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5—S-1608/S-0816 System Overview
S-1608/S-0816 Digital Snake Owner’s Manual 29
To be used in a REAC system, an Ethernet switching hub must meet the following requirements:
• 1000BASE-T transmission speed (IEEE802.3ab, Gigabit Ethernet)
• Support for 100BASE-TX devices (IEEE802.3u, Fast Ethernet)
• Bidirectional (full-duplex) communication
Connect REAC devices only to switching hub ports that support 100BASE-TX.
A/D-D/A Conversion and Signal Optimization
Before an analog audio signal can be transmitted through REAC, it must first be converted to digital
data. Once in digital form, the audio is sent down the Ethernet cable to the receiving REAC device.
When it arrives there, the signal is converted back to analog for connection to an audio device such as
an analog mixing console. This process of turning analog audio into digital data and back again is
called
analog-to-digital
(A/D) and
digital-to-analog
(D/A) conversion.
The S-1608 and S-0816 units employ extremely high-quality 24-bit/96 kHz A/D and D/A converters on
all audio inputs and outputs for the very best possible sound quality.
Additionally, the S-1608/S-0816 system provides variable gain preamps on each of its 24 audio inputs.
This allows for signal optimization at the source, resulting in the highest A/D conversion quality.
RS-232C Serial Interface
The S-1608 and S-0816 feature REMOTE connectors that support the RS-232C serial interface
protocol. RS-232C is a standard communications interface found in computers.
The S-1608/S-0816 System can be controlled from a remote device utilizing RS-232C, such as the
included S-4000R Remote Controller or a personal computer running the S-4000 Remote Control
Software (S-4000 RCS).
The transmission protocol for REAC is based on 100BASE-TX (Fast Ethernet). To transfer up to 40
channels of digital audio, REAC uses the full bandwidth of this protocol. However, some 100BASE-TX
switching hubs cannot handle this amount of data traffic. Gigabit Ethernet switching hubs can handle
a larger amount of data traffic, so we recommend them for use with REAC devices (just be sure that
the Gigabit switching hub you use supports 100BASE-TX devices).
Consult the switching hub’s documentation for information on its proper use.
If RS-232C devices are connected to the REMOTE connectors on both the S-1608 and S-0816, the
system can be controlled from either device (though only one remote device can control the system at
any given time).
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