Saorview on the Mount Leinster (Republic of Ireland) transmitter
 | Google map |  | Bing map |  | Google Earth |  | 52.618,-6.780 or 52°37'6"N 6°46'47"W |
The symbol shows the location of the Mount Leinster (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 Mount Leinster transmitter._______
Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
DTG-1003 64QAM 8K 2/3 24.1Mb/s DVB-T MPEG4
H/V: aerial position (horizontal or vertical)
Which Saorview channels does the Mount Leinster 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.
| Mux | H/V | Frequency | Height | Mode | Watts |
| SV1 | H max | C23 (490.0MHz) | 906m | DTG-1003 | 160,000W |
 3 Virgin Media 1, 4 TG4 (RoI), 21 RTÉ News Now, 22 Tithe an Oireachtais , | |||||
| SV2 | H max | C39 (618.0MHz) | 906m | DTG-1003 | 160,000W |
 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 (*, | |||||
H/V: aerial position (horizontal or vertical)
How will the Mount Leinster (Republic of Ireland) transmission frequencies change over time?
| 1984-97 | 1997-98 | 1998-2012 | 2012-13 | - | |||||
| A B C/D E K T VHF | A B C/D E K T VHF | A B C/D E K T VHF | K T | K T | |||||
| C23 | SV1 | SV1 | |||||||
| C39 | SV2 | SV2 |
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, 30 November 2016
A
A.J.12:38 PM
To 'Anonymous' above: probably best to keep each telescopic rod at 45 degrees, i.e. at 'half vertical, half horizontal' so to speak. This will allow for a variety of different polarisations used by RTE sites, or even lower powered independent sites. The broad sides of the rods should of course be facing towards Ireland, & it probably goes without saying a multi-element outdoor FM aerial (even without amplifier) will more likely bring you greater success. By the way, to the other users on this particular page, I can definitely confirm that Mount Leinster is transmitting SAORVIEW on UHF channels 23 & 26 only (NOT channel 39 as stated) & I understand the tech. standard to be DVB-T with MPEG4
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Friday, 8 March 2019
A
Adam Jackson10:36 PM
I am on the west coast of Wales in a village called St Nicholas about 1 mile from the coast, 3 miles west of Fishguard. We have a loft aerial pointed to Mt Leinster sat above another pointed to the local Freeview transmitter - Trefin. The 2 aerial feeds are combined user a splitter in reverse sending the signals down one cable. I could put the aerials on the roof to get an even better reception but even after the 3.5db loss on the combiner still get around 70% signal/100% quality on ch23 and 60% signal/100% quality on ch26. Relatively new set up, had some high winds and rain with no problems. Will see what happens when we get any atmospheric interference.
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Saturday, 6 April 2019
A
Adam Jackson4:52 PM
Going from extremely low to complete loss of signal on the Irish channels today, both muxes are near impossible to watch. From a very good signal to almost nothing, I assumed it was a set up problem. Checked all cables and connections, everything seems fine. Pointed both aerials to Mt Leinster and both are having issues so hoping some sort of atmospheric problem that will fix itself on its own.
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Sunday, 20 September 2020
A
Adam Jackson7:10 PM
18 months later and the loft aerial seems adequate for my location. Get the odd time when the signal quality drops below a watchable level even through the signal strength is within my 'normal' range. This results in both mixes becoming unwatchable, but this is only for an hour or 2 now and again or at worse, for an evening. 90% of the time, it's a stable 60-70% signal strength with 100% signal quality.
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Tuesday, 22 September 2020
C
Chris.SE5:11 AM
Adam Jackson:
Any very recent disruption is more likely to be "Tropospheric Ducting" around causing interference, see Effect of tropospheric ducting on Freeview | RTIS for a simplistic explanation. It can be quite variable, come and go within seconds, minutes or hours. It has been particularly strong recently which can wipe out your reception. Climate change is likely to mean these sort of events could be more common.
Currently it may continue on and off for a day or two more.
I hope you saw my reply to you on the Preseli board which was also when there was "Tropo" around!
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Sunday, 23 July 2023
A
Adam Jackson4:30 PM
Chris.SE
Sorry for the late response. Only 3 years! Yes, you were correct. I have come to the realisation that this type of interference is semi common for my situation during hot, summer days and to my understanding there is not a lot that can be done to prevent it. I could get a slightly higher signal by installing the aerial outside but I feel that during these types of interference, the aerial being outside wouldn't solve the issue.
I'm currently using your run of the mill single boom high gain aerial. Is there a certain kind of aerial best suited to my situation. I have thought maybe a tri-boom aerial. As previously stated, the problem only occurs sporadically during hot summer days but would be nice to eliminate/minimise it if possible.
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S
Steve Donaldson6:32 PM
Adam Jackson: See here for the memorandum of understanding (MoU) co-ordination plans between Ireland and the UK on the post-700MHz Clearance channel allocations:
www.comreg.ie/publication/mou-co-ordinate-dtt-frequency-plans-ofcom-comreg
By my reckoning Mount Leinster is on a bearing of around 300, which is 120 from the transmitter. It uses C23 and C26, both of which are used by Carmel and Stockland Hill.
For Mount Leinster on both these channels, the MoU states -10dB from 102 to 128 (for Carmel), and -3dB from 129 to 135 (for Stockland Hill).
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S
Steve Donaldson7:09 PM
Adam Jackson: The St. Davids relay transmitter uses C23 and C26, vertically-polarised. It is about 7 clockwise of Trefin from St. Nicholas. Prior to 700MHz clearance both St. Davids and Mt. Leinster were co-channel on C23 and C26, so nothing has changed there.
That the Trefin relay uses C22, C25 and C28 means it's not possible to filter the Trefin aerial. However, it may be worth considering that the difficulty isn't the fading of or interference to the Mt. Leinster signal from the Mt. Leinster aerial, but increasing signal from St. Davids on the Trefin aerial.
At such times, it would be worth removing the Trefin aerial and reverse-splitter from the equation. If this cures things, and the signal directly from the Mt. Leinster aerial is good, then perhaps turning the Trefin aerial a bit anti-clockwise off-beam might help nullify the unwanted St Davids signal.
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S
Steve Donaldson7:14 PM
Adam Jackson: I should add that in the above two postings the numbers are bearings in degrees. I typed them with a degree-symbol but the website has removed this character!
The MoU figures are "from 102degrees to 128degrees (for Carmel), and -3dB from 129degrees to 135degrees (for Stockland Hill)." The St Davids transmitter is about 7 degrees clockwise of Trefin, is what it is meant to say.
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C
Chris.SE11:27 PM
Adam Jackson:
Hi. Some very useful information there from Steve Donaldson.
Taking account of his comments and transmitter directions then you may be best picking an aerial with a small beamwidth (acceptance angle) but also very small rear side lobes and high front-back ratio, also good cross-polar rejection.
Log-periodics are worth a consideration in this respect.
Not all manufactures quote all the relevant figures and don't just go by some sellers bumf, check it's genuine manufacturer's data. Checking polar diagrams is always best alongside the figures, but again they aren't always available. Try emailing the manufacturer direct for such information, reputable manufacturers should oblige.
Which ever type of aerial comes out best, make sure it's ideally a group A for your channels but a Group K would do.
But don't got for Group T or Wideband as there are no channels above C48 and these leave you vulnerable to potential mobile phone interference as newer/upgraded masts operating at 700MHz appear.
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