Studio Technologies 381 Manual de usuario

www.studio-tech.com

User Guide

Issue 1, January 2019

This User Guide is applicable for serial numbers

M381-00151 and later with application ﬁrmware 1.1 and later

50663-0119, Issue 1

Model 381 On-Air Beltpack

This page intentionally left blank.

Model 381 User Guide Issue 1, January 2019

Studio Technologies, Inc. Page 3

MODEL 381

ON-AIR BELTPACK

Table of Contents

Revision History ........................................................... 4

Introduction ................................................................... 5

Getting Started ............................................................. 8

Operation ...................................................................... 14

Technical Notes ............................................................ 18

Speciﬁcations ............................................................... 22

Appendix A ................................................................... 23

Issue 1, January 2019 Model 381 User Guide

Page 4 Studio Technologies, Inc.

MODEL 381

ON-AIR BELTPACK

Revision History

Issue 1, January 2019:

• Initial release.

Model 381 User Guide Issue 1, January 2019

Studio Technologies, Inc. Page 5

MODEL 381

ON-AIR BELTPACK

Introduction

The Model 381 On-Air Beltpack offers a

unique combination of audio resources

to directly support a complete broadcast

“stand-up” on-air position. Using Dante®

audio-over-Ethernet technology, the unit

provides main and talkback output channels,

talent cue (IFB) input, and sidetone capabili-

ties, as well as essential user controls in

a compact, portable package. The Model

381 is compatible with the Dante Domain

Manager™ (DDM) software application and

is AES67-compliant for direct integration into

many contemporary networked audio appli-

cations.

Optimized for broadcast sports and live en-

tertainment events, eSports, news-gathering,

and streaming broadcast applications, the

Model 381 allows incredibly simple deploy-

ment while maintaining “pro” audio quality

and an intuitive user experience. With just

a Power-over-Ethernet (PoE) connection, a

dynamic or phantom-powered microphone,

and a pair of headphones or an earpiece,

the unit will be ready for “on-air” deploy-

ment. The STcontroller software application

is used for conﬁguring operating parameters

including microphone preampliﬁer gain, P48

phantom power, headphone signal routing,

sidetone operation, and talkback button

action. The Model 381’s audio quality is

excellent, with low distortion, low noise, and

high headroom. Careful circuit design and

rugged components ensure long, reliable

operation.

Applications

The Model 381 provides an “all-Dante”

solution for one on-air talent location. Two

Dante audio input channels supply the user

with their talent cue (IFB) signals. Should

the cue signal be “mix-minus” an integrated

sidetone function can provide the user with

a microphone conﬁdence signal. Two Dante

audio output channels, one designated

as main (for “on-air” use) and the other

talkback, are routed via the associated

local-area network (LAN) to inputs on

Dante-compatible devices. A pushbutton

switch, located on the Model 381’s top

panel, provides a combination talkback

and “cough” function. When talkback is

not active audio associated with the micro-

phone preampliﬁer is routed to the Dante

main output channel; the Dante talkback

output channel is muted. When the talkback

function is active audio is muted on the

Dante main output channel and activated

on the Dante talkback output channel. The

audio switching is performed in the digital

domain and is virtually “click-free.”

Figure 1. Model 381 On-Air Beltpack top and bottom views

Issue 1, January 2019 Model 381 User Guide

Page 6 Studio Technologies, Inc.

MODEL 381

ON-AIR BELTPACK

Setup and Operation

Set up and operation of the Model 381 is

simple. An etherCON® RJ45 jack is used

to interconnect with a standard twisted-pair

Ethernet port associated with a PoE-enabled

network switch. This connection provides

both power and bidirectional digital audio.

A broadcast headset or handheld (“stick”)

microphone can be directly connected to the

unit’s 3-pin XLR microphone input connec-

tor. This input is compatible with dynamic or

condenser microphones. An integrated P48

phantom power source can be enabled if

desired. Stereo headphones, the headphone

connections from a stereo or monaural

headset, or even a monaural earpiece are

connected to the headphone output jack.

