Swindon

DAB ensemble · block 11C · 5 transmitters

Ensemble identifier: C1A4
Block: 11C
Frequency: 220.352 MHz
Licence: DL000033
Area: Swindon
Services: 7 radio, 1 data

On the map

Where Swindon is radiated from — 5 transmitters [V], Ofcom's published positions. This says nothing about how far the signal reaches; it is not a coverage map.

What it carries

Heart SwindonSmooth WiltshireCapital UKSmooth CountryBBC Wilts (Swin)Hits Radio SwinGrt Hits Swindon

Data services

EPG Swindon

Transmitters

5 transmitters, strongest first. TII is the transmitter identifier a receiver can report, which is how you tell which one you are actually hearing in a single-frequency network.
Transmitter	Nation	Block	Frequency	ERP	Height	Area	TII
Blunsdon DAB	England	11C	220.352 MHz	2.5 kW	37 m	Swindon	1A/0B
Malmesbury WT	England	11C	220.352 MHz	1.0 kW	34 m	Malmesbury	1A/05
Membury	England	11C	220.352 MHz	1.0 kW	112 m	Swindon	1A/12
Cirencester	England	11C	220.352 MHz	600 W	40 m	Cirencester	1A/03
Marlborough	England	11C	220.352 MHz	501 W	44 m	Marlborough	1A/13

Radiation pattern

Its strongest transmitter with a published pattern, Blunsdon DAB. Other transmitters of this ensemble may shape their signal differently.

Radiates most strongly toward the east (70°), as published by Ofcom.

More detail

Each ring is 10 dB of attenuation below the pattern's own peak; the outer rim is the peak itself and anything 30 dB down or deeper is drawn at the centre rather than off the edge of the chart, so a very deep null reads as “weak” and not as a hole in the picture. The shape says which direction radiates harder relative to the mast's own peak, not the absolute field strength there or how far it reaches — that is what the coverage map and the postcode lookup are for.