You can schedule an alarm inversion action (switching to On or to Off). When you schedule an inversion action, you configure the system to change the Inverted mode at a set time and then to switch back at another set time. Scheduled inversion actions occur during a Grace period. The purpose of the Grace period is to provide a buffer span of time during which the alarm state is ignored. Without a Grace period the following scenario could happen: If a channel goes off-air at 02:00 and there is a scheduled inversion changing a Freeze alarm to Non-freeze at 02:00, but the feed doesn’t stop until five seconds later, the Non-freeze alarm will go red for five seconds and may trigger unwarranted actions. A Grace period ignores these transitional alarm states and prevents unwanted behaviors.

Each scheduled inversion action (either switching to On or to Off) occurs exactly at the midway point of a Grace period. For example, if we assume the Grace period is set to 60s, and there is an alarm inversion scheduled for 06:00, a Grace period will begin at 05:59:30 and end at 06:00:30. During this Grace period, the alarm’s state is ignored.

When you configure a scheduled alarm inversion, you can choose whether to configure a set duration during which the alarm is inverted. If a scheduled alarm inversion action does not have a set duration, only the first Grace period (the one in which the alarm becomes inverted) applies. Scheduled alarm inversions with no set duration require an operator to manually switch the Inverted mode of an alarm back to Off.