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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Saturday, 9 November 2013
MikeP
11:14 PM
11:14 PM
PaulN :
It has been pretty much standard practice with small transformers of the type used in such power units to have a small safety cut-out fuse included, mounted so that any excess heat in the windings causes it to fail safe. Such heat would normally be the result of a fault either in the windings themselves or the secondary side components. A correct repair would be to replace the transformer if available and you are competent at such repairs, remembering that you are dealing with mains voltages (230 Volts). Replacing the whole power unit as perhaps a better, safer alternative, but make sure you use the correct unit to maintain safety of all equipment connected.
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Sunday, 10 November 2013
P
PaulN7:19 PM
I found it much easier and cheaper to replace the entire power supply with an external AC/DC converter. The labgear unit has a nice convenient flying lead where I was able to splice on a connector for the external converter. Cost me like 4 quid plus some scraps of wire and connectors I had about the place. Oh and I replaced the labgear power led with a 12V version for convenience. The new converter has a 1A rating while the old transformer was stickered for 400mA at 12V so I have plenty of headroom.
I may yet investigate the old transformer for the thermal fuse but I have a good result with a cheap, safe repair.
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J
jb389:33 PM
PaulN: As far as the old transformer is concerned its not really worthwhile replacing the thermal fuse anyway as its not really known for sure what caused it to fail in the first place, as although its not exactly unknown for a T/ fuse to fail as simply "one of those things" and with replacement of same bringing the amp back into life, but though on the other hand the overheating "might" have been due to the transformers primary having developed a partial short across a few of the windings thereby over-volting the remainder and causing excessive current to be drawn, and so if the fuse had simply been replaced you might possibly have found that the problem re-occurred after an hour or so when the transformer reached the point where the heat once again resulted in the fuse to failing.
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Wednesday, 13 November 2013
P
Pauric11:54 PM
Hi
I was just wondering since digital switchover I was able to receive all the digital channels but than I lost CH 23 and a few weeks ago I lost CH26 I get my freeview signal from Divis and saorview from Clermont carn. Is it interference and what can I do to get them back, I live in south Co Monaghan
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Thursday, 14 November 2013
P
P. Kieran Ward11:38 PM
Belfast
Hi Pauric!
You have indicated that you have lost both Channel 23 and Channel26 a few weeks ago. Have you manually rescanned both these channels? I know that was recent work being undertaken at the Divis Transmitter but no major changes have taken place at that time. The stations that you are looking for in a rescan are as follows:
COM4/SDN on Channel 23
10 ITV 3,
20 Drama,
25 Dave ja vu,
27 ITV 2 +1,
30 5*,
31 5USA,
38 Quest,
39 The Zone,
44 Channel 5 +1,
55 5 Later,
61 True Entertainment,
63 ITV 3 +1,
72 CITV,
16 QVC,
23 Bid,
49 The Jewellery Channel.
There is also a number of Adult, Digital Radio and Text channels transmitted on this UHF channel.
COM5/ArqA on Channel 26
11 pick,
12 Dave,
17 Really,
29 E4+1,
32 Movie Mix,
41 Food Network,
42 Travel Channel,
46 Challenge,
82 Sky News,
87 Community Channel,
36 Create and Craft,
37 Price Drop TV,
43 Gems TV 1.
There is also a number of Adult, Digital Radio and Text channels transmitted on this UHF channel.
I hope you get your missing stations back with rescanning the two channels.
P. Kieran Ward
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P.'s: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
Monday, 18 November 2013
S
Samantha2:46 PM
Carrickfergus
Hi, on Saturday evening I was experiencing major interference on UTV and a few other channels, by Sunday evening it was major interference or no signal on all channels. I did a full rescan and lost all channels, my tv could not pick up signal from any. Since then I have periodically manually and autoscanned and have managed to recover most of my channels except for channel 21 which includes UTV, Channel 5, ITV2 etc. Is this just a result of recent engineering and could I expect to recover these channels if I continue manually searching for channels on channel 21?
I'm in BT38 area.
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Samantha's: mapS's Freeview map terrainS's terrain plot wavesS's frequency data S's Freeview Detailed Coverage
P
PJH3:23 PM
If your Divis aerial is diplexed with an RTE aerial just make sure you're not picking up Carnmoney Hill off the side of the beam Samantha. Have a look in the 800's just to see if UTV etc. is there.
This does happen on an initial scan on some of my boxes (even though Divis is the stronger signal) and if you're experiencing this (Carnmoney Hill would be fairly weak in your area) you may have to do a manual scan to restore the channels such as UTV etc.
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S
Samantha3:50 PM
Carrickfergus
I did check the 800s and nothing there, I've never recieved RTE either so I don't think that's it. When I try to manually scan channel 21 the little box says no signal and the signal meter (good, normal, bad are the increments) is completely blank. Thanks for your reply though :)
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Samantha's: mapS's Freeview map terrainS's terrain plot wavesS's frequency data S's Freeview Detailed Coverage
P
Pauric11:44 PM
Well Kieran Ward, after further manually rescanning Ch 23 and Ch26 it still could not recognised these channels, it looks as though it could be interference with other Tv or mobile masts. Could it be my amplifier is too high !. I probably will get a aerial person to look at it.
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M
Michael11:52 PM
Pauric: Could be interference from Mt Leinster - C23 (490.0MHz) after switchover | ukfree.tv - 11 years of independent, free digital TV advice
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