Cilfrew television relay station: Difference between revisions
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Revision as of 10:56, 21 February 2012
Mast height | 30 metres (98 ft) |
---|---|
Coordinates | 51°40′24″N 3°46′20″W / 51.6732°N 3.7722°W |
Grid reference | SS775986 |
Built | 1980's |
BBC region | BBC Wales |
ITV region | ITV Wales |
The Cilfrew transmitter is sited on a hill south of the village of Tonna, at least 2 km across the valley from Cilfrew in the Neath Valley. It was originally built in the 1980's as a fill-in relay for UHF analogue television serving the villages of Cilfrew itself, Aberdulais and Tonna. It consists of a 30 m self-supporting lattice mast standing on land which is itself about 80 m above sea level. The transmissions are beamed to the north. The Cilfrew transmission station is owned and operated by Arqiva.
Cilfrew transmitter re-radiates the signal received off-air from Kilvey Hill about 15 km to the west. When it came, the digital switchover process for Cilfrew duplicated the timing at the parent station, with the first stage taking place on Wednesday 12 August 2009 and the second stage was completed on Wednesday 9 September 2009, with the Kilvey Hill transmitter-group becoming the first in Wales to complete digital switchover. After the switchover process, analogue channels had ceased broadcasting permanently and the Freeview digital TV services were radiated at an ERP of 3W each.[1]
Channels listed by frequency
Analogue television
1980's - 12 August 2009
Cilfrew (being in Wales) transmitted the S4C variant of Channel 4.
Frequency | UHF | kW | Service |
---|---|---|---|
615.25 MHz | 39 | 0.015 | BBC One Wales |
663.25 MHz | 45 | 0.015 | BBC Two Wales |
695.25 MHz | 49 | 0.015 | ITV1 Wales |
719.25 MHz | 52 | 0.015 | S4C |
Analogue and Digital television
12 August 2009 - 9 September 2009
The UK's Digital Switchover commenced at Kilvey Hill (and therefore at Cilfrew and all its other relays) on 12 August 2009. Analogue BBC Two Wales on channel 45 was first to close, and ITV Wales was moved from channel 49 to channel 45 for its last month of service. Channel 49 was replaced by the new digital BBC A mux which started up in 64-QAM and at full power (i.e 3 W).
Frequency | UHF | kW | Service | System |
---|---|---|---|---|
615.25 MHz | 39 | 0.015 | BBC One Wales | PAL System I |
663.25 MHz | 45 | 0.015 | ITV1 Wales | PAL System I |
698.000 MHz | 49 | 0.003 | BBC A | DVB-T |
719.25 MHz | 52 | 0.015 | S4C | PAL System I |
Digital television
9 September 2009 - Present Day
The remaining analogue TV services were closed down and the digital multiplexes took over on the original analogue channels' frequencies.
Frequency | UHF | kW | Operator |
---|---|---|---|
642.000 MHz | 42 | 0.003 | BBC B |
666.000 MHz | 45 | 0.003 | Digital 3&4 |
698.000 MHz | 49 | 0.003 | BBC A |
References
- ^ "Freeview on Cilfrew TV transmitter". ukfree.tv. Retrieved 2012-02-21.
External links
51°40′24″N 3°46′20″W / 51.673234°N 3.772218°W{{#coordinates:}}: cannot have more than one primary tag per page