Full Freeview on the Divis (Northern Ireland) transmitter
 | Google Streetview |  | Google map |  | Bing map |  | Google Earth |  | 54.607,-6.009 or 54°36'24"N 6°0'34"W |  | BT17 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 25/11/2024 Pixelation or flickering on some or all channels 
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Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
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 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.
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?
BBC Newsline 0.6m homes 2.5%
from Belfast BT2 8HQ, 1,044km northeast (51°)
to BBC Northern Ireland region - 46 masts.
Are there any self-help relays?
| Chapel Fields | Transposer | Central Belfast | 61 homes |
How will the Divis (Northern Ireland) transmission frequencies change over time?
| 1950s-80s | 1984-97 | 1997-98 | 1998-2012 | 2012-13 | 4 Mar 2020 | ||||
| VHF | A K T | A K T | A K T | K T | W T | ||||
| C1 | BBCtvwaves | ||||||||
| C21 | C4waves | C4waves | C4waves | +D3+4 | D3+4 | ||||
| C23 | SDN | SDN | |||||||
| C24 | ITVwaves | ITVwaves | ITVwaves | BBCB | BBCB | ||||
| C26 | ArqA | ArqA | |||||||
| C27 | BBC2waves | BBC2waves | BBC2waves | BBCA | BBCA | ||||
| C29 | ArqB | ||||||||
| C30 | LBT | ||||||||
| C31 | BBC1waves | BBC1waves | BBC1waves | ||||||
| C33 | com7 | ||||||||
| C34 | com8 | ||||||||
| C36 | _local | ||||||||
| C48 | NIMM | NIMM | |||||||
| C55tv_off | com7tv_off | ||||||||
| C56tv_off | COM8tv_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
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Wednesday, 9 November 2011
P
Peter Henderson11:12 AM
Tim: noticed all stations on channel 23 were poor last night (unwatchable) so it may well have been conditions.
Roll on next October.
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Friday, 18 November 2011
P
Peter Henderson7:18 PM
Details of the new RTE mini Mux have been apparently announced yeasterday.
Black Mountain at 2/1kw, Brougher at 1KW, and Carbmoney Hill at 16w.
So, no Divis then, but at least Black Mountain is at a higher power.
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P
Peter Henderson10:46 PM
Post 159 provides the info and all the necessary links Brian:
http://www.boards.ie/vbul…e=11
Lots of technical info as well.
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P
Peter Henderson10:46 PM
Sorry, that should be post 156.
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P
Peter Henderson10:47 PM
Also , details of the tendering process are provcided in the links.
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Sunday, 11 December 2011
J
Jack McKnight11:44 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.
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Monday, 12 December 2011
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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P
Peter Henderson11:36 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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Wednesday, 14 December 2011
P
Peter Henderson4:09 PM
Sorry guys, but what has any of this got to do with Freeview from the Divis transmitter ?
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