Studio Technologies M44D Dante to Analog Interface

ITEM #: STCH-M44D MFG #: M44D

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M44D - Overview

The Model 44D Audio Interface provides a simple yet high-performance means of interfacing two channels of analog line-level audio to and from applications that utilize Danter audio-over-Ethernet media networking technology. Two Model 44D units can also provide one-to-one signal paths, two in each direction, over a standard local area network (LAN). In addition, the unit supports transport of status signals or contact closures between Model 44D units and other compatible products. There are two general-purpose inputs (GPI) and two general-purpose output (GPO) on each Model 44D.

A special operating mode allows the Model 44D to serve as a tone generator rather than an audio interface. When configured for the tone generator mode 18 kHz and 20 kHz sine-wave audio signals are available in both the analog and digital domains.

  • Features:

    • Dante audio-over-Ethernet technology
    • Input and output level metering
    • Selectable input and output nominal levels
    • Excellent audio quality
    • GPI/GPO support
    • Tone generator mode for REMI and call light applications
    • PoE and 12 Vdc powering
    • Standard connectors
    • Table-top, portable, or optional rack-mount use
     

  • Specifications:

    • Power Sources:
    • Power-over-Ethernet (PoE): class 1 (very low power, =3.84 watts) per IEEE 802.3af
    • External: 10 to 18 volts DC, 0.3 amp maximum at 12 volts DC

      Network Audio Technology:
    • Type: Dante audio-over-Ethernet
    • AES67-2013 Support: yes
    • Dante Domain Manager (DDM) Support: yes
    • Bit Depth: up to 24
    • Sample Rates: 44.1 and 48 kHz
    • Number of Receiver (Input) Channels: 2
    • Number of Transmitter (Output) Channels: 2
    • Dante Audio Flows: 4; 2 receiver, 2 transmitter

      Network Interface:
    • Type: twisted-pair Ethernet, Power-over-Ethernet (PoE) supported
    • Data Rate: 100 Mb/s (10 Mb/s not supported; 1000 Mb/s "GigE" Ethernet not supported unless falls back
      to 100 Mb/s)

      Line Inputs: 2
    • Type: analog, electronically balanced, capacitor coupled
    • Impedance: 20 k ohms, nominal
    • Nominal Level: +4 dBu, reference -20 dBFS or 0 dBu, reference -18 dBFS, configurable
    • Maximum Level: +24 dBu when configured for +4 dBu nominal, +18 dBu when configured for 0 dBu nominal
    • Dynamic Range: >114 dB, A-weighted
    • Distortion (THDS+N): <0.002% (-95 dB), measured at -1 dBFS, 22 kHz bandwidth
    • Frequency Response: +0.0 dB/-0.5 dB, 20 Hz to 20 kHz; 10 kHz low-pass filters disabled
    • Low-Pass Filters: -3 dB @ 10 kHz, -55 dB @ 20 kHz, configurable on or off in tandem with line output
      filters

      Line Outputs: 2
    • Type: analog, electronically balanced, capacitor coupled, intended to drive balanced or unbalanced
      loads of 2 k ohms or greater.
    • Source Impedance: 200 ohms
    • Nominal Level: +4 dBu, reference -20 dBFS, or0 dBu, reference -18 dBFS, configurable
    • Maximum Level: +24 dBu when configured for +4 dBu nominal, +18 dBu when configured for 0 dBu nominal
    • Dynamic Range: >114 dB, A-weighted
    • Distortion (THDS+N): 0.003% (-90 dB), measured at -1 dBFS, 22 kHz bandwidth
    • Frequency Response: ±0.1 dB, 20 Hz to 20 kHz, 10 kHz low-pass filter disabled
    • Low-Pass Filters: -3 dB @ 10 kHz, -55 dB @ 20 kHz, configurable on or off in tandem with line input
      filters

      Tone Generator:
    • Type: sine-wave
    • Frequency: 18 kHz ±350 mHz; 20 kHz ±350 mHz
    • Analog Output Level: +4 dBu, nominal
    • Analog Output Distortion (THD+N): <0.003%
    • Digital Output Level (Dante transmitter (Output)): -20 dBFS
    • Digital Output Distortion (THD+N): <0.0001%

      Meters: 4
    • Function: displays level of line inputs and line outputs in dBFS
    • Type: 5-segment LED, modified VU ballistics

      GPI: 2
    • Type: logic input, pulled to +3.3 volts DC through 3.3 k (3300 ohm) resistor, pull down to common to
      enable
    • Signaling Method: tones summed into Dante transmitter audio path, 20 kHz nominal at 48 kHz sampling
      rate, 18.375 kHz nominal at 44.1 kHz sampling rate

      GPO: 2
    • Output Type: solid-state relay contact
    • Contact Type: form A (normally open, not shorted), isolated
    • Contact Rating: 400 mA, 60 volts AC/DC, maximum
    • Contact Resistance: 2 ohms, maximum
    • Detection Method: monitors Dante receiver audio path for presence of 20 kHz (±800 Hz) tone at
      48 kHz sampling rate, 18.375 kHz (±800 Hz) tone at 44.1 kHz sampling rate. Tones will pass to
      line outputs unless low-pass filters enabled.
    • GPO Status LEDs: 2

      Auxiliary DC Output:
    • Application: for use with GPO outputs
    • Type: 12 volts DC, nominal, 10-18 volts DC with external power connected, 25 mA maximum

      Connectors:
    • Line Inputs: 3-pin female XLR
    • Line Outputs: 3-pin male XLR
    • Ethernet: Neutrik etherCON RJ45
    • External DC: 4-pin male XLR
    • GPI/GPO/Aux DC: 9-pin female D-subminiature (DE-9F)
    • USB: type A receptacle (located inside Model 44D's enclosure and used only for application firmware
      updates)
     

Required Accessories

M44D - Required Accessories

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