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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
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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, plus 14 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, 28 ITVBe, 30 E4 +1, 35 UTV +1 (UTV), 71 That’s 60s,

PSB3
BBCB
 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

COM4
SDN
 H -3dB
C23 (490.0MHz)551mDTG-850,000W
Channel icons
20 U&Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 38 Channel 5 +1, 41 Legend, 42 GREAT! action, 57 U&Dave ja vu, 58 ITV3 +1, 59 ITV4 +1, 64 Blaze, 67 TRUE CRIME, 68 TRUE CRIME XTRA, 81 Blaze +1, 83 Together TV, 91 WildEarth, 93 ITVBe +1, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, 251 Al Jazeera English, 255 FRANCE 24 (in English), 265 Rok Sky +1, plus 29 others

COM5
ArqA
 H -3dB
C26 (514.0MHz)528mDTG-850,000W
Channel icons
11 Sky Mix, 17 Really, 19 U&Dave, 31 E4 Extra, 36 Sky Arts, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 60 U&Drama +1, 65 That's TV 2, 70 Quest +1, 74 &UYesterday +1, 76 That's TV 2 MCR, 233 Sky News, plus 13 others

COM6
ArqB
 H -3dB
C30 (546.0MHz)528mDTG-850,000W
Channel icons
12 Quest, 25 U&W, 27 U&Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 52 GREAT! christmas, 56 That's TV (UK), 63 GREAT! romance mix, 73 HobbyMaker, 75 That's 90s, 82 Talking Pictures TV, 84 PBS America, 235 Al Jazeera Eng, plus 18 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, 21 November 2012
P
Peter Henderson
sentiment_satisfiedSilver

12:27 AM

Frank:Some reports of excellent reception of Saorview from Clermont Cairn in the Bangor area on the Boards.ie forum, so I would maybe investigate this especially if you're interested in the full Saorview service without the blocking due to rights restrictions.

Another possibilty is Carnmoney Hill (just across the lough) if you have no joy with Black Mountain.

Strangely, the NI mux from Black Mountain isn't that strong at this location (Jordanstown) despite predictions of good reception on Digital UK's postcode checker, although there's no break up on the signal. Much weaker than the old low power multiplexes from Divis for example, so those couple of miles and a slighly different direction does seem to make quite a difference. My aerial for Divis is a wideband one.

Like Dave, I'm unfamiliar with the box you're using, but if it gets the HD mux then it shouldn't have any problems with either the NI mux or Saorview.

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Peter Henderson's 240 posts GB flag
P
Peter Henderson
sentiment_satisfiedSilver

12:31 AM

P.S. I wouldn't pay too much attention to those Digital UK postcode predictions Frank as they do seem to be somewhat arbitrary.

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Peter Henderson's 240 posts GB flag
Thursday, 22 November 2012
F
Frank
12:40 PM
Bangor

My thanks to Dave Lindsay and Peter Henderson for replying in such great detail. This has provdied me with some more understanding of the possible issues at play. In the meantime I have tested my Freeview HD i-can easy box ata freind's house a half a mile away as I have discovered that my neighbour doesn't receive the BM channel 39 from his FULL HD TV although post checker says he can. On testing at home my box produces no signal on CH39 or any other channel over 29. My aerai is a yagi (looked at your links) which would seem to limit me to these channels unless I try and realign aerial before buying new one. To try Clermont what direction should I aim at? Would this lose me the UK channels or could I still get those? Regards Frank

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Frank's 3 posts GB flag
Frank's: mapF's Freeview map terrainF's terrain plot wavesF's frequency data F's Freeview Detailed Coverage
Friday, 23 November 2012
P
Peter Henderson
sentiment_satisfiedSilver

2:02 AM

Frank: Have a look on this thread on boards.ie.:

http://www.boards.ie/vbul…e=13

There's a mini discussion about Saorview reception from Clermont Cairn in and around Bangor, and a number of locations are mentioned.

Try the Digital UK postcode checker at your location and tick the box marked "detailed view". This should give an indication if reception from the NI mux is possible at your location.

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Peter Henderson's 240 posts GB flag
Wednesday, 28 November 2012
N
Niall Burns
6:36 PM

Is it possible to pick up the signal from Divis in Castlewellan? If so how?

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Niall Burns's 4 posts GB flag
P
Peter Henderson
sentiment_satisfiedSilver

8:19 PM
Newtownabbey

Niall:According to Digital UK's postcode checker, the answer is no.

However, I wouldn't treat that as gospel. Have a look and see if there are any Divis aerials in the village. These will probably be quite large and horizontally polarised. I assume you're currently receiving signals from the Newcastle transmitter Niall?



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Peter Henderson's 240 posts GB flag
Peter's: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
Dave Lindsay
sentiment_very_satisfiedPlatinum

8:24 PM

Niall Burns: Divis uses only Group A channels, so use a Group A aerial rather than a wideband one which isn't as efficient for Group A channels:

Digital TV Transmitters

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Dave Lindsay's 5,724 posts GB flag
Thursday, 29 November 2012
P
Peter Henderson
sentiment_satisfiedSilver

12:23 AM
Newtownabbey

Judging by what I can view on streetview Dave, there aren't any Divis aerials at all in the village. I notice Quite a few aerials for Clermont Cairn though, so Saorview shouldn't be a problem.

Niall might be better off going down the Freesat route.

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Peter Henderson's 240 posts GB flag
Peter's: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
N
niall burns
8:50 AM
Castlewellan

The reason I ask is because the signal from the newcastle transmitter is so poor. On tuesday I couldnt even watch tv at all, it kept coming up no signal and was doing the same quite a bit yesterday. The aerial is on the roof and also attempted changing it to leitrim transmitter but its the same problem. I have spent £150 to get freeview, from a new tv to set top boxes (a hd one to get rte).

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niall burns's 4 posts GB flag
niall's: mapN's Freeview map terrainN's terrain plot wavesN's frequency data N's Freeview Detailed Coverage
Dave Lindsay
sentiment_very_satisfiedPlatinum

10:52 AM

Peter Henderson: The Streetview photos were taken in 2008 before switchover. I think that we can safely say that the pre-switchover digital signals would not have been available at Niall's location. It is perhaps also highly doubtful that the Black Mountain analogue Channel 5 signal would also have been available. So even if the four analogue channels could have been received from Divis, then this would have provided nothing extra over that of Newcastle.

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Dave Lindsay's 5,724 posts GB flag
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