Studio Technologies 236 Manual de usuario

studio-tech.com

User Guide

Issue 5, October 2021

This User Guide is applicable for serial numbers

M236-00151 and later with main firmware version 3.02 and later

and STcontroller software application version 3.05.00 and later.

50688-1021 Issue 5

Model 236 Announcer’s Console

This page intentionally left blank.

Model 236 User Guide Issue 5, October 2021

Studio Technologies, Inc. Page 3

MODEL 236

ANNOUNCER’S CONSOLE

Table of Contents

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

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

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

Dante Configuration ....................................................................... 12

Model 236 Configuration ................................................................ 14

Operation ........................................................................................ 23

Technical Notes .............................................................................. 31

Specifications ................................................................................. 39

Appendix A: STcontroller Default Configuration Values .................. 41

Appendix B: 3-Pin Header Connector Details ................................ 42

Appendix C: Block Diagram ........................................................... 43

Issue 5, October 2021 Model 236 User Guide

Page 4 Studio Technologies, Inc.

MODEL 236

ANNOUNCER’S CONSOLE

Revision History

Issue 5, October 2021:

• Documents change to Dante Aux Output operation when Hot Mic is selected.

Issue 4, May 2021:

• Documents new analog microphone input limiter function.

• Documents revised configuration name from LED Intensity to LED Intensity and Action.

• Documents two LED Intensity and Action modes.

Issue 3, October 2020:

• Revises text to reflect Audinate’s Inclusive Language Guidelines. The word “master,” in

reference to Dante® clocking, has been changed to “Leader.”

Issue 2, September 2020:

• Documents changes to Main 1 and Main 2 inputs and associated headphone monitoring.

• Documents addition of Sidetone Channel Routing feature.

• Adds technical note regarding level attenuation in Dante Aux and Talkback transmitter (output)

channels when Analog Mic Output is configured for Switched.

Issue 1, August 2020:

• Initial release.

Model 236 User Guide Issue 5, October 2021

Studio Technologies, Inc. Page 5

MODEL 236

ANNOUNCER’S CONSOLE

Introduction

The Model 236 Announcer’s Console provides

a combination of high-performance audio with

an extensive set of user features and configu-

rable resources. The unit is intended for use

in demanding broadcast sports, eSports, live

event, entertainment, and streaming broadcast

applications. With a few simple connections

the Model 236 can provide one on-air talent

with all the resources they need to support a

wide range of applications. The compact, rug-

ged steel enclosure is intended for tabletop

use, small enough for use “court-side” or in

a crowded booth, yet flexible enough for re-

mote production deployment. The Model 236

supports Dante® audio-over-Ethernet digital

media technology with AES67 compatibility for

integration into contemporary applications.

The Model 236 can integrate directly into

both Dante audio-over-Ethernet and standard

analog audio environments. With just a Power-

over-Ethernet (PoE) Gigabit network connec-

tion, a microphone, and a pair of headphones

a complete broadcast on-air position can be

created. With the addition of a second Ether-

net connection Redundant Dante can be sup-

ported. And by using the Model 236’s analog

microphone output a connection to a micro-

phone-level input on an associated remote I/O

interface or audio console can be supported.

With ten Dante audio inputs and an integrated

sidetone function, users can easily create their

desired headphone audio mix. They’ll enjoy

clear and “click-free” monaural or stereo audio

that can only help their on-air performance.

Six independent Dante talkback channels

allow users to communicate with a variety

of support personnel. Among the range of

operating capabilities includes the ability to

create talent cue (IFB) channels. This was

specifically included for REMI/At-Home ap-

plications. Provision has been made such that

a technician can “customize” the Model 236’s

Figure 1. Model 236 Announcer’s Console front and

back views

hardware. Option kits, purchased separately,

can be added to support functions such as

multi-pin headset connectors, remote control

inputs, and a low-voltage, low-current DC tally

output.

The Model 236 was designed to meet two main

goals: supporting great audio quality and pro-

viding an extensive set of configurable features.

Using the latest in audio integrated circuits and

advanced 32-bit audio processing, the unit’s

audio performance should meet or exceed that

of any audio console, standalone microphone

preamplifier, remote I/O interface, or outboard

A/D or D/A converter. With over 40 years of

professional audio experience, Studio Technolo-

gies takes audio performance seriously! And

while providing excellent technical specifica-

tions is a “must,” a device also has to “sound”

good before we feel its design is complete.

