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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, 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
Saturday, 27 October 2012
J
john boyd
10:19 PM

What strength of attenuator would i need,Carl says a 20db attenuator will probably solve it ?

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john boyd's 6 posts GB flag
Dave Lindsay
sentiment_very_satisfiedPlatinum

10:27 PM

john boyd: Variable ones are available, such as (other models and suppliers are available, this is one example):

TV Aerial Attenuator Variable 0-20Db Freeview Digital | eBay

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Dave Lindsay's 5,724 posts GB flag
C
Carl
sentiment_satisfiedBronze

10:34 PM
Belfast

John

An attenuator will only solve a problem if the signal is overloading your TV or box tuner.

You will not need to turn the signal down on RTE from the South.

Your issue appears to be that your equipment is unable to decode the picture. Given that you were getting good analogue signals from the South it sounds like you require a Freeview HD box with the FREEVIEW HD logo to work

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Carl's 51 posts GB flag
Carl's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage
C
Carl
sentiment_satisfiedBronze

10:40 PM
Belfast

John

I should also mention that a FREEVIEW HD box is DVB T2 which means it will decode Freeview, Saorview and the RTE multiplex from Black Mountain. In otherwords these boxes cover everything.

Hopefully that makes things a bit clearer.

Carl

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Carl's 51 posts GB flag
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C
Carl
sentiment_satisfiedBronze

10:59 PM
Belfast

John

Please disregard the last two posts I confused you with another issue.

The signal at the moment is very strong now and given your area a 12 or 20db attenuator should be fine or indeed a variable one from 0 - 20db.

Regards Carl

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Carl's 51 posts GB flag
Carl's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage
J
john boyd
11:15 PM

Thanks for your help, I should have said i have sd box but will try A variable attenuator, Carl is there a problem with c21 over loading freeview boxes I see that Elaine in Lisburn and kdm in Newtownards have the same problem, I live Mallusk.

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john boyd's 6 posts GB flag
Sunday, 28 October 2012
C
Carl
sentiment_satisfiedBronze

1:51 AM
Belfast

John

There shouldnt be a problem with one channel effecting the rest.

Channels now transmitting 100,000 Watts and 50,000 Watts there is very little difference in real signal power.

UHF signals work on line of sight therefore the transmitters are located on the highest locations. They cannnot travel through rock or mountain no matter what the power increase is, so the key question is pre DSO were you and they getting normal signal?

If you were getting a normal working signal from Freeview and the problem occurred when the switchover happened then I would say yes attenuate or lower the signal. If the latter then you would need your signal looked at to see if you can receive it.

Without putting a spectrum analyzer on its difficult to say.

Regards Carl


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Carl's 51 posts GB flag
Carl's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage
J
john boyd
12:02 PM

freeveiw was ok pre switchover will try an attenuator,thanks for your help


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john boyd's 6 posts GB flag
Monday, 29 October 2012
G
Gerry
2:04 PM

Had analogue RTE aerial but now can't tune digital RTE channels Can anyone advise

BT 17 9RX

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Gerry's 1 post GB flag
Dave Lindsay
sentiment_very_satisfiedPlatinum

2:15 PM

Gerry: You may need a Freeview HD receiver to watch Saorview which is the Republic's digital replacement to the RT analogue you received previously. You will use the same aerial as you used before.

If your RT aerial is vertical (elements up/down) and pointing south, then manually tune to UHF channel 52. You may find that it picks it up, but doesn't show a picture. If this is the case then you need a Freeview HD receiver, or of course a Saorview receiver will do the trick.

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Dave Lindsay's 5,724 posts GB flag
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Your comment please
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.

If you have no satellite signal, see Sky Digibox says 'No Signal' or 'Technical fault'

If you have other problems, please provide a full (not partial) postcode (or preferably enter it in box at the top right) and indicate where if aerial is on the roof, in the loft or elsewhere.

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