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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 25/09/2023 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, 250 BBC Red Button, plus 13 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, 109 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! Movies Action, 57 Dave ja vu, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 CBS Reality, 69 HorrorXtra, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 91 WildEarth, 203 CITV, 208 Pop Player, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, plus 16 others

 H -3dB
C26 (514.0MHz)528mDTG-850,000W
Channel icons
 Smithsonian Channel, 11 Sky Arts, 17 Really, 19 Dave, 31 E4 Extra, 36 pick, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 60 Drama +1, 70 Quest +1, 71 That's 60s, 74 Yesterday +1, 75 That's 70s, 233 Sky News, plus 9 others

 H -3dB
C30 (546.0MHz)528mDTG-850,000W
Channel icons
 Quest Red +1,  Classic Hits, 12 Quest, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 52 GREAT! romance, 73 HobbyMaker, 76 That's 80s, 82 Talking Pictures TV, 83 Together TV, 84 PBS America, 90 Together TV +1, 235 Al Jazeera Eng, plus 19 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.

Monday, 29 October 2012
2:04 PM

Had analogue RTE aerial but now can't tune digital RTE channels Can anyone advise

BT 17 9RX

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Gerry's 1 post GB flag
Dave Lindsay

2:15 PM

Gerry: You may need a Freeview HD receiver to watch Saorview which is the Republic's digital replacement to the RT analogue you received previously. You will use the same aerial as you used before.

If your RT aerial is vertical (elements up/down) and pointing south, then manually tune to UHF channel 52. You may find that it picks it up, but doesn't show a picture. If this is the case then you need a Freeview HD receiver, or of course a Saorview receiver will do the trick.

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Dave Lindsay's 5,724 posts GB flag
8:32 PM

Hi Dave and Carl

I haven't done anything with the aerial but rescaned the channels on the I-Can box last night and I now I can see TG4, RTE 1, RTE 2 on 51, 52 and 53 respectively on the EPG. I can also see what programmes are on using the EPG but I have no picture or sound. Any thoughts?

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Sinead's 5 posts GB flag

9:24 PM


Sounds like your down to two options either the box is bad or its a signal issue. You could take the box to your friends and plug it in there to prove the box is working correctly that would rule that one out.

It is a case of having to rule it out.

If your aerial has been up for quite a while it may be an old Group A type which cuts off at channel 37 and the NIMM (RTE Black Mountain) is transmitted on channel 39 which is the Group K type which picks up to channel 48. But I would check the box first.

The customer who I was out with got a second I Can box which again would not even let you into the menu.

hopefully this helps.

Regards Carl

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Carl's 51 posts GB flag
Carl's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage
10:51 PM

Thanks Carl, learning so much about TVs since the DSO. The box has worked in another friends house and they picked up RTE with it. If RTE is showing on 51, 52 and 53 does that mean that my aerial is the K class?

I also have another couple of friends with the I-Can box, one of them could not access the menu or EPG however when they pressed the DISP buttom and moved from 1080p to 560p they could access the menu, maybe this might work for your client.

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Sinead's 5 posts GB flag
m collins
11:16 PM

thanks for explaining.

I have identified my problem: my recorder is a 'free sat' box not 'free view'.
(On the auto scan it did not pick up RTE.
However when I scanned for ' other dishes' , I think, it did show RTE as a 'pay for' channel and that it was encrypted.)

I need to purchase a recorder which has a free view tuner to get over the problem.

M Collins

M Collins

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m collins's 2 posts GB flag
m's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
Tuesday, 30 October 2012

9:39 AM


Thanks for the box info I will remember that one.

Hard to say, if it was put up a couple of years ago I would expect it to be Gp K (ch21 - 48)or a wideband (ch21 - 69) type which would be fine.

If its very old then it could be a Gp A (ch21 - 37)which is struggling to pull channel 39 in.

Think you will need someone out on this one.

Can't think of anything else.

Regards Carl

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Carl's 51 posts GB flag
Carl's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage

9:46 AM

M Collins

The RTE you picked up is the Sky transmittion which requires a card.

Dont forget the box needs to be Freeview HD not just Freeview.

Recording boxes are easy to get at the mitute, non recording seem to be selling out quickly.

Regards Carl

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Carl's 51 posts GB flag
Carl's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage
Wednesday, 31 October 2012
1:26 AM


May I ask. Why I receiving these Muxes on wrong frequencies.
Mux D3+4 is on C42(642.0MHz) and isn't on C21(474.2MHz).
And Mux BBCA is on C45(666.0MHz) and isn't on C27(522.0MHz).

Regards Peter (54.6054,-5.9849) 

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Peter's 7 posts GB flag
Dave Lindsay

4:23 AM

Peter: Because you're receiving them from Black Mountain and not Divis!

Black Mountain is a Public Service relay which means that it doesn't transmit the Commercial (COM) channels which are SDN, ArqA and ArqB.

Divis is on a bearing 280 degrees and your aerial will be horizontal. Black Mountain is at 232 degrees and your aerial will be vertical.

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Dave Lindsay's 5,724 posts GB flag
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