Extron electronics MVC 121 Plus User Manual

MVC 121 Plus

Three Input Stereo Mixer with DSP

User Guide

Audio Products:

Mixers and Processors

68-1937-01 Rev. C

01 19

Safety Instructions

Safety Instructions • English

WARNING: This symbol, ,when used on the product, is

intended to alert the user of the presence of uninsulated dangerous
voltage within the product’s enclosure that may present a risk of electric
shock.

ATTENTION: This symbol, , when used on the product, is intended

to alert the user of important operating and maintenance (servicing)
instructions in the literature provided with the equipment.

For information on safety guidelines, regulatory compliances, EMI/EMF
compatibility, accessibility, and related topics, see the Extron Safety and
Regulatory Compliance Guide, part number 68-290-01, on the Extron
website, www.extron.com.

Sicherheitsanweisungen • Deutsch

WARNUNG: Dieses Symbol auf dem Produkt soll den Benutzer

darauf aufmerksam machen, dass im Inneren des Gehäuses dieses
Produktes gefährliche Spannungen herrschen, die nicht isoliert sind und
die einen elektrischen Schlag verursachen können.

VORSICHT: Dieses Symbol auf dem Produkt soll dem Benutzer in

der im Lieferumfang enthaltenen Dokumentation besonders wichtige
Hinweise zur Bedienung und Wartung (Instandhaltung) geben.

Weitere Informationen über die Sicherheitsrichtlinien, Produkthandhabung,
EMI/EMF-Kompatibilität, Zugänglichkeit und verwandte Themen finden Sie in
den Extron-Richtlinien für Sicherheit und Handhabung (Artikelnummer
68-290-01) auf der Extron-Website, www.extron.com.

Instrucciones de seguridad • Español

ADVERTENCIA: Este símbolo, , cuando se utiliza en el producto,

avisa al usuario de la presencia de voltaje peligroso sin aislar dentro del
producto, lo que puede representar un riesgo de descarga eléctrica.

ATENCIÓN: Este símbolo, , cuando se utiliza en el producto, avisa

al usuario de la presencia de importantes instrucciones de uso y
mantenimiento recogidas en la documentación proporcionada con el
equipo.

Para obtener información sobre directrices de seguridad, cumplimiento
de normativas, compatibilidad electromagnética, accesibilidad y temas
relacionados, consulte la Guía de cumplimiento de normativas y seguridad
de Extron, referencia 68-290-01, en el sitio Web de Extron, www.extron.com.

Instructions de sécurité • Français

AVERTISSEMENT : Ce pictogramme, , lorsqu’il est utilisé sur le

produit, signale à l’utilisateur la présence à l’intérieur du boîtier du
produit d’une tension électrique dangereuse susceptible de provoquer
un choc électrique.

ATTENTION : Ce pictogramme, , lorsqu’il est utilisé sur le produit,

signale à l’utilisateur des instructions d’utilisation ou de maintenance
importantes qui se trouvent dans la documentation fournie avec le
matériel.

Pour en savoir plus sur les règles de sécurité, la conformité à la
réglementation, la compatibilité EMI/EMF, l’accessibilité, et autres sujets
connexes, lisez les informations de sécurité et de conformité Extron, réf.
68-290-01, sur le site Extron, www.extron.com.

Istruzioni di sicurezza • Italiano

AVVERTENZA: Il simbolo, , se usato sul prodotto, serve ad

avvertire l’utente della presenza di tensione non isolata pericolosa
all’interno del contenitore del prodotto che può costituire un rischio di
scosse elettriche.

ATTENTZIONE: Il simbolo, , se usato sul prodotto, serve ad

avvertire l’utente della presenza di importanti istruzioni di funzionamento
e manutenzione nella documentazione fornita con l’apparecchio.

Per informazioni su parametri di sicurezza, conformità alle normative,
compatibilità EMI/EMF, accessibilità e argomenti simili, fare riferimento
alla Guida alla conformità normativa e di sicurezza di Extron, cod. articolo
68-290-01, sul sito web di Extron, www.extron.com.

Instrukcje bezpieczeństwa • Polska

OSTRZEŻENIE: Ten symbol, , gdy używany na produkt, ma na celu

poinformować użytkownika o obecności izolowanego i niebezpiecznego
napięcia wewnątrz obudowy produktu, który może stanowić zagrożenie
porażenia prądem elektrycznym.

UWAGI: Ten symbol, , gdy używany na produkt, jest przeznaczony do

ostrzegania użytkownika ważne operacyjne oraz instrukcje konserwacji
(obsługi) w literaturze, wyposażone w sprzęt.

Informacji na temat wytycznych w sprawie bezpieczeństwa, regulacji
wzajemnej zgodności, zgodność EMI/EMF, dostępności i Tematy pokrewne,
zobacz Extron bezpieczeństwa i regulacyjnego zgodności przewodnik, część
numer 68-290-01, na stronie internetowej Extron, www.extron.com.

Инструкция по технике безопасности • Русский

ПРЕДУПРЕЖДЕНИЕ: Данны й символ, , е с л и указан

на пр од укте, пр е дупр еж д ает по льзов ател я о наличии
неизолир ованного опасного напр яжения внутр и
кор пуса пр одукта, котор ое может пр ивести к пор ажению
э л е кт р и ч е с ки м т о ко м .

