It includes a guyed steel lattice mast, and on top of this is the UHF television transmitting antenna, which brings the overall height of the structure to 117.7 metres (386 ft).
The transmission site is located at 51° 01' 2.0″ North, 0° 42' 4.0" West[1] (National Grid Reference: SU912250[2]).
The current mast has an average height of 307 metres above sea level. It is now owned and operated by Arqiva, but was owned by the BBC before they privatised their transmission department prior to 1997.
Digital terrestrial television was first transmitted from the Midhurst mast from 15 November 1998 using the frequency gaps between the analogue TV broadcasts. To limit interference to the analogue transmissions, power output on the digital multiplexes was low.
On 29 February 2012, Midhurst started DSO with analogue BBC2 ceasing transmission on UHF 55 and Mux 1 closed on UHF 56.[3] The new BBC A multiplex started on UHF 55 from the start.
Due to the clearance of the 700 MHz band,[6] SDN was moved from UHF 54 to UHF 29, this allowed Digital 3&4 to move from UHF 56 to UHF 54 (this was a "Transitional" frequency for 700MHZ clearance purposes), BBC A from UHF 55 to UHF 48 and Arqiva B from UHF 50 to UHF 33.