menuMENU    UK Free TV logo Freeview



Click to see updates

Full Freeview on the Divis (Northern Ireland) transmitter

first published this on - UK Free TV
sa_streetviewGoogle Streetviewsa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps54.607,-6.009 or 54°36'24"N 6°0'34"Wsa_postcodeBT17 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 20/05/2024 Pixelation or flickering on some or all channels Digital tick

Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name

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.

 H max
C27 (522.0MHz)551mDTG-100,000W
Channel icons
1 BBC One (SD) Northern Ireland, 2 BBC Two Northern Ireland, 9 BBC Four, 23 BBC Three, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, plus 14 others

 H max
C21+ (474.2MHz)551mDTG-100,000W
Channel icons
3 UTV (SD) (UTV), 4 Channel 4 (SD) NI ads, 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 NI ads, 18 More4, 26 ITV4, 28 ITVBe, 30 E4 +1, 35 UTV +1 (UTV),

 H max
C24 (498.0MHz)551mDTG-100,000W
Channel icons
46 5SELECT, 101 BBC One HD Northern Ireland, 102 BBC Two HD Northern Ireland, 103 UTV HD (UTV), 104 Channel 4 HD NI ads, 105 Channel 5 HD, 106 BBC Four HD, 107 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

 H -3dB
C23 (490.0MHz)551mDTG-850,000W
Channel icons
20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 38 Channel 5 +1, 41 Legend, 42 GREAT! action, 57 Dave ja vu, 58 ITV3 +1, 59 ITV4 +1, 64 Blaze, 67 TRUE CRIME, 68 TRUE CRIME XTRA, 78 TCC, 81 Blaze +1, 83 Together TV, 91 WildEarth, 93 ITVBe +1, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, 267 Al Jazeera English, plus 30 others

 H -3dB
C26 (514.0MHz)528mDTG-850,000W
Channel icons
11 Sky Mix, 17 Really, 19 Dave, 31 E4 Extra, 36 Sky Arts, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 60 Drama +1, 65 That's TV 2, 70 Quest +1, 74 Yesterday +1, 75 That's 90s, 233 Sky News, plus 11 others

 H -3dB
C30 (546.0MHz)528mDTG-850,000W
Channel icons
12 Quest, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 52 GREAT! romance, 56 That's TV (UK), 63 GREAT! romance mix, 71 That’s 60s, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 235 Al Jazeera Eng, plus 18 others

 H -13dB
C36 (594.0MHz)528mDTG-125,000W
Channel icons
from 29th September 2014: 7 NvTv,

 H -40dB
C48 (690.0MHz)551mDTG-10W
Channel icons
from 4th September 2019: 53 TG4, 54 RTÉ One, 55 RTÉ Two,

DTG-8 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?

regional news image
BBC Newsline 0.6m homes 2.5%
from Belfast BT2 8HQ, 1,044km northeast (51°)
to BBC Northern Ireland region - 46 masts.
regional news image
UTV Live 0.6m homes 2.5%
from Belfast BT7 1EB, 1,044km northeast (51°)
to UTV region - 46 masts.

Are there any self-help relays?

Chapel FieldsTransposerCentral Belfast61 homes

How will the Divis (Northern Ireland) transmission frequencies change over time?

1950s-80s1984-971997-981998-20122012-134 Mar 2020

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

Oct 1959-May 2006Ulster Television
May 2006-Dec 2014UTV plc
Feb 1983-Dec 1992TV-am•
Jan 1993-Sep 2010GMTV•
Sep 2010-Dec 2014ITV Daybreak•
• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only. Divis was not an original Channel 3 VHF 405-line mast: the historical information shown is the details of the company responsible for the transmitter when it began transmitting Channel 3.

Friday, 8 November 2013

11:53 PM

PaulN : Although you have now rectified your problem, but purely for info purposes transformers used in boosters etc are all fitted with miniature thermal fuses strapped to the outer windings on the primary side of the transformer and are usually covered by a layer of tape.

All you might notice is a small lump under the outer covering of the primary windings.

link to this comment
jb38's 7,179 posts GB flag
Saturday, 9 November 2013

6:51 PM

That's interesting cos is there is a wee layer of tape on there. Everyday a school day ! Cheers

link to this comment
PaulN's 39 posts GB flag

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.

link to this comment
MikeP's 3,056 posts GB flag
Sunday, 10 November 2013

7:19 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.

link to this comment
PaulN's 39 posts GB flag

9:33 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.

link to this comment
jb38's 7,179 posts GB flag
Wednesday, 13 November 2013
11:54 PM

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

link to this comment
Pauric's 4 posts IE flag
Thursday, 14 November 2013
P. Kieran Ward

11:38 PM

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

link to this comment
P. Kieran Ward's 89 posts GB flag
P.'s: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
Monday, 18 November 2013
2:46 PM

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.

link to this comment
Samantha's 3 posts NO flag
Samantha's: mapS's Freeview map terrainS's terrain plot wavesS's frequency data S's Freeview Detailed Coverage

3:23 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.

link to this comment
PJH's 240 posts GB flag
3:50 PM

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 :)

link to this comment
Samantha's 3 posts NO flag
Samantha's: mapS's Freeview map terrainS's terrain plot wavesS's frequency data S's Freeview Detailed Coverage
Select more comments

Your comment please
Please post a question, answer or commentIf you have Freeview reception problems before posting a question your must first do this Freeview reset procedure then see: Freeview reception has changed, Single frequency interference, and Freeview intermittent interference.

If you have no satellite signal, see Sky Digibox says 'No Signal' or 'Technical fault'

If you have other problems, please provide a full (not partial) postcode (or preferably enter it in box at the top right) and indicate where if aerial is on the roof, in the loft or elsewhere.

UK Free TV is here to help people. If you are rude or disrespectful all of your posts will be deleted and you will be banned.

Privacy policy: UK Free Privacy policy.