ВНИМАНИЕ: Данный символ, , е сл и указан на пр од укте,

пр едупр е ж дает по льзов ателя о наличии важны х инстр укций
по экспл уатации и об служ ив анию в р уко в о д ств е ,
пр илагаемом к данному об ор удов анию.

Дл я по л учени я инф ор маци и о пр ав ил ах техни ки б езо п асности,
соб людении нор мативны х тр еб ований , электр омагнитной
совместимости (Э М П/Э ДС ), возможности доступа и др угих
вопр осах см. р уководств о по б езопасности и соб людению
нор матив ны х тр еб о в аний Extr on на сай те Extr on: ,

www.extron.com, н о мер по катало гу - 68 -29 0 -01 .

安全说明 • 简体中文

警告： 产品上的这个标志意在警告用户该产品机壳内有暴露的危险 电压，

有触电危险。

注意： 产品上的这个标志意在提示用户设备随附的用户手册中有

重要的操作和维护(维修）说明。

关于我们产品的安全指南、遵循的规范、EMI/EMF 的兼容性、无障碍
使用的特性等相关内容，敬请访问 Extron 网站 , www.extron.com，参见

Extron 安全规范指南，产品编号 68-290-01

。

安全記事 • 繁體中文

警告: 若產品上使用此符 號，是為了提醒使用者，產品機 殼內存在著

可能會導致觸電之風險的未絕緣危險電壓。

注意 若產品上使用此符號，是為了提醒使用者，設備隨附的用戶手冊中有

重 要 的 操 作 和 維 護（ 維 修 ）説 明 。

有關安全性指導方針、法規遵守、EMI/EMF 相容性、存取範圍和相關主題的詳細資
訊，請瀏覽 Extron 網站：www.extron.com，然後參閱《Extron 安全性與法規
遵守手冊》，準則編號 68-290-01。

安全上のご注意 • 日本語

警告: この記号 が製品上に表示されている場合は、筐体内に絶縁されて

いない高電圧が流れ、感電の危険があることを示しています。

注意:この記号 が製品上に表示されている場合は、本機の取扱説明書に

記載されている重要な操作と保守(整 備)の指示についてユーザーの 注意
を喚起するものです。

安全上のご注意、法規厳守、EMI/EMF適合性、その他の関連項目に
つ い て は 、エ クスト ロ ン のウェ ブ サ イト www.extron.com よ り 『 Extron Safety
and Regulatory Compliance Guide』 ( P/N 68-290-01) をご覧ください。

안전 지침 • 한국어

경고: 이 기호 가 제품에 사용될 경우, 제품의 인클로저 내에 있는

접지되지 않은 위험한 전류로 인해 사용자가 감전될 위험이 있음을
경고합니다.

주의: 이 기호 가 제품에 사용될 경우, 장비와 함께 제공된 책자에 나와

있는 주요 운영 및 유지보수(정비) 지침을 경고합니다.

안전 가이드라인, 규제 준수, EMI/EMF 호환성, 접근성, 그리고 관련 항목에
대한 자세한 내용은 Extron 웹 사이트(www.extron.com)의 Extron 안전 및
규제 준수 안내서, 68-290-01 조항을 참조하십시오.

Copyright

© 2011-2018 Extron Electronics. All rights reserved. www.extron.com

Trademarks

All trademarks mentioned in this guide are the properties of their respective owners.
The following registered trademarks (

®

), registered service marks (SM), and trademarks (TM) are the property of RGBSystems, Inc. or

ExtronElectronics (see the current list of trademarks on the Terms of Use page at www.extron.com):

Extron, Cable Cubby, ControlScript, CrossPoint, DTP, eBUS, EDID Manager, EDID Minder, Flat Field, FlexOS, Glitch Free. Global
Configurator, GlobalScripter, GlobalViewer, Hideaway, HyperLane, IPIntercom, IPLink, KeyMinder, LinkLicense, LockIt, MediaLink,
MediaPort, NetPA, PlenumVault, PoleVault, PowerCage, PURE3, Quantum, Show Me, SoundField, SpeedMount, SpeedSwitch,
StudioStation, SystemINTEGRATOR, TeamWork, TouchLink, V-Lock, VideoLounge, VN-Matrix, VoiceLift, WallVault, WindoWall, XTP,
XTPSystems, and ZipClip

(SM)

Registered Service Mark

: S3 Service Support Solutions

AAP, AFL (Accu-RateFrameLock), ADSP(Advanced Digital Sync Processing), Auto-Image, AVEdge, CableCover, CDRS(ClassD
Ripple Suppression), Codec Connect, DDSP(Digital Display Sync Processing), DMI (DynamicMotionInterpolation), DriverConfigurator,
DSPConfigurator, DSVP(Digital Sync Validation Processing), eLink, EQIP, Everlast, FastBite, FOX, FOXBOX, IP Intercom HelpDesk,
MAAP, MicroDigital, Opti-Torque, PendantConnect, ProDSP, QS-FPC(QuickSwitch Front Panel Controller), RoomAgent, Scope-Trigger,
ShareLink, SIS, SimpleInstructionSet, Skew-Free, SpeedNav, Triple-Action Switching, True4K, Vector™ 4K , WebShare, XTRA, and
ZipCaddy

Registered Trademarks (

Trademarks

(™)

®

)

FCC Class A Notice

This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part15 of the FCC rules. The ClassA limits provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause interference. This interference must be corrected at the
expense of the user.

