Studio Technologies Model 43D Bedienungsanleitung
Copyright © 2015 by Studio Technologies, Inc., all rights reserved
www.studio-tech.com
50028-0915, Issue 1
User Guide
Issue 1, September 2015
This User Guide is applicable for serial numbers
M43D-00151 and later with application firmware 1.1 and later
and Dante firmware 1.2 (Ultimo 2.2.2.5) and later
Model 43D
Dante™ to IFB Interface
This page intentionally left blank.
Model 43D User Guide Issue 1, September 2015
Studio Technologies, Inc. Page 3
Table of Contents
Revision History ............................................................ 4
Introduction ................................................................... 5
Getting Started .............................................................. 8
Configuration ................................................................ 12
Operation ...................................................................... 13
Technical Notes ............................................................. 16
Specifications ................................................................ 20
Issue 1, September 2015 Model 43D User Guide
Page 4 Studio Technologies, Inc.
Revision History
Issue 1, September 2015:
1. Initial release.
Model 43D User Guide Issue 1, September 2015
Studio Technologies, Inc. Page 5
Introduction
The Model 43D IFB Interface provides
broadcast-standard powered and non-
powered analog audio IFB outputs from
audio signals that are being transported
using the Dante™ Audio-over-Ethernet
media networking technology. IFB, also
known as “interruptible foldback” or tal-
ent cueing, is a method commonly used
for on-air talent and related personnel
to receive one-way (listen-only) audio
signals associated with live-event broad-
casts. Especially important in sports and
entertainment events, IFB plays a crucial
role in virtually all broadcast applications
that require people to stay “in the know.”
Dante has found wide acceptance as an
audio “backbone” due to its ease of use,
high performance, strong interoperability,
and wide adoption by a large number of
equipment manufacturers. The Model 43D
is a specialized “tool” that helps to extend
Dante’s capabilities into the important but
specialized world of broadcast and pro-
duction IFB.
Dante Audio-over-Ethernet technology is
used to transport the four audio channels
that are associated with two, 2-channel
IFB outputs from their source to the Model
43D. Each of the Model 43D’s two powered
IFB outputs supply operating power and
two audio channels to groups of listen-only
user devices. Two line-level analog outputs
are also provided for general-purpose use.
The Model 43D is compatible with the latest
broadcast and audio equipment that uses
Dante technology. An Ethernet connection
is all that’s required to make the Model 43D
part of a sophisticated, networked audio
system.
A Model 43D utilizes four digital audio
input channels typically provided by Dante-
enabled devices such as matrix intercom
systems, DSP processors, broadcast rout-
ers, and audio consoles. The powered IFB
outputs allow direct connection with listen-
only user beltpacks such as the popular
Model 32A from Studio Technologies.
The line-level IFB outputs are provided for
connection with a variety of devices that
Figure 1. Model 43D standard “throw-down” front view
Figure 2. Model 43D back view
Issue 1, September 2015 Model 43D User Guide
Page 6 Studio Technologies, Inc.
use analog interfacing. Careful attention
to circuit design and component selec-
tion ensures that excellent audio quality
is maintained. Audio level meters provide
confirmation of system performance dur-
ing setup and operation. The Model 43D
can be powered by Power-over-Ethernet
(PoE) or an external source of 12 volts DC.
Standard connectors are used for the
powered IFB outputs, line-level IFB out-
puts, Ethernet, and DC power intercon-
nections. The Model 43D’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-
mount front panels, one or two Model 43D
units can be mounted in a single space
(1U) of a standard 19-inch rack enclosure.
Dante Audio-over-Ethernet
Audio data is sent to the Model 43D us-
ing the Dante Audio-over-Ethernet media
networking technology. Audio signals with
a sample rate of 44.1 or 48 kHz and a bit
depth of up to 24 are supported. Four
transmitter (output) channels on associ-
ated Dante-enabled source devices can
be assigned to the Model 43D’s receiver
(input) channels using the Dante Control-
ler application. This makes it simple to
select the way in which a Model 43D fits
into a specific application.