Issue 5, October 2021 Model 236 User Guide

Page 6 Studio Technologies, Inc.

MODEL 236

ANNOUNCER’S CONSOLE

The amount of flexibility provided in the Model

236 allows it to meet the needs of virtually all

on-air announcer applications. And using the

Studio Technologies’ STcontroller software

application makes “customizing” the opera-

tion of a Model 236 fast and simple. The unit’s

ability to handle both day-to-day and special-

ized situations makes it a unique product in the

market. For example, the pushbutton switches

and rotary encoders can be independently

configured with multiple choices that range

from simple to quite advanced. If a Model

236 can’t seem to be configured to meet an

application’s goals please contact Studio Tech-

nologies’ technical support for an application

review.

The Model 236 is part of a three-product fam-

ily that differ only in the number of talkback

channels provided. The Model 236 provides

six talkback channels, while the Model 232

provides two and the Model 234 provides four.

The Model 236, as with the other two models,

has a compact enclosure with overall dimen-

sions of 6.5 inches wide (16.5 cm), 2.9 inches

high (7.4 cm), and 4.9 inches deep (12.5 cm).

Weighing 2.1 pounds (0.95 kg), the enclosure

is made of steel to provide some “heft” to

minimize the chance of inadvertent movement.

The Model 236’s main, secondary, and FPGA

(programmable logic) firmware can be updated

using the USB port on the back of the unit; the

Dante firmware can be updated via an Ether-

net connection.

Setup, Configuration, and

Operation

Set up, configuration, and operation of the

Model 236 is simple. The unit includes two

Neutrik etherCON RJ45 connectors which

allow interfacing with single or redundant

Gigabit Ethernet networks. The primary net-

work connection can provide power to the

unit using a port on a Power-over-Ethernet

(PoE) network switch. Model 236’s power

can also be supplied from a 12 volt DC source

that is connected using a 4-pin XLR connec-

tor. A broadcast headset or handheld (“stick”)

microphone can be directly connected to the

unit’s 3-pin female XLR microphone input con-

nector. The input is compatible with dynamic or

condenser microphones. A P48 phantom power

source allows support for a wide range of con-

denser microphones. A 3-pin male XLR con-

nector provides an analog microphone output

for integration with inputs on related devices.

A configuration choice allows this output to be

active all the time (hot mic operation) or muted

or unmuted following the main output function.

A pair of stereo headphones, the headphone

connection from a stereo or monaural headset,

or even earbuds can be connected to the Model

236’s headphone output jack.

Audio signals are routed to and from the Model

236 using the Dante Controller software ap-

plication. This is available, free of charge, from

Audinate®, the creators of Dante. All Model 236

operating features are configured using the Stu-

dio Technologies’ STcontroller software applica-

tion. The extensive set of parameters allows the

unit’s functions to be tailored to meet the needs

of many, many applications. STcontroller is

available at no charge from the Studio Technol-

ogies’ website. Versions are available that are

compatible with the Windows® and macOS®

operating systems. STcontroller is a fast and

simple means of configuring, revising, saving,

and loading a unit’s operating parameters.

The Model 236’s front panel includes eight rota-

ry controls (encoders) which are used to adjust

the level of the Dante input signal sources as

they create an audio mix that is fed to both the

analog and Dante digital headphone outputs.

Using RGB (red-green-blue) LEDs, each rotary

encoder is illuminated and can display whether

or not signal is present on their associated au-

dio input channels. Two additional rotary con-

trols allow adjustment of sidetone level and the

overall level of the analog headphone output.

Model 236 User Guide Issue 5, October 2021

Studio Technologies, Inc. Page 7

MODEL 236

ANNOUNCER’S CONSOLE

Seven pushbutton switches allow the user to

control the status of the main outputs (digital

and analog) as well as the six talkback func-

tions. Extensive configuration choices allow

the operation of the pushbutton switches and

associated output channels to be optimized to

meet the needs of specific applications. For

example, the talkback functions can be inde-

pendently configured for talkback, talent cue-

ing (IFB), call signal (20 kHz tone), and other

related actions.

