Manual

Model 44D User Guide Issue 3, August 2018
Studio Technologies, Inc. Page 9
would be for the 20 kHz tone to be used to
serve as an activation signal for contact clo-
sures. Using Dante subscriptions (routes),
the intercom channel from the matrix in-
terface would be connected to additional
Model 44D units. When those units receive
the 20 kHz tone signal they would enable
their associated GPO contact closure.
Both the 18 kHz and 20 kHz tones are pre-
cise in terms of frequency and level accu-
racy, as well as being very low in harmonic
distortion.
Ethernet Data, PoE, and DC
Power Source
The Model 44D connects to a data network
using a standard 100 Mb/s twisted-pair
Ethernet interface. The physical intercon-
nection is made by way of a Neutrik®
etherCON RJ45 connector. While compat-
ible with standard RJ45 plugs, etherCON
allows a ruggedized and locking intercon-
nection for harsh or high-reliability environ-
ments. The Model 44D’s operating power
can be provided by way of the Ethernet
interface using the Power-over-Ethernet
(PoE) standard. This allows fast and ef-
ficient interconnection with the associated
data network. To support PoE power man-
agement, the Model 44D’s PoE interface
reports to the power sourcing equipment
(PSE) that it is a class 1 (very low power)
device. The unit can also be powered us-
ing an external source of 12 volts DC. Four
LEDs on the back panel display the status
of the network connection, Dante interface,
and PoE power source.
Simple Installation
The Model 44D uses standard connec-
tors to allow fast and convenient intercon-
nections. An Ethernet signal is connected
using a Neutrik etherCON RJ45. If Power-
over-Ethernet (PoE) is available operation
will commence immediately. An external
12 volt DC power source can also be con-
nected by way of a 4-pin XLR connector.
Line input and line output connections are
made using 3-pin XLR connectors. A 9-pin
female D-subminiature (DE-9F) connec-
tor provides access to the two GPI, two
GPO, and auxiliary DC output functions.
The Model 44D is housed in a rugged yet
lightweight aluminum enclosure that is de-
signed to be “field tough.” It can be used
as a standalone portable unit, supporting
what’s 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 44D was designed so that its
capabilities can be enhanced in the future.
A USB connector, located on the unit’s
main circuit board (underneath the unit’s
cover), allows the application firmware
(embedded software) to be updated using
a USB flash drive.
To implement the Dante interface the
Model 44D uses Audinate’s Ultimo™
integrated circuit. The firmware in this
integrated circuit can be updated via the
unit’s Ethernet connection, helping to en-
sure that its capabilities remain up to date.
Getting Started
In this section signal interconnections will
be made using the variety of connectors
located on the Model 44D’s back panel.
Connections to the two line inputs and two