The silence detector alarms when programme audio drops below a set level for a set time.
- Listen to the off-air monitor straight away. Is it really silent, or just a very quiet piece (a fade, a quiet intro, speech with long pauses)?
- If it's genuine dead air, follow Dead air or off air: what to check first.
- If the automatic backup audio has kicked in, the station is still on air. Find and fix the main fault, then switch back to normal programming.
- Log it: the time, how long it lasted, and the cause. Repeat alarms point to a fault worth a problem record.
If quiet content keeps triggering false alarms, ask engineering to review the alarm's threshold and delay rather than switching it off.