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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.

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.

MuxH/VFrequencyHeightModeWatts
PSB1
BBCA
 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

PSB2
D3+4
 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, 30 E4 +1, 35 UTV +1 (UTV),

PSB3
BBCB
 H max
C24 (498.0MHz)551mDTG-100,000W
Channel icons
56 5SELECT, 101 BBC One HD Northern Ireland, 102 BBC Two HD (England), 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

COM4
SDN
 H -3dB
C23 (490.0MHz)551mDTG-850,000W
Channel icons
20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 41 Legend, 42 GREAT! movies action, 46 Channel 5 +1, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 CBS Reality, 74 Dave ja vu, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 203 CITV, 208 POP MAX, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, plus 14 others

COM5
ArqA
 H -3dB
C26 (514.0MHz)528mDTG-850,000W
Channel icons
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, 57 Smithsonian Channel, 60 Drama +1, 70 Quest +1, 75 Yesterday +1, 83 Together TV, 233 Sky News, plus 9 others

COM6
ArqB
 H -3dB
C30 (546.0MHz)528mDTG-850,000W
Channel icons
12 Quest, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 71 Quest Red +1, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 88 Classic Hits, 235 Al Jazeera Eng, plus 19 others

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

NIMM
 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
VHFA K TA K TA K TK TW T
C1BBCtvwaves
C21C4wavesC4wavesC4waves+D3+4D3+4
C23SDNSDN
C24ITVwavesITVwavesITVwavesBBCBBBCB
C26ArqAArqA
C27BBC2wavesBBC2wavesBBC2wavesBBCABBCA
C29ArqB
C30LBT
C31BBC1wavesBBC1wavesBBC1waves
C33com7
C34com8
C36_local
C48NIMMNIMM
C55tv_offcom7tv_off
C56tv_offCOM8tv_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

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.

Comments
Wednesday, 31 October 2012
P
Peter
1:33 PM

Dave

I see. It is bad news for me. Anyway I am now wiser. Thank you for explanation.

Regards Peter (54.6054,-5.9849) 

link to this comment
Peter's 7 posts GB
Friday, 2 November 2012
T
Tony
10:42 PM

Hi i have a Samsung PS50A457P1 with built in Free-view, it picks up UK tv but says 'HD not supported' for all the Irish stations. I also have a Sony Bravia and it shows them no problems, any ideas?
BT32 5HB

Tony

link to this comment
Tony's 1 post GB
Dave Lindsay
sentiment_very_satisfiedPlatinum

11:08 PM

Tony : That Samsung set cannot receive Freeview HD signals which use DVB-T2 mode. If you are receiving the Irish channels from Black Mountain then this also uses DVB-T2 mode, even though the pictures are standard definition.

Alternatively, if you are receiving the channels directly from one of the Republic's transmitters, then these use DVB-T, but Saorview pictures use MPEG4 format. (Freeview standard definition pictures use the earlier MPEG2 format.)

The information about this model is here:

Support for PS50A457P1D

Page 2 of the manual says "Any functions related to Digital TV (DVB) will only work in countries or areas where DVB-T (MPEG2) digital terrestrial signals are broadcasted."

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Dave Lindsay's 5,724 posts GB
Saturday, 3 November 2012
F
Fergus Maunsell
6:34 PM

I got my I Cam HD Box today in the post to get RTE and TG4 at Belfast BT9 6TZ

After few hours trying to set the 4 digit code for the I can remote control for my Samsung TV, I got all HD and SD plus radio working.

One error is only on Irish channel TG4 is showing 3:4 screen size not 16:9 RTE 1 and 2 showing 16:9

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Fergus Maunsell's 6 posts GB
Sunday, 4 November 2012
P
Padraig
12:59 PM

Hi I am using a tv Star box for Saorview and Freeview channels from the Davis transmitter I live in co Meath I am getting the 5 Multiplex's but CH23 is very weak while all the rest are 100% any Ideas anyone

link to this comment
Padraig's 1 post IE
Dave Lindsay
sentiment_very_satisfiedPlatinum

1:07 PM

Padraig: C23 is used by Mount Leinster, so this may cause you difficulty.

link to this comment
Dave Lindsay's 5,724 posts GB
R
Ronan
3:46 PM

Is it be possible to recieve Divis from Dun Leary South Dublin using a group A yagi with a masthead amp etc or have you heard any reception reports from this area ...