NOTE: For more information on safety guidelines, regulatory compliances, EMI/

VCCI-A Notice

この装置は、クラスＡ情報技術装置です。 この装置を家庭環境で使用すると、電波妨害を引き

起こすことがあります。 その場合には使用者が適切な対策を講ずるよう要求されることがあります。
ＶＣＣI －Ａ

EMF compatibility, accessibility, and related topics, see the Extron Safety and

Regulatory Compliance Guide on the Extron website.

Conventions Used in this Guide

Notifications

The following notifications are used in this guide:

ATTENTION:

• Risk of property damage.

• Risque de dommages matériels.

NOTE: A note draws attention to important information.

Software Commands

Commands are written in the fonts shown here:

^AR Merge Scene,,0p1 scene 1,1 ^B 51 ^W^C.0
[01] R 0004 00300 00400 00800 00600 [02] 35 [17] [03]

E X! *X1&* X2)* X2#* X2! CE}

NOTE: For commands and examples of computer or device responses used in

Computer responses and directory paths that do not have variables are written in the
font shown here:

Reply from 208.132.180.48: bytes=32 times=2ms TTL=32
C:\Program Files\Extron

Variables are written in slanted form as shown here:

ping xxx.xxx.xxx.xxx —t
SOH R Data STX Command ETB ETX

Selectable items, such as menu names, menu options, buttons, tabs, and field names
are written in the font shown here:

From the File menu, select New.
Click the OK button.

this guide, the character “0” is used for the number zero and “O” is the capital
letter “o.”

Specifications Availability

Product specifications are available on the Extron website, www.extron.com.

Extron Glossary of Terms

A glossary of terms is available at http://www.extron.com/technology/glossary.aspx.

Contents

Introduction ...............................................1

About This Guide ................................................. 1

MVC121Plus Description ................................... 1

MVC121Plus Features ....................................... 1

MVC121Plus Application Diagram ..................... 2

Installation ................................................. 3

Rear Panel Features ............................................ 3

Front Panel Features ............................................ 7

Operation ................................................. 10

MVC121Plus Operation ................................... 10

Front Panel Operation ........................................ 11

Rear Panel Operation ........................................ 11

Power Cycle ...................................................... 12

Firmware Updates ............................................. 12

Reset Actuator and LED .................................... 12

Digital Input Port ................................................ 13

DSP Processing and Signal Flow ....................... 15

Mic/Line Input Signal Chain ............................... 16

Filter Processor Block ........................................ 17

Filter .................................................................. 18

Mixer ................................................................. 22

Output Channels ............................................... 26

Volume .......................................................... 26

Gain .............................................................. 27

SIS Programming and Control .................28

Connection Options ........................................... 28

USB Port Details: ........................................... 28

MVC121Plus-initiated Messages ................. 29

Using the Command/Response Tables .......... 29

Error Responses ............................................ 30

Command/Response Table for Basic SIS

Commands ...................................................... 31

Symbol Definitions ......................................... 31

Command/Response Table for Basic

MVC121Plus SIS Commands ..................... 32

Command/Response Tables for DSP SIS

Commands ...................................................... 35

OID ................................................................ 35

Error Responses ............................................ 36

Symbol Definitions ......................................... 36

Command/Response Table for

MVC121Plus DSP SIS Commands ............. 37

Software Control ...................................... 39

Software Control................................................ 39

Windows-based Program Control ...................... 39

Installing the DSP Configurator Program ........ 40

Install the USB Driver ..................................... 41

DSP Configurator Program ................................ 42

Using the Program ......................................... 43

Help .............................................................. 43

Emulate Mode vs. Live Mode ......................... 44

Synchronizing: Pull vs. Push .......................... 44

Selecting Live Mode and Pushing or

Pulling a Configuration .................................. 45

Reference ................................................48

Mounting ........................................................... 48

Tabletop Use ................................................. 48

UL Rack Mounting Guidelines ........................ 48

Rack Mounting .............................................. 49

Furniture Mounting......................................... 49

Firmware Loader ............................................... 50

MVC121Plus Hardware Reset Modes .............. 51

viiMVS 121 Plus • Contents

MVS 121 Plus • Contents viii

Introduction

This section describes this manual and the MVC121Plus, including:

• About This Guide • MVC121Plus Features

• MVC121Plus Description • MVC121Plus Application Diagram

About This Guide

This guide contains information about the Extron MVC121Plus audio mixer and volume
controller with DSP. Unless otherwise specified, references in this guide to the “mixer” or
“MVC” relate to the features or operation of the MVC121Plus.

MVC121Plus Description

The MVC121Plus is an audio mixer and volume controller that will mix up to two
mic/line inputs (mono, balanced or unbalanced) with one line level input (stereo, balanced,
or unbalanced). All audio input signals are converted from analog to digital prior to
processing or routing. Each mic input and the stereo line level input have their own gain
control adjustment screws, and the mixed output also features a volume control knob.

