Model 370A Intercom Beltpack User Guide Issue 2, August 2019 This User Guide is applicable for serial numbers M370A-02501 and later with application firmware 1.2 and later Copyright © 2019 by Studio Technologies, Inc., all rights reserved www.studio-tech.
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MODEL 370A INTERCOM BELTPACK Table of Contents Revision History ............................................................ 4 Introduction ................................................................... 5 Getting Started .............................................................. 8 Operation ...................................................................... 13 Technical Notes ............................................................. 17 Specifications .........................................
MODEL 370A INTERCOM BELTPACK Revision History Issue 2, August 2019: 1. Documents revision to STcontroller (version 2.02.00 and later) which separates microphone power and microphone gain configuration. Issue 1, June 2018: 1. Initial release. Issue 2, August 2019 Page 4 Model 370A User Guide Studio Technologies, Inc.
MODEL 370A INTERCOM BELTPACK Introduction The Model 370A Intercom Beltpack begins with the features offered by traditional 2channel party-line intercom user devices and adds a range of new capabilities, along with the advanced performance and flexibility that Dante® audio-over-Ethernet provides.
MODEL 370A INTERCOM BELTPACK Dante Audio-over-Ethernet Audio data is sent to and received from the Model 370A using the Dante audio-overEthernet media networking technology. As a Dante-compliant device, the Model 370A’s two audio output (Dante transmitter) and two audio input (Dante receiver) channels can be interconnected (routed) with other devices using the Dante Controller software application.
MODEL 370A INTERCOM BELTPACK Configuration Flexibility Ethernet Data and PoE The microphone input can be selected for compatibility with dynamic or elected (DC-powered) microphones. The gain of the microphone preamplifier can be selected from among four choices. These allow compatibility with the variety of microphones that are part of broadcast and intercom headsets. The Model 370A’s operating power is provided by way of the Ethernet interface using the 802.3af Power-over-Ethernet (PoE) standard.
MODEL 370A INTERCOM BELTPACK Getting Started What’s Included Included in the shipping carton are a Model 370A Intercom Beltpack and a printed copy of this guide. As a device that is Powerover-Ethernet (PoE) powered, no external power source is provided. In most applications an Ethernet switch with the required PoE capability will be utilized. Connections In this section signal interconnections will be made using the two connectors located on the bottom of the Model 370A’s enclosure.
MODEL 370A INTERCOM BELTPACK always be wired to pin 4 and the right headphone channel to pin 5. Configuration choices, discussed later in this guide, can then be used to create the desired monaural output. It’s important not to connect together (short) pins 4 and 5 of the Model 370A’s headset connector as damage to the Model 370A’s output circuitry could result. Monaural (single-earpiece or “single muff”) headsets should be wired such that its headphone is wired only to pin 4; pin 5 should be remain unused.
MODEL 370A INTERCOM BELTPACK The Model 370A has a default Dante device name of ST-M370A- followed by a unique suffix. The suffix identifies the specific Model 370A that is being configured. The suffix’s actual alpha and/or numeric characters relate to the MAC address of the unit’s Ultimo integrated circuit. The two Dante transmitter (Tx) channels have default names of Ch1 and Ch2. The two Dante receiver (Rx) channels have default names of Ch1 and Ch2.
MODEL 370A INTERCOM BELTPACK not require microphone power. The on/off status is displayed by way of a red LED, labeled MIC POWER, that is located adjacent to the headset connector. Note that the Model 370A cannot supply P12 or P48 phantom power that may be required for balanced condenser (capacitor) microphones. This should not pose an issue as this type of microphone is essentially never associated with a headset that would be used for intercom applications.
MODEL 370A INTERCOM BELTPACK Sidetone – Level Choices are Off, Low, Medium Low, Medium, Medium High, and High. The Model 370A includes a sidetone function that allows microphone audio coming from the microphone preamplifier to be sent to the both channels of the headphone output. This serves as a user confirmation that they are actively sending audio to either or both of the talk output channels. Sidetone audio will only be routed to the headphone output when either or both of the talk channels are active.
