The 600,000 Irish householders who use SAORVIEW are being advised to re-scan their equipment today or face losing the service.
Technical improvements to SAORVIEW will mean that viewers can enjoy an improved HD service.
From today and for two weeks afterwards, viewers are advsied to re-scan their SAORVIEW equipment, which SAORVIEW said is "simple and should take no more than a couple of minutes by using the settings on either the television or Set-Top Box".
Instructions for re-tuning your SAORVIEW box are here.