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 25/09/2023 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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Thursday, 25 October 2012
K
Kevin Coyle11:02 PM
Belfast
Thanks Carl
Picture before DSO was fine. I've no idea if I have a mast amplifier. I'm afraid I'm totally ignorant when it comes to TV stuff.
I suspect I should get a local TV engineer to have a look at things.
Its an LG TV and I found a Booster option in the settings. When I switch it on then the picture improves to the point of being very watchable. Just the odd breakup of signal.
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Kevin's: mapK's Freeview map terrainK's terrain plot wavesK's frequency data K's Freeview Detailed Coverage
C
Carl11:31 PM
Just another one I have found since DSO a lot of people have their sky channel set on 40 for feeding around the house this directly effects the NIMM which is now transmitted on 39 hence you will need to change the rf channel of the sky box to 45 in Divis area.
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Friday, 26 October 2012
Sinead: Do you just have the one aerial?
Do you have another aerial pointing a bit clockwise of south which you used previously to receive RT from the Republic? If so and this is connected to the aerial lead coming into your lounge, then this could be relevant to being unable to receive the NI Mux on C39.
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Sinead: As Carl says, ensure that there isn't something like a Sky box that could be interfering. If there is, then for test purposes, connect the incoming aerial directly to the Freeview HD receiver box you are trying to get RT channels on.
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S
Sinead11:01 AM
Dave
I have just got one aerial pointing out towards the Black Mountain. My neighbours have 2 aerials. I am missing the long horizontial one, so I will get this sorted. I don't have Sky so that isn't the problem, it must be the aerial.
Carl, My friend updated her I-Can box last night with the software update, she lives in another part of Belfast and since the update has been able to receive RTE, RTE2 and TG4.
Thanks for the advice to dat, I will keep you posted on how I get on.
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P
Peter2:06 PM
Hi,
Can somebody help please? I cannot pick up channels from Mux: SDN, ArqA, ArqB. Only from Mux: BBCA and D3+4. My postcode is BT13 3WG, aerial is on the roof. Thank you (54.6054,-5.9849)
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J
Joe2:25 PM
Hi I am living in the south I have an MPEG4 television, I rescanned all channels and I now receive all staions on the BBCA channel27 but I cannot receive any other channels from the Divis transmitter. Any suggestions?
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C
Carl4:52 PM
Peter have you any signal quality or strength readings on the ones you are getting??
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