SP
For most stations the same silence detector at the transmtter goes back to studio output when audio returns.
For BBC Network radio, the backup is at Broadcasting House rather than each transmitter having its own. To get back on air cleanly, the studio (or the studio taking over from the one that died) needs to:
Contact London Control Room and get a feed of the emergency tape as an Outside Source
Fade up that OS and set the levels
Ask LCR to put the studio on air
Fade out the emergency tape and carry on.
A bit of a faff, so there is usually an emergency playlist or similar available in the studio so in the event of an evacuation they can play the local copy and get back to normal much more quickly afterwards.
I'm sure I've heard before, on some stations at least, once you have the backup tape playing it can be tricky to get it to go off.
For most stations the same silence detector at the transmtter goes back to studio output when audio returns.
For BBC Network radio, the backup is at Broadcasting House rather than each transmitter having its own. To get back on air cleanly, the studio (or the studio taking over from the one that died) needs to:
Contact London Control Room and get a feed of the emergency tape as an Outside Source
Fade up that OS and set the levels
Ask LCR to put the studio on air
Fade out the emergency tape and carry on.
A bit of a faff, so there is usually an emergency playlist or similar available in the studio so in the event of an evacuation they can play the local copy and get back to normal much more quickly afterwards.