Mute LED:
Lights red when the system is muted (press the Set button in Status
Mode), or in technically critical conditions.
Limit LED:
Lights yellow when the limiter is limiting one or more amplifier chan-
nels.
Signal LED:
Lights green when a signal of more than -20 dBu is present. The LED
still lights up when the system is muted.
Power LED:
Lights when the system is powered up.