Studio Technologies 44D User Manual
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Studio Technologies 44D User Manual

Audio interface
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Model 44D
Audio Interface
Dante
to and from Analog Audio
®
User Guide
Issue 6, February 2023
This User Guide is applicable for serial numbers
M44D-01151 and later with application firmware 2.2 and later
and Dante firmware 4.6.0 (UltimoX2 4.2.2.3) and later
Also applicable to units with serial numbers
M44D-00151 to 00250; see Appendix A for details
Copyright © 2023 by Studio Technologies, Inc., all rights reserved
studio-tech.com
50032-0223, Issue 6

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Summary of Contents for Studio Technologies 44D

  • Page 1 M44D-01151 and later with application firmware 2.2 and later and Dante firmware 4.6.0 (UltimoX2 4.2.2.3) and later Also applicable to units with serial numbers M44D-00151 to 00250; see Appendix A for details Copyright © 2023 by Studio Technologies, Inc., all rights reserved studio-tech.com 50032-0223, Issue 6...
  • Page 2 This page intentionally left blank.

  • Page 3: Table Of Contents

    Getting Started .............. 10 Configuration ..............14 Operation ..............18 Technical Notes ............. 22 Specifications ..............26 Appendix A: Original vs Updated Model 44D ....28 Appendix B: Interfacing with RTS ® Matrix Intercom Systems ..........31 Appendix C: Interfacing with Riedel Artist™...

  • Page 4: Revision History

    • Clarifies tone generator frequencies versus sample rate. Issue 5, April 2021: • Added Appendices B, C, and D. Details how to interface the Model 44D with matrix intercom systems. Issue 4, June 2020: • Documents deletion of pull-up/pull-down capability.

  • Page 5: Introduction

    Model 44D units ported via the Dante interface. Two digital and other compatible products. There are audio signals arrive into the Model 44D via two general-purpose inputs (GPI) and two the Dante interface and are then converted general-purpose output (GPO) on each to analog.
  • Page 6 Dante Audio-over-Ethernet adoption by a large number of equipment manufacturers. The Model 44D is a gen- Audio data is sent to the Model 44D us- eral-purpose “tool” that helps to expand ing the Dante audio-over-Ethernet media Dante’s capabilities to facilities and equip- networking technology.
  • Page 7 Line Outputs The 20 kHz tone is provided for use in ap- The Model 44D provides two analog line- plications where generation of a party-line level output channels. As with the line call signal is desired. For example, the...
  • Page 8 A closure in helping to confirm correct operation. on a GPI on one Model 44D unit will result During normal operation the meters of- in the closing (shorting) of a solid-state relay fer direct confirmation of the unit’s audio...
  • Page 9 Both the 18 kHz and 20 kHz tones are pre- two GPI, two GPO, and auxiliary DC out- cise in terms of frequency and level accu- put functions. The Model 44D is housed in racy, as well as being very low in harmonic a rugged yet lightweight aluminum enclo- distortion.

  • Page 10: Getting Started

    For permanent or mobile applications it System Components might be desirable to mount one or two Model 44D units into one space (1U) of a Included in the shipping carton are the 19-inch rack enclosure. A range of rack- Model 44D Interface and instructions on...
  • Page 11 RJ45 plug. The Model 44D’s Ethernet er use. Note that on the rack-panel’s graph- interface supports auto MDI/MDI-X and, ics the Model 44D unit that’s on the left is as such, using a crossover or “reversing” designated as A while the unit on the right cable will not be required.
  • Page 12 (+). Purchased as an option, the Two 3-pin female XLR connectors, located PS-DC-02 power supply is available from on the Model 44D’s back panel, are used Studio Technologies. Its AC mains input for interfacing with the source signals. allows connection to a 100-240 volts, Prepare 3-pin male XLR mating connectors 50/60 Hz source and its 12 volt DC, 1.5...
  • Page 13 3. Do not short pins 3 to connections. This connector is located pin 1 on the Model 44D’s line output con- on the Model 44D’s back panel. A GPI is nectors as it will stress the output circuitry.

  • Page 14: Configuration

    Switch SW1 is used to configure the nom- iary DC output has a nominal voltage of inal level of the Model 44D’s two line input 12 and is referenced to system common. channels. When SW1 is in its off (down)
  • Page 15 Switch SW2 is used to configure the nomi- line output signals to be less than typical. nal level of the Model 44D’s two line output Model 44D User Guide Issue 6, February 2023 Studio Technologies, Inc.
  • Page 16 Model 44D by way of the line inputs generates 18 kHz and 20 kHz sine-wave and exits the Model 44D by way of the line tones. Analog output 1 and Dante trans- outputs. When SW3 is in its off (down) mitter (output) channel 1 will have a con- position the low-pass filters are disabled.
  • Page 17 Dante Configuration specific Model 44D. The two Dante receiv- er (input) channels have the default names To integrate the Model 44D into an audio of Ch1 and Ch2. The two Dante transmit- interface application several Dante- ter (output) channels also have the default related parameters can be configured.

