Residents in Nottinghamshire will need to re-tune their televisions on August 24 and September 27.
Freeview viewers, tuned to the Nottingham TV transmitter, will need to re-tune their equipment for important changes to local signals are carried out.
The changes will take place after midnight on both days and are expected to be complete by 6 am. All Freeview, BT Vision and Top Up TV boxes, as well as digital TVs, should be re-tuned at any point after this.
Anyone needing further help can visit www.digitaluk.co.uk/retuning or ring 08456 50 50 50.