Studio Technologies Model-43D IFB Interface


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MODEL-43D - 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 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 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 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 routers, 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 use analog interfacing. Careful attention to circuit design and component selection ensures that excellent audio quality is maintained. Audio level meters provide confirmation of system performance during 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 interconnections. 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.

  • 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
  • Specifications:

    • Power Sources:
    • Power-over-Ethernet (PoE): class 3 (mid power, =12.95 watts) per IEEE 802.3af
    • External: 10 to 18 volts DC, 1.0 amp maximum at 12 volts DC

      Network Audio Technology:
    • Type: Dante audio-over-Ethernet
    • Dante Domain Manager (DDM) Support: yes
    • Bit Depth: up to 24
    • Sample Rates: 44.1, 48 kHz
    • Number of Receiver (Input) Channels: 4
    • Dante Audio Flows: 2 receiver

      Network Interface:
    • Type: twisted-pair Ethernet, Power-over-Ethernet (PoE) supported
    • Data Rate: 100 Mb/s (10 Mb/s Ethernet not supported)

      Powered IFB Outputs: 2
    • Type: 2-channel analog powered IFB, unbalanced (pin 1 common; pin 2 DC with channel 1 audio; pin 3
      channel 2 audio)
    • Compatibility: 2-channel listen-only IFB user devices such as those offered by Studio Technologies
    • Power Source: 28 volts DC, 120 mA maximum, nominal
    • Analog Audio Level: -10 dBu, nominal, +4 dBu maximum, pins 2 and 3
    • Frequency Response: ±1 dB, 20 Hz-20 kHz
    • Distortion (THD+N): <0.02%, measured at 1 kHz, pins 2 and 3
    • Signal-to-Noise Ratio: >85 dB, A-weighted, measured at 1 kHz, pins 2 and 3

      Line-Level IFB Outputs: 2
    • Type: transformer-coupled, capacitor isolated
    • Nominal Level: -10 dBu
    • Maximum Level: +10 dBu into 2 k ohms
    • Frequency Response: -1 dB @ 20 Hz, -1.3 dB @ 20 kHz
    • Distortion: <0.04%, measured at 1 kHz
    • Signal-to-Noise Ratio: >87 dB, A-weighted, measured at 1 kHz

      Meters: 4
    • Function: displays level of IFB output audio channels
    • Type: 5-segment LED, modified VU ballistics

    • Powered and Line-Level IFB Outputs: 3-pin male XLR
    • Ethernet: Neutrik etherCON RJ45
    • External DC: 4-pin male XLR
    • USB: type A receptacle

MODEL-43D - Required Accessories

    California Residents:
    Cancer and Reproductive Harm -