The Model 236’s one main and six talkback

pushbutton switches are illuminated to display

their operating status. For performance confir-

mation an integrated sidetone function allows

audio coming from the headset’s microphone

to be returned to the headset output.

Audio Quality

The Model 236’s audio performance is com-

pletely “pro.” A low-noise, wide dynamic-

range microphone preamplifier ensures that

microphone audio quality is preserved while

minimizes the chance of signal overload. The

gain of the microphone preamplifier can be

adjusted over a range of 20 to 65 dB in 1-

dB steps. A digitally controlled analog limiter

function allows the signal level to be automati-

cally adjusted to reduce the chance of signal

overload. A setting in STcontroller allows the

limiter function to be enabled or disabled as

desired. The limiter function applies only to

signals that are connected to the analog mi-

crophone input.

The output of the microphone preamplifier

is routed to an analog-to-digital conversion

(ADC) section that supports sampling rates

of 48 and 96 kHz. The audio signal, now in

the digital domain, routes through a 32-bit

microprocessor and associated programma-

ble logic and then on to the Dante interface

section where it is packetized and prepared

for transport over Ethernet. Ten Dante trans-

mitter (output) channels are provided: one

main, one aux, six talkback, and two head-

phone monitor output channels.

Audio input signals arrive into the Model 236

by way of eleven Dante receiver (input) chan-

nels and pass into the Model 236’s 32-bit logic

circuitry. Four channels are associated with

the main section, six are used for the talkback

listen sources, and one can serve as an alter-

nate microphone audio source. In addition to

being used for typical headphone monitoring,

the audio input associated with each talkback

channel can be used as part of a talent cue

(IFB) function. All channel routing, headphone

level control, signal detection, and sidetone

functions are performed within the digital do-

main. This preserves audio quality, enhances

performance, and provides flexibility, allow-

ing precise level control and mixing as well as

eliminating the need for analog audio signals

to pass through passive level controls (poten-

tiometers). The audio signals destined for the

analog headphone output are sent to a high-

performance 2-channel digital-to-analog con-

verter and then on to robust driver circuitry.

Dante Audio-over-Ethernet

Audio data is sent to and received from the

Model 236 using Dante audio-over-Ethernet

media networking technology. As a Dante-

compliant device, the Model 236’s ten Dante

transmitter (output) channels and eleven Dante

receiver (input) channels can be assigned

(routed or “subscribed”) using the Dante Con-

troller software application. To minimize the

chance of a flow limitation, the Model 236’s

Dante transmitter and receiver channels sup-

port 32 Dante flows, 16 in each direction.

The digital audio’s bit depth is up to 32 with a

sample rate of 48 or 96 kHz. Bi-color LEDs,

located on the unit’s back panel, provide status

indications related to the Ethernet network and

Dante interface performance.

The Model 236 is compliant with the AES67

interoperability standard. In addition, the unit

Issue 5, October 2021 Model 236 User Guide

Page 8 Studio Technologies, Inc.

MODEL 236

ANNOUNCER’S CONSOLE

is compatible with Audinate’s Dante Domain

Manager™ (DDM) software application. DDM

offers an enhanced set of network control

and monitoring features, making it ideal for

security-conscious applications. This may

also allow the Model 236’s audio channels

to support SMPTE® ST 2110-30.

Ethernet Data and PoE

The Model 236 connects to one or two local

area networks (LANs) by way of two Gigabit

(GigE) twisted-pair Ethernet interfaces. These

1000BASE-T interconnections are made by

way of Neutrik® etherCON RJ45 connectors.

While compatible with standard RJ45 plugs,

etherCON allows a ruggedized and locking

interconnection for harsh or high-reliability

environments. The two Ethernet interfaces

can be configured, using the Dante Controller

software applications, to serve in the Dante

Switched or Redundant modes.

The Model 236’s operating power can be

provided by way of its Primary-PoE Ethernet

interface using the 802.3af Power-over-

Ethernet (PoE) standard. PoE allows fast and

efficient interconnection with an associated

data network. Alternately, an external source

of nominal 12 volts DC can be connected to

power the unit. If both are connected then

PoE will serve as the active power source.

