NO394407).[1] It includes a guyed steel lattice mast which is 229.5 metres (753 ft)[2] in height. Mounted at the top are the UHF television antennas, contained within a GRP shroud. These antennas have an average height above Ordnance Datum of 547 metres (1,795 ft).[3] It is owned and operated by Arqiva.
Digital terrestrial television was first transmitted from the Angus 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 4 August 2010, BBC Two was switched off on UHF 63 and ITV1 was switched from UHF 60 for its final weeks of service. Multiplex 1 on UHF 68 was closed and replaced by BBC A on UHF 60 (which had just been vacated by analogue ITV1). BBC A was transmitted at full power (20 kW) and in 64QAM, 8k carriers mode from the start.
Following the completion of analogue TV shutdown on 18 August 2010, Angus transmitted all of its higher powered multiplexes at 20 kW for PSB 1, 2 and 3, and 10 kW for COM 4, 5 and 6. From this date the frequency allocation was:
Due to the clearance of the 800 MHz band, Arqiva B was moved from UHF 61 to UHF 49 and BBC A gained a negative offset. Also during this time, COM 7 and 8 and the Local TV multiplex launched.
^"Archived copy". tx.mb21.co.uk. Archived from the original on 25 September 2006. Retrieved 13 January 2022.{{cite web}}: CS1 maint: archived copy as title (link)
^"Archived copy". tx.mb21.co.uk. Archived from the original on 25 September 2006. Retrieved 13 January 2022.{{cite web}}: CS1 maint: archived copy as title (link)