| 词条 | Mynydd Pencarreg transmitting station | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 释义 |
|name = Mynydd Pencarreg |image = |map_name = Wales Carmarthenshire |coordinates = {{coord|52.067501|-4.076674|type:landmark_region:GB|display=inline,title}} |height = {{convert|99|m|ft|0}} |gridref= SN577430 |built = 1956 |demolished = |collapsed = |relay = Carmel |BBC = BBC Wales |ITV = ITV Wales }} The Mynydd Pencarreg transmitting station is a broadcasting and telecommunications facility located on high ground about 10 km south of Lampeter, in Ceredigion, Wales. The site has a guyed {{convert|99|m|ft|0|abbr=on}} lattice mast erected on land that is itself about {{convert|410|m|ft|0|abbr=on}} above sea level. It was originally built by the GPO as a telecommunications relay, and (amongst other things) was responsible for handling the microwave feed carrying the now-defunct 405-line VHF BBC television service to the television transmitter at Blaenplwyf about 35 km to the northwest near Aberystwyth. Despite this, Mynydd Pencarreg was never a 405-line TV broadcast site. Broadcast UHF television was added to the site in early 1981,[1] launching with just the three programme services that were active at the time. S4C was added in 1982 when it launched. Currently, the transmitter provides DVB-T digital television to the Lampeter area, along with FM radio. Services listed by frequencyAnalogue televisionFebruary 1981 - 1 November 1982When 625-line colour television came to the area, the site became a relay of Preseli about 50 km to the southwest.
1 November 1982 - 19 August 2009Channel 4 was added to the set transmitted from the site when it launched in November 1982. Being in Wales, Mynydd Pencarreg radiated the S4C variant.
Analogue and digital television19 August 2009 - 16 September 2009The UK's digital switchover commenced, mirroring the changes taking place at the parent transmitter at Preseli. Analogue BBC Two Wales closed on channel 64 and ITV1 Wales took over on that frequency for what would be its final 3 weeks of service, vacating channel 61 as it did so. The new digital BBC A multiplex started up at full power in 64-QAM mode on channel 61.
Digital television16 September 2009 - 31 October 2012All the analogue television services closed and the new digital multiplexes took over their frequencies.
31 October 2012 - presentOFCOM have announced that channel 61 is also to be cleared so as to make space for future 4G mobile phone services.[2] At Mynydd Pencarreg, BBC A was moved from channel 61 to channel 49.[3]
Analogue radio (FM VHF)August 1981 - Late 1980sFM radio from Mynydd Pencarreg launched in 1981,[4] initially with just the three services that were typical of the time. For radio, the site was an off-air relay of Blaenplwyf.
Present
See also
References1. ^http://www.bbceng.info/Eng_Inf/EngInf_4.pdf 2. ^http://www.ukfree.tv/fullstory.php?storyid=1107051995 3. ^http://www.a516digital.com/p/4g-clearance-retunes.html 4. ^http://www.bbceng.info/Eng_Inf/EngInf_6.pdf External links
2 : Buildings and structures in Carmarthenshire|Transmitter sites in Wales |
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