“Talley transmitting station”的意思、由来-开放百科全书

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Talley transmitting station

释义

Channels listed by frequency
Analogue television Spring/Summer 1986 - 26 August 2009 Analogue and digital television 26 August 2009 - 23 September 2009 Digital television 23 September 2009 - present
References
External links

{{Infobox UK transmitter
|name = Talley
|image =
|map = {{Location map+
| Wales Carmarthenshire
| width = 250
| float = center
| caption =
| places ={{Location map~
| Wales Carmarthenshire
| label = Talley
| position =
| mark =
| coordinates = {{coord|51.981004|-3.982384|type:landmark_region:GB|display=inline}}

}}{{Location map~

| Wales Carmarthenshire
| label = Carmel
| position =
| mark = Green pog.svg
| coordinates = {{coord|51.82952|-4.05355|type:landmark_region:GB|display=inline}}
}}
}}
|height = {{convert|17|m|ft|0}}
|gridref = SN639332
|built = 1986
|demolished =
|collapsed =
|relay = Carmel
|BBC = BBC Wales
|ITV = ITV Wales
}}

The Talley television relay station is sited on high ground to the north of the village of Talley in Carmarthenshire. It was originally built in 1986 as a fill-in relay for UHF analogue television covering the community of Talley. It consists of a 17 m wooden telegraph pole standing on a hillside which is itself about 220 m above sea level. The transmissions are beamed southwest and northwest to cover all the small settlements of the area and to provide a signal for the Llansawel repeater about 5 km to the northwest. The Talley transmission station is owned and operated by Arqiva.

Talley transmitter re-radiates the signal received off-air from Carmel about 20 km to the southwest. When it came, the digital switchover process for Talley 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 2 W each.^[1]

Channels listed by frequency

Analogue television

Spring/Summer 1986 - 26 August 2009

Talley entered service in late spring/early summer 1986,^[2] and (being in Wales) transmitted the S4C variant of Channel 4.

{{no2Frequency	{{no2UHF	{{no2kW	{{no2Service
ch=39}}	39	0.0065	BBC One Wales
ch=42}}	42	0.0065	S4C
ch=45}}	45	0.0065	BBC Two Wales
ch=49}}	49	0.0065	ITV1 Wales (HTV Wales until 2002)

Analogue and digital television

26 August 2009 - 23 September 2009

The UK's digital switchover commenced at Carmel (and therefore at Talley and all its other relays) on 26 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. 2 W).

{{no2Frequency	{{no2UHF	{{no2kW	{{no2Service	{{no2System
ch=39}}	39	0.0065	BBC One Wales	PAL System I
ch=42}}	42	0.0065	S4C	PAL System I
ch=45}}	45	0.0065	ITV1 Wales (HTV Wales until 2002)	PAL System I
ch=49}}	49	0.002	BBC A	DVB-T

Digital television

23 September 2009 - present

The remaining analogue TV services were closed down and the digital multiplexes took over on the original analogue channels' frequencies.

Frequency	UHF	kW	Operator
ch=42}}	42	0.002	Digital 3&4
ch=45}}	45	0.002	BBC B
ch=49}}	49	0.002	BBC A

{{See also|List of digital terrestrial television channels (UK)}}

References

1. ^{{cite web |url=http://www.ukfree.tv/txdetail.php?a=SN639332 |title=Freeview on Talley TV transmitter |publisher=ukfree.tv |accessdate=2012-02-17}}
2. ^http://www.bbceng.info/Eng_Inf/EngInf_25.pdf

External links

The Transmission Gallery: Talley

{{Transmitter sites in Wales}}{{Carmel UHF 625-line Transmitter Group}}{{Carmel UHF DVB Transmitter Group}}{{Television transmitters in the UK}}

2 : Transmitter sites in Wales|Carmel UHF 625-line Transmitter Group

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