At various times of day, after receiving a good picture for approx 30 minutes, the picture freezes, breaks up and reverts back to analogue. The light on the front stays green.Digital service may be restored starting from the beginning.
I have recently upgraded my aerial and the clarity of picture, composition of teletext is excellent when received. It is just the loss of digital service which frequently happens. Post code is EX6 8SY. I would appreciate any advice given.

Televison & Video - Alba - DVBT set top box