QSC Audio RAVE 80 - Manual (Page 20)

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The RAVE units in a common network select a conductor according to three priorities. The priorities are, from
highest to lowest:
1. Models 161 and 81
2. Models 188 and 88
3. Models 160 and 80
When a unit is connected to the network, it first looks to see if there is a conductor with lower priority already
present. If so, or if there is no conductor present, the unit takes over as conductor. If not, the existing conductor
keeps its job.
If the conductor of a network is removed or taken offline, the remaining RAVE units choose a new conductor
randomly but according to the above three-level order of priority.
Whenever the conductor duties change hands, a network outage tens of milliseconds in duration occurs. The
conductor indicator helps the operator avoid such outages.
Fault
This red LED remains lit for at least 10 seconds whenever the unit detects any non-fatal but unexpected internal
fault.
When a fatal fault is detected, the fault indicator flashes for 10 seconds in combination with channel signal
indicators to display a fault code. The unit will then attempt to reset itself to recover from the fault.
CHANNEL SIGNAL INDICATORS
Also on the front panel are 16 tri-color LEDs. Each one corresponds with an audio channel to indicate its relative
signal level:
Dim green—when the channel is transmitting or receiving audio data over the network and the audio peak
signal level is below -40dBFS (reference: 0 dBFS equals the digital full-scale signal level). Even if the
audio signal is muted or drastically attenuated, the LED will stay lit.
Bright green—when the channel’s peak level is above -40dBFS (40dB below digital full scale).
Yellow—when the signal peaks exceed -12dBFS
Red—when the signal peaks reach -2dBFS and above.
An output channel’s indicator will not light only if it is assigned to a network channel for which there is no input.
In normal operation the channel signal indicators should be flashing bright green or yellow, and perhaps once
in a while a quick flash of red. If an LED stays dim green, the signal level is too low and you’re not taking full
advantage of the digital headroom. If an LED glows red often and for long durations, the signal level is probably
too high and you’ll experience digital “clipping,” which tends to be very harsh. As with any audio device, you should
consider the dynamic nature of the program material in judging the correct level indications.