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Freeview Light on the Black Mountain (Northern Ireland) transmitter

first published this on - UK Free TV
sa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps54.586,-6.024 or 54°35'10"N 6°1'28"Wsa_postcodeBT17 0LU


The symbol shows the location of the Black Mountain (Northern Ireland) transmitter which serves 6,600 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 Black Mountain (Northern Ireland) transmitter.

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

Which Freeview channels does the Black Mountain 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.

 V -26dB
C41 (634.0MHz)486mDTG-5W
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

 V -26dB
C44 (658.0MHz)486mDTG-5W
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),

 V -26dB
C47 (682.0MHz)486mDTG-5W
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 max
C33+ (570.2MHz)486mDTG-112,000W
Channel icons
53 TG4, 54 RTÉ One, 55 RTÉ Two,

DTG-11 QPSK 32KN 2/3 10.0Mb/s DVB-T2 MPEG4
H/V: aerial position (horizontal or vertical)

The Black Mountain (Northern Ireland) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: .

If you want to watch these channels, your aerial must point to one of the 80 Full service Freeview transmitters. For more information see the will there ever be more services on the Freeview Light transmitters? page.

Which BBC and ITV regional news can I watch from the Black Mountain 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.

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

1959-80s1984-971997-981998-20122012-134 Sep 2019

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 5 50kW
NIMM≡(-14dB) 2kW
Analogue 1-4(-33dB) 25W
BBCA, D3+4, BBCB(-40dB) 5W

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.

Is the transmitter output the same in all directions?

Radiation patterns withheld

Saturday, 21 February 2015

11:42 AM

john evans: As far as your problem is concerned, maybe you could clarify on the following points.

(1) : If the reason for temporarily moving the aerial involved builders, was it them who actually moved it?

(2) : Were the coax cables disconnected from the aerials before the pole was moved?, or was the whole structure (inc aerials with cables attached) just temporarily moved out of the way?

My only reason for asking being, that my initial suspicion would be along the lines of the problem being caused by a faulty coax to aerial connection, or that the cables have been damaged, because by being located at just under 2 miles away from the high powered Divis transmitter, reception should be possible (in theory) with only a short length of wire (3-4 feet or so) connected directly into the aerial socket (circular middle) of your TV or box. (Black Mountain excluded)

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jb38's 7,179 posts GB flag
Monday, 22 February 2016
Transmitter engineering

11:09 AM

BLACK MOUNTAIN transmitter - Possible service interruptions [DUK]

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Transmitter engineering's 144,075 posts xx flag
Tuesday, 1 March 2016
Transmitter engineering

4:32 AM

BLACK MOUNTAIN transmitter - Possible service interruptions [DUK]

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Transmitter engineering's 144,075 posts xx flag
Monday, 18 April 2016
Transmitter engineering

10:09 AM

BLACK MOUNTAIN transmitter - Possible service interruptions [DUK]

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Transmitter engineering's 144,075 posts xx flag
Tuesday, 26 April 2016
Transmitter engineering

12:09 AM

BLACK MOUNTAIN transmitter - Possible service interruptions [DUK]

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Transmitter engineering's 144,075 posts xx flag
Tuesday, 14 June 2016
Jordan woods
11:52 PM

Can't get keep it country to on channel 87.

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Jordan woods's 1 post GB flag
Wednesday, 15 June 2016
Richard Cooper

8:47 AM

Jordan woods: Hi, Jordan. I explained in a post to Margaret Jones yesterday why this is. I will re-iterate here. 'Keep It Country', channel 87, is now one of a group of channels that you can only watch if you have high definition (HD) receiving equipment. A standard (SD) television or any old tv connected to an (SD) Freeview box is unable to decipher the channel 87 signal into a watchable picture and audible sound. To get 'Keep It Country' nowadays, you need either an HD tv set or an HD-ready tv set plus a Freeview HD set top box. You can get an HD set top box online for 43 plus delivery. I f you do, make sure your tv is HD-ready, has an HDMI connection and that the new Freeview HD box comes with an HDMI lead included. One other thing: you need to be using a transmitter that transmits the 'Keep Country' group of channels, called 'COM 7'. Not all transmitters transmit it, which is why i'm telling you. Hope this all helps, Richard, Norwich, Weds 15th. June at 8:45 a.m.

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Richard Cooper's 466 posts GB flag
Richard's: mapR's Freeview map terrainR's terrain plot wavesR's frequency data R's Freeview Detailed Coverage
Saturday, 23 September 2017
Donald campbell
3:41 AM

Thanks for info. I interested in this sort of stuff.

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Donald campbell's 1 post GB flag
Sunday, 20 October 2019

3:08 PM

Aerial 8-element LP in the roofspace 15m AGL.

RTE (mux 33) appears to have increased its transmitter power recently to at least 100kW. It is giving 100% on
the signal strength bar, compared to 99% for BBCA (21) and B (27).

Anyone any idea how often the listings are updated?

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Denis's 24 posts GB flag
Denis's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage

3:31 PM

Denis: I am referring to the Northern Ireland Minimux NIMM, listed as being from Black Mountain.
All other signals are from Divis, which is the same distance and within 2 degrees direction.

Here in Killyleagh I get signal strengths of:

100kW muxes 98% signal strength from the 100kW muxes
95% from the 50kW muxes (23, 26, 30)
74% from the (stated) 5kW mux (36)
78% from a 12.7kW mux (51)
54% from a 12.7kW mux (60)
The last two are about half the predicted values.

link to this comment
Denis's 24 posts GB flag
Denis's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
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