Freeview: Northern Ireland "mini multiplex" (NIMM) | Switchovers
My UK Free TV settings
For an enhanced Freeview reception
prediction please enter your
full postcode, a national grid reference or
a UK latitude and longitude pair.
 
Most popular LIVE 13:13
Live updates LIVE 13:13
Trends|Faults/Engineering|Box updates
Benagh
TV Off Air from 09:02 today, HD ...
Clettraval
TV Off Air from 14:03 on 27 Sep ...
Cwmafon
TV Off Air from 22:34 yesterday ...
Idle
TV Off Air from 10:10 today, HD ...
Pontop Pike
DAB: BBC National DAB Radio Weak ...
UK Free IconMap of transmitters with faults or engineering
William Hepburn Worldwide Tropospheric Ducting Forecasts Atmosphere interference maps
Twitter LIVE 13:13

Briantist: Read this! You know you want to... is out! http://t.co/I2KcrfovOv
Briantist: http://t.co/QDTVGouQ0I As part of a programme of upgrades to UK Free TV I have improved the Twitter interfac
Briantist: http://t.co/NxhkXZY5c8 I have started a programme of upgrades to UK Free TV Today better menus Being respons
Briantist: http://t.co/PNXQsqrIv6 Childrens Нour to go from Radio 4 Extra BBC Radio 4 Extra is to end the Childrens Hour segment o
Briantist: Trying to find out about #windows10 but got "Error establishing a database connection" from http://t.co/yWdE7oOV5k http://t.co/ya1QoShzzV
Briantist: http://t.co/PSnAQyye7q Сhildrens Hour to go from Radio 4 Extra BBC Radio 4 Extra is to end the Childrens Hour segment o
Briantist: Read this! You know you want to... is out! http://t.co/I2KcrfovOv
Briantist: http://t.co/SW0vQToodF Australia Netwοrk goes off the air in the Asia and Pacific region ABC News Australian Broadcasti
Briantist: http://t.co/hF3KSuT6f6 RadioToday wιth RCS Full Time called on Sky Sports News Radio A single Facebook message has sign
Briantist: Read this! You know you want to... is out! http://t.co/I2KcrfovOv

Click here to follow Briantist on Twitter

Northern Ireland "mini multiplex" (NIMM)

I have added information to the UK Free TV database to cover the so-called mini-multiplex that will carry three Irish channels, TG4, RTE1 and RTE2 in a very special multiplex from three transmitters in Northern Ireland.

I have added information to the UK Free TV database to cover th
Published on by on UK Free TV

A special service for 80%-90% of households in Northern Ireland will see three Freeview additional channels being available. These will be:



Some homes will be able to receive the services directly from the Saorview transmitters in the RoI (see <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAClklEQVQ4y5WSvU8TcRjHv/3xuzuk5XhpgSLcCaWU1rcUgokJWFxUjIuDDsbBRV00kX/AxTjoIAxOJmwmDgYHE2KMYoRAbTESDC+lxEigUrFwbSnX9/7uzskFMeBnevLk+3yGJ18T9oF9+tKst8mTWFppyQVmUZwPQ49EoSXjMDslmP51mB4cLgfgJTViIPv6A3QlhiIlKByug9ZqB2zVyHja9hYoDx7akWNXSKLwND89A+ZxIHGqHQm7FdsmHpmSBoOVIFiq/xakX4562VL4Tml27iZLZlG81IMlex3WshkwzQAvCBAEHnwZhaVSBGWfF4bACgCMZ2i2u7Nvxu+VQitn9QKDeuMyplkaqdQOrFYbOI5HPp9HrpBFQc+hjHKgmXH/QGl+GRXne7pJMmnXF8NOpijYvnYB/nwGGabD4ZARj29DiSdgqTRDbpHQUFcHURRBhRMdyIy+R+mF0msyAJ3qyHS7EKmtwdp8CL7ePkS+f0M6l4bL3QFZlkYIMT2RZRmCIIDQBptkuX191VQsAgthGKIFmyfdWPwRhcfZBlVVEVcS6Oz0wuVy3m9oqL/l6fAEzYfMQUpokNKu4+tMZ+v63LKdKYlyjScoESCvqpC8XgQCQRxplaFsKRd9Pt/b3U8nAEAJPWMI3DjpcECvqYZGKUyUBwMD4QQ0NjdCapH27Av9M1Se65soHXOnkxXEmaO6l6NlqKqqxenurpEmqQkcz/3CQVhZXbk7OTVlPH40aPgDM8Z+ebJ7IYrilM604QqBQzi0ADWrDqWzaduBBbZa21cQ7lW75yhi0ShCc6EBTdOeM515DyQAAKutPijw/FVJlvBxwo9o5Gf/xvqGHf/DVnzLqcQVY+zdmBHbjBmpnVT/Xrnfk0gaCPG9B7UAAAAASUVORK5CYII=" class="xico" style="vertical-align:text-bottom" alt="www.saorview.ie link icon"> link iconSAORVIEW - Ireland's free digital television service ), and others will, from the digital switchover date of Wednesday 24th October 2012, have a service provided from three Freeview transmitters in Northern Ireland.



