Studio Technologies 48D Dante Manuel utilisateur
Copyright © 2018 by Studio Technologies, Inc., all rights reserved
www.studio-tech.com
50666-0718, Issue 2
User Guide
Issue 2, July 2018
This User Guide is applicable for serial numbers
M48D-00151 and later with application firmware 1.1 and later
and Dante firmware 1.0.0 (UltimoX4 4.1.2.1)
Model 48D Dante® Bridge
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Model 48D User Guide Issue 2, July 2018
Studio Technologies, Inc. Page 3
Table of Contents
Revision History ................................................................... 4
Introduction ........................................................................... 5
Getting Started ..................................................................... 8
Configuration ........................................................................ 11
Operation .............................................................................. 15
Technical Notes .................................................................... 19
Specifications ....................................................................... 22
Appendix A–Model 48D Front-Panel LCD Display
Menu Structure ..................................................................... 23
Appendix B–Graphical Description of Model 48D
Rack-Mount Installation Kit for One Model 48D Unit
(Order Code: RMBK-11) ....................................................... 24
Appendix C–Graphical Description of Model 48D
Rack-Mount Installation Kit for Two Model 48D Units
(Order Code: RMBK-12) ....................................................... 25
Issue 2, July 2018 Model 48D User Guide
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Revision History
Issue 2, July 2018:
1. Added additonal content.
Issue 1, July 2018:
1. Initial release.
Model 48D User Guide Issue 2, July 2018
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Introduction
The Model 48D Dante® Bridge provides
a simple yet high-performance means of
interconnecting, or “bridging,” Dante audio
signals associated with two independent
local-area-networks. The unit allows up to
four audio channels to pass in each direc-
tion. Internal circuitry provides timing and
bit-depth correction to ensure that audio
signal integrity is maintained.
Dante audio-over-Ethernet has found wide
acceptance as a network “backbone” due
to its ease of use, excellent audio perfor-
mance, strong interoperability, and wide
adoption by a large number of equipment
manufacturers. However, interconnecting
audio signals on independent local-area-
networks that support Dante can present
a challenge. The Model 48D makes that a
simple task to implement. Interconnecting
a Model 48D with two Ethernet connec-
tions, along with a minimal amount of
configuration, is all that’s required to make
the unit part of a sophisticated, networked
audio system.
The Model 48D can be powered by Power-
over-Ethernet (PoE) or an external source
of 12 volts DC. Standard connectors are
used for the Ethernet and DC power inter-
connections. The Model 48D’s enclosure
has a “1/2-rack” 1U form factor and weighs
less than two pounds, making it well suited
for use in portable applications. Alternately,
using one of the optional rack-mounting
kits one or two Model 48D units can be
mounted in a single space (1U) of a stan-
dard 19-inch rack enclosure. The unit is
built to professional standards and is in-
tended for demanding 24-hour operation.
The Dante Controller software application
can be used to configure all Dante network
and audio parameters. Front-panel LED
indicators, an LCD display, and five push-
button switches are provided to view and
revise selected operating parameters. The
Model 48D is compatible with the Dante
Domain Manager™ (DDM) software appli-
cation and is complaint with AES67 digital
audio signals.
Figure 1. Model 48D “throw-down” front view
Figure 2. Model 48D back view
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Dante Audio-over-Ethernet
Audio data is sent to and received from
the Model 48D using the Dante audio-over-
Ethernet media networking technology. Two
separate network interfaces allow com-
pletely independent configurations. Audio
signals with a sample rate of 44.1, 48, 88.2,
and 96 kHz and a bit depth of up to 24
are supported. Up to four audio channels
in each direction can pass (be “bridged”)
between the Model 48D’s two network in-
terfaces. (Four channels at 48 kHz sample
rate and two channels at a sample rate of
96 kHz.)
Sample rate converter (SRC) integrated
circuits ensure that audio that enters on
one network interface exits the correspond-
ing network interface with correctly-aligned
digital audio information. Each interface
has four Dante input (receiver) and output
(transmitter) channels. They are associ-
ated on a one-to-one basis with the chan-
nels both interfaces. For example, input 1
on Network A is associated with output 1
on Network B. Routing (subscribing) of the
Dante input and output channels to other
devices can be performed using the Dante
Controller software applications.
Applications
The Model 48D’s primary application is to
interconnect audio channels associated
with two independent networks that are
supporting Dante-compliant equipment. Up
to four channels of audio in each direction
can be “bridged” between each network.
Each Dante network can have its own
master clock, bit depth, and sample rate.