Applications
The Model 43D was designed to add
broadcast-standard 2-channel IFB func-
tionality to Dante-enabled broadcast
and related applications. Combining the
networked audio capability of Dante with
traditional analog powered (“wet”) and
non-powered (“dry” or line-level) IFB
outputs allows traditional and effective
cueing methods to be maintained.
The Model 43D can be used in applica-
tions where IFB (talent cueing) channels
are created in matrix intercom systems
and become part of a Dante Audio-over-
Ethernet network deployment. Output
ports on matrix intercom systems that
directly support Dante, such as the RTS
ADAM® with OMNEO®, can be routed
to the Model 43D’s Dante receiver (input)
channels. The Model 43D’s circuitry will
then convert these signals into standard
analog IFB audio outputs. In this way add-
ing IFB support for RTS + OMNEO infra-
structures is a simple task. Other matrix
intercom and broadcast router systems
also directly support Dante. The Model
43D can also be used with matrix inter-
com systems that don’t support Dante. An
external analog-to-Dante interface can be
used to convert analog intercom output
ports to Dante channels. For example, the
Studio Technologies Model 44D Audio
Interface does an excellent job of con-
verting line-level analog signals to Dante
digital audio channels. Once in the digital
domain, these Dante channels can be in-
terconnected with the Model 43D’s audio
input channels.
In applications where on-air talent uses
headsets with two earphones (stereo or
“dual muff”) two unique audio channels
are typically part of the provided IFB signal
source. Generally one channel is config-
ured in a matrix intercom system as “inter-
rupt” while the other channel is configured
as “program.” (In U.S. applications the
former signal is assigned to the left ear
and the latter signal to the right ear.) An
alternate term often used for the “inter-
rupt” channel is “program-with-interrupt.”
Model 43D User Guide Issue 1, September 2015
Studio Technologies, Inc. Page 7
This may be more descriptive as the
function is actually a program source that
gets interrupted with talkback audio. The
“program” channel is typically a continu-
ous source of program audio. An alternate
term is “program-only.” The source of
interrupt audio is typically a producer or
director who provides real-time informa-
tion to the on-air talent.
In other applications, talent will use a
single-ear headset, “ear bud,” or in-ear
monitor, keeping the other ear accessible
to ambient audio. This is frequently done
in electronic news gathering (ENG) or
sports-broadcast applications where live
interviews take place. An audio source
with program-with-interrupt is provided;
no program audio source is utilized.
Powered IFB Outputs
The Model 43D provides two, 2-channel
powered analog IFB outputs that are
designed to directly support connection
of listen-only user devices such as the
Models 32A, 33A, or 34 from Studio
Technologies. Each powered IFB output
provides both DC and two channels of
unbalanced audio. Two 3-pin male XLR
connectors, located on the Model 43D’s
back panel, are used to interface with
the listen-only user devices. Following
broadcast-industry conventions, pin 1
is the common connection, pin 2 has
28 volts DC with channel 1 audio super-
imposed on it, and pin 3 has channel 2
audio. Each power source supplies a
maximum current of 120 milliamperes.
The power supply outputs are monitored
for over-current and short-circuit condi-
tions. Under firmware (embedded soft-
ware) control the outputs will automatically
cycle off and on to help prevent damage
to the circuitry and connected equipment.
Line-Level IFB Outputs
In addition to the two, 2-channel powered
IFB outputs, the Model 43D also provides
two channels of analog line-level IFB. The
audio sources for the line-level outputs is
the same as used for channels 1 and 2 of
powered IFB output 2. The line-level out-
puts are intended to allow interconnection
with externally-powered listen-only user
devices, inputs on wireless IFB systems,
or analog inputs on consoles or related
audio devices. The line-level IFB outputs
have a nominal level of –10 dBu and are
transformer- and capacitor-coupled, help-
ing to ensure successful interconnection
with virtually any line-level analog input.