The MVC offers gain, Parametric EQ filter, and tone processing with quick and intuitive
configuration using the DSP Configurator software. The DSP built into the MVC provides
wide dynamic range and utilizes 24-bit audio converters with 48 kHz sampling to maintain
audio signal transparency.

Two sets of outputs include a fixed output that is independent from volume control, and
a variable output that is volume adjustable. All inputs and outputs are via 3.5 mm captive
screw connectors, and the gain/volume settings are indicated by an eight segment LED
ladder.

Rotating the gain adjustment screw clockwise increases gain, rotating the screw
counterclockwise decreases gain. Gain values adjust in 1dB increments.

Volume adjustment interval varies with knob rotation, that is, turning the knob clockwise
increases the volume and turning the knob counterclockwise decreases the volume. The
volume is increased more rapidly at lower volume settings.

The MVC offers RS-232 control of input gain/attenuation, and control of output volume. The
latest firmware can be uploaded using RS-232 or USB and the Extron Firmware Loader
program for Windows®.

MVC121Plus Features

Emulate and live modes for configuration — The DSP Configurator control program can
be used in emulate mode to create an MVC121Plus configuration offline. The modifications
can be saved and applied to the unit when a connection is established. In live mode, the
changes are made directly to the unit.

Two mic/line inputs and one line level input — Two mic/line (mono, balanced or
unbalanced) inputs can mix with one line level (stereo, balanced or unbalanced) input.

MVC 121 Plus • Introduction 1

Fixed and variable outputs — The MVC includes a fixed output and a volume adjustable

variable output.

Multi-function LED level indicator — Automatically displays the mix-point gain or output
volume setting for the front panel controls, and also functions as an output level meter.

Fixed, low latency DSP processing — Input to output latency within the MVC121Plus
is fixed regardless of the number of active channels or processes. Fixed, low latency
processing keeps audio in sync with video, and prevents distractions to the presenter
resulting from delayed live audio.

48-volt phantom power for condenser microphones — 48 VDC phantom power is
available for mic inputs 1 and 2.

Soft limits provide optimal adjustment range — The volume range for the variable
output and the gain range for the three mix points can be limited using the soft limits to
maintain optimal minimum and maximum levels when using external control. This prevents
operators from over or under-adjusting levels when using digital I/O or RS-232 control. The
DSP Configurator software provides quick drag-and-drop adjustment of soft limits.

SpeedNav™ keyboard navigation — SpeedNav enables user-friendly, keyboard-based
navigation of the DSP Configurator software without the need for a mouse or touchpad.
Using keyboard navigation keys and shortcuts, the user can access any input or output,
mix-points, and all audio DSP tools. Using only the keyboard for software access can help
expedite audio system setup and commissioning.

Rear panel RS-232 control port — The MVC121Plus can be configured using Extron
Simple Instruction Set (SIS™) commands from a PC using an RS-232 cable.

Front panel USB control port — The MVC121Plus can be configured by Extron Simple
Instruction Set (SIS) commands from a PC using a USB cable.

MVC121Plus Application Diagram

Extron
IN1508

Scaling Presentation
Switcher

4 5

3

AUDIO INPUT

2

1

L

OUTPUT

R

RGB

LISTED
1T23

U S

I.T.E.

Y, B-Y, R-Y

C

6

8

DVI

RGB

7

RGB

3

YC

R-Y

1

VID

5

B-Y

I

Y

N

VID

100-240V 50-60Hz

4

P

U

2

T

PC

Laptop

PC

Desk Microphone

RS-232

OUTPUT

A

R

B

L

L

6

R

8

7

Extron
MVC 121 Plus

Three Input Stereo
Mixer with DSP

Extron
XPA 2001-70V

Power
Amplier

O

VARIABLE

U

L

T

R

P
U

LINE 3

T

L

I

S

FIXEDL R

N

MIC

P

+48V

U
T

1

POWER

S

1 2MIC/LINE

2

12V

0.3A MAX

PC Podcasting/
Recording Station

XPA 2001-70V

OUTPUT

70 V

CLASS 2 WIRING

REMOTE

50 mA10V

VOL/MUTE

INPUTS

R

HPF

STANDBY

(MONO)

L

80 Hz

LEVEL

17TT
AUDIO/VIDEO

OFF

APPARATUS

C US

0

LISTED

LIMITER/
PROTECT
SIGNAL

100-240V 1.3A, 50-60Hz

MVC 121 Plus

MIXER/VOLUME
CONTROLLER

3

21

R

Rx

Tx

DIGI IN

RS-232

®

100

RELAY

LINK

ACT

3

INPUT

1

IR

3

1

4

3

COM

2

RX

1

4

TX

2

IPL 250

1

4

2

2

R

3

TCP/IP

Extron
SI 26CT

Two-way Ceiling
Speakers

ON

OFF

DISPLAY
MUTE

SCREEN
UP

SCREEN
DOWN

TouchLink

Control
System

VCR

DVD

DOC
CAM

LAPTOP

PC

™

Figure 1. MVC121Plus Application Diagram

MVC 121 Plus • Introduction 2

Installation

59

POWER

12V

0.4A MA

A

(12 VDC, 0.5 A max.)

