Portsmouth small scale

DAB ensemble · block 8B · 1 transmitters

Ensemble identifier: C1CD
Block: 8B
Frequency: 197.648 MHz
Licence: DS105146
Area: Portsmouth
Services: 25 radio

On the map

Where Portsmouth small scale is radiated from — one transmitter [V], Ofcom's published positions. This says nothing about how far the signal reaches; it is not a coverage map.

What it carries

Transmitters

1 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
Fort Widley	England	8B	197.648 MHz	194 W	28 m	Portsmouth	02/08

Radiation pattern

Its strongest transmitter with a published pattern, Fort Widley. 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.