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 11/11/2024 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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Friday, 20 April 2012
C
Carl10:40 PM
Mux A channel 23 is up to its old tricks again! I have had numorous emails about this in the last 4 days. Is this going to be sorted once and for all? If the last place to go digital is not working now what hope is there for switchover?
I have read about Caldbeck and conditions reasons like this will not be acceptable to the public after October!
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Saturday, 21 April 2012
P
Peter Henderson12:50 AM
Newtownabbey
Noticing some breakup on 23 here too Carl.
This channel has always ben weaker than the rest at this location, with 34 being the strongest by far (despite being only 1.6 kw).
I'm afraid there's really nothing we can do about the situation until after October 24th.
50kw will be a massive increase in power compared to the measly 2.3 kw that we have now.
To be honest, I can't see why Divis couldn't have something of a power increase (10 kw for example) and the HD channels added between now and then, given there are only four regions left to switch, but I suppose they have to follow protocol on these things.
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Peter's: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
R
Robin2:59 PM
I'm noticing breakup on channel 48 (carrying Sky News, Dave etc) on Divis over the last week or so. Signal strength and quality is varying wildly in BT23 area.
Hope this issue is sorted ASAP - can we advise Divis operators of our issue in any way?
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Monday, 23 April 2012
C
Carl12:38 AM
So judging by no reply what so ever that there is a problem, yes there is a problem and we hope it can be sorted when the switchover happens?
The government has sold all the frequency Fact!
Made a fortune Fact!
Mobile phone companies buying from government Fact!
Are you going to have problems with your viewing after DSO yes Fact!
Please feel free to say different!
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P
Peter Henderson2:05 PM
Newtownabbey
On screen messages have now started appearing on BBC1 and BBC2 telling us DSO will happen in October.
Not long to go now.
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Peter's: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
Wednesday, 25 April 2012
C
Carl11:01 PM
Caldbeck is not causing all Divis problems unless I and others I know are living in a constant weather lift!
Do everyone a favour and just turn off CH 23 Mux A until it works.
I can bet if there was a BBC licence paying channel on this Mux these problems would not exist!
Now becoming a bad joke!
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Thursday, 26 April 2012
P
Peter Henderson1:15 AM
Newtownabbey
Carl: If you wait for another 6 months I would imagine reception on channel 23 will be fine.
If you can't wait until then, I'd invest in Freesat. As far as I'm aware, all the channels that are on channel 23 are on Freesat i.e. ITV 3, 5USA, 5*, QVC etc.
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Peter's: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
Friday, 27 April 2012
C
Carl7:09 PM
Peter: I am an installer it is my customers I speak for when I have to explain why they are not getting channels. 23 and 33 are in my opinion a disgrace at the minute. The quality is poor on my insruments but the signal can be booming in so a 16db increase in October does not give me any confidence at all. I have freesat HD on my main room but it does not show the Quest channel etc.
The good news for Freesat users is that they are adding 24 HD live feeds for the Olympics!
Which you will not get off a transmitter that cant even cope with Freeview Mpeg2. Perhaps this is one for Ofcom?
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P
Peter Henderson9:38 PM
Well Carl, one of the reasons is that Freeview power levels in NI, pre DSO, seem woefully low compared to the rest of the UK. All other main transmitters were 10 or 20 kw before switchover, not 2.3/1.6 kw. (800w for Brougher asnd Limivady). For example, Black Hill and Rowridge were both 20kw. Why NI Freeview ERPs are so low is beyond me. Surely, between now and DSO they could increase the power at Divis to at least 5, or maybe 10 kw and add the HD channels between now and October ? Why, as usual, does NI have to wait so long for these advances in broadcast technology to come to the province (the DAB situation and lack of Digital One is another disgrace) ?
Not having Freeview HD is a real pain, especially as we miss out, yet again, on two major sporting events. GRRRRRRRR.
Still, roll on October Carl. I'm counting down the weeks
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Peter Henderson9:44 PM
P.S. 23 isn't great hear either Carl (Jordanstown) but during the high power tests in January signal levels were endstopping, even on 23.I also think the switch to 8k mode whould also improve things.
If you're getting some sort of signal, even if it's breaking up, October should show a massive improvement. I'm highly optomistic about this if the tests in January are anything to go by.
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