Studio Technologies 371A User Manual Download Page 9

Model 371A User Guide 

Issue 1, June 2018 

Studio Technologies, Inc. 

Page 9

MODEL 371A

INTERCOM BELTPACK

tion which is available for download free of 

charge at www.audinate.com. Versions of 

Dante Controller are available to support 

Windows® and OS X® operating systems. 

The Model 371A uses the Ultimo 2-input/ 

2-output integrated circuit to implement the 

Dante architecture.
The two Dante transmitter (Tx) channels 

associated with the Model 371A’s Dante 

interface must be assigned to the desired 

receiver (Rx) channels. This achieves rout-

ing the Model 371A’s two talk output audio 

channels to the device (or devices) that will 

be “listening” to them. Within Dante Con-

troller a “subscription” is the term used for 

routing a transmitter flow (a group of output 

channels) to a receiver flow (a group of 

input channels). The number of transmitter 

flows associated with an Ultimo integrated 

circuit is limited to two. These can either  

be unicast, multicast, or a combination of 

the two. If the Model 371A’s transmitter 

channels need to be routed using more 

than two flows it’s possible that an interme-

diary device, such as the Studio Technolo-

gies Model 5422 Dante Intercom Audio 

Engine, can be used to “repeat” the signals. 

(Use the Model 5422’s pass-thru group con-

figuration mode to provide this resource.)
The two Dante receiver (Rx) channels 

associated with the Model 371A’s audio 

inputs also need to be routed to the Dante 

transmitter (Tx) channels provided by the 

desired source device. These two audio  

signals can be sent to the Model 371A’s 

headphone output.
The Model 371A supports an audio sample 

rate of 48 kHz with no pull-up/pull-down val-

ues available. The Model 371A can serve as 

the clock master for a Dante network but in 

most cases it will be configured to “sync” to 

another device that is serving as the “grand 

master” for the Dante implementation.

The Model 371A has a default Dante 

device name of 

ST-M371A-

 followed by a 

unique suffix. The suffix identifies the spe-

cific Model 371A 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

. Using the Dante 

Controller application the default device 

name and channel names can be revised 

as appropriate for the specific application.

Model 371A Configuration

Many of the Model 371A’s operating  

parameters can be configured to match 

the needs of specific applications. The  

STcontroller software application is used 

to observe a unit’s current configura-

tion and perform any changes that are 

required. No DIP switch settings or other 

local actions are used to configure the 

unit. This makes it imperative that the 

STcontroller software application be avail-

able for use in a personal computer that’s 

connected to the related LAN.
STcontroller is available free of charge  

on the Studio Technologies website  

(www. studio-tech.com/stcontroller) and is 

compatible with personal computers run-

ning Windows operating systems that are 

version 7 and later. STcontroller versions 

1.06.00 and later is required to support the 

Model 371A. If necessary, download and 

install STcontroller onto a designated per-

sonal computer. This personal computer 

must be on the same local area network 

(LAN) and subnet as the Model 371A unit 

or units that are to be configured.

Summary of Contents for 371A

Page 1: ...ed www studio tech com 50655 0618 Issue 1 User Guide Issue 1 June 2018 This User Guide is applicable for serial numbers M371A 02501 and later with application rmware 1 1 and later and Dante rmware 1 0...

Page 2: ...This page intentionally left blank...

Page 3: ...A User Guide Issue 1 June 2018 Studio Technologies Inc Page 3 MODEL 371A INTERCOM BELTPACK Table of Contents Revision History 4 Introduction 5 Getting Started 7 Operation 12 Technical Notes 16 Speci c...

Page 4: ...Issue 1 June 2018 Model 371A User Guide Page 4 Studio Technologies Inc MODEL 371A INTERCOM BELTPACK Revision History Issue 1 June 2018 1 Initial release...

Page 5: ...ing the STcontroller software application Con gurable parameters include electret microphone powering microphone pre ampli er gain sidetone level and talk button operation User features include microp...

Page 6: ...support electret microphones can be enabled if necessary The output of the microphone preamp and compressor is routed to an analog to digi tal converter ADC section that supports a sampling rate of 4...

Page 7: ...et interface The physi cal interconnection is made by way of a Neutrik etherCON RJ45 receptacle While compatible with standard RJ45 plugs etherCON allows a ruggedized and locking interconnection for h...

Page 8: ...ted etherCON connector or a standard RJ45 plug The Model 371A s Ethernet interface supports auto MDI MDI X so that a cross over cable will never be required Headset Connection The Model 371A provides...

Page 9: ...ll up pull down val ues available The Model 371A can serve as the clock master for a Dante network but in most cases it will be con gured to sync to another device that is serving as the grand master...

Page 10: ...12 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 associ ated with a headset that...

Page 11: ...e au dio can also be disabled by selecting Off Selecting Off would be useful only in spe cial applications such as during trouble shooting or where user talk audio is being returned as part of their l...

Page 12: ...mounted 4 pin female XLR connector should be plugged into the headset connector Using the Studio Technologies STcontroller software application the unit s con gura tion should have been selected to m...

Page 13: ...g is taking place it s possible that changing the mic preamp gain to the higher setting would be ben e cial Note that due to the design of the circuitry the compressor active LED will function whether...

Page 14: ...e sidetone audio should be excellent and will provide Model 371A users with a con dence signal that they are actively talking to other intercom users The exact sidetone level is con gured from among v...

Page 15: ...s the orange LED associated with the call button will not light By using a 20 kHz tone for call signaling the Model 371A is compatible with legacy intercom equipment including the vener able RTS BP 32...

Page 16: ...l 371A will respond to any such request and force all talk channels to their disabled state Technical Notes IP Address Assignment By default the Model 371A s Ethernet in terface will attempt to automa...

Page 17: ...hernet per formance a network that supports VoIP Quality of service QoS capability is rec ommended This can be implemented on virtually all contemporary managed Ether net switches There are even speci...

Page 18: ...USB interface The Model 371A implements a USB host function that directly supports connection of a USB ash drive The Model 371A s MCU updates its application rmware using a le named M371A bin The upda...

Page 19: ...ed reverse the steps and reat tached the cover using the four machine screws Note that upon power being applied to the Model 371A if a connected USB ash drive doesn t have the correct le M371A bin in...

Page 20: ...ng STcontroller The Model 371A offers a second meth od of activating the mic kill function This allows a data signal in additional to the Device ID command to activate mic kill The STcontroller softwa...

Page 21: ...ingle channel sum combination of audio input 1 and audio input 2 Compatibility intended for connection headsets with nominal impedance of 50 ohms or greater Maximum Output Voltage 3 8 Vrms 1 kHz 150 o...

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