Manual
Table Of Contents
Model 44D User Guide Issue 3, August 2018
Studio Technologies, Inc. Page 17
integrated circuit limits the number of Dante
flows to two. These can either be unicast,
multicast, or a combination of the two.
The Model 44D has a default Dante device
name of ST-M44D followed by a unique suf-
fix. The suffix identifies the specific Model
44D that is being configured. The suffix’s
actual alpha and numeric characters relate
to the MAC address of the Ultimo integrated
circuit that’s present in the specific Model
44D. The two Dante receiver (input) chan-
nels have the default names of Ch1 and
Ch2. The two Dante transmitter (output)
channels also have the default names of
Ch1 and Ch2. Using Dante Controller these
names can be revised as appropriate for
the specific application.
The Model 44D supports audio sample
rates of 44.1 and 48 kHz along with sev-
eral pull-up/pull-down values. The desired
configuration can be made using the Dante
Controller software application. The Model
44D can serve as the clock master for a
Dante network but in most cases that would
not be optimal.
Switch SW4, located on the back panel, is
used to configure Model 44D’s operating
mode. When selected for the tone gen-
erator mode (SW4 on (up)) normal audio
interface operation will not take place. The
unit’s internal processor will generate two
sine-wave audio signals (tones). The two
Dante transmitter (output) channels should
be assigned to the desired destinations.
The two Dante transmitter (output) chan-
nels will have the default names of 18kHz
and 20kHz. Signals routed to the two Dante
input (receiver) channels will not cause any
Model 44D activity to take place. The two
Dante receiver (input) channels will have
the defaults names of Ch1–Inactive and
Ch2–Inactive.
Operation
At this point the Model 44D should have
its Ethernet, line input, line output, and
GPI/GPO connections implemented as
desired for the application. Depending on
the capabilities of the Ethernet connection
an external 12 volt DC power connection
may have also been made. The two Dante
transmitter (output) channels and two
Dante receiver (input) channels should
have been routed using the Dante Control-
ler software application. Normal operation
of the Model 44D can now begin.
The Model 44D is designed for continuous
operation with no adjustments required.
Maintaining the correct signal levels com-
ing into the line inputs and Dante receiver
channels is important. This will ensure
that proper signal levels are presented
to the Model 44D’s circuitry and associ-
ated equipment, leading to optimal audio
performance. The audio level meters and
GPO status LEDs will provide assistance
in confirming that correct operation is tak-
ing place.
Initial Operation
The Model 44D will begin its initial func-
tioning a few seconds after its power
source is connected. As previously dis-
cussed, the unit’s power source can be
provided by Power-over-Ethernet (PoE) or
an external source of 12 volts DC. If both
are connected the PoE source will power
the unit. Should PoE power subsequently
no longer be available, uninterrupted op-
eration will continue using the external 12
volt DC source. (This will probably prove
to be a “hollow” victory since a loss of
PoE will probably also mean a loss of the
required Ethernet data connection!)