Circuitry within the Model 48D ensures
that the audio signals can pass between
the networks with minimal degradation to
performance. The Model 48D’s two network
ports are fully metallically isolated and
share very little network data. This helps
to ensure that the risk of security issues is
minimized. Only uncompressed PCM digi-
tal audio signals pass, by way of sample-
rate-converter (SRC) integrated circuits,
between the two network interfaces.
The most basic application for the Model
48D is to allow up to four audio channels
on two independent Dante networks to be
interconnected — there’s really no simpler
means of interconnecting Dante audio
channels from between two separate net-
works. With standard connectors and PoE
power, setup can be completed in just a
few minutes. This makes Model 48D units
effective in both fixed and portable applica-
tions. Ideal uses would include stadiums,
concert venues, media production studios,
and education facilities where “guests”
frequently need to interconnect their Dante
equipment with “house” resources. One of
the Model 48D’s network connections can
be secured while the other remains “open”
for guest use.
As the number of mobile broadcast facili-
ties that utilize Dante-compliant equipment
increases so does the need to intercon-
nect them with a venue’s resources. But
maintaining isolation between the two
networks can be important for reasons of
both signal-integrity and security. In just
minutes the Model 48D can allow audio
signals in both directions to be traversing
the two networks.
The Model 48D can also find use within
a single Dante network. The unit’s abil-
ity to link Dante audio channels that have
different clocking, bit depth, and sample
rate characteristics can be valuable. For
example, one piece of equipment may only
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Studio Technologies, Inc. Page 7
support a sample rate of 96 kHz, while the
other devices connected to the network
only support 48 kHz. In this situation the
Model 48D would allow two channels
in each direction to interconnect, while
still maintaining the required 96 kHz and
48 kHz sample rates. In this application it’s
interesting to note that both of the Model
48D’s Ethernet ports would be connected
to the same local-area-network (LAN).
The Model 48D supports a maximum of
four audio channels in each direction which
can seem to be a significant limitation. But
this small channel count should prove very
adequate for many applications. For ex-
ample, live-event venues may only need
to interchange a few audio channels with
OTA (over-the-air) or web streaming mo-
bile broadcast facilities. The venue might
send one or two channels of scoreboard,
replay, or stadium announcer audio. While
the mobile facility may only need to return
program or “on-air” feeds to the “house”
audio console.
DDM and AES67
The Model 48D is compliant with the
Dante Domain Manager software applica-
tion. However, there is no requirement 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
interface’s can be configured to support,
or not support, AES67 digital audio sig-
nals. 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 de-
signed 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 main-
taining low-distortion, low-noise, and high
headroom.
Status LEDs and LCD Display
On the front panel the Model 48D provides
four LED indicators, 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 oper-
ating conditions to be monitored, including
firmware version numbers, network param-
eters, 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 inde-
pendent local-area-networks (LANs) using
standard 100 Mb/s twisted-pair Ethernet
signals. The physical connections are made
by way of two Neutrik® etherCON RJ45
receptacles. While compatible with standard
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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 net-
work 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 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. 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 connectors to allow fast and conve-
nient interconnections. Two Ethernet signals
are connected using Neutrik etherCON RJ45
receptacles. Operation will commence im-
mediately if Power-over-Ethernet (PoE) is
available on the Ethernet connection associ-
ated 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 en-
hanced in the future. A USB connector,
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 Mod-
el 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.
Getting Started
In this section signal interconnections will
be made using the connectors located on
the Model 48D’s back panel. Two Ethernet
data connections will be made using either
standard RJ45 patch cables or etherCON
protected RJ45 plugs. The unit can be
powered using an Ethernet connection
that provides Power-over-Ethernet (PoE).
If that is not available a 4-pin XLR connec-
tor allows the connection of an external
source of 12 volts DC.
System Components
Included in the shipping carton are the
Model 48D Dante Bridge and a printed
copy of this guide. If the specific applica-
tion requires a source of 12 volts DC it
must be provided separately. A compatible
power supply, the Studio Technologies’
PS-DC-02, is available as an option.
If one or two Model 48D units are going
to be mounted in a 19-inch equipment rack
then an optional rack-mount installation kit
is required. Specific kits are available for
rack-mounting one or two Model 48D units.
If one or more rack-mount kits were pur-
chased they would typically have shipped
in separate cartons.
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Locating the Model 48D
The location of the Model 48D will primar-
ily depend on being within the 100-meter
(325-foot) twisted pair Ethernet cable limita-
tion. Each of the two Ethernet ports on the
Model 48D would have to be within that
length limit. But that requirement can be
overcome by using fiber-optic interconnects
between the Model 48D-related Ethernet
switches and the other Ethernet switches
in the local-area-networks (LANs).
Protecting the Enclosure
The Model 48D 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 48D
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.
Rack Mounting
For some applications it might be desirable
to mount one or two Model 48D units into
one space (1U) of a 19-inch rack enclosure.