This section describes the features and connectors for the MVC121Plus:

• Rear Panel Features • Front Panel Features

Rear Panel Features

4

45

9

INPUTS OUTPUTS

POWER

12V

0.3A MAX

MIC

+48V

1

2

LINE 3

L

12MIC/LINE

R

1122336

VARIABLE

FIXEDLR

67

RL

RS-232

Tx Rx 1 2 3

788

MVC 121 Plus

RESET

DIGI IN

Figure 2. MVC121Plus Rear Panel

POWER connector — Connect the two pole, 3.5 mm captive screw connector from

1

the 12 VDC external power supply (provided) to this socket on the rear panel. Ensure
the connections have the correct polarity as shown in the illustration below:

X

DC Power
Input

DC Power Cord
Captive Screw Connector

Ground

G

+12 VDC input

Ground all

Devices

RidgesSmooth

AA

SECTION A–

Power Supply

Output Cord

External Power Supply

Figure 3. Power Supply Connection

ATTENTION:

• Always use a power supply supplied or specified by Extron. Use of an

• Utilisez toujours une source d’alimentation fournie ou recommandée par

unauthorized power supply voids all regulatory compliance certification and
may cause damage to the supply and the end product.

Extron. L’utilisation d’une source d’alimentation non autorisée annule toute
certification de conformité réglementaire, et peut endommager la source
d’alimentation et l’unité.

MVC 121 Plus • Installation 3

ATTENTION:

C

• Unless otherwise stated, the AC/DC adapters are not suitable for use in air

handling spaces or in wall cavities. The power supply is to be located within the
same vicinity as the Extron AV processing equipment in an ordinary location,
Pollution Degree 2, secured to the equipment rack within the dedicated closet,
podium or desk. Power over Ethernet (PoE) is intended for indoors use only. No
part of the network that uses PoE can be routed outdoors.

• Sauf mention contraire, les adaptateurs CA/CC ne conviennent pas à une

utilisation dans les espaces d’aération ou dans les cavités murales. La source
d’alimentation doit être placée à proximité de l’équipement Extron dans
un emplacement ordinaire soumis à un degré de pollution de catégorie II,
solidement fixé au rack d’équipement d’une baie technique, d’un pupitre, ou
d’un bureau. L’alimentation via Ethernet (PoE) est destinée à une utilisation en
intérieur uniquement. Elle doit être connectée seulement à des réseaux ou des
circuits qui ne sont pas routés au réseau ou au bâtiment extérieur.

• The installation must always be in accordance with the applicable provisions of

National Electrical Code ANSI/NFPA 70, article 725 and the Canadian Electrical
Code part 1, section 16. The power supply shall not be permanently fixed to
building structure or similar structure.

• Cette installation doit toujours être conforme aux dispositions applicables

du Code américain de l’électricité (National Electrical Code) ANSI/NFPA 70,
article 725, et du Code canadien de l’électricité, partie1, section16. La source
d’alimentation ne devra pas être fixée de façon permanente à la structure de
bâtiment ou à d’autres structures similaires.

NOTE: The length of the exposed wires in the stripping process is critical. The

ideal length is 3/16 inches (5 mm). Any longer and the exposed wires may touch,
causing a short circuit between them. Any shorter and the wires can be easily
pulled out even if tightly fastened by the captive screws.

Do not tin the wires. Tinned wire does not hold its shape and can become loose
over time.

MIC 1 and 2 +48 V phantom power LED indicators — The LED lights whenever the

2

corresponding mic phantom power is on and goes off when the phantom power is off.

MIC/LINE inputs 1 and 2 — Up to two mono microphones or line level signals,

3

balanced and/or unbalanced, may be connected to the 6-pole 3.5 mm captive screw
connector. Inputs provide gain settings to accommodate consumer and pro operating
line level sources, with sufficient gain to support mic level audio.

12MIC/LINE

NOTE: Mic inputs will be evenly

mixed into both left and right
outputs.

Jumper

Balanced MIC Unbalanced MI

Figure 4. MIC/LINE Inputs

MVC 121 Plus • Installation 4

Line input 3, left (L) and right (R) — A line level audio source, such as a CD player,

DVD

CSR 6 RCA Adapter

MAIN 3

LR

MVC 121 MAIN wiring.eps

LR

Slee

4

output from a switcher, DVD player, or other audio device, may be connected to
the 5-pole 3.5 mm captive screw connector. Line inputs provide gain settings to
accommodate consumer and pro operating line level sources. Balanced or unbalanced
stereo connections can be wired to this connector (see the following example diagram).

NOTE: Input devices cabled with two RCA male outputs may be connected to the

5-pole 3.5 mm captive screw connector using the Extron CSR 6 adapter.

Figure 5. Input Devices Cabled with Two RCA Male Outputs

To wire the captive screw connectors to the RCA or 3.5 mm mini phone plugs, see the
following illustrations.

Tip (L)

Audio RCA connector color.eps

Ring (R)

Tip (Signal)

Sleeve (Gnd )

Ring

Ring

Tip

ves
Tip

Right Channel
(Red Jacket)

Left Channel
(White Jacket)

Do not tin the wires!

