Studio Technologies 45DC - Manual (Page 6)

Issue 1, January 2015 Model 45DC User Guide
Page 6 Studio Technologies, Inc.
can also connect with one or two existing
powered and terminated intercom circuits.
Audio level meters provide confirmation
of system performance during setup and
operation. Support for transporting call
light signals between Model 45DC units is
also provided.
Standard connectors are used for party-
line intercom, Ethernet, and DC power
interconnections. The Model 45DC’s
enclosure has a “1/2-rack” 1U form factor
and weighs less than two pounds, making
it well suited for use in portable applica-
tions. Alternately, using one of the optional
rack-mount front panels, one or two Model
45DC 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
45DC can be used in applications. The
first is to add party-line intercom support
for matrix intercom systems. The second
is to link two stand-alone party-line inter-
com systems. Ports on matrix intercom
systems that support Dante, such as the
RTS ADAM with OMNEO, can be routed to
the Model 45DC’s Dante input (receiver)
and output (transmitter) channels. The
Model 45DC’s circuitry will then convert
these signals into two single-channel par-
ty-line intercom circuits. In this way adding
party-line support to RTS + OMNEO is a
simple task. The Model 45DC 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 45DC’s audio input and output
channels.
Two separate sets of party-line intercom
circuits can easily be interconnected using
two Model 45DC Interfaces. At each end
a Model 45DC is connected to one or two
party-line circuits as well as the Dante
network. The Dante Controller applica-
tion 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 45DC can also be used to
“bridge” two single-channel party-line
intercom circuits with one 2-channel party-
line intercom circuit. This involves using
a Model 45DC for the two single-channel
circuits and one of the Studio Technolo-
gies Model 45DR Intercom Interface units
for the 2-channel circuit. The Model 45DR
is the “cousin” of the Model 45DC and
supports one 2-channel party-line inter-
com circuit rather than two single-channel
circuits. These 2-channel circuits, typically
supported by equipment from RTS, are
commonly used in broadcast applications.
Party-Line Interfaces
The Model 45DC’s two party-line intercom
interfaces are optimized for connection
with two single-channel party-line circuits
and user devices such as those associat-
ed with equipment from Clear-Com. (While
the Model 45DC will function in a limited
manner with a 2-channel RTS TW circuit,
the Model 45DR Intercom Interface is the
much-preferred choice.) Each interface
has a party-line active detection function
to ensure that should a beltpack or ac-
tive party-line circuit not be connected
the Model 45DC’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.