MODEL 370A INTERCOM BELTPACK generated by the Dante Controller or STcontroller software applications as a “trigger” to disable any active talk channels. The Global Kill Command can be generated by applications that incorporate the Studio Technologies’ proprietary method. This method utilizes sending a data command over the Ethernet connection. Select the desired mic kill configuration from the four choices. Off simply means that no remote talk control is supported.
MODEL 370A INTERCOM BELTPACK Compressor Active LED A yellow LED indicator is located on the bottom panel adjacent to the headset connector. Labeled COMP, the LED displays the status of the microphone audio compressor function. It will light whenever the input level from the microphone, along with the configured preamplifier gain, is such that the dynamic range of the talk signal is being controlled.
MODEL 370A INTERCOM BELTPACK the talk function. When released the talk function will turn off. Momentarily pressing (“tapping”) the button will cause the function to change states; off-to-on or on-to-off. Whenever the talk function is active the green LED will light. The button will not be lit when the function is not active. Disabled A button that is configured to the Disabled mode will never allow talk audio to be sent to the associated Dante audio output channel.
MODEL 370A INTERCOM BELTPACK headphone outputs. This prevents users with extended high-frequency sensitivity, such as hosts and guests associated with dog shows, from receiving undesirable audio content. To send a call signal is simple: just enable either or both of the talk buttons and simultaneously press and hold the call button. When call sending is active the orange LED associated with the call button will light.
MODEL 370A INTERCOM BELTPACK state. This allows one or both talk channels on a specific Model 370A that have been enabled to be remotely disabled. The reason for this function is simple. It’s common in intercom applications for users to enable a talk channel and then go “off headset,” forgetting that they’ve left that talk channel enabled. While they take a break or go to lunch, all other users are forced to listen to that channel which may include unwanted audio.
MODEL 370A INTERCOM BELTPACK recommended that each unit be physically marked, e.g., directly using a permanent marker or “console tape,” with its specific static IP address. If knowledge of a Model 370A’s IP address has been misplaced there is no reset button or other method to easily restore the unit to a default IP setting.
MODEL 370A INTERCOM BELTPACK tion. Then, after starting STcontroller, review the list of identified devices and select the specific Model 370A that interests you. Then select Version under the Device tab. A page will then display that will provide lots of useful information. This includes the application firmware version and well as details on the firmware present in the Ultimo integrated circuit.
MODEL 370A INTERCOM BELTPACK 6. At this time the Model 370A is operating under the newly-saved application firmware and the USB flash drive can be removed. But to be conservative, remove PoE power first and then remove the USB flash drive. 7. Confirm that the desired application firmware version has been correctly saved.
MODEL 370A INTERCOM BELTPACK • The configurable microphone input gain settings were modified to be compatible with the increased output level supplied by electret microphones. • The DIP switch assembly on the Model 370 is not present on the Model 370A. As such the belt clip no longer needs to be rotated and its mounting arrangement has been changed. • The user-accessible sidetone trim potentiometer found on the Model 370 is not present on the Model 370A.
MODEL 370A INTERCOM BELTPACK Specifications Power Source: Power-over-Ethernet (PoE): class 1 (very low power, ≤3.84 watts) per IEEE® 802.
MODEL 370A INTERCOM BELTPACK Appendix A STcontroller default Model 370A configuration values: Microphone Input – Electret Power: Off Microphone Input – Gain: 42 dB Headphone Output – Channel 1 Input Routes to: Left Headphone Output – Channel 2 Input Routes to: Right Sidetone – Level: Medium Button Operation – Channels 1 and 2: Push to Talk/Tap to Latch System – Mic Kill: Global Kill Command Model 370A User Guide Studio Technologies, Inc.