Two “push-in/push-out” rotary controls (po-

tentiometers or “pots”) make it easy to set

the level of the talent cue signals level being

sent to the 2-channel headphone output.

The STcontroller software application is

used to conﬁgure the wide range of Model

381 operating parameters. This allows the

unit’s performance to be optimized to meet

the needs of speciﬁc applications. The

Model 381’s ultra-compact enclosure is

made from an aluminum alloy which offers

both light weight and ruggedness. A stain-

less steel “belt clip,” located on the back

of the unit, allows direct attachment to a

user’s clothing. The top surface is curved

to minimize the chance of the unit interfering

with clothing or being readily observable

“on camera.”

Ethernet Data and PoE

The Model 381 connects to a local area net-

work (LAN) by way of a standard 100 Mb/s

twisted-pair Ethernet interface. The physical

100BASE-TX interconnection is made by

way of a Neutrik® etherCON RJ45 connec-

tor. While compatible with standard RJ45

plugs, etherCON allows a ruggedized and

locking interconnection for harsh or high-

reliability environments. The Model 381’s

operating power is provided by way of the

Ethernet interface using the 802.3af Power-

over-Ethernet (PoE) standard. This allows

fast and efﬁcient interconnection with the

associated data network. To support PoE

power management, the Model 381’s PoE

interface enumerates (reports) to the power

sourcing equipment (PSE) that it’s a class 2

(low power) device.

Dante Audio-over-Ethernet

Audio data is sent to and received from

the Model 381 using the Dante audio-over-

Ethernet media networking technology.

The Model 381’s two Dante output (trans-

mitter) and two Dante input (receiver) audio

channels can be assigned to other devices

(routed) using the Dante Controller soft-

ware application. The Dante transmitter and

receiver channels are limited to supporting

four Dante ﬂows, two in each direction. The

digital audio’s bit depth is up to 24 with a

sampling rate of 44.1, 48, 88.2, or 96 kHz.

Two bi-color LEDs provide an indication of

the Dante connection status.

The Model 381 is compatible with the AES67

interoperability standard. In this mode the

two transmitter (output) channels will func-

tion in multicast; unicast is not supported.

In addition, the unit is compatible with the

Dante Domain Manager (DDM) software

application.

Audio Quality

The Model 381’s performance is completely

“pro,” making it appropriate for use in a

wide-range of applications. A low-noise, wide

dynamic-range microphone preampliﬁer

and associated voltage-controlled-ampliﬁer

(VCA) dynamics controller (“compressor”)

circuit ensures that mic input audio quality

Model 381 User Guide Issue 1, January 2019

Studio Technologies, Inc. Page 7

MODEL 381

ON-AIR BELTPACK

is preserved while minimizing the chance

of signal overload. A conﬁguration choice

allows selection of the signal source for the

Dante main output channel. The choices

are either the output of the microphone

preamp or the output of the compressor

circuit. These choices are referred to as

“pre-compressor” or “post-compressor.” The

ADC section utilizes a high-performance

integrated circuit that supports sampling

rates of 44.1, 48, 88.2, and 96 kHz with

a bit depth of up to 24. The audio signal,

now in the digital domain, routes through a

32-bit microprocessor and on to the Dante

interface section where it is packetized and

prepared for transport over Ethernet.

Audio input signals arrive via the Dante

receiver channels and pass into the Model

381’s microprocessor. As with the Dante

audio output channels, the sampling rate

can be 44.1, 48, 88.2, or 96 kHz with a bit

depth of up to 24. Channel routing, head-

phone level control, and sidetone creation

are performed in the digital domain. This

provides ﬂexibility, allows precise control,

and keeps the two controls from having

to directly handle analog audio signals.

The audio channels destined for the head-

phone output channels are sent to a high-

performance digital-to-analog converter

and then on to robust driver circuitry. High

signal levels can be provided to a variety

of headsets, headphones, and earpieces.