Future Capabilities and

Firmware Updating

The Model 236 was designed so that in the

future its capabilities and performance can

be easily enhanced. A USB type A connector,

located on the unit’s back panel, allows the

Main and FPGA firmware files to be updated

using a USB flash drive. The Model 236 uses

the Broadway™ integrated circuit from Audi-

nate to implement its Dante interface. The firm-

ware in this integrated circuit can be updated

via an Ethernet connection helping to ensure

that its capabilities remain up to date.

Getting Started

What’s Included

Included in the shipping carton are a Model

236 Announcer’s Console and instructions on

how to obtain a copy of this guide. As a de-

vice that can be Power-over-Ethernet (PoE)

powered, no external power source is pro-

vided. This is because in most applications

an Ethernet switch with PoE capability will be

utilized. It’s also possible to connect an exter-

nal source of 12 volts DC to power the Model

236. If this is the case then a power supply

would need to be obtained separately.

Connections

In this section signal interconnections will

be made using the connectors located on

the back of the Model 236’s enclosure. One

or two Ethernet connections will be made

using either standard RJ45 patch cables

or etherCON protected RJ45 plugs. The

Ethernet data connection associated with the

Primary-PoE RJ45 connector is compatible

with Power-over-Ethernet (PoE). If desired,

an Ethernet connection made to the Second-

ary Ethernet connector can provide access

to a Redundant Dante network. Or it can be

utilized as an active “loop through” connec-

tion associated with the Primary-PoE Ethernet

connection. If PoE is not going to be utilized,

or a redundant source of power is desired, a

source of 12 volts DC can be connected by

way of a 4-conductor XLR connector.

A microphone can be connected using a

cable-mounted 3-pin male XLR connector.

A set of headphones, the headset portion

of a broadcast-style headset, or an earpiece

will be connected by way of a ¼-inch plug.

If desired, the Model 236’s analog micro-

phone output may be interfaced with other

equipment using a cable terminated with

a standard 3-pin female XLR connector.

Model 236 User Guide Issue 5, October 2021

Studio Technologies, Inc. Page 9

MODEL 236

ANNOUNCER’S CONSOLE

For special applications the Model 236’s

internal circuit boards contain 3-pin “header”

connectors that allow access to various func-

tions. In addition, there are two spare con-

nector locations located on the Model 236’s

back panel. A technician can add connectors

and wire them to the headers such that ap-

plication-specific needs can be supported. For

example, a 6- or 7-pin XLR connector can be

added to support direct connection of broad-

cast-style headsets. Contact closures can be

interfaced to the Model 236’s circuitry, allow-

ing external switches to activate the main and

talkback functions. A low-voltage, low-current

tally output associated with the main function

is also available. Refer to the Technical Notes

section of this guide for details.

One or Two Ethernet Connections

One 1000BASE-T Gigibit Ethernet (GigE)

connection is required for Model 236 opera-

tion and can provide both Ethernet data and

power by way of Power-over-Ethernet (PoE)

for the Model 236’s circuitry. A 10BASE-T

(10 Mb/s) or 100BASE-TX (100 Mb/s) con-

nection is not sufficient.

A second 1000BASE-T (GigE) connection

can be made if Redundant Dante is desired.

(For this functionality to be active the Model

236’s network configuration must be set for

Redundant within the Dante Controller soft-

ware application.) PoE is not supported on

the Secondary Ethernet connection. Again,

a 10BASE-T or 100BASE-TX connection is

not sufficient. The Secondary Ethernet con-

nection can also be used as a “loop through”

port such as would be provided by an Eth-

ernet switch. (This requires that the Model

236’s network configuration within the Dante

Controller software application be set for

Switched.) Switched mode is the default set-

ting but using the Secondary port in this mode

for applications other than troubleshooting

is not recommended. The unit will function

reliably but “daisy chaining” Ethernet signals

can limit flexibility and present a failure point;

it’s best if each Ethernet interface connects

directly to a port on an Ethernet switch.

The Ethernet connections are made by way

of two Neutrik etherCON protected RJ45

connectors that are located on the back

of the Model 236’s enclosure. These allow

connection by way of cable-mounted ether-

CON connectors or standard RJ45 plugs. The

Model 236’s Ethernet interfaces support auto

MDI/MDI-X so that crossover cables are not

required.

