Datasheet

DDM and AES67
The Model 48D is compliant with the Dante Domain
Manager software application. However, there is no require-
ment that each of the two network interfaces be part of a
DDM domain. One of the Model 48D’s network interface’s
can utilize the security resources of DDM while the other
remains “open.” Each of the Model 48D’s network inter-
face’s can be configured to support, or not support, AES67
digital audio signals. This allows a Model 48D to serve in
a unique Dante-to-AES67 bridge function. However, note
that when AES67 support is enabled for an interface the
sample rate will be fixed at 48 KHz.
Pro Audio Quality
The Model 48D’s audio circuitry was designed to meet the
demands of professional audio applications. Audio data
passing between the two network interfaces remains within
the digital domain. To achieve audio data synchronization
between the two networks high-performance sample-
rate-converter (SRC) integrated circuits are utilized. This
allows compatibility between widely-divergent sample
rates while maintaining low-distortion, low-noise, and high
headroom.
Status LEDs and LCD Display
On the front panel the Model 48D provides four LED indi-
cators, a 2-line back-lit LCD display, and five pushbutton
switches. Two of the LEDs indicate the status of the input
power sources. The other two LEDs are associated with
the two network interfaces. The LCD display allows a
number of operating conditions to be monitored, including
firmware version numbers, network parameters, and Dante
operating characteristics. The pushbutton switches can
be used to select which menu page is displayed as well
as allowing key network parameters to be revised. These
include the IP configuration methods, IP addresses, and
subnet mask values. Six LEDs on the back panel indicate
the status of the two network connections and associated
Dante interfaces.
Ethernet Data and Power Source
The Model 48D interconnects with two independent local-
area-networks (LANs) using standard 100 Mb/s twisted-
Studio Technologies, Inc. Model 48D Dante Bridge, Issue 1, Page 3
pair Ethernet signals. The physical connections are made
by way of two Neutrik® etherCON RJ45 receptacles. While
compatible with standard RJ45 plugs, etherCON allows
a ruggedized and locking interconnection for harsh or
high-reliability environments. The Model 48D’s operating
power can be provided by a Power-over-Ethernet (PoE)-
compliant Ethernet signal that’s connected to the Model
48D’s Network A interface. For network management
purposes the interface will report to the power sourcing
equipment (PSE) that it is a class 1 (very low power) device.
If PoE is not available the unit can also be powered using
an external source of 12 volts DC.
Simple Installation
The Model 48D is housed in a rugged yet lightweight
aluminum enclosure that is designed 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. Optional rack-mounting installation kits
are available to allow one or two units to be mounted
in one space (1U) of a standard 19-inch rack enclosure.
As previously mentioned the Model 48D uses standard con-
nectors to allow fast and convenient interconnections. Two
Ethernet signals are connected using Neutrik etherCON
RJ45 receptacles. Operation will commence immediately
if Power-over-Ethernet (PoE) is available on the Ethernet
connection associated with the Network A interface.
A 12 volt DC power source can also be connected by way
of a 4-pin XLR connector.
Future Capabilities and Firmware
Updating
The Model 48D was designed so that its performance and
capabilities can be enhanced in the future. A USB connec-
tor, accessible on the unit’s back panel, allows the main
firmware (embedded software) to be updated using a USB
flash drive. To implement its Dante interfaces the Model
48D uses two of Audinate’s Ultimo™ integrated circuits.
The firmware in these integrated circuits can be updated
via the unit’s two Ethernet connections, helping to ensure
that the Dante capabilities remain up to date.