Manual

Issue 3, August 2018 Model 44D User Guide
Page 6 Studio Technologies, Inc.
performance, strong interoperability, and
wide adoption by a large number of equip-
ment manufacturers. The Model 44D is a
general-purpose “tool” that helps to ex-
pand Dante’s capabilities to facilities and
equipment that primarily supports signals
in the analog domain.
Careful attention to circuit design and
component selection ensures that excellent
audio quality is maintained. Extensive filter-
ing helps prevent damage or less-than-
optimal performance should DC voltage,
ESD (“static”), or strong RF signals be
present on the associated analog signals.
Configuration switches allow several Model
44D operating parameters to be selected.
The nominal audio levels of the line input
and line output functions can be indepen-
dently selected. In this way compatibility
with SMPTE® and EBU nominal signal
levels is supported. Audio level meters pro-
vide confirmation of system performance
during setup and operation. Two general
purpose input and two general purpose
output functions allow support for installer-
selected applications, including party-line
intercom call-light functions. Two LEDs
provide a direct indication of the status
of the GPO functions.
The Model 44D can be powered by Power-
over-Ethernet (PoE) or an external source
of 12 volts DC. Standard connectors
are used for the line inputs and outputs,
Ethernet, GPI/GPO, and DC power inter-
connections. The Model 44D’s enclosure
has a “1/2-rack” 1U form factor and weighs
less than two pounds, making it well suited
for use in portable applications. Alternately,
using one of the optional rack-mount front
panels, one or two Model 44D units can be
mounted in a single space (1U) of a stan-
dard 19-inch rack enclosure.
Dante Audio-over-Ethernet
Audio data is sent to the Model 44D us-
ing the Dante audio-over-Ethernet media
networking technology. Audio signals with
a sample rate of 44.1 or 48 kHz and a bit
depth of up to 24 are supported. The two
line input channels are converted to digital
and then routed to transmitter (output) chan-
nels on the Dante interface. Two transmitter
(output) channels from an associated Dante-
enabled source device can be assigned
to the Model 44D’s receiver (input) chan-
nels using the Dante Controller application.
These are then converted into analog out-
puts.
Applications
The most basic application for Model 44D
is for transporting analog audio signals to
and from one location to another using
the data transport resources of a local area
network — there’s really no simper means
to getting high-quality audio from “point A
to point B” and back. With standard connec-
tors and PoE power, setup can be complet-
ed in just a few minutes. This makes Model
44D units effective in both fixed and portable
applications.
The Model 44D can also find use when an
application already supports Dante. For
example, ports on a matrix intercom sys-
tem that directly supports Dante, such as
the RTS® ADAM® with OMNEO®, can be
routed to a Model 44D’s Dante output (trans-
mitter) and input (receiver) channels. The
Model 44D will then provide two analog input
and two analog output interfaces for use in
a variety of applications. These can include
interfacing with audio inputs and outputs as-
sociated with audio consoles, providing tal-
ent cueing (IFB) feeds, and interfacing with
the audio outputs of aerial camera systems.