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Saorview on the Clermont Carn (Republic of Ireland) transmitter

first published this on - UK Free TV
sa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps54.079,-6.323 or 54°4'45"N 6°19'23"W

 

The symbol shows the location of the Clermont Carn (Republic of Ireland) transmitter. 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 Clermont Carn transmitter.

Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name
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Which Saorview channels does the Clermont Carn transmitter broadcast?

If you have any kind of Saorview fault, follow this Saorview 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
SV1
 V max
C42 (642.0MHz)626mDTG-1003160,000W
Channel icons
2 RTÉ2 HD, 3 Virgin Media 1, 4 TG4 (RoI), 21 RTÉ News Now, 22 Tithe an Oireachtais ,

SV2
 V max
C45 (666.0MHz)626mDTG-1003160,000W
Channel icons
1 RTÉ One HD, 5 Virgin Media 2 , 6 Virgin Media 3, 7 RTÉ jr, 11 RTÉ One +1, 12 RTÉ2+1, 27 Saorview Information (*,

DTG-1003 64QAM 8K 2/3 24.1Mb/s DVB-T MPEG4
H/V: aerial position (horizontal or vertical)

How will the Clermont Carn (Republic of Ireland) transmission frequencies change over time?

1984-971997-981998-20122012-131 Sep 2019
A B C/D E K T VHFA B C/D E K T VHFA B C/D E K T VHFC/D E TB E K T
C42SV1
C45SV2
C52tv_offSV1
C56tv_offSV2

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 1 Jan 12 and 1 Jan 12.

How do the old analogue and currrent digital signal levels compare?

SV1||, SV2|| 160kW

Comments
Wednesday, 1 August 2012
I
Ian Quinn
10:55 AM

Can one find out what Clermont Carn tx power is at currently. Just wondering when they ramp up to 160, if it will make all that much different in Skerries area...drops quite a bit at the moment.

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Ian Quinn's 1 post US
Dave Lindsay
sentiment_very_satisfiedPlatinum

11:15 AM

Ian Quinn: The power goes up at switchover, at which time the multiplex moves from C53 to C52.

http://www.rtenl.ie/wp-co….pdf

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Dave Lindsay's 5,724 posts GB
Wednesday, 15 August 2012
T
Tracey
3:00 PM
Newry

Hi

I am getting the RTE channels from Clermont Cairn how can i get the bbc channels as well ? do i need a seperate digi box ? is this available ?

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Tracey's 1 post GB
Dave Lindsay
sentiment_very_satisfiedPlatinum

3:16 PM

Tracey: You appear to be on the fringes of the reception area for Divis' digital signals once has switched-over. Therefore I don't think that you've got any chance of getting anything other than the four terrestrial analogue channels until then.

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Dave Lindsay's 5,724 posts GB
Sunday, 19 August 2012
P
Paul
sentiment_satisfiedBronze

5:33 PM
Larne

@Tracey - do a postcode based search on this site to find your best freeview transmitter. Also look at neighbours aerials to see what they are doing. You will need a filtered combiner for two aerials if you wish to receive freeview and saorview on the same devices. There are some stbs which work with both.

Paul

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Paul's 39 posts GB
P
Paul
sentiment_satisfiedBronze

5:52 PM
Larne

Can someone confirm that clermont carn is actively transmitting saorview 24/7 these days ?

I challenged myself to see if I can receive saorview in BT40. I bought a decent aerial and masthead amp and a filtered combiner to mix with freeview signals. I bought a triax official saorview decoder and no joy yet.

Quick summary of results so far:

Receiving four analog channels ok - rte1 is barely watchable. Tv3 and tg4 are grand while rte is a bit furry.

The decoder is seeing signal on channel 53 and 57 - but it never indicates any decent "quality" metric and never successfully finds channels in the mux at C53.

I am using decent PF100 cable everywhere, fresh f connectors etc. The aerial has 18dB gain while the amp is 27dB.

I have another tv that has mpeg4 DVB-T2 receiver although not official soarview - it has same behaviour.