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Ronan's 17 posts IE
Tuesday, 6 November 2012
D
David Irwin
9:07 AM

hello I live just south of the border in Jenkinstown, I get the BBC channels on CH45 666mhz but the UTV/ITV channels are coming in on CH 39 618mhz, I cant find any transmitter on the map that brodcasts this combination, having said that, I can only get the UTV/ITV channels with the help of a masthead amp, on my normal chimney mounted aerial all I'm getting is the BBC channels, I wanted to locate the appropriate transmitter before upgrading my aerial/amp so that I had the correct type of aerial, can anyone help please?

link to this comment
David Irwin's 1 post IE
Dave Lindsay
sentiment_very_satisfiedPlatinum

10:23 AM

David Irwin: I can't find a transmitter that uses C39 for PSB2 (UTV/C4 etc) either. I checked the Digital UK Postcode Checker and the Ofcom Tech Guidance document and they both bear out what I've put below:
http://stakeholders.ofcom….pdf

In your general area there are two relays that each use the same three channels, albeit with PSB1 and PSB3 swapped:

- Kilkeel: PSB1=C45 PSB2=C42 PSB3(HD)=C39
- Rostrevor: PSB1=C39 PSB2=C42 PSB3(HD)=C45

So you are receiving from Kilkeel. Rostrevor is 23W and Kilkeel is 400W. Perhaps you should probably re-orientate your aerial to the latter.

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Dave Lindsay's 5,724 posts GB
J
John Durrell
12:55 PM
Coleraine

Hi,
Sorry for such a long post. I had originally posted this message on the Limavady transmitter site but am now pretty sure that our signal comes from Divis, but not 100% sure.

Since the N.Ireland switch over I can receive all the HD channels but in 1080i. My neighbour about 150 yards away can receive in 1080P (when channels are being broadcast in 1080P). I live in Ringsend not far from Limavady (10 miles) but I think (not sure) that my signal comes from Divis as we have a mountain in between us and Limavady. I have an i-Can HD set-top box running a Sharp Aquos, I have tried this box at my neighbours it gets 1080P there running through his Sony Bravia . My aerial was a Yagi type high gain red plastic bung. I was getting a signal strength of 65% same as my neighbour. I then tried a Philex 27887D SLx 32 Element Digital Wideband black plastic bung. This aerial made no difference except the signal strength was slightly lower at 62%. Both my neighbour and I use a SLx 8 way distribution box to feed the signal around the house. I have also tried by bypassing the distributor with no difference. My question is why can I not receive 1080P? Am I using the wrong aerial? Do I need an aerial with more elements or am I missing a trick somewhere else.

My reasoning for thinking that there are sometimes1080p transmissions (BBC HD seems to have the most) and that the i-Can box is OK for their reception is based on the tests I carried out below.

1) I tried the same i-c an HD box in London (Crystal Place Transmitter) on a Sony Bravia, it reported 1080P. The Sony set also has its own HD tuner which reports 1080P.
2) Tried the same box at neighbours in Ringsend on different Sony Bravia it also reported 1080P. This set also has its own HD tuner and it reports 1080P.
3) My Sharp Aquos plays Blurays in 1080P via HDMI.
4) However the i-Can HD box through HDMI can only sustain 1080i on this TV.
5) The i-Can has a setting to change the output and when I set it to1080P it cannot sustain the picture and sound. It will come on for a few seconds reporting 1080P and then the screen will go blank for a further few seconds. If the two Sony's are falsely reporting 1080P then that solves the issue. However if the broadcast is in 1080P then I wonder why I can't get it? Is it the aerial?
If anyone can verify that Divis is my transmitter and that indeed 1080P is being transmitted that would be very helpful. If this is the case it seems that both aerials cant sustain 1080P and therefore would a wideband aerial with more elements do the trick? Any suggestions would be much appreciated.


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John Durrell's 4 posts GB
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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.

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