QSC RAVE 88 User Manual download pdf (Page 19)

SLAVE INPUT

The slave input is another BNC jack. Its use is to allow a RAVE unit to “slave” itself to another RAVE unit, as a

backup in mission-critical applications.

To slave one RAVE unit to another, connect a BNC jumper

cable from the sync output of the main unit to the slave

input of the redundant unit. Select the same network

channel(s) on the slave unit as are selected on the main

unit. As long as the slave input detects the clock signal

from the main RAVE unit, it will maintain a sort of

“standby” mode, i.e., if it has analog audio outputs, the

output relays will stay open to prevent the production of

audio signals; if it has digital audio outputs, the bitstream

will continue, but the audio information will be as if the

audio channels were muted; if it has analog or digital

audio inputs, the unit will not transmit data on the

network.

However, once the clock signal disappears, as would

happen if the main unit detects an internal fault, loses

its network connection, or just fails, the slave unit will

go into normal operation. If the clock signal re-ap-

pears, the slave unit will go back to its standby role.

RS232 PORT

The RS232 port is an auxiliary function which allows

you to transmit serial data over the RAVE network,

from one RAVE unit to another. This is handy for

remotely controlled accessories and processors that

use RS232 data.

Serial data format is fixed at 19,200 baud, 9 bits (or 8

bits w/ parity), 1 stop bit.

Incoming serial data is buffered and broadcast over

the network. All attached stations receive these broad-

casts and transmit the data simultaneously out their

respective serial ports.

When the RS232 electrical connection is in use, the

serial port operates in a half duplex mode.

For pinout information, see the Appendix.

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QSC RAVE 88 User Manual Page 19