Is it simply cos the launch power at clermont carn is so weak that the decoder is unable to extract any meaningful data from it - despite all the gain I have ?

The aerial was aimed live while viewing worst channel.

Some questions - is it worth trying the aerial with a lot more elevation above the roofline as I kept it quite low to reduce impact of wind loading as its quite a hefty aerial - labgear 450W.

The weird thing is that the triax decoder picks up the uk freeview signals just fine - and it reports similar signal strength on some of the uk muxes as it does the Irish ones.

It gets weirder as some uk muxes report much higher strength than other. Best example is C33 which reports 15% while C34 is 90%. My other decoders do not see such diffierence in strength while they all receive at same lovely quality.

Bit perplexed so keen for any expert advice. I may yet rent a specialised measurement set.

Paul

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Paul's 39 posts GB
P
Peter Henderson
8:05 PM

I'm a bit perplexed as well Paul.

Originally I had a group CD 18 element aerial and all the analogue stations from Clermont Cairn were fine. I was also receiving Saorview intermitently (the picture was viewable at times when they were transmitting in MPEG 2).

I then changed the antenna to a triax (36 element I think) and this actually made the situation worse. Slight ghosting on all analogue channels and no reception from Saorview at all. Occasionally, the placeholders appear on my Philps TV but no signal. On a retune my Toshiba sometimes stops on 53 for several minutes but it never finds any channels. I'm wondering if the signal on the triax is too strong (hence the slight ghosting).

When I had the 18 element aerial up every now and again the signal strength went up to around 60% and reception was perfect (as if they'd removed the null) only to disappear again a few days later.

I'm not sure what will happen on the 24th October when the power supposedly will be increased. There is some talk on Digital Spy that this may be delayed until the 61 and 62 clearance in the UK (November 13th I think is the date).

I need some work done on the terrestrial aerials (some damage last winter) so I may very well go back to something a bit smaller (too many large aerials on the mast I think).

I may try a simpler wideband one rather than a group CD.

I take it BT 40 is somewhere around the Larne area Paul ? Digital UK's postcode checker does predict some reception from Black Mountain of the RTE NI mux, despite Craigy Hill being on channel 39 and the NI mux on 39+

How's your reception from Divis ?

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Peter Henderson's 15 posts GB
P
Peter Henderson
8:11 PM

P.S Channel 34 is also has the strongest signal at this location as well. Digital UK predict this will actually decrease after DSO, despite power being increased from 1.365 to 50 kw, which seems a bit strange.

Still, they say channel 23 here has only variable/poor reception yet I can receive it OK most of the time (I only have a problem during lift conditions), so I guess we'll just have to wait and see.

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Peter Henderson's 15 posts GB
P
Peter Henderson
8:12 PM

Sorry, typo, Power increase will be 1.6 to 50 kw

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Peter Henderson's 15 posts GB
Monday, 20 August 2012
P
PaulN
sentiment_satisfiedBronze

1:35 AM

Thanks Peter... I am in Larne area... don't wish to give out exact postcode here obviously.

My Divis reception for analog & digital is fine. I do get some sessions of crappy performance on MUX1 (C29) and MUX2 (C33) - what are these 'lift conditions' you speak of ?

MUXs A thru D are much less affected for some odd reason.

Another Q I forgot to post - is there significant benefit with masthead amp installation as close to aerial as possible ?

Mine are approx 2-3m from aerials with a nice dry location in the attic where I can lash things up for testing and try different things. A decent 'loft box' distributes the aggregated UHF to a few TVs in the house.

Aggregation is done by a Triax 5052 filtered combiner - the dual aerial setup is pretty impossible without that.

I am reckoning to wait until after Oct 24th to see what improvements occur - then maybe I will experiment some more with taller masts etc.

Its annoying that NIMM isn't destined for Divis - that would have been too convenient I suppose.

If all else fails there is always Saorsat but that would feel like defeat really.

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PaulN's 39 posts GB
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