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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-3100,000W
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-3100,000W
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-6100,000W
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
12 Quest, 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 Player, 211 Ketchup TV, 212 YAAAS!, plus 15 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
 FreeSports, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 71 Quest Red +1, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 91 Classic Hits, 235 Aljazeera English, plus 18 others

LBT
 H -13dB
C30 (546.0MHz)528mDTG-125,000W
Channel icons
from 29th September 2014: 7 NvTv,

com7
 H -9.1dB
C55 (746.0MHz)551mDTG-612,400W
Channel icons


NIMM
 H -40dB
C48 (690.0MHz)551mDTG-10W
Channel icons
from 4th September 2019: 53 TG4, 54 RTÉ One, 55 RTÉ Two,

DTG-3 64QAM 8K 2/3 24.1Mb/s DVB-T MPEG2
DTG-6 256QAM 32KE 2/3 40.2Mb/s DVB-T2 MPEG4
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
Sunday, 25 March 2012
P
Peter Henderson
sentiment_satisfiedSilver

12:27 AM

Indeed KMJDerby, hopefully.

Can't figure out why, pre DSO, Calbeck had Freeview ERPs of 10 and 3.2 KW while Divis is restricted to 2.3 and 1.6 kw. Even 10 kw would make a big difference here.

It's a real pity Carnmoney Hill (the nearest transmitter to me) is Freeview Lite post DSO as well.

Hopefully, Caldbeck wont be a problem here after the power increase at Divis. Even 50 kw should make a big difference. .

link to this comment
Peter Henderson's 240 posts GB
Monday, 26 March 2012
M
MikeW
12:02 PM

Has anyone noticed reception dropping in the last week for Mux2 Chans (UTV,Ch4, Ch5 etc), while all other Muxs & Chans remain full strength? Is there current maintenance?
My wife has complained about "No signal" for half of Corry and Titanic!

link to this comment
MikeW's 1 post GB
T
Terry Gaut
1:48 PM
Coventry

I live in a block of 11 flats,where we share a communial ariel,all new equipment fitted in each home and a new ariel fitted to the roof, for the digital change over.
There have been very few problems until the past week,when we have lost signal for up to 5hrs a day,since the sun has been shining.
Between 10.00a.m and 3.00p.m and a hour later since the clocks were put forward.
Any advice,please?

link to this comment
Terry Gaut's 1 post GB
P
Peter Henderson
sentiment_satisfiedSilver

5:47 PM

Mike W/Terry Gaut: See my previous posts.

It's all due to conditions. Caldbeck is bombing in here today so obviously that's the problem (Caldbeck shares a number of frequencies with Divis).

You'll just have to wait until this high pressure disappears.

Hopefully, this kind of thing wont happen after 24th October when Divis has a massive power increase to 100/50 kw. Current ERP levels are only a measly 2.3/1.6 kw.

link to this comment
Peter Henderson's 240 posts GB
Wednesday, 28 March 2012
J
Jordy
sentiment_satisfiedGold

10:49 AM

Caldbeck was swamping Divis in parts of Lisburn yesterday afternoon...

Peter i wouldn't worry about Carnmoney being Freeview Lite in a few years time all Tx's will be down to 3 psb multiplexs if what is being proposed goes ahead. Ofcom have postponed the 600mhz auction as the DTT allocations are to be used for mobile services this has been agreed at a world conference.
In a nutshell the death of tv in a terrestrial format has begun, if they close the c/d group and force over 40% of the countries transmitters to be retuned, transmitters such as Mendip. Winter Hill, Limavady, Huntshaw to name a few requiring aerial changes. It would be utter chaos...

link to this comment
Jordy's 1,827 posts GB
Sunday, 8 April 2012
P
Peter Henderson
9:15 PM

Well, hopefully it wont happen Jordy.

Would be money in Sky's pocket if it did.

link to this comment
Peter Henderson's 7 posts GB
Tuesday, 10 April 2012
Transmitter engineering
sentiment_very_satisfiedOwner

10:29 AM

DIVIS transmitter - Over the next week Divis main transmitter: TV (analogue) working normally, TV (digital) working normally, Radio (analogue) working normally, Radio (digital) working normally. [DUK]

link to this comment
Transmitter engineering's 138,015 posts xx
Transmitter engineering
sentiment_very_satisfiedOwner

10:29 AM

DIVIS transmitter - Over the next week Divis main transmitter: TV (analogue) working normally, TV (digital) working normally, Radio (analogue) working normally, Radio (digital) working normally. [DUK]

link to this comment
Transmitter engineering's 138,015 posts xx
Thursday, 12 April 2012
L
LEONARD BRETT
2:21 PM

will I be able to pick up freeview from a 64
element antenna mounted in my roofspace
postcode BT196BA
thanks

link to this comment
LEONARD BRETT's 1 post GB
Friday, 13 April 2012
Transmitter engineering
sentiment_very_satisfiedOwner

6:30 PM

DIVIS transmitter - Analogue BBC ONE Weak Signal from 14:45 today BBC TWO Weak Signal from 13:55 today to 14:10 today [BBC] Over the next week Divis main transmitter: TV (analogue) working normally, TV (digital) working normally, Radio (analogue) working normally, Radio (digital) working normally. [DUK]

link to this comment
Transmitter engineering's 138,015 posts xx
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