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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Monday, 2 September 2019
Hi can someone confirm that channels 33 and 34 are moving to 51 and 60 on Wednesday?????
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P
PeterH8:00 PM
Yes, that is correct Carl
Sometime in March they'll move again to 52 and 56
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PeterH: thanks I assume there will be an issue then with 50/52 diplexers fitted for Freeview and RTE?
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P
P. Kieran Ward 9:41 PM
Belfast
Re: the move for Com 6 and Com 7 from UHF 33 and 34 to UHF 51 and 60, and then next year the move to UHF 52 and 56. Where are the two Saorview multiplexes from the Saorview Transmitter on Clermont Carn Co. Louth which are currently transmitting on UHF 52 and 56 moving to? I have emailed RT asking this question but to date they have not replied!
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P.'s: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
P. Kieran Ward : have to say the lack of information about this is shocking! From what I can gather yes that's the case with com7,8. Apparently RTE will be broadcasting in the 40s somewhere come March. Which means every Freeview/RTE rig is going to have to be totally changed as far as I can see.
I'm struggling if that's the case how you can boost the RTE without overloading Freeview in the 30s area of the band.
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Tuesday, 3 September 2019
P
PeterH1:28 AM
Currently, I have a wide and aerial for Divis and group CD for RT, both diplexed into one downlead
I've an aerial installer coming tomorrow and he's going to fit a new wideband aerial for Divis and another for Clermont Cairn.
I'm assuming that after this, the PSB muxes and NIMM from Carnmoney Hill will take priority on ant retune on Wednesday, with the other Freeview muxes coming from Divis.
The PSB muxes from Divis, and the NIMM from Black Mountain may or may not be in the 800's along with Saorview.
Digital U.K. are predicting the LBT mux will improve significantly after Wednesday, so I assume it's moving further up the mast.
Portpatrick is also changing from group CD to group A, with Digital U.K. predicting my reception will improve as well.
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Wednesday, 4 September 2019
C
Chris.SE7:32 AM
CARL READE: & PeterH:
Yes the COMs 7&8 muxes are moving to 51 & 60 today. BUT sometime in Q1 2020 (may not be March, date is TBA as far as I can see) they will be moving to 55 (not 52) & 56 as the rest of the UK where transmitted (not all transmitters broadcast them).
This and the retune event is part of the 700Mhz clearance see http://www.digitaluk.co.u…nce.
For Freeview predicted reception use the coverage checker Digital UK - Coverage checker if you have a UK postcode. For Saorview you will probably have to google to get the information.
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PeterH5:11 PM
After yesterday's aerial installation, of which I've spent a considerable amount of money, COM 7 and COM 8 were both perfect along with Saorview on 52 and 56 ( I was getting some break up on COM 7 and 8,; and Saorview mux 2 on 56).
Today, no signal from either COM 7 or COM 8,. Initially, a good signal with a blank screen, but subsequent retunes have shown nothing.
CAN ANYONE CONFIRM BOTH ARE STILL OF AIR AS OF 6 PM TODAY ??????
No DTT Through the night, other than Saorview.
Complete and utter shambles.
Despite Digital U.K.'s predictions, reception of the LBT mux hasn't improved significantly at all.
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PeterH: yes they are there. Was a diplexer fitted as I fitted a Freeview, RTE rig yesterday now having to use an inductive splitter for Divis and Claremont. Another issue now is channel 60 is right beside 4G and I have had a number of people reporting breakup.
To be honest this is a cluster.
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PeterH: yes they are there. Was a diplexer fitted as I fitted a Freeview, RTE rig yesterday now having to use an inductive splitter for Divis and Claremont, diplexers are no longer any use now. Another issue now is channel 60 is right beside 4G and I have had a number of people reporting breakup, which will require a filter which is unlikely to solve as they are so close.
To be honest this is a cluster.
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