The last analogue television signals in the STV North television region have been switched off.
The switch to digital affects about 70,000 homes across Inverness and the Great Glen.
Shortly after midnight, analogue BBC One, STV, Channel 4 and Five were turned off permanently at the Rosemarkie transmitter group.
Extra channels are being broadcast from 12 local relay transmitters serving thousands of homes.
The changes also affect existing Freeview viewers who may have found some of their channels missing.
Digital UK said the services have moved to new frequencies and could be restored by retuning Freeview televisions and boxes.
Paul Hughes, Digital UK's national manager in Scotland, said it was a historic day for the north of Scotland.
He added: "Viewers across the STV North region now have a greater choice of TV services and many are enjoying the benefits of digital television for the first time.
"As with any change on this scale, some people may need a bit of extra help so we and the Help Scheme are on hand to give advice and assistance to those who may need it."