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Full Freeview on the Divis (Northern Ireland) transmitter

first published this on - UK Free TV
sa_streetviewGoogle Streetviewsa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps54.607,-6.009 or 54°36'24"N 6°0'34"Wsa_postcodeBT17 0NG

 

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.

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

Divis transmitter - Divis 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
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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-100,000W
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
C21+ (474.2MHz)551mDTG-100,000W
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
C24 (498.0MHz)551mDTG-100,000W
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
C23 (490.0MHz)551mDTG-850,000W
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
C26 (514.0MHz)528mDTG-850,000W
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
C30 (546.0MHz)528mDTG-850,000W
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

LBT
 H -13dB
C36 (594.0MHz)528mDTG-125,000W
Channel icons
from 29th September 2014: 7 NvTv,

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

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, 16 September 2011
J
Jo
2:42 PM
Ballyclare

I was receiving channels 4,5 ITV2 etc fine until the last few weeks. Now I am lucky to get them once a week. I have checked with friends in the same area and they are having the same problems. Is anything going to be done to resolve this?

link to this comment
Jo's 1 post GB flag
Jo's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
Friday, 7 October 2011
J
Jordy
sentiment_satisfiedGold

7:29 PM

There we go then - Ulster Dso dates finalised. Oct 10th finishing Oct 17th. All 3 main and all relays go at the same time.

link to this comment
Jordy's 1,827 posts GB flag
Sunday, 9 October 2011
J
John Breen - Switch2Digital
3:02 PM

Interesting does the RTE mux broadcast at the same time as Divis switches over?

Can anyone answer why they have suddenly dropped metnioning Duvis as broadcasting this mux does that mean it won't?

The new antenna mast at Divis appears to have a larger aerial underneath to top television aerial. Just curious to what this is for?


link to this comment
John Breen - Switch2Digital's 1 post GB flag
P
Peter Henderson
sentiment_satisfiedSilver

8:11 PM

Jordy: Do you have a link to that information ?

John: Was wondering the same thing myself re. the RTE mini mux.

I had been led to believe it would broadcast from Divis (the old mast would be apparently retained for this purpose), Brougher, Carnmoney Hill, and Black Mountain (presumably the low power relay for West Belfast).

Recent press releases have, as you say, dropped Divis so is Black Mountain going to use a higher power ? 5 watts is hardly going to cover all of greater Belfast.

link to this comment
Peter Henderson's 240 posts GB flag
Wednesday, 12 October 2011
M
Mike Dimmick
sentiment_very_satisfiedPlatinum

2:24 PM

Peter Henderson: Digital UK did publish a brochure stating 10th and 24th October 2012 on their website, but the site was reverted to an older version. There could still be an announcement in the next week or so, much longer and it's probably further delayed.

Black Mountain is the old IBA VHF TV mast - Divis was the BBC mast - and has plenty of aperture for a high-power antenna. Channel 5 analogue transmits at 50 kW, apparently from a skew-fire array at the top of the 228 metre mast. A cantilever could perhaps be added if required, or RT could take over the C5 array, depending on how flexible it is and whether it might be needed for MUX 7, 8, 9.

It may be that the new Divis mast wasn't designed to take the weight of the RT mux antenna in addition to everything else, assuming that for whatever reason the PSB or COM main antennas can't be used.

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Mike Dimmick's 2,486 posts GB flag
N
norman wright
3:18 PM

Can you possibly let me know if or when it might be possible to receive RTE digital transmissions from the Devis Mountain transmitter.

Norman wright 12/10/11

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norman wright's 1 post GB flag
Thursday, 13 October 2011
Briantist
sentiment_very_satisfiedOwner

9:39 AM

Jordy: I have put the new provisional dates up, but, as per my agreement with Digital UK, they show as "to be confirmed".

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Briantist's 38,915 posts GB flag
S
Souriau
6:17 PM
Newry

IS the DSO date incorrect above,
17th October 2011?
Is it not October 2012?


link to this comment
Souriau's 3 posts GB flag
Souriau's: mapS's Freeview map terrainS's terrain plot wavesS's frequency data S's Freeview Detailed Coverage
Briantist
sentiment_very_satisfiedOwner

7:10 PM

Souriau: Just testing... Thanks for pointing that out.

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Briantist's 38,915 posts GB flag
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