Television
Mendip was set up as a C/D group transmitter when it entered service with analogue PAL transmissions. In July 2007, Ofcom confirmed that it would remain a C/D group transmitter at digital switchover. The mast broadcasts digital television over a large area of the west of England, including Somerset, Wiltshire, North Somerset, Bath and North-East Somerset, Bristol, South Gloucestershire and Southern Gloucestershire. The station also covers the coastal areas of south east Wales, and in the days of analogue TV, many households used it in preference to their more local station, Wenvoe. This is because prior to the digital switchover, Mendip carried Channel 4 and Channel 5, whereas Wenvoe only carried S4C, which broadcast a lot of Welsh language programming. Indeed many houses still have aerials directed at both stations. Power on analogue transmissions was 500 kW (erp) on channels 1 to 4 but only 126 kW on Channel 5. The latter was transmitted outside of the original C/D grouping of the transmitter but most people in reasonable signal areas could receive it anyway, see aerial gain curves. All 6 digital multiplexes were transmitted at 10 kW until switchover in 2010 when the power on the "BBC A", "BBC B/HD" and "D3&4" multiplexes was boosted to 100 kW. In 2011, SDN was boosted to 50 kW and in 2012 the remaining two Arqiva multiplexes will be boosted to 50 kW too. Mendip's population coverage is around 1.5 million, although some homes in the immediate vicinity, such as those in Cheddar are unable to receive a signal due to being in the shadow of the Mendip Hills and therefore have to depend on local relays.
Read more about this topic: Mendip Transmitting Station
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