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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
_______

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
Sunday, 24 March 2013
P
P. Kieran Ward
sentiment_satisfiedBronze

12:30 AM
Belfast

Hi all! Here is one way to get over 'No Signal' problems is the way my daughter used when Divis was off. We were watching Law and Order on Channel 5 and when Divis went down was to watch the remainder of the show via the internet. It looks like some of the muxs are still off air at 12.30am Sunday.


link to this comment
P. Kieran Ward's 89 posts GB
P
Peter Henderson
sentiment_satisfiedSilver

5:07 PM

Another good reason to have Freesat as a back up, even if you have good terrestrial reception.

I well remember the major fault at Divis in the late 70's (or was it the early 80's ?) when we had no TV for almost a week. The transmitter was subsequently on low power4 for several months afterwards.

Satellite or cable didn't exist in those days, so it was all very frustrating!

link to this comment
Peter Henderson's 240 posts GB
Friday, 29 March 2013
P
P. Kieran Ward
sentiment_satisfiedBronze

11:53 PM

Has anyone heard what is causing the problem with the Divis Transmitter?

link to this comment
P. Kieran Ward's 89 posts GB
Saturday, 30 March 2013
M
Michael
sentiment_satisfiedGold

12:30 AM

P. Kieran Ward: What problem?

link to this comment
Michael's 358 posts GB
Sunday, 31 March 2013
P
P. Kieran Ward
sentiment_satisfiedBronze

12:32 AM

Michael

If you read the previous posts re: Transmitter engineering on Divis. It would appear that it is now effecting radio transmissions while earlier it was some TV. I was just wondering if it was due to additional engineering for changes later this year - i.e. Northern Visions etc.

Regards

Kieran

link to this comment
P. Kieran Ward's 89 posts GB
Tuesday, 2 April 2013
P
Peter Henderson
sentiment_satisfiedSilver

2:25 AM

The DAB problem could be due to the fact that Digital One will be broadcasting from Divis in a few months time.

I think FM transmissions are still from the old mast.

link to this comment
Peter Henderson's 240 posts GB
Tuesday, 30 April 2013
G
Gary
11:24 PM
Donaghadee

Whats happening, lost signal to film4, did a suggested re-tune, now instead of 144 channels i have only 66.
is there transmitter maintenance going on, this has been playing for the past week or so? has this something to do with 4G masts problem from 2013 - 2017, thats along time to have to put up with poor signals.
roof top vertical mast.
oh further a further re-tune have given me 103 channels, oh another re-tune has given me 144 channels again.
i thought the digital switchover was to sort out these old issues.

link to this comment
Gary's 1 post GB
Thursday, 2 May 2013
W
wayne cochrane
11:05 AM

Donaghadee seems to be in a good reception area for the Divis main transmitter, but could be prone to interference from Caldbeck in NW England.

I don't think they've done any 800 MHz 4G tests in NI yet.

Might be no harm to get your aerial system checked out.

link to this comment
wayne cochrane's 8 posts IE
Monday, 17 June 2013
Arun
12:27 PM
Stoke-on-trent

Hi Brian,
I see that there has been some transmitter engineering on the Divis transmitter on the 12th of June.
Some of my equipment recorded a momentary loss of signal on one of the multiplexes (COM6), at approximately 11:00 AM on the 12th June.
Would it be possible that the transmission was interrupted due to the engineering works ?
Thanks,
Arun

link to this comment
Arun's 7 posts GB
Briantist
sentiment_very_satisfiedOwner

1:14 PM

Arun: It's possible. The BBC "R+T Investigation" system doesn't report the COM multiplexes, so you have to (as they told me) "infer" what is happening to them.

It looks like the event was a mains power failure, to which systems probably have a certain amount of backup.

So... basically "yes".

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Briantist's 38,844 posts GB
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