The Mynydd Emroch television relay station is sited on the eponymous hill to the east of Port Talbot.

In the current age of digital television, Mynydd Emroch transmitter re-radiates the signal received off-air from Kilvey Hill about 10 miles (15 km) to the west.

When it came, the digital switchover process for Mynydd Emroch duplicated the timing at Kilvey Hill (Mynydd Emroch's new parent station) with the first stage taking place on Wednesday 12 August 2009 and the second stage was completed on Wednesday 9 September 2009, with the Kilvey Hill transmitter-group becoming the first in Wales to complete digital switchover.

After the switchover process, analogue channels had ceased broadcasting permanently and the Freeview digital TV services were radiated at an ERP of 18 W each.

The UK's digital switchover commenced at Kilvey Hill (and therefore at Mynydd Emroch and all its other relays) on 12 August 2009.