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

Dante to and from analog audio
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Model 44D
Audio Interface
Dante
to and from Analog Audio
®
User Guide
Issue 2, November 2017
This User Guide is applicable for serial numbers
M44D-01151 and later with application firmware 2.1 and later
and Dante firmware 2.0.0 (Ultimo 3.10.1.12) and later
Also applicable to units with serial numbers
M44D-00151 to 00250; see Appendix A for details
Copyright © 2017 by Studio Technologies, Inc., all rights reserved
www.studio-tech.com
50032-1117, Issue 2

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Summary of Contents for Studio Technologies 44D

  • Page 1 M44D-01151 and later with application firmware 2.1 and later and Dante firmware 2.0.0 (Ultimo 3.10.1.12) and later Also applicable to units with serial numbers M44D-00151 to 00250; see Appendix A for details Copyright © 2017 by Studio Technologies, Inc., all rights reserved www.studio-tech.com 50032-1117, Issue 2...
  • Page 2 This page intentionally left blank.

  • Page 3: Table Of Contents

    Introduction ..............5 Getting Started .............. 9 Configuration ..............14 Operation ..............17 Technical Notes ............. 21 Specifications ..............25 Appendix A: Original vs Updated Model 44D ....27 Model 44D User Guide Issue 2, November 2017 Studio Technologies, Inc. Page 3...

  • Page 4: Revision History

    Revision History Issue 2, November 2017: 1. Documents addition of operating mode configuration (audio interface and tone generator). Issue 1, September 2016: 1. Initial release. Issue 2, November 2017 Model 44D User Guide Page 4 Studio Technologies, Inc.

  • Page 5: Introduction

    Two Model 44D units the Dante interface. Two digital audio can also provide one-to-one signal paths, signals arrive into the Model 44D via the two in each direction, over a standard lo- Dante interface and are then converted to cal area network (LAN).
  • Page 6 Dante Audio-over-Ethernet general-purpose “tool” that helps to ex- pand Dante’s capabilities to facilities and Audio data is sent to the Model 44D us- equipment that primarily supports signals ing the Dante audio-over-Ethernet media in the analog domain. networking technology. Audio signals with a sample rate of 44.1 or 48 kHz and...
  • Page 7 –20 dBFS. In the 0 dBu such as matrix intercom systems or rout- configuration the line inputs are optimized ers. A closure on a GPI on one Model 44D for EBU applications where the nominal unit will result in the closing (shorting) of digital signal level is –18 dBFS.
  • Page 8 Power Source offering status indications of the incoming power and general purpose output (GPO) The Model 44D connects to a data network functions. using a standard 100 Mb/s twisted-pair Ethernet interface. The physical intercon- Tone Generator Mode nection is made by way of a Neutrik®...

  • Page 9: Getting Started

    9-pin GPO, and auxiliary DC output functions. female D-subminiature (DE-9F) connector. The Model 44D is housed in a rugged yet lightweight aluminum enclosure that is de- System Components signed to be “field tough.” It can be used...
  • Page 10 Model 44D unit that’s on the nologies. The following provides details left is designated as A while the unit on on how to install Model 44D units to these the right is designated as B. This is pro- panels.
  • Page 11 (Of course, normal operation tected RJ45 connector that is located on will cease if both PoE and data transport the back panel of the Model 44D. This al- fails on the Ethernet connection.) lows connection by way of a cable-mount-...
  • Page 12 Model 44D’s back panel, are Two 3-pin female XLR connectors, located provided for interfacing the line outputs on the Model 44D’s back panel, are used with associated equipment. Prepare for interfacing with the source signals. 3-pin female XLR mating connectors...
  • Page 13 This connector is located on Function the Model 44D’s back panel. A GPI is only active when its corresponding pin is con- GPO 1-A nected to system common. GPI 1 is acces- GPO 2-A sible on pin 3 and GPI 2 on pin 4. System GPI 1 common is available on pins 8 and 9.

  • Page 14: Configuration

    And in an EBU Switch SW1 is used to configure the nomi- application setting SW1 to its off (down) nal level of the Model 44D’s two line input position would provide a 6 dB decrease channels. When SW1 is in its off (down) in input sensitivity.
  • Page 15 10 kHz that enters the Model will result in an analog signal at the cor- 44D by way of the line inputs and exits the responding line output channel having a Model 44D by way of the line outputs.
  • Page 16 (Dante receiver Model 44D’s operating mode. When SW4 channels on associated devices). This will is in its off (down) position the Model 44D typically be done with the Dante Controller functions as an audio interface. This would...

  • Page 17: Operation

    Initial Operation interface operation will not take place. The unit’s internal processor will generate The Model 44D will begin its initial func- two sine-wave audio signals (tones). The tioning a few seconds after its power two Dante transmitter (output) channels source is connected.
  • Page 18 Dante output data with another Dante device. The SYNC (transmitter) channels is 6 dB different than LED will light red when the Model 44D is expected, either high or low, a user should not synchronized with a Dante network. It confirm that the Model 44D’s input configu-...
  • Page 19 filter function has been disabled. This will nominal “call light” or signaling tones also apply if 20 kHz nominal “call light” need to pass through the Model 44D’s or signaling tones need to pass from the line input to the Dante output (transmitter) Model 44D’s Dante receiver inputs to the...
  • Page 20 An audio signal This should lead to the optimal perfor- that causes the yellow LED to light doesn’t mance of the Model 44D and the associ- necessarily indicate an excessive level ated intercom system. condition, but it does provide a warning...

  • Page 21: Technical Notes

    GPO signals associated with intercom • The two analog line input channels on or broadcast routers with Studio Technolo- the Model 44D’s back panel will not be gies Model 45DC or Model 45DR intercom active. interfaces. Since the three units (44D, •...
  • Page 22 Performance that use the Ultimo Dante implementation, For best Dante audio-over-Ethernet perfor- such as two Model 44D units. An Ethernet mance a network that supports VoIP QoS switch is required to provide the Ethernet capability is recommended. This can typi-...
  • Page 23 .zip archive file. While the firmware file  1 inside of the zip file will adhere to the nam- ing convention required by the Model 44D, the name of the zip file itself will include the file’s version number. For example, a file named M44Dv1r3MCU.zip would...
  • Page 24 file was 12 volt DC source. not found and then normal operation us- 5. The Model 44D will run a “boot loader” ing the unit’s existing application firmware program that will immediately load will begin.

  • Page 25: Specifications

    20 kHz nominal at 48 kHz 20 kHz, configurable on or off in tandem with sampling rate, 18.375 kHz nominal at 44.1 kHz line output filters sampling rate Model 44D User Guide Issue 2, November 2017 Studio Technologies, Inc. Page 25...
  • Page 26 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 27: 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) Model 44D User Guide Issue 2, November 2017 Studio Technologies, Inc.
  • Page 28 10-pin header is located refer to Figure 9. pre-fabricated interface cable. Figure 10. Model 44D GPI/GPO/Aux DC Out 10-pin header location (applies to M44D-00151-00250) Issue 2, November 2017 Model 44D User Guide Page 28...
  • Page 29 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.