Full Freeview on the Divis (Northern Ireland) transmitter

Brian Butterworth first published this on 1st May 2004 at 08:20 - UK Free TV

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54.607,-6.009 or 54°36'24"N 6°0'34"W

BT17 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.

Mux	H/V	Frequency	Height	Mode	Watts
PSB1 BBCA	H max	C27 (522.0MHz)	551m	DTG-	100,000W
	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)	551m	DTG-	100,000W
	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)	551m	DTG-	100,000W
	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 66 TBN UK,
COM4 SDN	H -3dB	C23 (490.0MHz)	551m	DTG-8	50,000W
	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)	528m	DTG-8	50,000W
	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)	528m	DTG-8	50,000W
	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)	528m	DTG-12	5,000W
	from 29th September 2014: 7 NvTv,
NIMM	H -40dB	C48 (690.0MHz)	551m	DTG-	10W
	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?

BBC Newsline 0.6m homes 2.5%
from Belfast BT2 8HQ, 1,044km northeast (51°)
to BBC Northern Ireland region - 46 masts.

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 Fields

Transposer

Central Belfast

61 homes

How will the Divis (Northern Ireland) transmission frequencies change over time?

	1950s-80s	1984-97	1997-98	1998-2012	2012-13	4 Mar 2020
	VHF	A K T	A K T	A K T	K T	W T
C1	BBCtv_waves
C21		C4_waves	C4_waves	C4_waves	+D3+4	D3+4
C23					SDN	SDN
C24		ITV_waves	ITV_waves	ITV_waves	BBCB	BBCB
C26					ArqA	ArqA
C27		BBC2_waves	BBC2_waves	BBC2_waves	BBCA	BBCA
C29					ArqB
C30						LBT
C31		BBC1_waves	BBC1_waves	BBC1_waves
C33						com7
C34						com8
C36						_local
C48					NIMM	NIMM
C55_{tv_off}						com7_{tv_off}
C56_{tv_off}						COM8_{tv_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

Local transmitter maps

Divis Freeview Divis DAB Divis TV region BBC Northern Ireland UTV

Which companies have run the Channel 3 services in the Divis transmitter area

Oct 1959-May 2006	Ulster Television
May 2006-Dec 2014	UTV plc

Feb 1983-Dec 1992	TV-am•
Jan 1993-Sep 2010	GMTV•
Sep 2010-Dec 2014	ITV 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.

Is the transmitter output the same in all directions?

P

Peter Henderson

_{sentiment_satisfied}Silver

11:20 PM

I've no idea what you're talking about Chris.

The proposed RTE mini mux will broadcast from the at , not .

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Peter Henderson's 240 posts GB flag

J

JOHN
7:51 PM

When northern goes in October 2012 will rte be available on - i cannot currently obtain rte on Freeview.

my current digital TV has mpeg4

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JOHN's 1 post GB flag

Briantist

_{sentiment_very_satisfied}Owner

8:19 PM

JOHN: You will still need a box, as the service will be broadcast using DVB-T2 .

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Briantist's 38,915 posts GB flag

P

Peter Henderson

_{sentiment_satisfied}Silver

8:59 PM

"WHEN NORTHERN GOES IN OCTOBER 2012 WILL RTE BE AVAILABLE ON FREEVIEW - I CANNOT CURRENTLY OBTAIN RTE ON FREEVIEW.

MY CURRENT DIGITAL TV HAS MPEG4"

The proposed mini RTE mux will broadcast from transmitters at , , and .

After 24th October 2012, from clermont cairn will have the null to the north removed and many areas that currently receive transmissions only, should get a decent from Saorview. Note that Clermont Cairn Saorview transmissions also change from channel 53 to 52 on that date.

Brian: I'm not sure if this is the case with Saorview as I was led to believe the SD transmissions were simply MPEG4 and could be received by an MPEG4 capable (e.g. the Picnic box). I'm not sure if the proposed NI mini mux conform to these standards.

You are correct that a UK box will receive Saorview. However, there could be EPG issues, and I've read elsewhere that one box (the new Technisat) has problems with RTE (but not the others). There should be no such issues with the NI mini mux as the EPG will conform to UK Frreeview standards.

If you are out of range of the NI min mux or border transmitters John, your only other solution is Saorsat, or a .

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Peter Henderson's 240 posts GB flag

Briantist

_{sentiment_very_satisfied}Owner

9:26 PM

JOHN : I have added a page at Northern Ireland "mini multiplex" (NIMM) | ukfree.tv - independent free digital TV advice with the details.

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Briantist's 38,915 posts GB flag

Briantist

_{sentiment_very_satisfied}Owner

9:30 PM

Peter Henderson: is MPEG4 on DVB-T, and can be watched by some equipment, most notably BT Vision boxes.

will display Saorview.

Freeview HD boxes are expected to be able to deal with the cross-border EPG issues, as there is a section in the specification dealing with this.

Anyway, more at Northern Ireland "mini multiplex" (NIMM) | ukfree.tv - independent free digital TV advice .

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Briantist's 38,915 posts GB flag

C

Carl

_{sentiment_satisfied}Bronze

6:45 PM

Hi, Im an installer in Antrim and recently Ch23 Mux seems to be having major problems with BER. The and level looks fine on the spectrum anaylizer however the of the signal is bad. Can this be looked at as I have customers and queries regarding this issue. I have noticed this myself over the last few week the areas are BT41, BT42.

Cheers

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Carl's 51 posts GB flag

P

Peter Henderson

_{sentiment_satisfied}Silver

8:41 PM

I've had similar issues Carl. Thought it was just myself affected.

All I can say is roll on October 24th when all of this should be a thing of the past.

Incidentally, my strongest on is 34 which, strangely, is one of the lower multiplexes

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Peter Henderson's 240 posts GB flag

C

Carl

_{sentiment_satisfied}Bronze

10:38 PM

To add to my last post this problem also extends to as well so there is a problem either with the or the Mux! if 23 is to be used on I would look again

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Carl's 51 posts GB flag

P

Peter Henderson

_{sentiment_satisfied}Silver

12:51 AM

It should be fine after , hopefully Carl, as the increases to 50kw.

My issues are also to do with the of the signal. I'm in BT 37 (Jordanstown) and up until recently 23 was OK, although a bit weaker than the rest.

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Peter Henderson's 240 posts GB flag

Page 11

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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