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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.

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, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, 601 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, 24 ITV4, 33 UTV +1 (UTV),

PSB3
BBCB
 H max
C24 (498.0MHz)551mDTG-6100,000W
Channel icons
74 Shopping Quarter , 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, 204 CBBC HD, plus 1 others

COM4
SDN
 H -3dB
C23 (490.0MHz)551mDTG-850,000W
Channel icons
12 Quest, 20 Drama, 21 5USA, 23 CCXTV, 27 ITV2 +1, 30 5STAR, 31 Paramount Network, 40 Sony Movies Action, 44 Channel 5 +1, 54 5SELECT, 58 ITV3 +1, 59 ITV4 +1, 63 Blaze, 66 CBS Reality, 70 Horror Channel, 77 TCC, 80 Blaze +1, 97 ITVBe +1, 203 CITV, 211 Ketchup, plus 15 others

COM5
ArqA
 H -3dB
C26 (514.0MHz)528mDTG-850,000W
Channel icons
11 Sky Arts, 17 Really, 19 Dave, 28 E4 +1, 29 4Music, 34 pick, 38 Quest Red, 41 Food Network, 45 Film4 +1, 46 Challenge, 47 4seven, 56 Smithsonian Channel, 75 Yesterday +1, 76 Quest +1, 87 Together TV, 233 Sky News, plus 9 others

COM6
ArqB
 H -3dB
C30 (546.0MHz)528mDTG-850,000W
Channel icons
25 Yesterday, 32 Sony Movies, 37 DMAX, 39 CBS Justice, 42 HGTV, 67 CBS Drama, 79 Dave ja vu, 81 Talking Pictures TV, 91 PBS America, 234 RT, 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
34 Merit, 64 FreeSports, 72 Quest Red +1, 83 NOW 80s, 86 More4 +1, 88 Together TV +1, 93 PBS America +1, 96 Forces TV, 106 BBC Four HD, 107 BBC News HD, 113 RT HD, 114 Quest HD, 205 CBeebies HD, plus 2 others

NIMM
 H -40dB
C48 (690.0MHz)551mDTG-10W
Channel icons
from 4th September 2019: 51 TG4, 52 RTÉ One, 53 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 - 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

link to this comment
john cunningham's 1 post GB
C
Chris.SE
sentiment_satisfiedGold

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!

link to this comment
Chris.SE's 1,834 posts GB
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.

link to this comment
OWEN MC's 1 post GB
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.

link to this comment
StevensOnln1's 2,920 posts GB
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?

link to this comment
Jonny's 1 post GB
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.

link to this comment
StevensOnln1's 2,920 posts GB
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?

link to this comment
ROBERT MCDONNELLL's 1 post GB
C
Chris.SE
sentiment_satisfiedGold

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 https://www.radioandtvhelp.co.uk/help-guides/television/effect-of-tropospheric-ducting-on-freeview 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 1,834 posts GB
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