Manual

Issue 2, August 2019 Model 370A User Guide
Page 8 Studio Technologies, Inc.
MODEL 370A
INTERCOM BELTPACK
Getting Started
What’s Included
Included in the shipping carton are a Model
370A Intercom Beltpack and a printed copy
of this guide. As a device that is Power-
over-Ethernet (PoE) powered, no external
power source is provided. In most applica-
tions an Ethernet switch with the required
PoE capability will be utilized.
Connections
In this section signal interconnections will
be made using the two connectors located
on the bottom of the Model 370A’s enclo-
sure. An Ethernet data connection with
Power-over-Ethernet (PoE) capability will
be made using either a standard RJ45
patch cable or an etherCON protected
RJ45 plug. A dual-channel or single-
channel (dual- or single-ear) headset
will be connected using a cable-mounted
5-pin male XLR connector.
Ethernet Connection with PoE
A 100BASE-TX Ethernet connection that
supports Power-over-Ethernet (PoE) is
required for Model 370A operation. This
one connection will provide both the Ether-
net data interface and power for the Model
370A’s circuitry. A 10BASE-T connection is
not sufficient and a 1000BASE-T (“GigE”)
connection is not supported unless it can
automatically “fall back” to 100BASE-TX
operation. The Model 370A supports Eth-
ernet switch power management, enumer-
ating itself as a PoE class 1 device. Any
source that is compliant with the IEEE®
802.3af standard will function correctly.
Should the selected Ethernet switch port
support Energy-Efficient Ethernet (EEE) it
must be disabled to help ensure reliable
Dante operation.
The Ethernet connection is made by way of
a Neutrik etherCON protected RJ45 recep-
tacle that is located on the bottom of the
Model 370A’s enclosure. This allows con-
nection by way of a cable-mounted ether-
CON connector or a standard RJ45 plug.
The Model 370A’s Ethernet interface sup-
ports auto MDI/MDI-X so that a crossover
cable will never be required.
Headset Connection
The Model 370A provides a 5-pin female
XLR connector that interfaces with the
microphone and headphone connections
of an intercom or broadcast-style headset.
Refer to Figure 2 for connection details.
The microphone input connections are
compatible with most unbalanced dynamic
or electret (low-voltage DC-powered) mi-
crophones. A balanced dynamic micro-
phone should, in most cases, also function
correctly if its signal – (low) is connected to
Model 370A’s mic in –/shield connection.
No support is provided for microphones
that require P12 or P48 phantom power.
To allow users of stereo (dual-earpiece or
“double muff”) headsets to hear a monau-
ral version of the two headphone output
channels does not require special wiring of
the 5-pin male XLR mating connector. The
headset’s left headphone channel should
Figure 2. Headset connection pinout chart