRP still looks about spot on... Would the official NGR's be of any help to you?
Transmitter engineering
Monday 11 January 2010 11:09AM
DIVIS transmitter - Radio 1 Weak Signal - From 0000 [BBC] Radio 1 Weak signal - From 0000 [BBC]



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