Studio Technologies 372A, Руководство пользователя

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Issue 1, April 2019 Model 372A User Guide
Page 6 Studio Technologies, Inc.
MODEL 372A
INTERCOM BELTPACK
A broadcast or intercom-style headset with
a dynamic or electret (DC-powered) micro-
phone can be interfaced with the Model 372A
using a 5-pin XLR connector. The Model
372A also directly supports connection of
earbuds or gaming headsets that utilize a
3.5 mm 4-conductor TRRS plug. These mod-
erately priced devices, commonly associated
with mobile phones or personal computers,
are often of high-quality and may be pre-
ferred for some applications. With the Model
372A’s moderate price and ability to support
a broad range of headset devices the overall
cost of deploying an intercom system can
often meet budget goals.
The STcontroller software application is used
to select the unit’s operating parameters. The
talk pushbutton switch can be configured for
optimal operation. Two “push-in/push-out”
(“pop-out”) rotary controls make it easy to set
and maintain the desired headphone output
level. The Model 372A’s compact enclosure
is made from an aluminum alloy which offers
both light weight and ruggedness. A stainless
steel belt clip, located on the back of the unit,
allows direct attachment to a user’s clothing.
The audio quality of the Model 372A is excel-
lent, with low distortion, low noise, and high
headroom. Careful circuit design and rugged
components ensure long, reliable operation.
A wide range of applications can be sup-
ported, including education and commercial
theater, sports and entertainment TV and
radio events, streaming broadcasts, corpo-
rate and government AV, post production,
and aerospace.
Dante Audio-over-Ethernet
Audio data is sent to and received from the
Model 372A using the Dante audio-over-
Ethernet media networking technology. As a
Dante-compliant device, the Model 372A’s
one audio output (Dante transmitter) channel
and two audio input (Dante receiver) chan-
nels can be interconnected (routed) with other
devices using the Dante Controller software
application. The Dante transmitter and re-
ceiver 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 48 kHz. The Model 372A is AES67
compatible and compliant with the Dante
Domain Manager™ software application.
Two bi-color LEDs provide status indications
of the Dante interface. The Dante Identify
command takes on a unique role with the
Model 372A. Not only will it cause the talk
pushbutton’s orange LED to light in a highly
visible sequence, it will also turn off (“kill”)
the talk function if it is active.
Audio Quality
The Model 372A offers “pro” audio perfor-
mance that is not found in typical party-line
(PL) intercom beltpacks. A low-noise, wide
dynamic-range microphone preamplifier and
associated voltage-controlled-amplifier (VCA)
dynamics controller (compressor) ensures
that microphone audio quality is preserved
while minimizing the chance of signal over-
load. DC power to support electret micro-
phones can be enabled as required. The
output of the microphone preamp and com-
pressor is routed to an analog-to-digital con-
verter (ADC) section that supports a sampling
rate of 48 kHz with a bit depth of up to 24.
The audio signal, now in the digital domain,
travels through the processor and on to the
Dante interface section where it is packetized
and prepared for transport over Ethernet.
Audio input signals arrive via two Dante
receiver channels. The supported sampling
rate is 48 kHz with a bit depth of up to 24.
The audio signals pass into the Model 372A’s
processor where channel routing, headphone