LR

Sleeve ( )

3.5 mm TRS Connector

Tip

Sleeve

Tip

Sleeve

Unbalanced audioBalanced audio

Figure 6. Wiring Captive Screw Connectors

Variable output left (L) and right (R) — The balanced/unbalanced stereo output

5

to an amplifier from the 5-pole 3.5 mm captive screw connector is controlled by the
large main volume control knob on the front panel (see Front Panel Features on
page7). Volume range is from 0 to 100%, or -100 to 0dB.
Adjust the speaker volume by using the following sequence:

1. Adjust the volume of the amplifier down to its minimum setting.

2. Adjust the main volume knob of the MVC to its default level of 100% volume, or

0dB.

3. Adjust the volume of the amplifier to the desired level.

4. Make subsequent volume level adjustments by using the volume knob of the MVC.

NOTE: Output devices cabled with two RCA male outputs may be connected to the

5-pole 3.5 mm captive screw connector using the Extron CSR 6 adapter.

MVC 121 Plus • Installation 5

Sound System

CSR 6 RCA Adapter

VARIABLE

LR

Right

Ground (Gnd,

Tx

Rx 123

Tip

NO GROUND HERE.

Sleeve(s)

Tip

NO GROUND HERE.

Unbalanced Stereo Output

CAUTION

For unbalanced audio, connect the sleeve(s)
to the center contact ground. DO NOT connect
the sleeve(s) to the negative (-) contacts.

LR

Left

Right

Tip

Ring

Sleeve(s)

Tip

Ring

Balanced Stereo Output

LR

Left

ATTENTION:

• Connect the sleeve to ground. Connecting the sleeve to a negative ( –) terminal

will damage the audio output circuits.

• Connectez le manchon à la borne de terre (Gnd). Connecter le manchon à une

borne négative(-) endommagera les circuits de la sortie audio.

Figure 7. Output Devices Cabled with Two RCA Male Outputs

Fixed output left (L) and right (R) — The balanced/unbalanced stereo output from

6

the 5-pole 3.5 mm captive screw connector is output at a fixed volume adjustable gain
level for input to a recording device. Level can be adjusted at the recording device, or
using output gain control with a range of -24 to +12dB.

NOTE: The main volume control knob on the front panel operates independently of

the fixed output. Both the fixed and variable output connectors will output audio
simultaneously.

The fixed output connector is wired the same as the variable output connector. See 5,
variable output connector, for an example application diagram with cabling instructions
and a caution.

RS-232 — Connect an RS-232 device (control system or PC) to the 6-pole 3.5 mm

7

captive screw connector for two-way RS-232 communication. Software for
RS-232 control is included with the MVC. See SIS Programming and Control (see
page28) for information on how to install and use the control software and SIS
commands.

Transmit (Tx)
Receive (Rx)

)

RS-232

DIGI IN

Figure 8. RS-232

Digital input (DIGI IN) — A 6-pole 3.5 mm captive screw connector provides three

8

configurable ports designed to connect to various devices such as motion detectors,
alarms, buttons, photo (light) sensors, temperature sensors, or other devices. This
connector shares a common ground with the RS-232 connector (g). The wiring
diagram is shown below.

MVC 121 Plus • Installation 6

21

Tx

Rx

3

Figure 9. Digital Input Wiring Diagram

RS-232

DIGI IN

Both the RS-232 and the digital input connectors may be used simultaneously by using
a 6-pin captive screw connector with two wires sharing the same ground connector
(see the diagram below).

Reset — The recessed reset button is used to access various modes of resets. The

9

green power LED on the front panel indicates what mode of reset was accessed (see
the MVC121Plus Hardware Reset Modes (see page51) section for additional
details).

Front Panel Features

Do not tin the wires!

Tx Rx 1 2 3

RS-232

_

DIGI IN

1
2
3

VOLUME

MIX

321

CONFIG

11223344556677

21 3 4 5 6

MICMIC LINE

MVC 121 Plus

MIXER/VOLUME CONTROLLER

7

Figure 10. MVC121Plus Front Panel

Power/Reset LED — Green power indicator lights when the MVC121Plus is

1

operational. The LED also blinks per mode reset (see Reset Actuator and LED on
page12).

Configuration (Config) port — Connect a PC to the USB mini B-type connector for

2

configuring the MVC using the DSP Configurator software. The MVC121Plus USB
driver must be installed prior to using the port.

Mic 1 gain control — Rotating the encoder screw clockwise increases the gain

3

setting, rotating the encoder screw counterclockwise decreases the gain. This
adjustment controls the single gain point in the mix matrix that mixes mono mic 1 levels
to the stereo output bus.

The gain adjustment is indicated by the LED indicator bar (6). When the encoder
screw rotation has stopped for three seconds or longer, the LED indicator returns to the
output meter indication.

MVC 121 Plus • Installation 7

Mic 2 gain control (see figure10 on the previous page)— Rotating the encoder screw

4

clockwise increases the gain setting, rotating the encoder screw counterclockwise
decreases the gain setting. This adjustment controls the single gain point in the mix
matrix that mixes mono mic 2 levels to the stereo output bus.

The gain adjustment is indicated by the LED indicator bar (6). When the encoder
screw rotation has stopped for three seconds or longer, the LED indicator returns to the
output meter indication.

