QSC Audio RAVE 81 Benutzerhandbuch

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.

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.

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.