The Cush Registered User
#1

Below is the list of frequencies allocated by ComReg for DTT (04Oct2011) - http://www.comreg.ie/radio_spectrum/technical_parameters.542.1071.html.
ComReg issued two DTT multiplex licences to RTÉ, one in December 2007 the other in May 2011 - http://www.comreg.ie/radio_spectrum/digital_broadcasting.542.517.html.

Main Sites

Transmission Station Name
Multiplex
UHF Channel No.
Frequency (MHz)
Polarisation
Maximum E.R.P. (Watts)
CAIRN HILL LongfordPSB 0147682H158,489.31
PSB 0244658H158,489.00
CLERMONT CARN LouthPSB 0153730V50,118.72
PSB 02 57762V158,489.00
DUNGARVAN WaterfordPSB 0155746H10,000.00
PSB 0259778H10,000.00
HOLYWELL HILL DonegalPSB 0130546H19,952.62
PSB 0225506H19,952.62
KIPPUREWicklow PSB 0154738H63,095.73
PSB 0258770H63,095.73
MAGHERA ClarePSB 0148690H158,489.31
PSB 0255746H158,489.30
MOUNT LEINSTER CarlowPSB 0145666H158,489.32
PSB 0239618H158,489.30
MULLAGHANISH CorkPSB 0121474H200,000.00
PSB 0224498H200,000.00
SPUR HILL Cork PSB 0145666H50,118.72
PSB 0249698H50,118.72
THREE ROCK DublinPSB 0154738H63,095.73
PSB 0258770H63,095.73
TRUSKMORE SligoPSB 0153730H158,489.31
PSB 0257762H158,489.30
WOODCOCK HILL ClarePSB 0147682H10,000.00
PSB 0244658H10,000.00



Relay/Transposer Sites

Transmission Station Name
Multiplex
UHF Channel No.
Frequency (MHz)
Polarisation
Maximum E.R.P. (Watts)
ACHILL Mayo PSB 0147682V1,995.26
PSB 0244658V1,995.26
ARKLOWWicklowPSB 0121474V250.00
PSB 0224498V250.00
ARANMORE Donegal PSB 0147682V3,981.07
PSB 0244658V3,981.07
BALLYBOFEY Donegal PSB 0147682V100.00
PSB 0244658V100.00
BANTRY HP CorkPSB 0152722H1,000.00
PSB 0256754H1,000.00
BANTRY VP CorkPSB 0152722V1,995.26
PSB 0256754V1,995.26
CAHIR TipperaryPSB 0128530V63.10
PSB 0225506V63.10
CASLA GalwayPSB 0145666V2,511.89
PSB 0241634V2,511.89
CASTLEBAR MayoPSB 0122482H2,000.00
PSB 0225506H2,000.00
CASTLETOWNBERECorkPSB 0155746V3,981.07
PSB 0259778V3,981.07
CLIFDEN GalwayPSB 0126514V5,011.88
PSB 0223490V5,011.88
CLONAKILTY CorkPSB 0148690H50.12
PSB 0252722H50.12
CLONMELWaterfordPSB 0155746H501.12
PSB 0259778H501.12
COLLINS BARRACKS CorkPSB 0150706V80.00
PSB 0237602V80.00
CROSSHAVEN CorkPSB 0146674V501.19
PSB 0256754V501.19
DOONCARTON / IORRAS MayoPSB 0127522H&V501.12
PSB 0232562H&V501.12
FANAD DonegalPSB 0155746V1,584.90
PSB 0259778V1,584.90
FERMOY CorkPSB 0152722V50.00
PSB 0256754V50.00
FERRYPOINT WaterfordPSB 0147682V50.00
PSB 0252722V50.00
FORTH MOUNTAINWexfordPSB 0152722V500.00
PSB 0256754V500.00
GLANMIRE Cork PSB 0147682H200.00
PSB 0252722H200.00
GLENCOLUMBKILLEDonegalPSB 0145666H200.00
PSB 0236 594H200.00
GOREY WexfordPSB 0155746H10.00
PSB 0259778H10.00
GREYSTONES WicklowPSB 0152722V500.00
PSB 0256754V500.00
KILDUFF TipperaryPSB 0152722H25,118.86
PSB 0256754H25,118.86
KILKEAVERAGH KerryPSB 0147682V7,943.28
PSB 0244658V7,943.28
KINSALECorkPSB 0130546V31.62
PSB 0226514V31.62
KNOCKANORE (Cnoc an Oir)KerryPSB 0147682V1,513.56
PSB 0244658V1,513.56
KNOCKMOYLE KerryPSB 0152722V1,000.00
PSB 0256754V1,000.00
LARAGH WicklowPSB 0147682H25.00
PSB 0249698H25.00
LETTERKENNY DonegalPSB 0153730V1,995.26
PSB 0257762V1,995.26
MAAMCLASSACH KerryPSB 0146674V199.53
PSB 0251714V199.53
MAGHERAROARTY/FALCARRAGH DonegalPSB 0122482V501.19
PSB 0227522V501.19
MALIN DonegalPSB 0128530H1,995.26
PSB 0226514H1,995.26
MITCHELSTOWN CorkPSB 0140626V500.00
PSB 0243650V500.00
MONAGHAN MonaghanPSB 0155746H1,995.26
PSB 0259778H1,995.26
MOVILLEDonegalPSB 0145666H1,995.26
PSB 0242642H1,995.26
SUIR VALLEY KilkennyPSB 0152722V2,000.00
PSB 0256754V1,995.00
TONABROCKY GalwayPSB 0126514V250.00
PSB 0223490V250.00
WATERFORD WaterfordPSB 0122482V250.00
PSB 0225506V250.00


