Siston

England · TV and DAB

Position: 51.468221, -2.478192
Grid reference: ST66887447
Nation: England
Ground height: 70 m
Antenna height: 15 m
Aerial group: Group A — C21–37, the low end of the band
Polarisation: Vertical
BBC region: West
ITV region: West
ITV news region: West
Parent transmitter: Mendip
Ofcom site number: 11073

The position is our conversion of Ofcom's grid reference ST66887447 from OSGB36 to WGS84 [V]. Ofcom publish no latitude and longitude for television sites. The transform is verified rather than assumed: on the 3,403 radio records that carry both, it reproduces Ofcom's own coordinates to within 0.1 m.

How far it reaches

The share of the UK's 238,895 Census Output Areas where this mast is the strongest signal of its kind. Not the share it reaches at all — most places can receive several transmitters, and only one of them can be the best.

Band	Best signal in
Television	0.01% of UK Output Areas	a relay, serving a local area
DAB radio	0.08% of UK Output Areas	a relay, serving a local area

On the map

Where Siston is the strongest signal for television and DAB radio.

Television

Multiplexes transmitted from this site, as published by Ofcom.
Mux	Freeview name	Channel	Frequency	ERP	System	Operator
PSB1	BBC A	C26	514 MHz	8 W	DVB-T	BBC
PSB2	D3&4	C23	490 MHz	8 W	DVB-T	Digital 3&4 (ITV/Channel 4)
PSB3	BBC B	C29	538 MHz	8 W	DVB-T2	BBC

DAB radio

DAB ensembles carried here.
Ensemble	Block	Frequency	ERP	Height	Area	EId	Services
Bristol	11B	218.640 MHz	600 W	26 m	Bristol	C18C	7
D1 National	11D	222.064 MHz	20 W	26 m	Bristol	C181	30
BBC National DAB	12B	225.648 MHz	18 W	25 m	Bristol	CE15	16

Bristol — block 11B

Heart BristolEPG BristolSmooth BristolCapital UKBBC BristolHITS RADIO WestGrt Hits Bristol

D1 National — block 11D

BBC National DAB — block 12B

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