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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 24/06/2024 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 ITV3 +1, 59 ITV4 +1, 64 Blaze, 67 TRUE CRIME, 68 TRUE CRIME XTRA, 78 TCC, 81 Blaze +1, 83 Together TV, 91 WildEarth, 93 ITVBe +1, 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), 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, 18 November 2011
P
Peter Henderson
10:46 PM

Sorry, that should be post 156.

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Peter Henderson's 12 posts GB flag
P
Peter Henderson
10:47 PM

Also , details of the tendering process are provcided in the links.

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Peter Henderson's 12 posts GB flag
Sunday, 11 December 2011
J
Jack McKnight
11:44 PM

Hi.My sister lives in Glengormley and on my next visit"across the water" I'd like to fix up Freeview for her. Can somebody tell me if this is possible,and,in which direction I should point the Yagga? aerial please.Also,how many Freeview channels would she receive, and will this number increase following full switchover in 2012, Thanks a lot.

link to this comment
Jack McKnight's 4 posts GB flag
Monday, 12 December 2011
Dave Lindsay
sentiment_very_satisfiedPlatinum

12:15 AM

Jack McKnight: In order to get the full set of commercial channels, your sister's aerial will need to point at Divis. Whether reception from Divis is possible at her location is another matter and a post code might help get an idea.

It is also worth looking to see what the neighbours have (types of aerials and their direction). Google Streetview might help with that.

The main relay in Glengormley is Carnmoney Hill and post-switchover this will be a Freeview Light transmitter, meaning that it won't broadcast the commercial multiplexes.

Here's what mb21 says about the reason for Carnmoney Hill:
mb21 - The Transmission Gallery
"Carnmoney Hill was built due to what I've named the bowl effect. Newtownabbey is shielded from Divis by Cavehill, a rock outcrop in North Belfast - like a cereal bowl with a hill in the middle. Newtownabbey is sandwiched in the valley below and can't receive Divis."

If your sister can't receive from Divis and she already has an aerial on Carnmoney, then I suggest that that will be the best that she can get on Freeview and therefore that no replacement aerial will be needed.

If you are looking at DIYing, then I recommend you have a look at ATV Sheffield's website for lots of information on this subject: www.aerialsandtv.com

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Dave Lindsay's 5,724 posts GB flag
P
Peter Henderson
11:36 AM

She might be better goung for Freesat if she can't get Divis post DSO Jack.

As Dave says, have a look around and see where all the other antennas are pointing. The ones that are vertically polarised will be Carnmoney Hill. Those with horizontal polarisation will be Divis.

You may well find some very large aerials on older houses pointing towrds Divis, with newer developments using Carnmoney Hill (Catnmoney Hill only came on air in the 1980s)

Incidentally, if she has an aerial pointing towards Carnmoney Hill, it might be a good idea to keep this as the site will carry the new RTE mini multiplex post DSO i.e. RTE1, RTE2, and TG4 (along with a possible fourth TV channel and radio station).

RTE isn't vailable on Freesat.

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Peter Henderson's 12 posts GB flag
Wednesday, 14 December 2011
P
Peter Henderson
4:09 PM

Sorry guys, but what has any of this got to do with Freeview from the Divis transmitter ?

link to this comment
Peter Henderson's 12 posts GB flag
M
Mike Dimmick
sentiment_very_satisfiedPlatinum

4:19 PM

Peter Henderson: It's simply spam. Ignore it, or tell Briantist about it.

link to this comment
Mike Dimmick's 2,486 posts GB flag
P
Peter Henderson
7:38 PM

Thought it might be Mike.

I see Brian's removed it already.

link to this comment
Peter Henderson's 3 posts GB flag
Thursday, 15 December 2011
J
JackMcKnight
11:34 AM

Peter Henderson. Thanks very much for taking the time and trouble to answer my questions on Freeview acquisition for my sister who lives on the Carnmoney Road Near to the library. I could only spot one Digital aerial locally and this appears to point at Divis/Cave Hill direction and is horizontally polarised.Currently my sister has an older aerial pointing to(I think-Carnmoney). Analogue reception on this aerial is very good, so maybe it'll be better to point a wideband one in this direction?? Would this be vertical or horizontal polarity please? Thanks again for all your help- I really appreciate it.P.S. I trust that Mike Dimmock's reference to "SPAM" is not directed at me.

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JackMcKnight's 4 posts GB flag
P
Peter Henderson
2:54 PM

Was on the Antrim Road area of Glengormly about half an hour ago Jack and it looks like all the aerials are pointing towards Carnmoney Hill, even on the older houses, so it looks like Freesat if she doesn't want to pay for extra channels from Sky or Virgin etc.

After DSO Divis will only require a group A antenna, but I'd be inclined to run with Freesat and Carnmeny Hill (which will also carry 3, or maybe 4 RTE stations). Might be simpler in the long run.

With the addition of 5* and 5 USA, along with Channel 5+1, Freesat is virtually as good (if not better) than Freeview these days anyway. and a far better option than Feeeview Lite.

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Peter Henderson's 12 posts GB flag
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