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.
This transmitter has no current reported problems
The BBC and Digital UK report there are no faults or engineering work on the Divis (Northern Ireland) transmitter._______
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 August 2011
Peter Henderson: The DSO process (well, for the view) starts two weeks before it ends, so "the middle of the year" must be referring to preparatory work.
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P
Peter Henderson11:40 PM
Newtownabbey
There are three main transmitters in NI Brian so I assume he's probably referring to all of them over the period i.e. Brougher, Limivady, and Divis.
I take it they do all switch at different times ?
I think Limivady is due to go first.
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Peter's: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
Friday, 5 August 2011
M
Mike Dimmick4:53 PM
Peter Henderson: We simply don't know yet. Typically the dates are announced with about a year to go. For example, London (4 April 2012) was announced on 7 April 2011, Meridian West (lead transmitter Hannington: 8 Feb 2012) on 15 Feb 2011, and Meridian East (lead Heathfield, 30 May 2012) on 10 May 2011. The later the announcement comes, the later the switchover is likely to be. I think the shortest period between announcement and switchover was for the Channel Islands, about 10 months in advance.
Every region that Ulster TV borders has already switched over, so I don't really see any reason why it can't all happen on the same day. The Sutton Coldfield/Emley Moor switchover next month affects many more relay transmitters and people than all of the Ulster region. Fenton switches on the same dates so that's three 'Full Freeview' transmitters on the same date. The most is five main transmitters with some work to do on the same day - Oxford DSO2, Mendip, Bromsgrove, Lark Stoke and The Wrekin retune and power up all on 28 September, Nottingham and Sheffield have a retune and power up scheduled for the day before.
Some co-ordination may still be required with the Republic, I'm not sure if they've started up Saorview on final channels or not. Because of the pull-out of the commercial provider, they seem to have only launched two multiplexes so far, and one of them just contains placeholder content according to Wikipedia, so they may not have as tight frequency requirements as we do, right now.
Looking at the Geneva 2006 frequency plan, it appears Ireland asked for 4 frequencies at each major site, in addition to their existing analogue frequencies, so the co-ordination may already have been done. (They still use Band III VHF for RTE1 and 2 at many sites, so only six UHF frequencies total are required at those sites, before analogue switch-off.).
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Monday, 8 August 2011
Peter Henderson: The original Arqiva plan I saw had Northern Ireland doing switchover in three batches, but they may decide that it is easier to do the whole area in one go.
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Saturday, 13 August 2011
J
John Francis9:21 PM
Does this mean that in NI we'll get all of the UK content plus RTE content or a reduced UK content plus RTE (or something else)?
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Sunday, 14 August 2011
P
Peter Henderson12:05 AM
Newtownabbey
I see you've brought forward the approximate date to December next year Brian. Have you heard something ?
John: as far as I'm aware, the mini RTE Mux is in addition to Freevuew. Channel 30 had been mooted for this, but it now seems as if it's going to be used for local TV, which I assume will be NVTV as it's already broadcasting.
I've read that channel 48 may be used for an additional Mux at Divis
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Peter's: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
Peter Henderson: All the official documentation says the whole UK switchover is complete by the end of 2012, so I have adjusted the projected dates to reflect that.
Don't make any assumptions about who, if anyone, will get the Channel 6 local TV allocation. This is all out for consultation at the moment.
As for the services, the official position is Lords Hansard text for 12 Jan 201112 Jan 2011 (pt 0001) :
"Radio Telefis Eireann (RTE) broadcasts are currently available to some homes in Northern Ireland by virtue of overspill signals from transmitters located in the Republic of Ireland. Consequently, there have been no costs to the UK Government.
As set out in my Written Statement to the House on 20 December, the UK and Irish Government have agreed that the most effective way to provide for the continuing provision of TG4 in Northern Ireland following the digital switchover is to build a new, low-power TV multiplex in Northern Ireland. This multiplex will also carry RTE 1 and RTE 2.
Work on the cost elements of the new multiplex is continuing. The costs of broadcasting RTE 1 and RTE 2 will be met by the relevant Irish authority on a pro rata basis, according to the proportion of the new multiplex used. The other costs will be met by the UK."
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Monday, 15 August 2011
John Francis: The proposal is that if you have a Freeview HD box you will get the RoI services in addition to the UK ones.
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Peter Henderson10:35 AM
"Don't make any assumptions about who, if anyone, will get the Channel 6 local TV allocation. This is all out for consultation at the moment."
If NVTV don't get it Brian, does this mean they'll be forced to close down post DSO ?
I can't imagine Ofcom allowing them to continue on analogue.
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Peter Henderson: Yes, that is correct. There is no provision for the automatic roll over of the existing local TV licences to the digital service.
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