Datasheet

50029-0915, Issue 1
Key Features:
• Dante™ Audio-over-Ethernet technology
• Powered 2-channel IFB outputs
• Line-level IFB outputs
• Excellent audio quality
• PoE and 12 Vdc powering
• Table-top, portable, or optional rack-mount use
Overview
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 talent 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 broadcasts. 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 equip
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ment manufacturers. The Model 43D is a specialized “tool”
that helps to extend Dante’s capabilities into the important
but specialized world of broadcast and production 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 operat
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ing 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 routers, and audio con
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soles. 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 use analog interfacing. Careful at
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tention to circuit design and component selection ensures
that excellent audio quality is maintained. Audio level
meters provide confirmation of system performance dur
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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 outputs, Ethernet, and DC power interconnec
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tions. 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 using 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
associated Dante-enabled source devices can be assigned to
the Model 43D’s receiver (input) channels using the Dante
Controller 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 functionality to Dante-enabled broadcast and
related applications. Combining the networked audio capa
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bility 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 applications where IFB (talent
cueing) channels are created in matrix intercom systems and
become part of a Dante Audio-over-Ethernet network deploy
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ment. Output ports on matrix intercom systems that directly