Northern Ireland RTE1 RTE2 TG4 minimux transmitters

However, you will not be able to view these services using a standard-definition Freeview receiver - a Freeview HD box or set will be required. It is not known at this time if the NIMM will carry RTE2 in HD, as per the Saorview service. TG4 and RTE1 are broadcast in standard definition at the moment.

The requirement for a Freeview HD receiver is because the services are being broadcasting in "D-Book Option 11", which uses the DVB-T2 standard ("a new mode, option 11, is being planned for a multiplex in Northern Ireland. Receivers should be able to switch between these automatically", D-Book 7, DTG164 is defined in appendix G as: FFT size 32k, 16QAM modulation, 1/128 guard interval, PP7, FEC 64800). <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAABGdBTUEAALGPC/xhBQAAATtQTFRF/////f37y8rG8PDt7+/s8vLw9PTy9PPy+Pj27Ozr+fn39/b12dnX/Pz6ysnG6enn/f38/Pv62NfW19fW/v386ejmyMjC8fHw8fDv7u3s7Ovq6+vpzMvJ0M/NycjE8/Py8/Lx8vHw9/f19fX0ysrG6+vqzMzK8/Lu9vb1ycnFysnF7+7r7u3r7ezq+/v59vb09fXz8/Px8PDuzs7M6enm8fHv+/v6+fn4+Pj39/f26urmy8rH8/Lw8fHu8fDu4+Ph6+vo4+Pi3t7d5+fl5ubk4uLh29vZ19fV1NTS7+7t8fHt39/d7Ovo09PQ6Ojly8rI7e3s9vX04eHfzs7L1tXT+vn4+fj39vXz+Pf29fTy8/Pw6+rn5eXj/fz77u7rz8/N6OjmzMzJ0tLQ7e3q8O/u9fTz3Nza0dHP4ODeLc0OEAAAAAF0Uk5TAEDm2GYAAADBSURBVHheNcnjYgQxAIXRZGyvbds2atvu+z9BN5np/fedC8BCXa7m68325xfYe4W7aZZlLiQbHlE+6brBzl8wTNCt61eGGJs1EJxDTdv1tWGYJoYDKLfbnW7vlOdVDN+wXBa4eKXK1FoYJPm/6TqGS+FWPPtiozHvpy+N4IjLOr3HY3iPJ5z2pTCEbpiI3f7AG4KLu3vaY3cziGAwHI1J6vljOnUdnyBIZvZJqlAsHT40+wQCdziXVxSCSCpKLgzAH9R1IOTGGZOdAAAAAElFTkSuQmCC" class="xico" style="vertical-align:text-bottom" alt="www.digitaltelevision.gov.uk link icon"> link iconDigital Television - Technical guidance on the availability of TG4 in Northern Ireland after digital switchover says that Option 11 is: DVB-T2 16QAM FEC 1/2.

Update: DVB-T2 16QAM FEC 1/2 provides a bitrate for the multiplex of 12.77Mb/s.

Update: DVB-T2, QPSK modulation, FEC 2/3, 32K carriers, 9.954 Mbit/s.





Your comments: most recent posts are at the bottom

firstFirst comments prevEarlier comments  ◊  Later commentsnext Latest commentslast

Your comments are always welcome. Please use the form below to add your thoughts or questions to this page. We will get back to you as soon as we can.

Briantist
Saturday 10 March 2012 8:46PM

Peter Henderson: You can now see the Whitehead transmitter's radiation pattern here - <img src="data:image/png;base64,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" class="xico" style="vertical-align:text-bottom" alt="www.ukfree.tv link icon" link iconWhitehead digital switchover date | ukfree.tv - independent free digital TV advice

R
Ronan o dwyer
Wednesday 14 March 2012 7:57PM

2 analogue channels from 3 rock mountain still open..
ch 33(RTE2)and ch 35 (TV3).

M
Mike Dimmick
Thursday 12 April 2012 2:30PM

There are some coverage maps in the Republic's Competition Authority's review statement. (The TCA were required to review the joint venture between RT?? and TG4, as both sell advertising.)

See <img src="data:image/png;base64,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" class="xico" style="vertical-align:text-bottom" alt="www.tca.ie link icon" link iconhttp://www.tca.ie/images/….pdf , annex 1 and 3 specifically.

Ronan o dwyer: Analogue switch-off on the island of Ireland is not until 24 October. All four services are still broadcasting from Three Rock, RT?? One on C29, RT?? Two on C33, TV3 on C35 and TG4 on C55, all at 25 kW. Three Rock broadcasts the first Saorview multiplex on C54 at 63 kW, quite an increment when digital services are usually considered equivalent at one-fifth to one-tenth the power of analogue!