Conﬁguration Flexibility

The Model 381 can be conﬁgured to meet

the needs of speciﬁc applications and user

preferences. All conﬁguration tasks are

performed using the STcontroller personal

computer software application which is

compatible with version 7 and later of the

Windows® operating systems. There are

no mechanical switch settings or button-

press sequences required to conﬁgure how

the unit functions. Selectable parameters

include microphone preampliﬁer gain, P48

phantom power on/off, headphone output

performance, sidetone operation, button

action, and main output audio source.

The gain of the microphone preampliﬁer

can be selected from among ﬁve choices.

This allows the Model 381 to match the out-

put sensitivity of a range of handheld and

headset-associated microphones. A low-

noise source of P48 phantom power can

be enabled if required to support condenser

(capacitor) microphones. The two Dante

input audio sources and the way in which

they are assigned to the headphone output

channels can be conﬁgured. In addition,

the operation of the two rotary controls can

be selected. These unique choices allow

almost any required headphone monitoring

situation to be implemented. Whether for

use in on-air sports, in an eSports broad-

cast, or as a production support tool, the

Model 381 should be able to achieve the

desired conﬁguration.

The integrated sidetone function can be

conﬁgured to operate from among three

choices. This allows audio associated with

the microphone input and microphone pre-

ampliﬁer to be returned to the headphone

output as required. Sidetone can be impor-

tant as some applications may provide a

“mix-minus” talent cue signal that doesn’t

include the user’s own voice content. A

conﬁguration selection allows the talkback

button to be selected for a push to mute or

latching operation. The Dante main output

channel can be selected to its audio source

to be “pre-” or “post-” the dynamics control

circuitry.

Issue 1, January 2019 Model 381 User Guide

Page 8 Studio Technologies, Inc.

MODEL 381

ON-AIR BELTPACK

Future Capabilities and

Firmware Updating

The Model 381 was designed so that its

capabilities and performance can be en-

hanced in the future. A USB connector,

located on the unit’s main circuit board

(underneath the unit’s cover), allows the

application ﬁrmware (embedded software)

to be updated using a USB ﬂash drive.

The Model 381 uses Audinate’s Ultimo™

integrated circuit to implement the Dante

interface. The ﬁrmware in this integrated

circuit can be updated via the Ethernet con-

nection, helping to ensure that its capabili-

ties remain up to date.

Getting Started

What’s Included

Included in the shipping carton will be a

Model 381 On-Air Beltpack and a printed

copy of this guide. As a device that is

Power-over-Ethernet (PoE) powered,

no external power source is provided.

Connections

In this section signal interconnections will

be made using the three connectors located

on the bottom of the Model 381’s enclosure.

An Ethernet data connection with Power-

over-Ethernet (PoE) capability will be made

using either a standard RJ45 patch cable

or an etherCON protected RJ45 plug.

A microphone will be connected using a

cable-mounted 3-pin male XLR connector.

A set of headphones or an earpiece will be

connected by way of a 2- or 3-conductor

¼-inch plug.

Ethernet Connection with PoE

A 100BASE-TX Ethernet connection that

supports Power-over-Ethernet (PoE) is

required for Model 381 operation. This one

connection will provide both the Ethernet

data interface and power for the Model

381’s circuitry. A 10BASE-T connection is

not sufﬁcient as Dante does not support

this Ethernet protocol. And a 1000BASE-T

(“GigE”) connection is not supported unless

it can automatically “fall back” to 100BASE-

TX operation. The Model 381 supports

Ethernet switch power management,

enumerating itself as a PoE class 2 device.

The Ethernet connection is made by way

of a Neutrik etherCON protected RJ45 con-

nector that is located on the bottom of the

Model 381’s enclosure. This allows connec-

tion by way of a cable-mounted etherCON

connector or a standard RJ45 plug. The

Model 381’s Ethernet interface supports

auto MDI/MDI-X so that a “cross-over” or

“reversing” cable will never be required.

Ethernet Connection without PoE

As previously discussed in this guide, the

Model 381 was designed such that the

Ethernet connection will provide both data

and Power-over-Ethernet (PoE) power.

