Manual

Model 374A User Guide Issue 3, August 2019
Studio Technologies, Inc. Page 9
MODEL 374A
INTERCOM BELTPACK
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 always be wired to pin 4 and the
right headphone channel to pin 5. Con-
figuration choices, discussed later in this
guide, can then be used to create the
desired monaural output. It’s important
not to connect together (short) pins 4 and
5 of the Model 374A’s headset connector
as damage to the Model 374A’s output
circuitry could result.
Monaural (single-earpiece or “single
muff”) headsets should be wired such that
its headphone is wired only to pin 4; pin 5
should be remain unused. Configuration
choices, discussed later in this guide, can
be used to create a monaural output.
It’s possible that some Beyerdynamic
headset interconnecting cable assemblies
terminate the earpiece’s left and right con-
nections opposite from what the Model
374A and other broadcast equipment
require. These cables may terminate the
left earpiece to pin 5 of the XLR connec-
tor and the right earpiece to pin 4. If this
condition is present it will require reversing
or “flipping” the two wires in a headset’s
5-pin male XLR connector such that the left
earpiece connects to pin 4 and the right
earpiece to pin 5.
Dante Configuration
For audio to pass to and from the Model
374A requires that several Dante-related
parameters be configured. These configu-
ration settings will be stored in non-volatile
memory within the Model 374A’s circuitry.
Configuration will typically be done with
the Dante Controller software application
which is available for download free of
charge at www.audinate.com. Versions of
Dante Controller are available to support
Windows® and OS X® operating systems.
The Model 374A uses the Ultimo 4-input/
4-output integrated circuit to implement
the Dante architecture.
The four Dante transmitter (Tx) channels
associated with the Model 374A’s Dante
interface must be assigned to the desired
receiver (Rx) channels. This achieves rout-
ing the Model 374A’s four talk output audio
channels to the device (or devices) that will
be “listening” to them. Within Dante Con-
troller a “subscription” is the term used for
routing a transmitter flow (a group of out-
put channels) to a receiver flow (a group of
input channels). The number of transmitter
flows associated with an Ultimo integrated
circuit is limited to two. These can either be
unicast, multicast, or a combination of the
two. If the Model 374A’s transmitter chan-
nels need to be routed using more than
two flows it’s possible that an intermediary
device, such as the Studio Technologies’
Model 5422 Dante Intercom Audio Engine,
can be used to “repeat” the signals.
Figure 2. Headset connection pinout chart