I
Iderown
Friday 13 April 2012 7:13AM

Six months to go until DSO in Northern Ireland region. Does anyone know anything further comcerning the NI mini-multiplex (RTE channels)arrangements. Specifically, channel allocations and polarisation at Black Mountain, Carnmoney Hill and Brougher Mountain? Indeed, if these are still the proposed transmitting sites?
Will need to consider the aerial here (Bangor, Co Down) sometime over the summer.

M
Mike Dimmick
Friday 13 April 2012 2:33PM

Iderown: The map I pointed to suggests that the NIMM will cover Bangor. For the full range of UK services you will need to point the aerial to Divis. If you already get a good Channel 5 analogue service from Black Mountain, you're probably good for the NIMM.

We don't yet know which channel will be used, unfortunately, so you may have to gamble on wideband.

If you're the same Iderown on Boards.ie, you should be good to stick with your Group C/D on Clermont Carn. Saorview from there will be 160kW digital after analogue switch-off, which is approximately equivalent to 800kW analogue using the scaling factors that the UK uses to set the digital power level. The current analogue output at Clermont Carn is 250kW. Saorview signals are currently restricted to the north, that restriction is lifted on 24 October. It will replace RT?? One on C52, so if you have good reception of that already, you'll probably get good results from Saorview directly.

I
Iderown
Friday 13 April 2012 5:43PM

Thank you for that Mike Dimmick. Yes, I am the same Iderown. Reception from Clermont Carn (analogue) is marginal to reasonable at Bangor (North Down).
I will most likely hedge the bets, leave the group C/D (V) aerial on the chimney, and keep the diary empty for a few days at the end of October!
It will be an interesting time.

P
Peter Henderson
Friday 13 April 2012 11:34PM Newtownabbey

If you can't get the NIMM from Black Mountain Iderown, you may be able to receive it from Carnmoney Hill which is only across the lough.


Briantist
Tuesday 29 May 2012 6:56PM

UPDATE from <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAgMAAABinRfyAAAACVBMVEUAAAD8/vwEAgTo1XnGAAAAAXRSTlMAQObYZgAAADNJREFUCNdjYMAEjKsYGP4xvfnNsIGJmXF/ANPf/w4MTMyMBxiY/v533MC4ioHhHwMuAAAmbgz06BzauwAAAABJRU5ErkJggg==" class="xico" style="vertical-align:text-bottom" alt="www.bbc.co.uk link icon" link iconBBC News - RTE channels will go on Freeview in Northern Ireland :

RTE channels will go on Freeview in Northern Ireland

People in Northern Ireland will be able to watch RTE TV channels on Freeview following digital TV switchover, the government has confirmed.

Three channels - RTE One, Two and TG4 - will be available.

Freeview delivery of the channels will be supplemented by overspill coverage from Saorview, its equivalent in the Republic.

Digital switchover is to be completed in Northern Ireland on 24 October of this year.

Minister of State for Northern Ireland Hugo Swire said:"This announcement is the culmination of a great deal of work involving the UK and Irish governments, the broadcasters themselves and the regulatory bodies.

"I'm pleased to welcome this important practical step, which will increase the coverage of RTE1 and 2 and importantly of TG4 following digital switchover later this year."

Communications Minister Ed Vaizey said: "I'm delighted that the digital future for TG4, RTE One and RTE Two in Northern Ireland is now strengthened and secure.

"Today's announcement is good news for viewers and continues our delivery on commitments set out in the Good Friday agreement."

Irish Minister for Communications Pat Rabbitte added: "This announcement means that from Analogue Switch-off on 24 October, over 90% of viewers in Northern Ireland will be able to receive TG4 and the two primary RTE channels in digital.

"It is a hugely positive result in terms of practical cooperation resulting from the Good Friday Agreement."

P
Peter Henderson
Tuesday 29 May 2012 11:23PM

At last, something official Brian !

M
Mike Dimmick
Thursday 31 May 2012 2:45PM

Information on the NI mini-mux is now on Digital UK's postcode checker. The selected mode is DVB-T2, QPSK modulation, FEC 2/3, 32K carriers.

Frequencies:

Carnmoney Hill on C48 at 16 watts
Black Mountain on C39+ at 1kW/2kW (directional)
Brougher Mountain on C30- at 1kW

No information on the Guard Interval, but since the obvious pairing of Carnmoney Hill and Black Mountain are on different frequencies, I expect it'll be 1/128. Similarly it will probably use Pilot Pattern 7 to match the HD mode. The recommended configuration in the DVB-T2 Implementation Guide gives 9.954 Mbit/s (the frame lengths can also be altered in T2). Using this mode requires 2.6 - 2.8 dB less signal, compared to the noise level, than the 16QAM 1/2 mode previously suggested, and 14.7 - 15.8 dB less than the HD mode. That's equivalent to broadcasting at 29.5x - 38x the power of the HD mux.

The change in mode could be down to the power level permitted at Brougher Mountain, which is half that previously indicated (i.e. 3 dB less).




Please post a question, answer or commentUK Free TV is here to help people. If you are rude or disrespectful all of your posts will be deleted and you will be banned.







Privacy policy: UK Free Privacy policy.