These moves will free up broadcasting spectrum so it can be used for new services such as mobile broadband.

Once the channels have moved, viewers will need to retune their digital TV, set-top box or digital TV recorder to get them back.

Retuning is done using the remote. For most systems, viewers should press the ‘menu’ button on the remote, look for settings such as ‘channels’ or ‘auto-tuning’, then follow the prompts to retune.  A video and 3-step guide to retuning is available on the website.

Viewers might want to write down their favourite channel, program recordings or parental lock settings before they retune.

There may be some disruption to all TV services for several hours today due to work being conducted at the transmission site. Viewers should wait until after 3:30pm before retuning.

There may also be outages to all TV services over the next two days. Viewers will not need to retune again – the TV services will reappear once the work at the transmission site has been completed.

The retune won’t affect viewers watching TV through the Viewer Access Satellite Television (VAST) service. For those watching free-to-air channels via pay TV, the set-top box may be retuned by the provider.

Viewers can find information about how to retune and any scheduled retune outages on the website or by calling the Digital Ready Information Line.

Viewers who are having difficulty retuning their equipment should check their manufacturer’s handbook or manual for instructions on how to retune, ask a friend or family member to help, visit the retune website or call the Digital Ready Information Line on 1800 20 10 13, 8am to 10pm (AEST), 7 days.