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Full Freeview on the Divis (Northern Ireland) transmitter

first published this on - UK Free TV
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The symbol shows the location of the Divis (Northern Ireland) transmitter which serves 440,000 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 Divis (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 Divis 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
C27 (522.0MHz)551mDTG-3100,000W
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
 H max
C21+ (474.2MHz)551mDTG-3100,000W
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
 H max
C24 (498.0MHz)551mDTG-6100,000W
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

COM4
SDN
 H -3dB
C23 (490.0MHz)551mDTG-850,000W
Channel icons
12 Quest, 20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 41 Legend, 42 GREAT! movies action, 46 Channel 5 +1, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 CBS Reality, 74 Dave ja vu, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 203 CITV, 208 Pop Player, 211 Ketchup TV, 212 YAAAS!, plus 15 others

COM5
ArqA
 H -3dB
C26 (514.0MHz)528mDTG-850,000W
Channel icons
11 Sky Arts, 17 Really, 19 Dave, 31 E4 Extra, 36 pick, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 57 Smithsonian Channel, 60 Drama +1, 70 Quest +1, 75 Yesterday +1, 83 Together TV, 233 Sky News, plus 9 others

COM6
ArqB
 H -3dB
C30 (546.0MHz)528mDTG-850,000W
Channel icons
 FreeSports, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 71 Quest Red +1, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 91 Classic Hits, 235 Aljazeera English, plus 18 others

LBT
 H -13dB
C30 (546.0MHz)528mDTG-125,000W
Channel icons
from 29th September 2014: 7 NvTv,

com7
 H -9.1dB
C55 (746.0MHz)551mDTG-612,400W
Channel icons


NIMM
 H -40dB
C48 (690.0MHz)551mDTG-10W
Channel icons
from 4th September 2019: 53 TG4, 54 RTÉ One, 55 RTÉ Two,

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
DTG-12 QSPK 8K 3/4 8.0Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)

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

regional news image
BBC Newsline 0.6m homes 2.5%
from Belfast BT2 8HQ, 1,044km northeast (51°)
to BBC Northern Ireland region - 46 masts.
regional news image
UTV Live 0.6m homes 2.5%
from Belfast BT7 1EB, 1,044km northeast (51°)
to UTV region - 46 masts.

Are there any self-help relays?

Chapel FieldsTransposerCentral Belfast61 homes

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

1950s-80s1984-971997-981998-20122012-134 Mar 2020
VHFA K TA K TA K TK TW T
C1BBCtvwaves
C21C4wavesC4wavesC4waves+D3+4D3+4
C23SDNSDN
C24ITVwavesITVwavesITVwavesBBCBBBCB
C26ArqAArqA
C27BBC2wavesBBC2wavesBBC2wavesBBCABBCA
C29ArqB
C30LBT
C31BBC1wavesBBC1wavesBBC1waves
C33com7
C34com8
C36_local
C48NIMMNIMM
C55tv_offcom7tv_off
C56tv_offCOM8tv_off

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 500kW
BBCA, D3+4, BBCB(-7dB) 100kW
SDN, ARQA, ARQB(-10dB) 50kW
com8(-16dB) 12.7kW
com7(-16.1dB) 12.4kW
LBT(-20dB) 5kW
Mux 1*, Mux 2*, Mux A*, Mux B*(-23.4dB) 2.3kW
Mux C*(-24dB) 2kW
Mux D*(-24.9dB) 1.6kW
NIMM(-47dB) 10W

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

Comments
Friday, 5 August 2011
M
Mike Dimmick
sentiment_very_satisfiedPlatinum

4:53 PM

Peter Henderson: We simply don't know yet. Typically the dates are announced with about a year to go. For example, London (4 April 2012) was announced on 7 April 2011, Meridian West (lead transmitter Hannington: 8 Feb 2012) on 15 Feb 2011, and Meridian East (lead Heathfield, 30 May 2012) on 10 May 2011. The later the announcement comes, the later the switchover is likely to be. I think the shortest period between announcement and switchover was for the Channel Islands, about 10 months in advance.

Every region that Ulster TV borders has already switched over, so I don't really see any reason why it can't all happen on the same day. The Sutton Coldfield/Emley Moor switchover next month affects many more relay transmitters and people than all of the Ulster region. Fenton switches on the same dates so that's three 'Full Freeview' transmitters on the same date. The most is five main transmitters with some work to do on the same day - Oxford DSO2, Mendip, Bromsgrove, Lark Stoke and The Wrekin retune and power up all on 28 September, Nottingham and Sheffield have a retune and power up scheduled for the day before.

