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Full Freeview on the Divis (Northern Ireland) transmitter

first published this on - UK Free TV
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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.

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 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 TRUE CRIME, 68 TRUE CRIME XTRA, 78 TCC, 81 Blaze +1, 83 Together TV, 89 ITV4 +1, 91 WildEarth, 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), 61 GREAT! movies extra, 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.

Monday, 2 September 2019
P. Kieran Ward

9:41 PM

Re: the move for Com 6 and Com 7 from UHF 33 and 34 to UHF 51 and 60, and then next year the move to UHF 52 and 56. Where are the two Saorview multiplexes from the Saorview Transmitter on Clermont Carn Co. Louth which are currently transmitting on UHF 52 and 56 moving to? I have emailed RT asking this question but to date they have not replied!

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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

10:16 PM

P. Kieran Ward : have to say the lack of information about this is shocking! From what I can gather yes that's the case with com7,8. Apparently RTE will be broadcasting in the 40s somewhere come March. Which means every Freeview/RTE rig is going to have to be totally changed as far as I can see.
I'm struggling if that's the case how you can boost the RTE without overloading Freeview in the 30s area of the band.

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CARL READE's 51 posts GB flag
Tuesday, 3 September 2019
1:28 AM

Currently, I have a wide and aerial for Divis and group CD for RT, both diplexed into one downlead

I've an aerial installer coming tomorrow and he's going to fit a new wideband aerial for Divis and another for Clermont Cairn.

I'm assuming that after this, the PSB muxes and NIMM from Carnmoney Hill will take priority on ant retune on Wednesday, with the other Freeview muxes coming from Divis.

The PSB muxes from Divis, and the NIMM from Black Mountain may or may not be in the 800's along with Saorview.

Digital U.K. are predicting the LBT mux will improve significantly after Wednesday, so I assume it's moving further up the mast.

Portpatrick is also changing from group CD to group A, with Digital U.K. predicting my reception will improve as well.

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PeterH's 3 posts GB flag
Wednesday, 4 September 2019
Transmitter engineering

5:08 AM

DIVIS transmitter - Freeview: BBC Digital TV Off Air; DSO related from 00:01 today, HD Digital TV Off Air; DSO related from 00:01 today. FM: Radio Ulster FM Off Air from 07:10 on 01 Sep to 07:12 on 01 Sep. [BBC]

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Transmitter engineering's 150,379 posts xx flag

7:32 AM


Yes the COMs 7&8 muxes are moving to 51 & 60 today. BUT sometime in Q1 2020 (may not be March, date is TBA as far as I can see) they will be moving to 55 (not 52) & 56 as the rest of the UK where transmitted (not all transmitters broadcast them).
This and the retune event is part of the 700Mhz clearance see…nce.

For Freeview predicted reception use the coverage checker Digital UK - Coverage checker if you have a UK postcode. For Saorview you will probably have to google to get the information.

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Chris.SE's 4,127 posts GB flag
5:11 PM

After yesterday's aerial installation, of which I've spent a considerable amount of money, COM 7 and COM 8 were both perfect along with Saorview on 52 and 56 ( I was getting some break up on COM 7 and 8,; and Saorview mux 2 on 56).

Today, no signal from either COM 7 or COM 8,. Initially, a good signal with a blank screen, but subsequent retunes have shown nothing.


No DTT Through the night, other than Saorview.

Complete and utter shambles.

Despite Digital U.K.'s predictions, reception of the LBT mux hasn't improved significantly at all.

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PeterH's 3 posts GB flag

10:21 PM

PeterH: yes they are there. Was a diplexer fitted as I fitted a Freeview, RTE rig yesterday now having to use an inductive splitter for Divis and Claremont. Another issue now is channel 60 is right beside 4G and I have had a number of people reporting breakup.

To be honest this is a cluster.

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CARL READE's 51 posts GB flag

10:25 PM

PeterH: yes they are there. Was a diplexer fitted as I fitted a Freeview, RTE rig yesterday now having to use an inductive splitter for Divis and Claremont, diplexers are no longer any use now. Another issue now is channel 60 is right beside 4G and I have had a number of people reporting breakup, which will require a filter which is unlikely to solve as they are so close.

To be honest this is a cluster.

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CARL READE's 51 posts GB flag
Thursday, 5 September 2019
1:44 AM

Thanks Carl.

Yes, a duplexer was fitted and I thought this may be the issue. I was thinking of a filter as well.

I did query whether or not two wideband antennas could be diplexed but he assured me this would be fine. Going to give him a ring tomorrow so I'll pass on your suggestion.

I assume if everything is split Divis should come in fine again with the predicted improvement on the LBT mux ?

This has also deteriorated. Was actually receiving it well no break up on a Panasonic PVR, which I think are more sensitive than the Humax boxes.

51 is being received on the Panasonic but on none of my Humax boxes or a BT DTR 4000.

Very disappointed since I spent a fair bit of money getting this sorted and everything was greatb yesterday, but I suppose these things unpredictable.

The day when free to air TV is delivered by high speed broadband and 5G can't come soon enough.

They really should be trying to develop Freesat as well and the Channel 4 HD/All 4 situation is deplorable.

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PeterH's 3 posts GB flag

4:09 AM


Apparently you can get C4 HD on satellite - If you know how to you can tune in C4 HD in non-Freesat mode on:

11127, V, 22000, 5/6, DVB-S, QPSK.

according to All of the free TV channels on PGSTART1160 in the UK | free and easy

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Chris.SE's 4,127 posts GB flag
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