Studio Technologies 45DR - Manual (Page 6)

Issue 2, January 2015 Model 45DR User Guide
Page 6 Studio Technologies, Inc.
during setup and operation. Support for
transporting call light signals between
Model 45DR units is also provided.
Standard connectors are used for party-line
intercom, Ethernet, and DC power inter-
connections. The Model 45DR’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 45DR units can
be mounted in a single space (1U) of a
standard 19-inch rack enclosure.
Applications
There are two main ways that the Model
45DR can be used in applications: adding
party-line intercom support for matrix inter-
com systems and linking two stand-alone
party-line intercom circuits. Ports on matrix
intercom systems that support Dante, such
as the RTS ADAM with OMNEO, can be
routed to the Model 45DR’s Dante input
(receiver) and output (transmitter) chan-
nels. The Model 45DR’s circuitry will then
convert these signals into a 2-channel
party-line intercom circuit. In this way add-
ing party-line support to RTS + OMNEO is
a simple task. The Model 45DR can also
be used with matrix intercom systems that
don’t support Dante. An external analog-
to-Dante interface can be used to convert
analog intercom ports to Dante channels.
Once in the digital domain, these Dante
channels can be interconnected with the
Model 45DR’s audio input and output
channels.
Two separate party-line intercom circuits
can easily be interconnected using two
Model 45DR Interfaces. A Model 45DR is
connected to each party-line circuit as well
as the Dante network. The Dante Controller
software application will then be used to
route the audio channels between the two
units. That’s it — nothing else is required
to achieve excellent performance.
The Model 45DR can also be used to
“bridge” a 2-channel party-line intercom
circuit with one or two single-channel
party-line intercom circuits. This involves
using a Model 45DR with the 2-channel
circuit and one or two of the Studio Tech-
nologies Model 45DC Intercom Interface
units with the single-channel circuits. The
Model 45DC is the “cousin” of the Model
45DR and supports two single-channel
party-line intercom circuits rather than one
2-channel circuit. These single-channel
circuits, typically supported by equipment
from Clear-Com®, are commonly used in
theatrical and entertainment applications.
Party-Line Interface
The Model 45DR’s party-line intercom
interface is optimized for connection with
2-channel party-line intercom circuits and
user devices such as the TW-series from
RTS. In addition, other industry-standard
single- and 2-channel party-line intercom
circuits and user devices, including those
from Clear-Com, are compatible. (While
the Model 45DR will function in a limited
manner with single-channel Clear-Com
circuits, the Model 45DC Intercom In-
terface is the much-preferred choice for
that.) A party-line active detection function
ensures that should a user beltpack or
active party-line circuit not be connected
the Model 45DR’s interface circuitry will
remain stable. This unique feature makes
certain that objectionable audio signals,
including oscillations and “squeals,” won’t
be sent to other Dante-enabled devices.