Some co-ordination may still be required with the Republic, I'm not sure if they've started up Saorview on final channels or not. Because of the pull-out of the commercial provider, they seem to have only launched two multiplexes so far, and one of them just contains placeholder content according to Wikipedia, so they may not have as tight frequency requirements as we do, right now.

Looking at the Geneva 2006 frequency plan, it appears Ireland asked for 4 frequencies at each major site, in addition to their existing analogue frequencies, so the co-ordination may already have been done. (They still use Band III VHF for RTE1 and 2 at many sites, so only six UHF frequencies total are required at those sites, before analogue switch-off.).

link to this comment
Mike Dimmick's 2,486 posts GB
Monday, 8 August 2011
Briantist
sentiment_very_satisfiedOwner

8:50 AM

Peter Henderson: The original Arqiva plan I saw had Northern Ireland doing switchover in three batches, but they may decide that it is easier to do the whole area in one go.

link to this comment
Briantist's 38,844 posts GB
Saturday, 13 August 2011
J
John Francis
9:21 PM

Does this mean that in NI we'll get all of the UK content plus RTE content or a reduced UK content plus RTE (or something else)?

link to this comment
John Francis's 1 post GB
Sunday, 14 August 2011
P
Peter Henderson
sentiment_satisfiedBronze

12:05 AM
Newtownabbey

I see you've brought forward the approximate date to December next year Brian. Have you heard something ?

John: as far as I'm aware, the mini RTE Mux is in addition to Freevuew. Channel 30 had been mooted for this, but it now seems as if it's going to be used for local TV, which I assume will be NVTV as it's already broadcasting.

I've read that channel 48 may be used for an additional Mux at Divis

link to this comment
Peter Henderson's 25 posts GB
Briantist
sentiment_very_satisfiedOwner

12:36 PM

Peter Henderson: All the official documentation says the whole UK switchover is complete by the end of 2012, so I have adjusted the projected dates to reflect that.

Don't make any assumptions about who, if anyone, will get the Channel 6 local TV allocation. This is all out for consultation at the moment.

As for the services, the official position is Lords Hansard text for 12 Jan 201112 Jan 2011 (pt 0001) :

"Radio Telefis Eireann (RTE) broadcasts are currently available to some homes in Northern Ireland by virtue of overspill signals from transmitters located in the Republic of Ireland. Consequently, there have been no costs to the UK Government.

As set out in my Written Statement to the House on 20 December, the UK and Irish Government have agreed that the most effective way to provide for the continuing provision of TG4 in Northern Ireland following the digital switchover is to build a new, low-power TV multiplex in Northern Ireland. This multiplex will also carry RTE 1 and RTE 2.

Work on the cost elements of the new multiplex is continuing. The costs of broadcasting RTE 1 and RTE 2 will be met by the relevant Irish authority on a pro rata basis, according to the proportion of the new multiplex used. The other costs will be met by the UK."

link to this comment
Briantist's 38,844 posts GB
Monday, 15 August 2011
Briantist
sentiment_very_satisfiedOwner

9:10 AM

John Francis: The proposal is that if you have a Freeview HD box you will get the RoI services in addition to the UK ones.

link to this comment
Briantist's 38,844 posts GB
P
Peter Henderson
sentiment_satisfiedSilver

10:35 AM

"Don't make any assumptions about who, if anyone, will get the Channel 6 local TV allocation. This is all out for consultation at the moment."

If NVTV don't get it Brian, does this mean they'll be forced to close down post DSO ?

I can't imagine Ofcom allowing them to continue on analogue.


link to this comment
Peter Henderson's 240 posts GB
Briantist
sentiment_very_satisfiedOwner

12:43 PM

Peter Henderson: Yes, that is correct. There is no provision for the automatic roll over of the existing local TV licences to the digital service.

link to this comment
Briantist's 38,844 posts GB
Wednesday, 31 August 2011
R
Richard
9:31 PM

I live in Lisburn and have had interference and lost channels on mux 2 and mux d for 2 days now.

Nothing has changed in the house or local area that we know of. Next door has lost channels too. Any ideas???

link to this comment
Richard's 1 post GB
Tuesday, 6 September 2011
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