The switchover was marked in Dumfries with a visit from Digit Al who took charge of a flock of colourful sheep
More than 300,000 households across the south of Scotland and northern England have switched to digital television.
At midnight on Tuesday a programme to permanently shut down the old analogue signals throughout Dumfries and Galloway and much of Cumbria began.
It follows similar moves in the Scottish Borders late last year.
The latest stage of the switchover is part of conversion plans being rolled out across Scotland and the rest of Britain by 2012.
Dumfries and Galloway is the second region in Scotland to switch from the old analogue TV signal to the new digital one.
The Scottish Borders made the move in November.
Research from Digital UK - the organisation behind the switch - estimates that about 15% of households in the south west of Scotland have yet to convert their main television sets to digital.
Earlier this week a survey from Consumer Focus Scotland claimed that many people in the Borders had been unaware they would not be getting the full range of digital channels.
The relay transmitter system means many homes can still only get half the channels available elsewhere.
However, the switch will mean a programming bonus in some parts of Dumfries and Galloway.
Homes which do not currently receive digital BBC1 and BBC2 Scotland via their aerial should be able to do so after the change.