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|height = |gridref = SM924015 |built = 1980's |demolished = |collapsed = |relay = Carmel |BBC = BBC Wales |ITV = ITV Wales }} The Greenhill television relay station is sited on high ground known as "Greenhill" to the south of the towns of Milford Haven and Pembroke Dock in south Wales. It was originally built in the 1980s as a fill-in relay for UHF analogue television covering the communities of Pwllcrochan, Wallaston Cross, Wallaston Green, Rhoscrowther and Hundleton. It consists of a 45 m self-supporting lattice steel mast standing on a hillside which is itself about 75 m above sea level. The transmissions are beamed broadly south to cover its targets. The Greenhill transmission station is owned and operated by Arqiva. Greenhill transmitter re-radiates the signal received off-air from Carmel about 45 km to the northeast. When it came, the digital switchover process for Greenhill duplicated the timing at Carmel with the first stage taking place on 26 August 2009 and with the second stage being completed on 23 September 2009. After the switchover process, analogue channels had ceased broadcasting permanently and the Freeview digital TV services were radiated at an ERP of 30 W each.〔(【引用サイトリンク】title=Freeview on Greenhill TV transmitter )〕 ==Channels listed by frequency== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Greenhill transmitting station」の詳細全文を読む スポンサード リンク
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