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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Thursday, 4 February 2021
C
Chris.SE4:32 PM
JONNY MCCULLOUGH:
To add to my previous, I don't suppose you've moved anything around in your roofspace, especially anything metalic?
Also check you don't have any HDMI leads behind your set running close to aerial or flyleads, especially when the latter aren't quality double screened coax. HDMI can cause interference but especially to C55 - COM7.
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Tuesday, 30 March 2021
S
StevensOnln14:01 PM
E Chartres: RTE1 and RTE2 are broadcast on the NI mux (along with TG4 and RTE's Irish language radio station) from various transmitters in Northern Ireland, including a low power transmitter at Divis, although there is a higher power transmitter nearby at Black Mountain which covers most of Belfast and large parts of the surrounding areas. Most aerials pointed at Divis will also be able to receive the NI mux from Black Mountain, the low power NI mux transmitter at Divis is there to fill in gaps in coverage.
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Monday, 3 January 2022
C
Carl Reade12:59 AM
Hi is tHere an issue With channel 55? pixelating in the Antrim area over the last few weeks. No other channels effected.
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C
Chris.SE3:37 AM
Carl Reade:
Hi Carl. No transmitter issues AFAIK and the BBC haven't got anything listed. The transmitter was listed for Planned Engineering w/c 13/12/21.
There has been some tropo around however, some the last few days but that should now have cleared. There was also some for around a whole week in mid-December which didn't clear until after the 23rd. HTH.
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T
Tony10:10 AM
The information for Divis appears to be out of date.
NIMM (RTE etc) etc is on 33
I cannot find com 7 in Bangor, its certainly not on 33, unless there is a problem with my receiver
Can anyone tell me the channel number for com 7?
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S
StevensOnln112:54 PM
Tony: COM7 is broadcast from Divis on UHF channel 55, it is not available from any other transmitter in Northern Ireland and is due to close at the end of June when it's licence expires.
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C
Chris.SE2:14 PM
Tony:
It's the "transmission frequencies change over time" section that has the main errors that the site owner has not "clarified". The main section at the top of the page is correct other than the channel for the Local Belfast LBT mux which is C36 not C30.
All the channels are listed correctly in this post Divis (Northern Ireland) Full Freeview transmitter | free and easy
but also note that Arqiva closed COM8 for commercial reasons at the end of June 2020.
COM7 has been recently mentioned in these posts -
Divis (Northern Ireland) Full Freeview transmitter | free and easy
Divis (Northern Ireland) Full Freeview transmitter | free and easy
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Tuesday, 4 January 2022
D
Denis11:14 AM
Tony:
NVTV (TV Ch7) is on Mux ch 36 (NIMM 594GHz). In Killyleagh I get 100% strength from a communal 21 element Mux Master with a (11dBi gain). The 100% reading on my Samsung is somewhat arbitary, I don't know what signal strength it relates to. The Divis details show a transmitter power of 5kW. Given such a strong signal I doubt if it is that low.
Some parts of Bangor are in a shadow. You can check using a line-of-sight tool (such as on Solwise).
COM7 is Mux 55 and contains Freesports, PBS, BBC News HD. It needs a HD tuner. 100% signal in Killyleagh.
The TV Channel numbers, as shown in the TV Guide, change frequently and can move to another Mux, but the big ones don't.
Try to find signal information on your TV. It is often hidden away. On my Samsung it is settings>support>device care> self diagnosis and not in the tuning menu where you'd expect. LG is easier.
Let's know how you get on.
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Friday, 15 April 2022
S
SAMUEL WILSON1:41 PM
BT38 LT for the past week we have been getting background voice overs eg " Man enters room and coughs" on some of the Divis channels.
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