S-4000 Digital Snake Owner’s Manual 77
7—Advanced Use
As mentioned earlier in the manual, some switching hubs have ports that allow the use of
either crossover or straight-through cables—they will detect the type of cable that’s connected
and adjust the signal transfer accordingly. Consult the documentation for the switching hub to
determine what type of cables can be used.
If you connect both the MAIN and BACKUP REAC ports to a single switching hub, you are
weakening the redundancy of the system somewhat—if the switching hub fails, both the MAIN
and BACKUP connections fail along with it. Therefore, in critical installations you may want to
consider using separate switching hubs for the MAIN and BACKUP REAC device connections.
Audio Connections and Power Up
Connect and power up devices in the following order:
In each of the following steps, allow each piece of equipment to finish its power-up sequence
before proceeding to the next step.
1. Connect the system components as described here and in Chapter 6.
2. Connect audio devices to the Master and Slave REAC devices’ inputs and outputs.
3. Connect audio devices to the Split REAC devices’ outputs.
S-4000S and S-4000H audio connections are explained in Chapter 6.
4. Turn on any devices connected to the Master and Slave REAC devices’ audio inputs.
5. Turn on the power on the switching hub(s).
6. Turn on the front panel power switches on the Master, Slave, and Split devices so that their INT
indicators light.
7. Turn on the power to the audio devices (mixing consoles, power amplifiers, monitor speakers,
etc.) connected to the Master, Slave, and Split devices’ audio outputs.
Notes on Split Setups
• A Split REAC device can only receive audio from the Master REAC device—it can’t receive audio
from a Slave REAC device (or another Split device).
• When a unit is set as a Split REAC device, its audio inputs are disabled.
• An S-4000R can be connected to the REMOTE connector on a Split REAC device. However, it
can only be used for system and signal level monitoring—adjustment of S-4000S inputs is not
possible. (If you need to adjust the signal level coming from a Split device’s outputs, use the input
trim controls on the receiving device.)
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