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Studio Technologies 45DC User Manual
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Studio Technologies 45DC User Manual

Dante to dual party-line intercom interface
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Model 45DC
Dante™ to Dual Party-Line

Intercom Interface

User Guide
Issue 1, January 2015
This User Guide is applicable for serial numbers
M45DC-00151 and later with application firmware 2.2 and later
Copyright © 2015 by Studio Technologies, Inc., all rights reserved
www.studio-tech.com
50017-0115, Issue 1

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Summary of Contents for Studio Technologies 45DC

  • Page 1: Intercom Interface

    Dante™ to Dual Party-Line Intercom Interface User Guide Issue 1, January 2015 This User Guide is applicable for serial numbers M45DC-00151 and later with application firmware 2.2 and later Copyright © 2015 by Studio Technologies, Inc., all rights reserved www.studio-tech.com 50017-0115, Issue 1...
  • Page 2 This page intentionally left blank.

  • Page 3: Table Of Contents

    Table of Contents Introduction ..............5 Installation ..............9 Configuration ..............12 Operation ..............14 Technical Notes ............. 19 Specifications ..............23 Model 45DC User Guide Issue 1, January 2015 Studio Technologies, Inc. Page 3...
  • Page 4 This page intentionally left blank. Issue 1, January 2015 Model 45DC User Guide Page 4 Studio Technologies, Inc.

  • Page 5: Introduction

    An Ethernet connection is all that’s ty-line (PL) intercom technology. The unit required to make the Model 45DC part of a provides two independent single-channel sophisticated, networked audio system. interfaces that each support one party-line A Model 45DC can interconnect with de- audio channel.
  • Page 6 Audio level meters provide confirmation two Model 45DC Interfaces. At each end of system performance during setup and a Model 45DC is connected to one or two operation. Support for transporting call party-line circuits as well as the Dante light signals between Model 45DC units is network.
  • Page 7 This makes selecting the way audio equipment rather than that found in which a Model 45DC fits into a specific in typical party-line intercom gear. High-per- application a simple matter. formance components are used through-...
  • Page 8 Dante interface, transport the tone over the Dante audio and PoE power source. path. A Model 45DC unit at the “far end” will detect the tone and re-generate the call Simple Installation signal as a DC voltage on the audio path.

  • Page 9: Installation

    Future Capabilities and Locating the Model 45DC Firmware Updating The location of the Model 45DC will de- The Model 45DC was designed so that its pend on the length of the cable runs capabilities can be enhanced in the future.
  • Page 10 To attach a Model 45DC unit to the single- Once the desired one or two Model 45DC unit rack-mount panel, begin the process units have been installed in a rack-mount...
  • Page 11 12 volts, correct operation will take place on pin 1, 22 to 30 volts DC is on pin 2, over a 10 to 18 volt range. The Model 45DC and audio is on pin 3. An impedance- requires 1.0 amperes maximum for cor- generating network provides a 200 ohm rect operation.

  • Page 12: Configuration

    A better means to support these 2-channel circuits and devices is to use the Studio Technologies Model 45DR Interface. This unit, the “cousin” of the Model 45DC, is optimized for 2-channel party-line inter- com applications. Rather than providing two single-channel interfaces the Model 45DR provides one 2-channel interface.
  • Page 13 The audio input (receiver) and output (transmitter) channels associated with the Model 45DC units will typically be used in Model 45DC’s Dante interface must be either of two configurations: “point-to-point” assigned to desired sources and destina- or in association with other Dante-enabled tions.

  • Page 14: Operation

    Dante device. The SYNC of front-panel level meter LEDs will mo- LED will light red when the Model 45DC is mentarily display the version number of the not synchronized with a Dante network. It unit’s application firmware.
  • Page 15 Dante interface. offers an identify command that can be This is due to Studio Technologies select- used to help locate a specific Model 45DC. ing –20 dBFS as the reference (nominal) When identify is selected for a specific level for Dante.)
  • Page 16 This termina- modes. One mode is used when a Model tion, 200 ohms nominally, is almost always 45DC channel is required to create a par- made at the power supply source. But it’s ty-line circuit, providing 28 volts DC and possible that another device, such as a a 200 ohm termination impedance.
  • Page 17 flashing the active LED as a warning. According to this figure up to three of these After a 5-second “cool-down” interval the units can be connected to a Model 45DC. A output returns to the same condition as newer version, the RS-701 has a quiescent upon initial power up.
  • Page 18 If local power is being provided to the Normally the nulling processes are per- party-line interface by the Model 45DC it formed at the time of initial Model 45DC will momentarily turn off and then turn on configuration but there’s no reason why ei- again.

  • Page 19: Technical Notes

    As previously discussed, if the Model 45DC is needed to indicate that the call function is supplying local intercom power the mi- is active. The Model 45DC can also gener- crophones will automatically be muted. But ate a call signal by applying a DC voltage to for applications that connect to an existing audio path.
  • Page 20 20 kHz signal. The Model 45DC provides two independent When the Model 45DC detects DC on the single-channel party-line intercom interfaces. audio path (pin 3 of the back-panel inter- These interfaces can be connected to two...
  • Page 21 firmware (embedded software) file will adhere to the naming convention that runs the Model 45DC’s microcontroller required by the Model 45DC, the name of (MCU) integrated circuit will be released to the zip file itself will include the file’s ver- add features or correct issues.
  • Page 22 To install the application firmware file 7. At this time the Model 45DC is func- follow these steps: tioning with the newly-loaded applica- tion firmware and the USB flash drive 1. Remove power from the Model 45DC. can be removed. But to be conser- This will entail removing the Ethernet vative, remove power first and then...

  • Page 23: Specifications

    Impedance, pin 3 – Local Power Not Enabled: Specifications and information contained in this >10 k ohms User Guide subject to change without notice. Impedance, pin 3 – Local Power Enabled: 200 ohms Model 45DC User Guide Issue 1, January 2015 Studio Technologies, Inc. Page 23...