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

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Carmel transmitting station

释义

Services available
Analogue television 21 May 1973 - 1 November 1982 1 November 1982 - 15 November 1998 Analogue and digital television 15 November 1998 - 26 August 2009 26 August 2009 - 23 September 2009 Digital television 23 September 2009 - present May 2013 Analogue radio (VHF FM) Digital radio (DAB)
References
External links

{{Infobox UK Transmitter
|name = Carmel
|image =
|map_name = Wales Carmarthenshire
|coordinates = {{coord|51.8225|-4.0567|type:landmark_region:GB|display=inline,title}}
|height = {{convert|151.9|m|ft|0}}
|built = 1973
|demolished =
|collapsed =
|BBC = BBC Wales
|ITV = ITV Wales
}}

The Carmel transmitting station, located half a mile (0.8km) SSW of the village of Carmel in Carmarthenshire, has been broadcasting terrestrial TV and radio services since the mid-1970s. The TV coverage area for the Carmel transmission station includes most of Carmarthenshire, the southern and eastern parts of Pembrokeshire; the southern fringes of Powys and Ceredigion; the northern part of Swansea. The Carmel signal is also receivable in parts of Neath Port Talbot, Bridgend and Rhondda Cynon Taff. Places as far away as Merthyr Tydfil and the north Devon coast are also able to receive signals from Carmel.

Carmel started to switch over to digital terrestrial TV broadcast services on 26 August 2009.^[1]

Services available

Analogue television

21 May 1973 - 1 November 1982

Carmel never did broadcast VHF television, and went live with the UK's three national UHF television services.

{{no2Frequency	{{no2UHF	{{no2kW	{{no2Service
ch=57}}	57	100	BBC1 Wales
ch=60}}	60	100	HTV Wales
ch=63}}	63	100	BBC2 Wales

1 November 1982 - 15 November 1998

The UK's fourth national television service joined the set transmitted from the site. Being in Wales, the S4C variant was broadcast.

{{no2Frequency	{{no2UHF	{{no2kW	{{no2Service
ch=53}}	53	100	S4C
ch=57}}	57	100	BBC1 Wales
ch=60}}	60	100	HTV Wales
ch=63}}	63	100	BBC2 Wales

Analogue and digital television

15 November 1998 - 26 August 2009

The initial rollout of digital television in the UK involved radiating the signals at low power in between the existing analogue channels.

{{no2Frequency	{{no2UHF	{{no2kW	{{no2Service	{{no2System
ch=53}}	53	100	S4C	PAL System I
ch=55}}	55	2.5	BBC (Mux 1)	DVB-T
ch=57}}	57	100	BBC One Wales	PAL System I
ch=59\|off=neg}}	59-	5	SDN (Mux A)	DVB-T
ch=60}}	60	100	ITV Wales (HTV Wales until 2002)	PAL System I
ch=62\|off=neg}}	62-	2.5	BBC (Mux B)	DVB-T
ch=63}}	63	100	BBC Two Wales	PAL System I
ch=65\|off=neg}}	65-	2.5	Digital 3&4 (Mux 2)	DVB-T
ch=66}}	66	1	Arqiva (Mux C)	DVB-T
ch=67}}	67	1	Arqiva (Mux D)	DVB-T

26 August 2009 - 23 September 2009

The UK's digital switchover commenced at this site. Analogue BBC Two Wales closed on channel 63 and ITV1 Wales took over on that frequency for what would be its final 3 weeks of service, vacating channel 60 as it did so. The new BBC A multiplex started up at full power in 64-QAM mode on channel 60, and Mux 1 on channel 55 closed.

{{no2Frequency	{{no2UHF	{{no2kW	{{no2Service	{{no2System
ch=53}}	53	100	S4C	PAL System I
ch=57}}	57	100	BBC One Wales	PAL System I
ch=59\|off=neg}}	59-	5	SDN (Mux A)	DVB-T
ch=60}}	60	20	BBC A	DVB-T
ch=62\|off=neg}}	62-	2.5	BBC (Mux B)	DVB-T
ch=63}}	63	100	ITV Wales	PAL System I
ch=65\|off=neg}}	65-	2.5	Digital 3&4 (Mux 2)	DVB-T
ch=66}}	66	1	Arqiva (Mux C)	DVB-T
ch=67}}	67	1	Arqiva (Mux D)	DVB-T

Digital television

23 September 2009 - present

All the analogue television services closed and the new digital multiplexes took over their frequencies (and two new ones) with name-changes, power increases and a shift to 64-QAM.

Frequency	UHF	kW	Operator
ch=53}}	53	20	Digital 3&4
ch=54}}	54	10	SDN
ch=57}}	57	20	BBC B
ch=58}}	58	10	Arqiva A
ch=60}}	60	20	BBC A
ch=61}}	61	10	Arqiva B

May 2013

As a side-effect of frequency-changes elsewhere in the region to do with clearance of the 800 MHz band for 4G mobile phone use,^[2] Carmel's "Arqiva B" multiplex will have to be moved from channel 61 to channel 49 and the "BBC A" multiplex will get a negative offset.^[3]

{{Yes2Frequency	{{Yes2UHF	{{Yes2kW	{{Yes2Operator
ch=49}}	49	10	Arqiva B
ch=53}}	53	20	Digital 3&4
ch=54}}	54	10	SDN
ch=57}}	57	20	BBC B
ch=58}}	58	10	Arqiva A
ch=60\|off=neg}}	60-	20	BBC A

Analogue radio (VHF FM)

Frequency	kW	Service
88.4 MHz	3	BBC Radio 2
90.6 MHz	3	BBC Radio 3
92.8 MHz	3	BBC Radio 4
95.1 MHz	3	BBC Radio Wales
97.1 MHz	1.4	97.1 Radio Carmarthenshire
98.0 MHz	3	BBC Radio 1
104.6 MHz	3	BBC Radio Cymru
105.2 MHz	3	Real Radio Wales

Digital radio (DAB)

Frequency	Block	kW^[4]	Operator
222.064 MHz	11D	1	Digital One
223.936 MHz	12A	1	Swansea SW Wales
225.648 MHz	12B	5	BBC National DAB

References

1. ^UK Free TV - Freeview on the Carmel transmitter
2. ^{{cite web|last=Summers |first=Nick |url=https://thenextweb.com/eu/2012/02/15/eu-states-must-allow-4g-internet-use-on-analogue-tv-spectrum-by-january-2013/ |title=EU States Must Allow 4G on Analogue TV Spectrum |publisher=Thenextweb.com |date=2012-02-15 |accessdate=2013-05-28}}
3. ^{{cite web|url=http://www.a516digital.com/p/4g-clearance-retunes.html |title=4G clearance retunes |publisher=a516digital |date= |accessdate=2013-05-28}}
4. ^Radio Listeners Guide 2010

External links

[https://www.geograph.org.uk/photo/276847 Pictures of Carmel transmitter masts on Geograph]
Freeview transmission details
Carmel Transmitter at thebigtower.com

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

1 : Transmitter sites in Wales

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