Pro Audio Quality
The Model 43D’s audio circuitry was
designed in the spirit of professional
audio equipment rather than that found
in typical IFB or talent cueing gear. High-
performance components are used
throughout, providing low-distortion,
low-noise, and high headroom. The Model
43D’s powered IFB output sources offer a
unique level of performance; their ability
to deliver power while maintaining audio
quality is simply excellent.
Audio Meters and Status
LEDs
The Model 43D provides four 5-segment
LED meters. The meters, located on the
front panel, display the level of the audio
signals associated with the two, 2-channel
IFB outputs. At the time of installation and
setup the meters are invaluable in help-
ing to confirm correct operation. During
normal operation the meters offer direct
confirmation of the unit’s audio signal
levels, helping to ensure that optimal
Issue 1, September 2015 Model 43D User Guide
Page 8 Studio Technologies, Inc.
audio quality is maintained. Additional LED
indicators are provided on the front panel,
offering status indications of the incoming
power and two IFB power sources.
Ethernet Data, PoE, and DC
Power Source
The Model 43D 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 43D’s operating power
can be provided by way of the Ethernet
interface using the Power-over-Ethernet
(PoE) standard. This allows fast and
efficient interconnection with the associ-
ated data network. To support PoE power
management, the Model 43D’s PoE inter-
face reports to the power sourcing equip-
ment (PSE) that it is a class 3 (mid 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 43D uses standard connectors
to allow fast and convenient interconnec-
tions. 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. Powered IFB
and line-line IFB outputs are made using
3-pin male XLR connectors. The Model
43D is housed in a rugged yet lightweight
aluminum enclosure that is designed to be
“field tough.” It can be used as a stand-
alone 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 43D was designed so that
its capabilities can be enhanced in the
future. A USB connector, located on the
Model 43D’s back panel, allows the ap-
plication firmware (embedded software)
to be updated using a USB flash drive. To
implement the Dante interface the Model
43D uses Audinate’s Ultimo™ integrated
circuit. The firmware in this integrated
circuit can be updated via the unit’s Ether-
net connection, helping to ensure that its
capabilities remain up to date.
Getting Started
In this section signal interconnections
will be made using the connectors located
on the back panel of the Model 43D. Con-
nections to the two powered IFB and two
line-level IFB outputs can be made using
four 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 43D IFB Interface and a printed
copy of this guide. If a rack-mount front
Model 43D User Guide Issue 1, September 2015
Studio Technologies, Inc. Page 9
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 requires an external
source of 12 volts DC it needs to be pro-
vided separately. An applicable power sup-
ply, the Studio Technologies PS-DC-02, is
available as an option.
Locating the Model 43D
The location of the Model 43D may
primarily depend on the length of cable
needed to link the unit with the associated
powered IFB devices. This type of circuit
carries unbalanced audio which can be
susceptible to interference and crosstalk
issues. And since powered IFB circuits
also carry DC power a voltage drop due to
the resistance in the interconnecting cable
can become an issue. In general, minimiz-
ing the length of the cables used with the
powered IFB outputs will help ensure more
reliable and consistent powered IFB device
performance. Of equal importance is the
100-meter (325-foot) twisted pair Ethernet
cable limitation. But that can be overcome
by using a fiber-optic interconnect between
the related Ethernet switch and the other
switches in the Ethernet network.
Protecting the Enclosure
The Model 43D 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 43D
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 the Model 43D
For permanent or mobile applications it
might be desirable to mount one or two
Model 43D units into one space (1U) of a
19-inch rack enclosure. A number of rack-
mount front panels, purchased separately,
are available from Studio Technologies.
The following provides details on how to
install Model 43D units to these panels.
To attach a Model 43D unit to the single-
unit rack-mount panel, begin the process
by using a 5/64-inch hex wrench to re-
move the four 6-32 thread button-head
cap screws that hold the standard front
panel to the chassis. Note that the screws
might be quite tightly affixed. Ensure that
a good-quality hex wrench is used and
press and hold it firmly into the screw
heads while turning counterclockwise.
