Freeview: Divis (Northern Ireland) full-Freeview transmitter
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Freeview on the Divis 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 fauls 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
Want to better understand the current TV faults? See the all new UK Free TV page


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The symbol shows the location of the Divis 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.

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. The rating shown takes in account the output power level and the various Freeview transmission modes and do not indicate an ongoing fault.

MuxEffective power level, aerial positionRatingModeWatts
PSB1
BBCA
 horizontal
Maximum64QAM 8K 2/3
24.1Mb/s
DVB-T MPEG2		100,000
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
• as a digital multiplex transmitted on frequency C27 (522.0MHz) from 551m datum.
PSB2
D3+4
 horizontal
Maximum64QAM 8K 2/3
24.1Mb/s
DVB-T MPEG2		100,000
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
• as a digital multiplex transmitted on frequency C21+ (474.2MHz) from 551m datum.
PSB3
BBCB
 horizontal
Maximum256QAM 32KE 2/3
40.2Mb/s
DVB-T2 MPEG4		100,000
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
• as a digital multiplex transmitted on frequency C24 (498.0MHz) from 551m datum.
COM4
SDN
 horizontal
Above average64QAM 8K 3/4
27.1Mb/s
DVB-T MPEG2		50,000
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
• as a digital multiplex transmitted on frequency C23 (490.0MHz) from 551m datum.
COM5
ArqA
 horizontal
Above average64QAM 8K 3/4
27.1Mb/s
DVB-T MPEG2		50,000
Channel icons
 TV News,  TV Stars, 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
• as a digital multiplex transmitted on frequency C26 (514.0MHz) from 528m datum.
COM6
ArqB
 horizontal
Above average64QAM 8K 3/4
27.1Mb/s
DVB-T MPEG2		50,000
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
• as a digital multiplex transmitted on frequency C29 (538.0MHz) from 528m datum.


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-May 2006Ulster Television
May 2006-Dec 2014UTV plc
• 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  ◊ 

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.

Robert
Saturday 23 March 2013 10:42PM
Thanks for the information Eddie and c Reade, also lost all freeview and not a mention on BBC website etc so far.

No point me shinning up my aerial mast tonight then.
Dec
Saturday 23 March 2013 10:43PM
I would say it is - signal still strong on freeview hd box (saorview?) but absolutely no signal for all others...
Peter Henderson
Saturday 23 March 2013 10:49PM
Freeview from Divis is currently down and off air (obviously weather related) and nothing whatsoever to do with "lost all Freeview channels). Black Mountain was apparently off air yesterday.

Carnmoney Hill also down. Strangely, the NI Mux from both Black Mountain and Carnmoney are still running.

Thank goodness for satellite.

Hopefully "engineering" are aware of the problem i.e. no terrestrial TV throughout much of NI.
Peter Henderson
Saturday 23 March 2013 10:53PM
Surely there should be back up generators at Divis ??????
C Reade
Saturday 23 March 2013 10:53PM
Would guess its an antenna problem at Divis. Could be off quite a while. Wouldnt like to be climbing that thing this time of night!
Tony Mc
Saturday 23 March 2013 11:02PM
@Eddie and C Reade. I'm in west Belfast just under the Divis mountain, all my channels are out from 10 o'clock also... Hope this can be sorted ASAP... Seems the weather is in a foul mood..... Any updates on when this will be fixed?.
Eddie
Saturday 23 March 2013 11:05PM Belfast
Found this - seems to give more info than I had initially found. Might help you in future ...

https://www.radioandtvhelp.co.uk/diagnostic/fault-checker/
norman henderson
Saturday 23 March 2013 11:16PM Carrickfergus
I have lost all channels and I am not receiving any picture I also have BT freeview. I am receiving RTE channels
Tony Mc
Saturday 23 March 2013 11:17PM
Thanks for that Eddie... Seems theres nothing we can do but wait.. The weather's already effected the electricity and theres also a problem with emergency services taking 999 calls , the calls are being diverted to Scotland for some reason... So much for spring weather eh?
Peter Henderson
Saturday 23 March 2013 11:48PM
All back on air again
Eddie
Saturday 23 March 2013 11:51PM Belfast
Cheers for that Peter
Dave
Sunday 24 March 2013 12:09AM
None of the COM4 channels are working for me everything else is back to normal.
P. Kieran Ward
Sunday 24 March 2013 12:30AM Belfast
Hi all! Here is one way to get over 'No Signal' problems is the way my daughter used when Divis was off. We were watching Law and Order on Channel 5 and when Divis went down was to watch the remainder of the show via the internet. It looks like some of the muxs are still off air at 12.30am Sunday.
Transmitter engineering
Sunday 24 March 2013 4:32AM
DIVIS transmitter - Freeview: BBC Digital TV Off Air from 21:56 yesterday to 23:21 yesterday, BBC Digital TV Reduced Quality from 00:51 on 22 Mar to 01:13 on 22 Mar, BBC Digital TV Reduced Quality from 02:30 on 22 Mar to 03:59 on 22 Mar, HD Digital TV Off Air from 21:56 yest [BBC]
Transmitter engineering
Sunday 24 March 2013 4:31PM
DIVIS transmitter - Freeview: BBC Digital TV Off Air from 21:56 yesterday to 23:21 yesterday, BBC Digital TV Reduced Quality from 02:30 on 22 Mar to 03:59 on 22 Mar, BBC Digital TV Reduced Quality from 00:51 on 22 Mar to 01:13 on 22 Mar, HD Digital TV Off Air from 21:56 yest [BBC]
Peter Henderson
Sunday 24 March 2013 5:07PM
Another good reason to have Freesat as a back up, even if you have good terrestrial reception.

