Studio Technologies 45DC - Manual (Page 9)

Model 45DC User Guide Issue 1, January 2015
Studio Technologies, Inc. Page 9
known in the broadcast world as “throw-
down” applications. Rack-mount options
are also available allowing one or two
units to be mounted in one space (1U) of
a standard 19-inch rack enclosure.
Future Capabilities and
Firmware Updating
The Model 45DC was designed so that its
capabilities can be enhanced in the future.
A USB connector, located on the Model
45DC’s back panel, allows the applica-
tion firmware (embedded software) to be
updated using a USB flash drive. To imple-
ment the Dante interface the Model 45DC
uses Audinate’s Ultimo™ integrated cir-
cuit. The firmware in this integrated circuit
can be updated via the Ethernet connec-
tion, helping to ensure that its capabilities
remain up to date.
Installation
In this section signal interconnections will
be made using the connectors located on
the back panel of the Model 45DC. Con-
nections to one or more party-line user
devices or one or two existing party-line
intercom circuits will be made using the
3-pin XLR connectors. An Ethernet data
connection will be made using either a
standard RJ45 patch cable or an ether-
CON protected RJ45 plug. A 4-pin XLR
connector allows the connection of an
external source of 12 volts DC.
System Components
Included in the shipping carton are the
Model 45DC Intercom Interface and a user
guide. If a rack-mount front panel is going
to be used as part of the installation it will
typically be shipped in a separate carton.
If the installation or specific application re-
quires an external source of 12 volts DC it
needs to be provided separately. An appli-
cable power supply, the Studio Technolo-
gies PS-DC-02, is available as an option.
Locating the Model 45DC
The location of the Model 45DC will de-
pend on the length of the cable runs
needed to link the unit with the associated
party-line intercom devices. This type of
circuit carries unbalanced audio which can
be susceptible to interference and cross-
talk issues. And since party-line intercom
circuits typically carry DC power a voltage
drop due to resistive loss can become an
issue. In general, minimizing the length
of the party-line intercom cables will help
ensure more reliable and consistent inter-
com system performance. Of equal impor-
tance is the 100-meter (325-foot) Ethernet
cable limitation. A final location criterion is
to ensure that access to the Model 45DC’s
front panel is available. An optimal location
will allow convenient use of the auto null
pushbutton and easy observation of the
status and level meters LEDs.
Protecting the Enclosure
The Model 45DC is shipped as a self-
contained unit suitable for portable use
or placement in a semi-permanent loca-
tion. Installed on the bottom of the chassis
are screw-on “bump on” protectors (also
known as “rubber feet”). These are useful
if the unit is going to be placed on surfaces
where scratching of either the Model 45DC
or the surface material could take place.
The “feet” can be removed, without the use
of a tool, when rack- or custom-mounting
the unit.