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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 MAX, 209 Ketchup TV, 210 Ketchup Too, 211 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 8 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, 88 Classic Hits, 235 Aljazeera English, plus 19 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
Saturday, 15 October 2011
J
Jordy
sentiment_satisfiedGold

5:13 PM

Peter as i said before they haven't dropped Divis from inclusion in the RTE mini mux scheme, Black Mountain & Divis are being treated as co-sited, they're a mile away and 5 degrees apart. Reason probably being they will run a single channel from both and use the current main array for the mux then adopt the channel 5 array at Black Mountain to fill in the gap below Divis. Makes sense that 5 watts is the mentioned ERP.

Begs two questions the DTG won't answer is does channel 5 analogue come off the air before switchover and will the RTE mux be on air come stage2 dso.

link to this comment
Jordy's 1,827 posts GB
Monday, 17 October 2011
Transmitter engineering
sentiment_very_satisfiedOwner

10:41 AM

DIVIS transmitter - Over the next week Divis main transmitter: TV (analogue) Possible weak signal, TV (digital) working normally, Radio (analogue) Possible weak signal, Radio (digital) working normally. [DUK]

link to this comment
Transmitter engineering's 138,029 posts xx
Transmitter engineering
sentiment_very_satisfiedOwner

10:41 AM

DIVIS transmitter - Over the next week Divis main transmitter: TV (analogue) Possible weak signal, TV (digital) working normally, Radio (analogue) Possible weak signal, Radio (digital) working normally. [DUK]

link to this comment
Transmitter engineering's 138,029 posts xx
Briantist
sentiment_very_satisfiedOwner

8:31 PM

Jordy: In all existing switchovers, Channel 5 on analogue has closed at DSO2, when the channel becomes available to all on D3+4.

link to this comment
Briantist's 38,844 posts GB
Tuesday, 18 October 2011
Transmitter engineering
sentiment_very_satisfiedOwner

9:42 AM

DIVIS transmitter - is Transmitter works 18 October 2011: Engineering transmitter work will take place between 08:30hrs and 18:00hrs. TV services that will be disrupted: Analogue services - BBC1, BBC2, ITV and Channel 4 will be subject to periods of shutdown. Digital services - n/a [DUK] Over the next week Divis main transmitter: TV (analogue) Possible weak signal, TV (digital) working normally, Radio (analogue) Possible weak signal, Radio (digital) working normally. [DUK]

link to this comment
Transmitter engineering's 138,029 posts xx
Transmitter engineering
sentiment_very_satisfiedOwner

9:42 AM

DIVIS transmitter - is Transmitter works 18 October 2011: Engineering transmitter work will take place between 08:30hrs and 18:00hrs. TV services that will be disrupted: Analogue services - BBC1, BBC2, ITV and Channel 4 will be subject to periods of shutdown. Digital services - n/a [DUK] Over the next week Divis main transmitter: TV (analogue) Possible weak signal, TV (digital) working normally, Radio (analogue) Possible weak signal, Radio (digital) working normally. [DUK]

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Transmitter engineering's 138,029 posts xx
M
Mike Dimmick
sentiment_very_satisfiedPlatinum

5:52 PM

Briantist: Chelmsford C5 is a bit of an exception as it belonged more to the London region than to Sudbury, but it went off at Sudbury DSO 2. Still, it *was* an exception.

According to the last timetable published by Ofcom, Channel 5 analogue must switch off by 31 December 2012, but it also still says that for the UTV region as a whole.

I think it's unlikely that analogue C5 from Black Mountain would be switched off before the DSO date.

link to this comment
Mike Dimmick's 2,486 posts GB
Thursday, 20 October 2011
Briantist
sentiment_very_satisfiedOwner

7:34 AM

Mike Dimmick: True, that was an exception in the strictest sense.

I think that the "31 December 2012" date is there for legal purposes, I don't know if Ofcom will go to the trouble of changing the documentation now to reflect the correct date.

Yes, I agree, Black Mountain will continue with analogue C5 until DSO2 in Northern Ireland so the channel can provide a contiguous service for the viewers.

link to this comment
Briantist's 38,844 posts GB
Transmitter engineering
sentiment_very_satisfiedOwner

10:42 AM

DIVIS transmitter - is Transmitter works 20 and 21 October 2011: Engineering transmitter work will take place between 08:30hrs and 18:00hrs. TV services that will be disrupted: Analogue services - BBC1, BBC2, ITV and Channel 4 will be subject to periods of shutdown. Digital services - n/a [DUK] Over the next week Divis main transmitter: TV (analogue) Possible weak signal, TV (digital) working normally, Radio (analogue) Possible weak signal, Radio (digital) working normally. [DUK]

link to this comment
Transmitter engineering's 138,029 posts xx
Transmitter engineering
sentiment_very_satisfiedOwner

10:42 AM

DIVIS transmitter - is Transmitter works 20 and 21 October 2011: Engineering transmitter work will take place between 08:30hrs and 18:00hrs. TV services that will be disrupted: Analogue services - BBC1, BBC2, ITV and Channel 4 will be subject to periods of shutdown. Digital services - n/a [DUK] Over the next week Divis main transmitter: TV (analogue) Possible weak signal, TV (digital) working normally, Radio (analogue) Possible weak signal, Radio (digital) working normally. [DUK]

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Transmitter engineering's 138,029 posts xx
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