I well remember the major fault at Divis in the late 70's (or was it the early 80's ?) when we had no TV for almost a week. The transmitter was subsequently on low power4 for several months afterwards.

Satellite or cable didn't exist in those days, so it was all very frustrating!
Transmitter engineering
Monday 25 March 2013 4:32AM
DIVIS transmitter - Freeview: BBC Digital TV Off Air from 21:56 on 23 Mar to 23:21 on 23 Mar, BBC Digital TV Reduced Quality from 00:51 on 22 Mar to 01:13 on 22 Mar, BBC Digital TV Reduced Quality from 02:30 on 22 Mar to 03:59 on 22 Mar, HD Digital TV Off Air from 21:56 on 2 [BBC]
Transmitter engineering
Monday 25 March 2013 7:32AM
DIVIS transmitter - Freeview: BBC Digital TV Off Air from 21:56 on 23 Mar to 23:21 on 23 Mar, BBC Digital TV Reduced Quality from 02:30 on 22 Mar to 03:59 on 22 Mar, BBC Digital TV Reduced Quality from 00:51 on 22 Mar to 01:13 on 22 Mar, HD Digital TV Off Air from 21:56 on 2 [BBC]
Transmitter engineering
Tuesday 26 March 2013 10:32AM
DIVIS transmitter - Freeview: BBC Digital TV Reduced Quality from 02:30 on 22 Mar to 03:59 on 22 Mar, BBC Digital TV Reduced Quality from 00:51 on 22 Mar to 01:13 on 22 Mar, BBC Digital TV Off Air from 21:56 on 23 Mar to 23:21 on 23 Mar, HD Digital TV Reduced Quality from 02 [BBC]
Transmitter engineering
Wednesday 27 March 2013 4:32AM
DIVIS transmitter - Freeview: BBC Digital TV Off Air from 21:56 on 23 Mar to 23:21 on 23 Mar, HD Digital TV Off Air from 21:56 on 23 Mar to 23:21 on 23 Mar. DAB: BBC National DAB Radio Off Air from 19:30 on 22 Mar to 12:16 on 25 Mar. FM: Radio 1 FM Weak Signal from 19:30 on [BBC]
Transmitter engineering
Thursday 28 March 2013 10:31AM
DIVIS transmitter - DAB: BBC National DAB Radio Off Air from 19:30 on 22 Mar to 12:16 on 25 Mar. FM: Radio 1 FM Weak Signal from 19:30 on 22 Mar to 12:00 on 25 Mar, Radio 1 FM Weak Signal from 19:59 yesterday to 22:07 yesterday, Radio 2 FM Weak Signal from 19:30 on 22 Mar to [BBC]
Transmitter engineering
Friday 29 March 2013 4:32AM
DIVIS transmitter - DAB: BBC National DAB Radio Off Air from 19:30 on 22 Mar to 12:16 on 25 Mar. FM: Radio 1 FM Weak Signal from 19:30 on 22 Mar to 12:00 on 25 Mar, Radio 1 FM Weak Signal from 19:59 on 27 Mar to 22:07 on 27 Mar, Radio 2 FM Weak Signal from 19:30 on 22 Mar to [BBC]
P. Kieran Ward
Friday 29 March 2013 11:53PM
Has anyone heard what is causing the problem with the Divis Transmitter?
Michael
Saturday 30 March 2013 12:30AM
P. Kieran Ward: What problem?
P. Kieran Ward
Sunday 31 March 2013 12:32AM
Michael

If you read the previous posts re: Transmitter engineering on Divis. It would appear that it is now effecting radio transmissions while earlier it was some TV. I was just wondering if it was due to additional engineering for changes later this year - i.e. Northern Visions etc.

Regards

Kieran
Peter Henderson
Tuesday 2 April 2013 2:25AM
The DAB problem could be due to the fact that Digital One will be broadcasting from Divis in a few months time.

I think FM transmissions are still from the old mast.
Gary
Tuesday 30 April 2013 11:24PM Donaghadee
Whats happening, lost signal to film4, did a suggested re-tune, now instead of 144 channels i have only 66.
is there transmitter maintenance going on, this has been playing for the past week or so? has this something to do with 4G masts problem from 2013 - 2017, thats along time to have to put up with poor signals.
roof top vertical mast.
oh further a further re-tune have given me 103 channels, oh another re-tune has given me 144 channels again.
i thought the digital switchover was to sort out these old issues.
wayne cochrane
Thursday 2 May 2013 11:05AM
Donaghadee seems to be in a good reception area for the Divis main transmitter, but could be prone to interference from Caldbeck in NW England.

I don't think they've done any 800 MHz 4G tests in NI yet.

Might be no harm to get your aerial system checked out.
Transmitter engineering
Monday 20 May 2013 10:31AM
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. [DUK]
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