Unless this recommendation is followed
the wrench could “cam out” and the head
could be “stripped.”
Using the screws that were just removed,
attach the rack-adapter front panel to the
Model 43D’s chassis. To prevent dam-
age care is required when aligning the
front panel with the 24 LEDs and auto null
pushbutton switch that protrude through
both the Model 43D’s chassis and front
panel. Tighten the four screws only after
a careful inspection ensures that the
switch and all 24 of the LEDs protrude
through the front panel without interfer-
ence. To allow vertical clearance in the
associated rack, remove the four “bump
on” protectors from the bottom of the
chassis. They are removed by using the
fingers to rotate them counterclockwise;
no tool is required. Carefully protect and
store the standard front panel, along with
the “bump on” protectors, for possible
later use.
Issue 1, September 2015 Model 43D User Guide
Page 10 Studio Technologies, Inc.
Mounting a Model 43D to a dual-unit rack-
mount panel follows the same procedure
but will apply to two units. Store both of
the removed standard front panels and the
eight “bump on” protectors for possible
later use. Note that on the rack-panel’s
graphics the unit on the left is designated
as A while the unit on the right is desig-
nated as B. This is provided so that each
can be easily identified during installation,
troubleshooting, and operation.
Once the desired one or two Model 43D
units have been installed in a rack-mount
front panel, the assembly can 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 front panel into
the equipment rack using two mounting
screws per side.
Ethernet Connection
An Ethernet connection that supports
100BASE-TX (100 Mb/s over twisted-pair)
is required for the Model 43D’s Dante
Audio-over-Ethernet connectivity. A
10BASE-T connection is not sufficient
for Model 43D operation. A 1000BASE-
T (“GigE”) connection is not supported
unless it can automatically “fall back” to
100BASE-TX operation. An Ethernet con-
nection that supports Power-over-Ethernet
(PoE) is preferred as it will provide operat-
ing power for the Model 43D. To support
power management functionality on an
associated PoE switch (PSE) the Model
43D will enumerate itself as a PoE class 3
(mid power) device. If PoE is not available
an external 12 volt DC power source can
be connected. This will be discussed later
in this section of the guide.
The 100BASE-TX Ethernet connection
is made by way of a Neutrik etherCON
protected RJ45 connector that is located
on the back panel of the Model 43D. This
allows connection by way of a cable-
mounted etherCON plug or a standard
RJ45 plug. The Model 43D’s Ethernet
interface supports auto MDI/MDI-X so that
using a crossover or “reversing” cable will
not be required.
External 12 Volt DC Input
An external source of 12 volts DC can be
connected to the Model 43D by way of a
4-pin male XLR connector which is located
on the back panel. While the requirement
for the external source is to be nominally
12 volts, correct operation will take place
over a 10 to 18 volt range. The Model
43D requires 1.0 amperes maximum at
12 volts DC for correct operation. The DC
source should be terminated to a 4-pin
female XLR connector with pin 1 negative
(–) and pin 4 positive (+). Purchased as
an option, the PS-DC-02 power supply is
available from Studio Technologies. Its AC
mains input allows connection to 100-240
volts, 50/60 Hz and its 12 volt DC, 1.5
amperes maximum output is terminated
on a 4-pin female connector.
As previously discussed in this guide, an
Ethernet connection that provides Power-
over-Ethernet (PoE) can serve as the
Model 43D’s power source. Alternately,
an external 12 volt DC source can be con-
nected. For redundancy, both PoE and an
external 12 volt DC source can be con-
nected at the same time. If both PoE and
an external 12 volt DC source are connect-
ed, power will be drawn only from the PoE
supply. If the PoE source becomes inoper-
ative the 12 volt DC source will provide the
Inhaltsverzeichnis
Andere Studio Technologies Stereoanlage Handbücher
