“North Hessary Tor transmitting station”的意思、由来-开放百科全书

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North Hessary Tor transmitting station

释义

Services listed by frequency
Analogue radio (FM VHF) Digital radio (DAB) Analogue television 17 December 1954 - 3 January 1985 Until 12 August 2009 Analogue and digital television 12 August 2009 - 9 September 2009 Digital television 9 September 2009 - June 2013 From June 2013
See also
References
External links

{{Infobox UK transmitter
|name = North Hessary Tor
|image = North Hessary Tor transmitting station.jpg
|map = {{Location map+
| Devon
| width = 250
| float = center
| caption =
| places = {{Location map~
| Devon
| label = North Hessary Tor
| position =
| coordinates = {{coord|50.550278|-4.008333|type:landmark_region:GB|display=inline}}

}}{{Location map~

| Devon
| label = Caradon Hill
| position = bottom
| mark = Green pog.svg
| coordinates = {{coord|50.511389|-4.436667|type:landmark_region:GB|display=inline}}
}}
}}
|location =
|height = {{convert|196|m|ft|0}}
|gridref = SX578742
|built = 1955
|demolished =
|collapsed =
|relay = Caradon Hill
|BBC = BBC South West
|ITV = ITV Westcountry
|switchoverdate =
|switchoverdate2 =
|footnotes =
}}

Situated on the summit of North Hessary Tor in Devon, England is an FM radio and television transmitter which uses as aerial a {{convert|196|m|ft|0}} high guyed mast. It was built by the BBC in 1955 when a transmitter was needed to introduce 405 line television into Devon. It now carries a small UHF TV transmitter which serves Princetown and Dartmoor. FM radio transmissions began in 1956 and cover most of Devon and eastern parts of Cornwall. It is owned and operated by Arqiva.

Services listed by frequency

Analogue radio (FM VHF)

Frequency	kW	Service
88.1 MHz	160	BBC Radio 2
90.3 MHz	160	BBC Radio 3
92.5 MHz	160	BBC Radio 4
97.7 MHz	160	BBC Radio 1
100.0 MHz	160	Classic FM
103.4 MHz	15	BBC Radio Devon

In all BBC publications the national FM ERPs for North Hessary Tor are listed as 160 kW (Mixed Polarisation): Classic FM list their ERP as 80 kW (Horizontal) and 80 kW (Vertical) for North Hessary Tor which is the same as the BBC e.g. 160 kW (Mixed Polarisation) ERP.

Digital radio (DAB)

Frequency	Block	kW	Operator
225.648 MHz	12B	3.2	BBC National DAB

Analogue television

17 December 1954 - 3 January 1985

{{no2Frequency	{{no2VHF	{{no2kW	{{no2Service
ch=2}}	2	15	BBC1

Until 12 August 2009

{{no2Frequency	{{no2UHF	{{no2kW	{{no2Service
ch=55}}	55	0.012	BBC One
ch=59}}	59	0.012	ITV1
ch=62}}	62	0.012	BBC Two
ch=65}}	65	0.012	Channel 4

Analogue and digital television

12 August 2009 - 9 September 2009

{{no2Frequency	{{no2UHF	{{no2kW	{{no2Service	{{no2System
ch=55}}	55	0.012	BBC One	PAL System I
ch=59}}	59	0.012	ITV1	PAL System I
ch=62\|off=neg}}	62	0.0025	BBC A	DVB-T
823.25 MHz	65	0.012	Channel 4	PAL System I

Digital television

9 September 2009 - June 2013

Frequency	UHF	kW	Operator	System
ch=55}}	55	0.0025	BBC B	DVB-T2
ch=59}}	59	0.0025	Digital 3&4	DVB-T
ch=62\|off=neg}}	62-	0.0025	BBC A	DVB-T

From June 2013

In June 2013, BBC A moved from UHF 62- to UHF 50, to allow for the clearance of the 800 MHz band for 4G LTE mobile services.

{{yes2Frequency	{{yes2UHF	{{yes2kW	{{yes2Operator	{{yes2System
ch=50}}	50	0.0025	BBC A	DVB-T
ch=55}}	55	0.0025	BBC B	DVB-T2
ch=59}}	59	0.0025	Digital 3&4	DVB-T

References

External links

The Transmission Gallery: North Hessary Tor Transmitting Station photographs, coverage maps and information
North Hessary Tor Transmitter at thebigtower.com

2 : Radio masts and towers in Europe|Transmitter sites in England

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