  • Page 18: Operation

    Operation Upon Model 44D power up the status LEDs will light in various manners. The PoE, Dan- At this point the Model 44D should have its te, and Ethernet status LEDs, located on Ethernet, line input, line output, and GPI/ the back panel, will light in various ways.
  • Page 19 Dante output data with another Dante device. The SYNC (transmitter) channels is 6 dB different LED will light red when the Model 44D is than expected, either high or low, a user not synchronized with a Dante network. It should confirm that the Model 44D’s input...
  • Page 20 Dante input (receiver) level kHz nominal “call light” or signaling tones of –18 dBFS is present. And the corre- need to pass from the Model 44D’s Dante sponding analog output signal present on receiver inputs to the line outputs.
  • Page 21 Model 45DC or Model 45DR inter- 44D’s configuration. So, for example, if the com interfaces. Since the three units (44D, Model 44D is configured for +4 dBu nom- 45DC, and 45DR) all use 20 kHz tones inal input levels then the associated OM-...

  • Page 22: Technical Notes

    Dante-enabled devices that use the Ultimo Dante implementation, • The Dante transmitter (output) channels such as two Model 44D units. An Ethernet will have names of 18kHz and 20kHz. switch is required to provide the Ethernet • The Dante receiver (input) channels ports to correctly interconnect two Ulti- will have names of Ch1–Inactive and...
  • Page 23 Model 44D’s IP address and Display related network parameters can be set for As part of the Model 44D’s power-up se- a fixed (“static”) configuration. While this is quence the unit’s application firmware a more-involved process than simply letting version number is displayed.
  • Page 24 Model 44D, the name of the zip file itself will (M44D.bin). This process will take include the file’s version number. For exam- only a few seconds. During this time ple, a file named M44Dv1r3MCU.zip would...
  • Page 25 7. Replace the cover and secure it using the previously removed screws and lock washers. 8. Apply power to the Model 44D and “read” the application firmware version number by observing the two meters associated with the line outputs. Ensure that this is the desired version.

  • Page 26: Specifications

    Contact Rating: 400 mA, 60 volts AC/DC, maxi- coupled, intended to drive balanced or unbalanced loads of 2 k ohms or greater. Contact Resistance: 2 ohms, maximum Source Impedance: 200 ohms Issue 6, February 2023 Model 44D User Guide Page 26 Studio Technologies, Inc.
  • Page 27 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) Dimensions – Overall: 8.7 inches wide (22.1 cm) 1.72 inches high (4.4 cm) 8.3 inches deep (21.1 cm)

  • Page 28: Appendix A: Original Vs Updated Model 44D

    Figure 9. Back view of “original” Model 44D unit with serial numbers 00151-00250 (left) and “updated” Model 44D unit with serial numbers 01151-later (right) Issue 6, February 2023...
  • Page 29 Technologies for details regarding obtain- 10-pin header is located refer to Figure 10. ing a pre-fabricated interface cable. Figure 10. Model 44D GPI/GPO/Aux DC Out 10-pin header location (applies to M44D-00151-00250) Model 44D User Guide Issue 6, February 2023 Studio Technologies, Inc.
  • Page 30 GPO 2-A GPI 1 GPI 2 Aux DC Out GPO 1-B GPO 2-B Figure 11. Model 44D GPI/GPO/Aux DC Out 10-pin header and 9-Pin D-sub pinout chart (M44D-00151-00250) Application Firmware Update Procedure The application firmware used for original Model 44D units is compatible with that used in the updated Model 44D units.

  • Page 31: Appendix B: Interfacing With Rts ® Matrix Intercom Systems

    Appendix B Interfacing RTS Matrix Intercom Systems with the Model 44D Audio Interface ® ADAM™ Matrix Intercom System Analog Ports to Model 44D Interface RVON-I/O I/O Connections to Model 44D Interface Model 44D User Guide Issue 6, February 2023 Studio Technologies, Inc.

  • Page 32: Appendix C: Interfacing With Riedel ® Artist™ Matrix Intercom Systems

    Appendix C Interfacing Riedel Artist™ Matrix Intercom System Analog Ports with the ® Model 44D Audio Interface Issue 6, February 2023 Model 44D User Guide Page 32 Studio Technologies, Inc.

  • Page 33: Appendix D: Interfacing With Clear-Com ® Matrix Intercom Systems

    Appendix D Interfacing Clear-Com Matrix Intercom System Analog Ports with the ® Model 44D Audio Interface Model 44D User Guide Issue 6, February 2023 Studio Technologies, Inc. Page 33...

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