Alocated Not Used

Transmission Station Name
Multiplex
UHF Channel No.
Frequency (MHz)
Polarisation
Maximum E.R.P. (Watts)
CROSSBARRY CorkPSB 0146674V100.00
DRIMOLEAGUE CorkPSB 0135586V50.00
DROGHEDA LouthPSB 0121474V125.89
GREENORE LouthPSB 0147682V200.00
INISTIOGE KilkennyPSB 0150706H100.00
KILMACTHOMAS WaterfordPSB 0151714V20.00
LAURAGHKerryPSB 0148690H25.00
LEAP CorkPSB 0137602H20.00
TIMOLEAGUE CorkPSB 0126514V10.00


Department of Communications DTT Spectrum Planning & GE06 DTT Plan - http://www.boards.ie/vbulletin/showthread.php?t=2056351646

12 people have thanked this post
Macy0161 Registered User
#2

I haven't really been paying attention to the Relays (since we use a main Transmitter), but are all on that list on and broadcasting saorview?

The Cush Registered User
#3

Macy0161 said:
I haven't really been paying attention to the Relays (since we use a main Transmitter), but are all on that list on and broadcasting saorview?


Last few sites went live at the end of May, just before Saorview officially launched - http://www.boards.ie/vbulletin/showthread.php?p=72394392#post72394392

1 person has thanked this post
sesswhat Registered User
#4

Will the two Clermont Carn MUXs have different ERPs, or is that an error?

lucernarian Registered User
#5

That seems odd indeed, Ch53 from Clermont Carn's ERP limit is about 50kW when any previous data suggested that all multiplexes were allocated 160kW. As it stands I thought Clermont Carn was at 40kW for both multiplexes and I can say with certainty that it's not high enough to comprehensively cover its service area.

It's also the first time I've seen Greenore having an allocation assigned to it. The previous info I've seen in Comreg documents or posted on boards never mentioned Greenore in the RRC-06 allocations.

I'm not sure if Mount Gabriel is mentioned up there under another place name but it is one that should have spectrum assigned and then used by RTENL for saorview. Also Kilmacthomas, Inishtiogue, Greenore and Drogheda on one of its other allocations (instead of 2 of the PSB muxes from Divis) should have had Saorview transmitters.

