Английская Википедия:Black Mountain transmitting station

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Шаблон:Short description Шаблон:EngvarB Шаблон:Use dmy dates Шаблон:Infobox UK Transmitter

The Black Mountain transmitting station is a broadcasting and telecommunications facility, situated on land Шаблон:Convert above Ordnance Datum (mean sea level) to the west of the city of Belfast, in Northern Ireland (Шаблон:Gbmapping). It includes a guyed steel lattice mast which is Шаблон:Convert [1] in height. The height of the top of the structure above mean sea level is Шаблон:Convert. It is owned and operated by Arqiva.

History

Construction

It was built by BICC.[1]

Transmission

  • 1959: The station is commissioned by the Independent Television Authority to transmit ITV signals (provided by Ulster Television) on 405-line VHF, using Channel 9 (Band III) on high power. Service commences on 1 October.
  • 1970: UHF 625-line PAL colour TV begins at high power from the adjacent Divis transmitting station.
  • 1975: A low power UHF filler service begins, designed to cover districts close to the station that cannot pick up Divis.
  • 1976: FM commercial radio station Downtown Radio (later Cool FM) starts transmissions.
  • 1985: VHF 405-line television is discontinued in the UK, having been replaced by the UHF service. The VHF service from Black Mountain closes.
  • 1990: FM commercial radio station BCR (later City Beat) now Q Radio begins on 96.7 MHz on 6 April.
  • 1997: Analogue transmissions of Channel 5 begin at high power.
  • 2001: DAB Digital Radio transmissions start from Score Northern Ireland on block 12D on 6 September.
  • 2005: FM station U105 begins on 105.8 MHz on 14 November.
  • 2012: On 24 October analogue television services are ceased and replaced by digital multiplexes. NImux launches at this and two other transmitter sites in Northern Ireland transmitting TG4, RTÉ One, RTÉ Two and RTÉ Raidió na Gaeltachta to the region.
  • 2019: Further frequency changes took place in September as part of the 700 MHz clearance plan for new mobile telecom services,

Coverage

For high power transmissions of Cool FM, and formerly analogue Channel 5, coverage includes most of central and eastern Ulster, north as far as Ballymena, south as far as Downpatrick and Newry, and west past Dungannon and Cookstown.

Radio stations Q Radio and U105 have a more restricted coverage area, including areas around Greater Belfast, up to Carrickfergus, Antrim, and the shore of Lough Neagh.

With the exception of the NIMM broadcasts, the low power digital TV transmissions are designed only to cover areas of Belfast not already covered by Divis.

Service availability by frequency

Analogue radio

Frequency kW Service
96.7 MHz 0.55 Q Radio Belfast
97.4 MHz 3.2 Cool FM
105.8 MHz 0.96 U105

Digital radio

Frequency Block kW Operator
229.072 MHz 12D 7 Bauer Northern Ireland

Analogue television

31 October 1959 – 8 August 1975

Шаблон:No2Frequency Шаблон:No2VHF Шаблон:No2kW Шаблон:No2Service
Шаблон:UK System A 9 100 UTV

8 August 1975 – 2 November 1982

Шаблон:No2Frequency Шаблон:No2VHF Шаблон:No2UHF Шаблон:No2kW Шаблон:No2Service
Шаблон:UK System A 9 100 UTV
Шаблон:UK System I 39 0.025 BBC1 Northern Ireland
Шаблон:UK System I 45 0.025 BBC2 Northern Ireland
Шаблон:UK System I 49 0.025 UTV

2 November 1982 – 3 January 1985

Шаблон:No2Frequency Шаблон:No2VHF Шаблон:No2UHF Шаблон:No2kW Шаблон:No2Service
Шаблон:UK System A 9 100 UTV
Шаблон:UK System I 39 0.025 BBC1 Northern Ireland
Шаблон:UK System I 41 0.025 Channel 4
Шаблон:UK System I 45 0.025 BBC2 Northern Ireland
Шаблон:UK System I 49 0.025 UTV

3 January 1985 – 30 March 1997

Шаблон:No2Frequency Шаблон:No2UHF Шаблон:No2kW Шаблон:No2Service
Шаблон:UK System I 39 0.025 BBC1 Northern Ireland
Шаблон:UK System I 41 0.025 Channel 4
Шаблон:UK System I 45 0.025 BBC2 Northern Ireland
Шаблон:UK System I 49 0.025 UTV

30 March 1997 – 10 October 2012

Шаблон:No2 Frequency Шаблон:No2 UHF Шаблон:No2 kW Шаблон:No2 Service
Шаблон:UK System I 37 50 Channel 5
Шаблон:UK System I 39 0.025 BBC One Northern Ireland
Шаблон:UK System I 41 0.025 Channel 4
Шаблон:UK System I 45 0.025 BBC Two Northern Ireland
Шаблон:UK System I 49 0.025 UTV

Analogue and digital television

10 October 2012 – 24 October 2012

Шаблон:No2Frequency Шаблон:No2UHF Шаблон:No2kW Шаблон:No2Service Шаблон:No2System
Шаблон:UK System I 37 50 Channel 5 PAL System I
Шаблон:UK System I 39 0.025 BBC One Northern Ireland PAL System I
Шаблон:UK System I 41 0.025 Channel 4 PAL System I
Шаблон:UK DVB-T 45 0.005 BBC A DVB-T
Шаблон:UK System I 49 0.025 UTV PAL System I

Digital television

24 October 2012 – present

Digital television replaced the old analogue signals during October 2012. An additional multiplex named NImux including TG4, RTÉ One, RTÉ Two and RTÉ Raidió na Gaeltachta launched at switchover here and at two other transmitters in Northern Ireland. In September 2019 further frequency changes took place.

Frequency UHF kW Operating Name System
Шаблон:UK DVB-T 33 (was 39+) 3 NImux DVB-T2
Шаблон:UK DVB-T 44 (Was 42) 0.005 Digital 3&4 DVB-T
Шаблон:UK DVB-T 41 (Was 45) 0.005 BBC A DVB-T
Шаблон:UK DVB-T 47 (Was 49) 0.005 BBC B DVB-T2

See also

References

Шаблон:Reflist

External links

Шаблон:Television transmitters in the UK Шаблон:Black Mountain VHF 405-line Transmitter Group

  1. Times Tuesday 27 October 1959, page 6