There may be situations where the as-

sociated Ethernet switch does not provide

PoE power. In such cases an external PoE

midspan power injector can be used. If the

selected midspan power injector is 802.3af-

compatible it should function correctly.

Midspan units are available from a variety

of sources, including many online retailers.

Microphone Input

The Model 381 provides a 3-pin female

XLR connector which allows a balanced dy-

namic or phantom-powered condenser mi-

crophone to be connected. The microphone

can be a standalone handheld (“stick”) type

or can be part of a broadcast-style head-

set. The Model 381’s microphone input is

directly compatible with balanced dynamic

Model 381 User Guide Issue 1, January 2019

Studio Technologies, Inc. Page 9

MODEL 381

ON-AIR BELTPACK

or P48 phantom powered microphones. A

microphone should be connected such that

its common is on connector pin 1, its signal

high (+) is on connector pin 2, and its sign

low (–) is on connector pin 3. An STcon-

troller conﬁguration setting allows the P48

microphone power sources to be enabled or

disabled as desired. Details on conﬁguring

the unit will be described later in this guide.

Headphone Output

The Model 381 provides a 2-channel

(“stereo”) headphone output by way of a

3-conductor ¼-inch phone jack. Devices

such as stereo headphones or “dual-ear”

broadcast-style headsets can be directly

connected using a 3-conductor ¼-inch

plug. Following the usual convention the

left channel should be terminated on the

tip lead, the right channel on the ring lead,

and common on the sleeve lead.

It’s also possible to use a monaural (“single-

ear”) headset or broadcast-type single

earbud as long as sufﬁcient care is taken.

If a 3-conductor ¼-inch plug is used by the

device it should be wired such that the tip

lead is connected to the positive terminal

of the transducer and the sleeve lead is

connected to the negative or common lead

of the transducer; the plug’s ring should

be left unconnected. But it’s also likely that

the monaural device will be terminated on

a 2-conductor (tip and sleeve) ¼-inch plug.

When a plug of this type is inserted into the

Model 381’s headphone output connector

(jack) the Model 381’s right headphone out-

put channel will be shorted. (This will occur

since the ring lead will be directly shorted to

the sleeve lead.) This can lead to stress on

the Model 381’s right channel headphone

output circuitry as well as drawing extra cur-

rent from the output stage. To prevent this

condition the Headphone Output – Controls

(A/B) mode conﬁguration choice should be

set for Single-Channel Mono. This disables

the right headphone output channel and

sends the listen audio source or sources

only to the left headphone output channel.

Refer to a later section in this guide for de-

tails on conﬁguring the headphone output.

Dante Conﬁguration

For audio to pass to and from the Model

381 requires conﬁguration of several

Dante-related parameters. These conﬁgu-

ration settings will be stored in non-volatile

memory within the Model 381’s circuitry.

Conﬁguration will typically be done with the

Dante Controller software application which

is available for download free of charge at

www.audinate.com. Versions of Dante Con-

troller are available to support Windows and

OS X® operating systems. The Model 381

uses the Ultimo 2-input/2-output integrated

circuit to implement the Dante architecture.

The two Dante transmitter (Tx) channels

associated with the Model 381’s Dante

interface must be assigned to the desired

receiver (Rx) channels. This achieves rout-

ing the Model 381’s two output audio chan-

nels to the device (or devices) that will be

“listening” to them. Within Dante Controller

a “subscription” is the term used for routing

a transmitter ﬂow (a group of output chan-

nels) 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 uni-

cast, multicast, or a combination of the two.

If the Model 381’s Dante transmitter chan-

nels need to be subscribed (routed) to 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.

The two Dante receiver (Rx) channels as-

sociated with the Model 381’s audio inputs

Issue 1, January 2019 Model 381 User Guide

Page 10 Studio Technologies, Inc.

MODEL 381

ON-AIR BELTPACK

also need to be subscribed (routed) with

the desired Dante transmitter (Tx) chan-

nels. These two audio signals will provide a

Model 381 user with their headphone cue

signals.

The Model 381 has a default Dante device

name of ST-M381- and a unique sufﬁx.