Line level 3 gain control — Rotating the encoder screw clockwise increases the gain

5

setting, rotating the encoder screw counterclockwise decreases the gain setting. This
adjustment controls the single gain point in the mix matrix that mixes stereo line level
input 3 to the stereo output bus.

The gain adjustment is indicated by the LED indicator bar (f). When the encoder screw
rotation has stopped for three seconds or longer, the LED indicator returns to the output
meter indication.

LED ladder indicator bar — As the mix-point gain or output volume increases or

6

decreases via the front panel controls, the LED indicator bar lights from the bottom to
the top to indicate the current mix-point or volume level, as shown in the table below.
As the volume is increased or decreased within a volume range, the top LED to be lit
flashes once. If the knob is turned past maximum volume, all 8 LEDs flash for as long as
the knob continues to be turned.

When the output volume is muted, the individual LEDs scroll from the top to the bottom
to indicate a muted state. The LEDs return to being a meter for the output signal when
the audio is unmuted. Unmute occurs when the mute process is reversed, or when an
encoder screw or the volume knob position is changed. All LEDs blink when the user
attempts to adjust the encoder position beyond the maximum gain level.

When no activity is detected for either the mix-point encoder screws or the volume
adjust knob, the LED indicator bar will reflect a combined L/R output meter level, where
the max level of either left or right meter is always displayed, as shown in the table
below.

NOTE: Mix-point or volume level is only displayed on the LED ladder indicator

whenever the front panel encoder screws or the volume adjustment knob are being
adjusted and not through DSP Configurator software or SIS commands.

LED Level Meter Display

(dB)

8 -6 to 0

7 -12 to -7
6 -18 to -13
5 -24 to -19
4 -30 to -25
3 -36 to -31
2 -42 to -37
1 -60 to -43

MVC 121 Plus • Installation 8

Volume level adjust knob — Rotating the adjustment knob

MIXER/VOLUME CONTROLLER

7

clockwise increases the output volume, rotating the knob
counterclockwise decreases the volume. The LEDs light from
bottom up as the volume level increases.

Use the rotary encoder to adjust the output volume from
0 (-100dB) to 100% (0dB). The default setting is 100% (0dB).
The knob step adjustments are as follows:

VOLUME

MVC 121 Plus

Volume

Range (dB)

Knob Step

Adjustment (dB)

-100 to -70 +/- 5dB

-70 to -30 +/- 3dB

-30 to -20 +/- 2dB

-20 to -0 +/- 1dB

The degree to which the volume is incremented or decremented for each step the
volume adjust knob is turned, depends on the current volume setting.

As the volume increases or decreases, the LED bar lights to indicate the current volume
range, as shown in the table below. As the volume is increased or decreased within a
volume range, the top LED to be lit flashes once. If the knob is turned past maximum
volume, all 8 LEDs flash, for as long as the knob continues to be turned.

In the table below, turning the volume adjust knob (7) affects the volume range and
turning the input gain control screws (3, 4, 5 affects the mix-point range).

LED

Level

Volume Range

(dB)

Mix-point

Range (dB)

8 -4 to -0 +7 to +12
7 -9 to -5 +1 to +6
6 -14 to -10 -3 to +0
5 -19 to -15 -7 to -4
4 -29 to -20 -11 to -8
3 -49 to -30 -15 to -12
2 -69 to -50 -19 to -16
1 -99 to -70 -23 to -20

MVC 121 Plus • Installation 9

Operation

This section describes the operation of the MVC121Plus, including:

• MVC121Plus Operation • Mic/Line Input Signal Chain

• DSP Processing/Signal Flow • Mixer

• Filter Processor Block • Output Channels

MVC121Plus Operation

The MVC121Plus can be configured using a PC running Windows XP or better and the
DSPConfigurator software (available on the included disc or at www.extron.com), or the
Extron SISSimple Instruction Set using HyperTerminal or DataViewer.

The MVC121Plus is configured for immediate operation, with all inputs mixed to the
outputs. However, input gain must be set, especially for the microphone inputs, before the
device will function at optimal levels.

The front panel small rotary encoders control level at the mix-points, not at the input gain
stage. Mix-points have a gain range of −24dB to +12dB. In some instances, the mix-point
gain range may be too great, allowing for settings that are too loud or too soft, and in some
instances the loudest settings may cause feedback or clipping. Soft limits can be applied to
the mix-point gain ranges, limiting the gain range for smoother operation.

Mix-point levels and Variable output levels may be set using the front panel rotary controls.
Input gain should be set using the DSP Configurator software, which provides metering in
dBFS that will assist you in configuring the device for optimal operation. The MVC121Plus
is a digital device, therefore optimal operating levels are close to 0dBFS without ever going
over 0dBFS (0dB “full scale” on the input or output meters). Levels above 0dBFS cause
clipping, which is always audible on a digital device.

Soft limits may also be applied to the Variable output, which will prevent the volume from
becoming too loud or too soft. The Fixed output, while not affected by the front panel
Volume control, does include a gain stage that is configured with the DSP Configurator
software. The Fixed output gain setting can be used to optimize the level going to, for
example, a recording device or ALS system.

Lastly, the input signal chain provides a Filter/EQ block. Use these processors to optimize
the tonal quality of your source devices. A high-pass filter applied to a microphone will
reduce thumps and pops, while the parametric EQ can be used to give a talker more
presence, or to remove frequencies that are likely to cause feedback.