It's also strange to see that Fanad has a lower ERP than Malin. Fanad's site is further away from NI and has historically served a larger area than Malin.

The Cush Registered User
#6

To_be_confirmed said:
It's also the first time I've seen Greenore having an allocation assigned to it. The previous info I've seen in Comreg documents or posted on boards never mentioned Greenore in the RRC-06 allocations.


Greenore's planned 200W allocation was under the 250W cutoff for RRC-06 planning so wouldn't have appeared in any documents from that time.

To_be_confirmed said:
I'm not sure if Mount Gabriel is mentioned up there under another place name but it is one that should have spectrum assigned and then used by RTENL for saorview.


Mt Gabriel doesn't have a DTT allocation, the nearest appears to be Bantry.

lucernarian Registered User
#7

I'm well aware of that particular aspect.

But e.g. Drogheda's allocation in the document in this thread is under the threshold for the RRC negotiations yet it was included in RRC06. The likely conclusion when this and other relays on the border in NI were previously discussed was that they were negotiated on the basis of an ERP of "250W". Mainly so that they could be coordinated as part of RRC06. In reality some of the relays will not have a power close to that even if technically the 24dBW allocation remains. E.g. Benagh, Gortnalee.

What suprises me is that the same trick was not applied with Greenore so that it could also have spectrum allocated under RRC06. If a relay with planned ERP of 21dBw 30km from the border was dragged into RRC06 then surely a relay 5km from the border would have been given the same treatment, like OfCom did with NI's relays?

Perhaps Greenore was simply an oversight on the Dept's part during RRC06 and with the congested spectrum in the area, there's simply no space for two Group B multiplexes until after ASO, thereby ruling it out.

Mount Gabriel UHF analogue TV broadcasts at 1kW EIRP if I remember correctly yet it never received an allocation... That's quite peculiar.

The Cush Registered User
#8

To_be_confirmed said:
What suprises me is that the same trick was not applied with Greenore so that it could also have spectrum allocated under RRC06. If a relay with planned ERP of 21dBw 30km from the border was dragged into RRC06 then surely a relay 5km from the border would have been given the same treatment, like OfCom did with NI's relays?

Perhaps Greenore was simply an oversight on the Dept's part during RRC06 and with the congested spectrum in the area, there's simply no space for two Group B multiplexes until after ASO, thereby ruling it out.

Mount Gabriel UHF analogue TV broadcasts at 1kW EIRP if I remember correctly yet it never received an allocation... That's quite peculiar.


I don't think it matters whether Greenore was included in RRC-06 or not, it was still included in RTÉ's and Comreg's plans for DTT as we can see from the Comreg document.

Greenore, Mount Gabriel and all the other approx 120 analogue sites appear to have been cut from the plans due to financial reasons when the DTT plan was was revised to 51 sites early last year following the failure of the commercial DTT process, to replaced by Saorsat coverage.

Had a look at the Louth Co Co planning website, couldn't find an application for a transmitter covering Greenore. As the allocation still exists in the Comreg documents maybe it'll come in future depending on the success of Saorsat.

lucernarian Registered User
#9

Then you'd have to ask why Drogheda was included in RRC06 if its impact across the border is even less than that of the Greenore relay. It was also cut from the plans, though after the Saorview rollout had started.

The Cush Registered User
#10

To_be_confirmed said:
Then you'd have to ask why Drogheda was included in RRC06 if its impact across the border is even less than that of the Greenore relay. It was also cut from the plans, though after the Saorview rollout had started.


It seems the plans for DTT from Drogheda were more advanced than Greenore having been included in RRC-06, Comreg 2007 list of sites and the original 53 site plan.

Why was it included and then dropped, Comreg and RTÉNL are the people to ask I guess.

lucernarian Registered User
#11

And that's the thing, the Greenore relay seemed like an afterthought after RRC06 already happened. It's clear some kind of coordination would be necessary for Greenore even if under the 250W limit. And the absence of a high-powered relay like Mt. Gabriel from any Saorview plans seems like a real oversight on ComReg's part.