The sufﬁx identiﬁes the speciﬁc Model 381

that is being conﬁgured. The sufﬁx’s actual

alpha and/or numeric characters relate to

the MAC address of the unit’s Ultimo inte-

grated circuit. The two Dante transmitter

(Tx) channels have default names of Main

and Talkback. The two Dante receiver (Rx)

channels have default names of Head-

phone Ch1 and Headphone Ch2. Using

Dante Controller, the default device name

and channel names can be revised as ap-

propriate for the speciﬁc application.

The Model 381 supports audio sample rates

of 44.1, 48, 88.2, and 96 kHz. A setting in

Dante Controller is used to conﬁgure the

desired sample rate. The Model 381 can

serve as the clock master for a Dante net-

work but in most cases, it will be conﬁgured

to “sync” to another device. No clock conﬁg-

uration settings associated with the Model

381 will typically require conﬁguration within

Dante Controller.

Model 381 Conﬁguration

The STcontroller software application is

used to conﬁgure the way in which the Mod-

el 381 functions. No DIP switch settings or

other local actions are used to conﬁgure the

unit. This makes it imperative that STcon-

troller be available for convenient use in a

personal computer that’s connected to the

related LAN.

Installing STcontroller

STcontroller is available free of charge on

the Studio Technologies website (www.

studio-tech.com/stcontroller). STcontroller

versions 1.08.00 and later will fully support

the Model 381. If required, download and in-

stall STcontroller onto a designated personal

computer. This personal computer must be

on the same local area network (LAN) and

subnet as the Model 381 unit or units that

are to be conﬁgured. Immediately after start-

ing STcontroller the application will locate the

devices that it can control. The Model 381 unit

or units will appear in the device list. Use the

Identify command to allow easy recognition of

a speciﬁc Model 381 unit. Double-clicking on

a device name will cause the associated con-

ﬁguration menu to appear. Review the current

conﬁguration and make changes as required.

Parameters

The conﬁgurable functions include:

• P48 phantom power on/off status

• Microphone preampliﬁer gain

• Headphone output routing and level

control operation

• Sidetone operation and level

• Talkback button operation

• Main output audio source

Changes made using STcontroller will be

immediately reﬂected in the unit’s operation.

No “reboot” of the Model 381 is required.

Each time a change is made the talkback

button on the top panel will ﬂash orange in

two quick sequences to indicate that a com-

mand from STcontroller has been received.

Microphone Input – P48 Phantom Power

STcontroller allows selection of the on/off

status of the microphone input’s P48 phantom

power source. The on/off status is displayed

by way of an LED, red in color, located on

the bottom panel adjacent to the microphone

input connector. Select the status of the P48

source to meet the needs of the connected

microphone.

Otros manuales para 381

Tabla de contenidos

Otros manuales de Transmisor de Studio Technologies

Studio Technologies

Studio Technologies 362A Manual de usuario

Manuales populares de Transmisor de otras marcas

NIVELCO

NIVELCO EasyTREK SCA-300 Series Manual del propietario

Honeywell

Honeywell 5816WMBR Manual de usuario

Kamstrup

Kamstrup READy MTU Instrucciones de funcionamiento

Omega

Omega ZW Series Manual de usuario

ABB

ABB Field 264H Guía

Alinco

Alinco DJ-V17T Manual de usuario

Dejero

Dejero EnGo 3x Manual de usuario

Rosemount

Rosemount 4600 Manual de usuario

Speaka Professional

Speaka Professional 2342740 Manual de usuario

trubomat

trubomat GAB 1000 Manual de usuario

Teledyne Analytical Instruments

Teledyne Analytical Instruments LXT-380 Manual de usuario

Rondish

Rondish UT-11 Manual de usuario

MG 10JRE Manual de usuario

Burkert

Burkert 8177 Manual de usuario

Firetide

Firetide HotPort 3203 Manual

Tele Radio

Tele Radio T9-02 Manual de usuario

Rotronic

Rotronic HygroFlex HF3 Series Manual de usuario

Jamara

Jamara FCX6 Pro Tel Manual de usuario