Manual

Model 205 User Guide Issue 2, October 2018
Studio Technologies, Inc. Page 7
MODEL 205
ANNOUNCER’S CONSOLE
parameters. This allows the unit’s perfor-
mance to be optimized to meet the needs
of specific applications.
The user is presented with three push-
button switches and three push-in/push-
out rotary level potentiometers. This
makes it easy to control the status of
the main and talkback outputs as well
as adjusting the signals that are sent to
the headphone channels.
Ethernet Data and PoE
The Model 205 connects to a local area
network (LAN) by way of a standard
100 Mb/s twisted-pair Ethernet interface.
The physical 100BASE-TX interconnection
is made by way of a Neutrik® etherCON
RJ45 connector. While compatible with
standard RJ45 plugs, etherCON allows a
ruggedized and locking interconnection for
harsh or high-reliability environments.
The Model 205’s operating power is pro-
vided by way of the Ethernet interface
using the 802.3af Power-over-Ethernet
(PoE) standard. This allows fast and ef-
ficient interconnection with the associated
data network. To support PoE power man-
agement, the Model 205’s PoE interface
enumerates (reports) to the power sourc-
ing equipment (PSE) that it’s a class 2 (low
power) device. If a PoE-enabled Ethernet
port can’t be provided by the associated
Ethernet switch a low-cost PoE midspan
power injector can be utilized.
Dante Audio-over-Ethernet
Audio data is sent to and received from
the Model 205 using the Dante audio-over-
Ethernet media networking technology. As
a Dante-compliant device, the Model 205’s
three Dante transmitter (audio output)
channels and four Dante receiver (audio
input) channels can be assigned (routed
or “subscribed”) to other devices using the
Dante Controller software application. The
Dante transmitter and receiver channels
are limited to supporting four Dante flows,
two in each direction. The digital audio’s
bit depth is up to 24 with a sampling rate of
44.1 or 48 kHz. Two bi-color LEDs provide
an indication of the Dante connection sta-
tus. An additional LED displays the status
of the associated Ethernet connection.
The Model 205 is compatible with the
AES67 interoperability standard. In this
mode the three transmitter (output) chan-
nels will function in multicast; unicast is not
supported. In addition, the unit is compat-
ible with the Dante Domain Manager™
(DDM) software application.
Audio Quality
The Model 205’s audio performance is
completely “pro.” A low-noise, wide dy-
namic-range microphone preamplifier and
associated voltage-controlled-amplifier
(VCA) dynamics controller (compressor)
ensures that mic input audio quality is
preserved while minimizing the chance of
signal overload. The output of the micro-
phone preamp and compressor is routed
to an analog-to-digital conversion (ADC)
section that supports sampling rates of
44.1 and 48 kHz with a bit depth of up to
24. The audio signal, now in the digital do-
main, routes through a 32-bit microproces-
sor and on to the Dante interface section
where it is packetized and prepared for
transport over Ethernet.
Audio input signals arrive via the four
Dante receiver channels and pass into the
Model 205’s microprocessor. The sup-
ported sampling rates are 44.1 and 48 kHz
with a bit depth of up to 24. Channel rout-
ing, headphone level control, and sidetone
creation are performed within the digital