External 12 Volts DC Input

An external source of 12 volts DC can be

connected to the Model 236 by way of a

4-pin male XLR connector which is located

on the unit’s back panel. While the require-

ment for the external source is nominally 12

volts, correct operation will take place over a

10 to 18 volts DC range. The Model 236 re-

quires a maximum of 550 milliamperes (0.55

amperes) at 12 volts DC for correct operation.

The DC source should be terminated on a

4-pin female XLR connector with pin 1 nega-

tive (–) and pin 4 positive (+).

If an external power source is required, the

PS-DC-02 power supply, available as an

option from Studio Technologies, is directly

compatible with the Model 236. Its AC mains

input allows connection to 100-240 volts,

50/60 Hz with an output of 12 volts DC,

1.5 amperes maximum. Its DC output is

terminated on a 4-pin female XLR connector.

As previously discussed in this guide, an

Ethernet connection that provides Power-

over-Ethernet (PoE) can serve as the Model

236’s power source. Alternately, an external

12 volts DC source can be connected. For re-

dundancy, both PoE and the external source

can be connected at the same time. If both

PoE and an external 12 volts DC source are

Issue 5, October 2021 Model 236 User Guide

Page 10 Studio Technologies, Inc.

MODEL 236

ANNOUNCER’S CONSOLE

connected, power will be drawn only from the

PoE supply. If the PoE source becomes inop-

erative the 12 volts DC source will provide the

Model 236’s power. No interruption in opera-

tion will occur during a power source transition.

Analog Microphone Input

Using a configuration selection within the

STcontroller software application, the Model

236’s microphone audio source can be select-

ed. In most cases a local microphone will

be connected and Analog will be selected.

Alternately, an audio signal can be provided

by way of a Dante receiver (input) channel.

In this section details on connecting an analog

microphone will be provided.

The Model 236 provides a 3-pin female XLR

connector, located on the back panel, to allow

an analog microphone to be connected. The

microphone can be a standalone handheld

(“stick”) type, a stand- or arm-mounted type, or

can be part of a broadcast-style headset. The

Model 236’s analog microphone input is direct-

ly compatible with balanced dynamic or P48-

compatible “phantom” powered microphones.

A microphone should be connected such that

its associated 3-pin male XLR connector has

pin 1 as common, pin 2 as signal high (+), and

pin 3 as signal low (–).

A configuration setting in STcontroller allows

the Model 236’s P48 phantom power source

to be enabled or disabled as desired. Another

setting allows the gain of the preamplifier cir-

cuitry associated with the analog microphone

input to be selected. In addition, a configura-

tion setting allows the limiter function to be

enabled or disabled as desired. Details on

configuration settings will be described later

in this guide.

While the Model 236 provides an excellent

source of P48 phantom power, it’s possible

that an input on an associated piece of equip-

ment is already providing microphone power.

This input could be connected to the Model

236 by way of the analog microphone output

connector. This would not create a problem

since the circuitry that passes audio from the

Model 236’s analog microphone input con-

nector to the Model 236’s analog microphone

output connector will also pass microphone

power from output-to-input without interrup-

tion. This situation could be relevant in cases

where the Model 236’s analog microphone

output connector is interfaced with a micro-

phone input on an associated ENG camera,

audio console, microphone mixer, remote I/O

interface, or similar equipment. The micro-

phone inputs on such devices will often pro-

vide phantom power capability which may,

or may not, be enabled.

Analog Microphone Output

A 3-pin male XLR connector on the Model

236’s back panel provides an analog micro-

phone-level output that’s directly related to

the analog microphone input. Technically this

output is identical to the signal that’s con-

nected to the analog microphone input but

with a solid-state muting circuit in series with

the interconnection. A configuration choice in

STcontroller allows the operation of the ana-

log microphone output to be selected. The

choices are to have the analog microphone

output active at all times or for it to also mute

whenever the Dante Main transmitter (output)

channel mutes.

If the analog microphone output is configured

to be active at all times it will provide what is

effectively an analog “hot mic” output; a signal

that is connected to the analog microphone

input will continuously “pass through” to the

analog microphone output. No Model 236

action will impact this signal. If the analog

microphone output is configured to follow the

status of the Dante Main transmitter (output)

then the analog microphone input signal will

pass through to the analog microphone output

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