Rack-mount installation kits, purchased
separately, are available from Studio Tech-
nologies. The following sections provide
details on how to use the rack-mount kits.
Refer to Appendices B and C of this guide
for graphical descriptions of how to attach
the rack-mount kits.
Rack-Mounting One Model 48D
Rack-mount installation kit RMBK-11 is
used to allow rack mounting of one Model
48D unit. The kit contains one standard
rack bracket, one long rack bracket, and
four 6-32 thread-pitch Phillips-head ma-
chine screws. Refer to Appendix B for a
visual explanation.
Begin the installation by removing the
four “bump on” protectors from the bot-
tom of the Model 48D’s chassis. They can
be removed using one’s fingers to rotate
them counterclockwise; no tool is required.
It’s probably a good idea to store the four
“bump on” protectors for possible later use.
With assistance from a #2 Phillips-tip
screw driver, use the machine screws to
attach the standard and long rack brackets
to the sides of the Model 48D’s enclosure.
The screws will mate with the threaded
fasteners that can be seen on the sides of
the Model 48D’s enclosure, near the front
of the unit.
Mount the standard rack bracket to the left
side of the Model 48D (when viewed from
the front) if the unit needs to be located on
the left side of the rack enclosure. Then
mount the long rack bracket to the right
side of the Model 48D. Mount the brack-
ets in the opposite orientation should the
Model 48D need to be located on the right
side of the rack enclosure.
Once the “bump on” protectors have been
removed and the standard and long rack
brackets have been installed the Model
48D will be ready to be mounted into the
designated equipment rack. One space
(1U or 1.75 vertical inches) in a standard
19-inch equipment rack is required. Secure
the unit into the equipment rack using two
mounting screws per side.
Rack-Mounting Two Model 48D Units
Rack-mount installation kit RMBK-12
is used to allow one-space (1U) rack
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mounting of two Model 48D units. The
kit contains two standard rack brackets,
two joiner plates, eight 6-32 thread-pitch
Phillips-head machine screws, and two
2-56 thread-pitch Torx T7 thread-forming
machine screws. Refer to Appendix C for
a visual explanation.
Begin installing the kit by removing the four
“bump on” protectors from the bottom of
each chassis. They can be removed using
one’s fingers to rotate them counterclock-
wise; no tool is required. Store the eight
“bump on” protectors for possible later use.
With assistance from a #2 Phillips-tip
screw driver, use two of the 6-32 machine
screws to attach one of the standard rack
brackets to the left side (when viewed from
the front) of one of the Model 48D units.
The screws will mate with the threaded
fasteners that can be seen on the sides of
the Model 48D’s enclosure, near the front
of the unit. Using two more of the 6-32
machine screws, attach one of the joiner
plates to the right side of that same Model
48D unit.
Again using two of the 6-32 machine
screws, attach the second standard rack
bracket to the right side of the second
Model 48D unit. Using the final two 6-32
machine screws, attach the second joiner
plate to the left side of the second Model
48D unit with an orientation of 180 degrees
from the way in which the first plate was
installed.
To complete the assembly, “join” the
units together by sliding each joiner plate
through the other. The grooves in each
joiner plate will carefully align with each
other and form a relatively tight bond. Line
up the two units so that the front panels
form a common plane. With the aid of a
Torx T7 driver, use the two 2-56 machine
screws to secure the two joiner plates
together. The screws should fit snugly into
the small openings formed by the mating
of the two joiner plates.
Once the “bump on” protectors are re-
moved and the assembly created, the two
Model 48D units are ready to be mounted
into the designated equipment rack. One
space (1U or 1.75 vertical inches) in a
standard 19-inch equipment rack is re-
quired. Secure the unit into the equipment
rack using two mounting screws per side.
Ethernet Connections
The Model 48D has two network connec-
tions called Network A and Network B.
These are associated with the two net-
works that are going to “bridged” by the
Model 48D. Each network connection
needs to support 100BASE-TX (100 Mb/s
over twisted-pair) for the Model 48D’s
Dante audio-over-Ethernet connectivity.
10BASE-T connections are not sufficient
for Model 48D operation. 1000BASE-T
(“GigE”) connections are not supported
unless they can automatically “fall back”
to 100BASE-TX operation.
An Ethernet connection that supports
Power-over-Ethernet (PoE) is preferred
for connecting to Network A as it will pro-
vide both data and operating power for the
Model 48D. To support power manage-
ment functionality on an associated PoE
switch (PSE) the Model 48D’s Network A
connection will enumerate itself as a PoE
class 1 (very low power) device. If PoE is
not available on Network A an external
12 volt DC power source can be con-
nected. This will be discussed in a later
subsection of the guide.
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