Crown Audio IQ-PIP-USP2_CN - Manual (Page 48)

IQ-PIP-USP2/CN
Page 48 IQ-PIP-USP2/CN Reference Manual
In larger Fast Ethernet networks,
additional hubs, concentrators, and
other network hardware are used to
form a larger network, as shown in
Figure 10.11.
Today, commonly available network-
ing cards are 10/100Base-T ca-
pable, which allows them to be used
on either 10BaseT or 100Base-T
networks.
Fast Ethernet distance limitations
apply to CobraNet installations: 100
meters over Cat-5 copper cable, 2
kilometers over multimode fiber. Pro-
prietary Fast Ethernet via single
mode fiber solutions can reach even
further.
10.4.2 Audio Specs
CobraNet implements a fixed sample
rate of 48 kHz. Each channel may be
selected to transmit 16-, 20- or 24-
bit audio data as desired. The trans-
mitter and receiver buffering re-
quired for reliable transmission is
fixed at 256 samples yielding a net-
work transmission latency of
5.333 ms (256 samples at 1/48 kHz
per sample).
10.4.3 The Conductor
A CobraNet system is coordinated
by one of the devices called the
conductor. When two or more
CobraNet devices are intercon-
nected properly, one of the devices
will be elected the network conduc-
tor based on a priority scheme. The
Conductor indicator will light on the
CobraNet device that is serving as
the conductor.
Deterministic transmission on
Ethernet is enabled by a protocol
that implements a “Conductor” for
control of time-division multiplexing
and clock recovery. The “Conductor”
periodically broadcasts a well-de-
fined “beat” packet onto the net-
work for each transmitter and re-
ceiver to recover synchronous tim-
Figure 10.11 Multi-Star Topology