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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.

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
Thursday, 24 September 2020
J
john cunningham
3:52 AM

Will camlough mountain transmitter ever broadcast bbc4 in HD as I am unable to pick it up from divis

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john cunningham's 1 post GB flag
C
Chris.SE
sentiment_very_satisfiedPlatinum

4:10 AM

john cunningham:

The short answer is no. Until such time as the current SD multiplexes are converted to T2 (HD) transmission - not likely in the foreseeable future due to the economic climate - then there is no space available. On 25 main UK transmitters it is currently broadcast on COM7 which is a temporary multiplex which is due to close by June 2022 at the latest. We live in hopes (some say cloud cuckoo land) that Arqiva might start by converting one of it's other COM multiplexes to T2, but this would no doubt take place progressively on the 80+ main transmitters that currently broadcast COM multiplexes. Freeview Light transmitters which only broadcast the 3 PSB multiplexes are likely to be last to be done and would probably require some government funding.
To put the whole thing into context for you, there are over 1100 TV transmitters in the UK!

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Chris.SE's 4,102 posts GB flag
Saturday, 10 October 2020
O
OWEN MC
3:14 AM

Why is Divis not transmitting channel 50? It's listed on some sites as available but it is clearly not.
Is there any way of accessing this channel from another transmitter?
I live in the North Armagh area.

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OWEN MC's 1 post GB flag
S
StevensOnln1
sentiment_very_satisfiedPlatinum

11:26 AM

OWEN MC: Sony Movies Classic is on the Local TV multiplex, which is broadcast from both Divis (at low power) and the nearby Black Mountain transmitter, however the signal is targeted at Belfast and you are likely too far away to receive it. I don't believe there are any other transmitters carrying a Local TV multiplex in Northern Ireland.

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StevensOnln1's 3,606 posts GB flag
Monday, 26 October 2020
J
Jonny
12:53 AM

I am in Lisburn but am unable to receive channel 50 which is now the Sony Christmas channel. Is there any way to get this channel?

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Jonny's 1 post GB flag
S
StevensOnln1
sentiment_very_satisfiedPlatinum

10:40 AM

Jonny: Sony Christmas Channel is carried on the local TV multiplex, which is only available in areas where there is a local TV station on Freeview channel 7 or 8. In Northern Ireland this is only available to viewers in the Belfast area who are able to receive either the Black Mountain or Divis transmitters.

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StevensOnln1's 3,606 posts GB flag
Thursday, 5 November 2020
R
ROBERT MCDONNELLL
1:33 PM

I was receiving com 7 in Mallusk from Divis but today none of the com 7 channels are working?
Is the transmitter using lower power?

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ROBERT MCDONNELLL's 1 post GB flag
C
Chris.SE
sentiment_very_satisfiedPlatinum

3:11 PM

ROBERT MCDONNELLL:

I can't find any reports of Transmitter issues, and it's not currently listed for Planned Engineering.
It depends where you are, a full postcode would be needed to look at the predicted reception. Not all your area is well covered due to the terrain. If your COM7 signal is marginal then reception at present is not going to be helped by some predicted "Tropospheric Ducting" around with the current high pressure which may result in interference from distant transmitters in Europe or the UK. This can affect some (not always all) of the multiplexes at varying times! (see Effect of tropospheric ducting on Freeview | RTIS for a simplistic explanation).

If your set does automatic retuning, it's possible that if it lost signal (eg.due to interference) and retuned when there was no decodable signal it may well have just cleared the correct tuning.
I always recommend turning off any automatic retuning to avoid such problems and only retuning when there's been a change to channels that require it (these days that should only happen if broadcasters alter their programme channels and services provided as 700MHz clearance has been completed).

Try a manual tune for COM7 C55. You might have to try several times if interference is still present.
Have a look in your TV tuning section for the Signal Strength and Quality. High signal and low quality are frequently a sign of interference.

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Chris.SE's 4,102 posts GB flag
Thursday, 4 February 2021
J
JONNY MCCULLOUGH
10:45 AM
Craigavon

Hi All,

Hoping someone can help. Has anything changed within the the last 2 - 3 weeks with Divis? I'm having problems with BBC SD channels pixlating and I've lost COM 7 for quite a while, tried a few re tunes/ resets. No changes with the aerial (roofspace). postcode BT667NR.

Thanks,

Jonny

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JONNY MCCULLOUGH's 1 post GB flag
JONNY's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
C
Chris.SE
sentiment_very_satisfiedPlatinum

4:28 PM

JONNY MCCULLOUGH:

Nothing listed that I can find, no Planned Engineering or Live issues according to Freeview and no faults reported by the BBC recently.

See the post before yours for some general advice, not that there's been any "tropo" very recently.
I don't suppose you've got inadvertently tuned to Brougher Mountain instead of Divis for the BBCA/PSB1 (SD) multiplex? Brougher Mountain is on UHF channel C29 whereas Divis is on C27.

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Chris.SE's 4,102 posts GB flag
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