Saorsat shouldn't be regarded as a panacea for coverage when it will require the purchase, install and use of specific equipment for it at a much higher cost than for the Saorview service in most cases. I guess it depends on the exact cost of providing Saorview coverage from existing sites but if Laragh, Co. Wicklow can justify it then so can Mt. Gabriel. And I do believe these allocations would have been decided on before any decision was taken on Saorsat.

#12

sesswhat said:
Will the two Clermont Carn MUXs have different ERPs, or is that an error?


I'd guess its an error. MUX 1 and 2 strengths from the other Tx's seem to be the same. Is it not still the case that CC will go to 160 Kw and omnidirectional after ASO?

Error in line 4 of the spreadsheet. The frequency of Lyric FM from CC is listed as 87.8 Mhz. Line 126 says RTE Radio 1's frequency is 95.2 MHz. Should be the other way round.

The Cush Registered User
#13

To_be_confirmed said:
the Greenore relay seemed like an afterthought after RRC06 already happened. It's clear some kind of coordination would be necessary for Greenore even if under the 250W limit.


No more an afterthought than any of the 188 planned RTÉNL PSB sites not included in the 43 at RRC-06 at the time.

My guess is the Greenore DTT site was a replacement/renaming of the exiting Carlingford analogue site, same aerial group and same max ERP.

To_be_confirmed said:
And the absence of a high-powered relay like Mt. Gabriel from any Saorview plans seems like a real oversight on ComReg's part.


Probably a cost saving measure on RTÉ's part. Comreg said in 2007 of Mt Gabriel, Carlingford and other analogue sites at the time
The following are sites currently in use by analogue television transmission operators and may be considered suitable for use as part of a DVB-T network. Suitable frequency assignments can be found, if a DVB-T multiplex operator so requires.

lucernarian Registered User
#14

But Mt. Gabriel compared to Laragh, serving a lightly populated valley in Wicklow at 20W ERP? Doesn't really add up. That's up to RTE to answer I suppose.

And hold on a moment, the large majority of those 180-odd PSB sites were not 3km from the NI border and less than 10km from a relay which was allocated 8 channels from the same aerial group in NI! Coordination would be necessary even if not under the auspices of RRC06.

Your guess is likely correct in that the Carlingford relay is actually located in Greenore but is built to serve Carlingford and Carlingford is by far the larger town and more recognisable. I.e. they are talking about the one and the same site. Ch. 47 happens to be the unused allocation for TV3 from Greenore.

The cost saving is put down to "RTÉ's part" but two points must be considered there. Firstly DCENR pays RTENL's operating costs to a substantial degree and building more DTT sites is not going to come from nothing. Secondly, the DCENR helped fashion the Broadcasting Act 2009 which stipulated rather weak population coverage targets. I.e. no motivation to improve terrestrial coverage beyond the avoidance of political controversy at ASO and to ensure that advertising was still broadcast to a similar number of people as currently happens.

The Cush Registered User
#15

To_be_confirmed said:
And hold on a moment, the large majority of those 180-odd PSB sites were not 3km from the NI border and less than 10km from a relay which was allocated 8 channels from the same aerial group in NI! Coordination would be necessary even if not under the auspices of RRC06.


As we discussed in another thread (re: Ch 39 Mt Leinster) bi-lateral coordination on DTT frequencies has been happening since the late 90's incl post RRC-06 as has been stated by both the Dept and Comreg. The border region is no different.

To_be_confirmed said:
The cost saving is put down to "RTÉ's part" but two points must be considered there. Firstly DCENR pays RTENL's operating costs to a substantial degree and building more DTT sites is not going to come from nothing.


RTÉ/RTÉNL operates on a budget of the Licence Fee and advertising and no additional cash has been allocated by the government to pay for the network upgrade. They are borrowing the money to pay for it.

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