Introduction - Studio Technologies 373A User Manual

Introduction

The Model 373A Intercom Beltpack is a highly com-
pact user-worn device that combines a single channel
of talk and two channels of listen. The unit begins with
the features offered by traditional analog party-line
(PL) intercom user devices and adds a range of new
capabilities, along with the advanced performance
and flexibility that Dante
vides. Over a standard IP network, multiple Model
373A and other compatible Studio Technologies' belt-
pack units can be used to create party-line intercom
applications with help from an external Dante-enabled
audio matrix such as the Studio Technologies' Model
5422A Dante Intercom Audio Engine. Alternately,
Model 373A units can be used "point-to-point" or inter-
faced with Dante-compatible matrix intercom systems.
Having one talk and two listen channels may seem un-
conventional. But it can be ideal for many "real-world"
applications. Often an intercom user is primarily
listening and non-verbally responding to requests
made by producers, directors, or stage managers.
Typically, the Model 373A will be configured to be
part of one talk-and-listen party-line intercom channel.
During the time that an event is taking place the listen
function will serve a much more important role; the talk
function will rarely be utilized. However, the second
listen channel will often be important. Typically, it will
be designated as a program-listen or "show audio"
channel. The two listen channels, along with the ability
to receive and display call signals, allow the Model
373A to very effectively support production personnel
in a compact and cost-effective manner.
Only a single Power-over-Ethernet (PoE) connection
is required for operation. Key user features can be
easily configured using the STcontroller software
application. Configurable parameters include electret
microphone powering, microphone preamplifier gain,
Figure 1. Model 373A Intercom Beltpack top and bottom views
Model 373A User Guide
Studio Technologies, Inc.
Model 373A
INTERCOM BELTPACK
audio-over-Ethernet pro-
®
talk button operation, and headphone channel assign-
ment. Features include integrated sidetone, call signal
receive display, and remote mic kill ("talk off"). The
range of capabilities, along with the excellent audio
quality provided by the digital audio signal path, offers
a unique and powerful user experience.
Setting up and configuring a Model 373A is simple.
An etherCON RJ45 jack is used to interconnect with
®
a standard twisted-pair Ethernet port associated with
a local-area network (LAN). This connection provides
both power and bidirectional digital audio. The Model
373A is compatible with both broadcast and "gaming"
headsets.
A broadcast or intercom-style monaural headset with
a dynamic or electret (DC-powered) microphone can
be interfaced with the Model 373A using a 4-pin XLR
connector. The Model 373A also directly supports
connection of stereo earbuds or gaming headsets
that utilize a 3.5 mm 4-conductor TRRS plug. These
moderately priced devices, commonly associated
with mobile phones or personal computers, are often
of high-quality and may be preferred for some appli-
cations. With the Model 373A'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 373A'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 attach-
ment to a user's clothing.
Issue 2. June 2023
Page 5