MVC 121 Plus • Operation 10

Front Panel Operation

11223344556677

59

CONFIG

MIX

MICMIC LINE

VOLUME

321

MVC 121 Plus

MIXER/VOLUME CONTROLLER

Rear Panel Operation

21 3 4 5 6

7

Figure 11. MVC121Plus Front Panel

Power/Reset LED — Green power indicator lights solid when the MVC is operational.

1

The LED will blink when the reset button is pressed.

Configuration connector — The USB 2.0 port uses a mini type-B connector to

2

connect to a host computer for control. The MVC121Plus USB driver must be installed
prior to using the port (see the Install the USB Driver on page41 for additional
information).

The MVC appears as a USB peripheral with bidirectional communication. The USB
connection can be used for software operation (see Windows-based Program

Control on page39), and SIS control (see Software Control on page39 for

additional information).

4

POWER

12V

0.3A MAX

45

INPUTS OUTPUTS

MIC

+48V

1

2

LINE 3

L

12MIC/LINE

R

VARIABLE

FIXEDLR

RL

9

MVC 121 Plus

RESET

RS-232

DIGI IN

Tx Rx 1 2 3

1122336

Figure 12. MVC121Plus Rear Panel

1 2 3 4 5 6 7 8

further details.

Reset — The reset actuator initiates system resets (see Reset Actuator and LED on

9

page12 for additional information).

67

788

—See Rear Panel Features starting on page3 section for

MVC 121 Plus • Operation 11

Power Cycle

Current mixing and audio processor settings, the current state of the device, are saved in
nonvolatile memory. When the unit is powered off, all settings are retained. When the unit
is powered back on, it recalls settings from the nonvolatile memory. If a configuration was
in process during the power down, these saved mix, audio level, and audio DSP processor
settings become active.

On power up the front power indicator LED lights solid when the unit is available for
operation or programming.

Firmware Updates

The firmware of the MVC121Plus can be updated through USB or RS-232 connection.
The user can obtain new firmware from the Extron website. After obtaining the new
firmware, upload it to the unit by launching Firmware Loader from the DSPConfigurator
program (see Software Control on page39), or using the Extron standalone Firmware
Loader software application available on the included disc or at www.extron.com.

Reset Actuator and LED

A recessed button on the rear panel initiates two reset modes. The green front panel LED
(figure11, 2 on the previous page) blinks to indicate the reset modes as described in the
following section. See the previous front and rear panel diagrams.

Hardware Reset Modes:

With power on, when the reset button is held down the front and rear panel LEDs will pulse
(blink) every three seconds and put the unit in a different reset mode. The MVC121Plus will
default back to the base firmware that shipped with the unit from the factory allowing the
user to recover a unit that has incorrect code or updated firmware running.

NOTE: Control software may not function correctly if using an earlier firmware version.

MODE 1 — Firmware reset: Disconnect power to the MVC121Plus. Press and hold
the reset button while applying power to return the firmware to the version shipped with the
unit from the factory. This allows recovering a unit with incorrect or corrupt firmware.

All user files and settings are maintained.

MODE 5 — Factory default reset: With power on, press and hold the reset button until
the reset LED blinks 3 times (~9 seconds). Each flash will last for 0.25 seconds. Release
then momentarily (<1 second) press the reset button to return the MVC to factory default
conditions. If the second momentary press does not occur within 1 second, the reset is
exited.

The default (reset) state of the device is:

• Inputs 1 – 3 are mixed to fixed and variable outputs (set to 0dB gain).

• All outputs are active (unmuted, 100% volume or 0dB gain).

• DSP (Filter) is inactive.

• All audio inputs are active (0dB gain and unmuted).

MVC 121 Plus • Operation 12

Digital Input Port

The three-pin digital input port (Digi In) is used to monitor or drive TTL level digital signals.
The port consists of three input pins with the fourth pin being used as a ground providing
three inputs total. The DSP Configurator software provides a selection of functions from a
list, to be loaded to the MVC121Plus.

1. From the main structure menu, click Tools > Configure Digital Inputs to

NOTE: The digital input connectors are used to mute or unmute the input signal using a

contact closure device. SIS programming commands cannot mute or unmute the input
signal while the digital input ports are connected. The digital input ports are “off” and
not configured by default.

access the Config utility.

Figure 13. Access to Configure Digital Inputs

2. Select the digital input to configure.

Figure 14. Configure Digital Inputs Dialog Box

MVC 121 Plus • Operation 13

3. Select the event or ‘trigger’ to configure the input.

Figure 15. Select Trigger Type

4. The Fixed functionality of the digital input is set to Mute/Unmute by default.

Figure 16. Fixed functionality Option

5. The Fixed target mix-point is set to the selected digital input by default.

Figure 17. Fixed target Option

6. Click Apply to accept the changes.

MVC 121 Plus • Operation 14

DSP Processing and Signal Flow

The diagram below shows the input signal flow and DSP processing per signal chain.
Signal chains and mix-points are described in the following sections.

Figure 18. DSP Processing per Signal Chain

All signal routing, processing, and level control (gain/volume), are accomplished using
software control from a PC connected to the MVC121Plus via the USB configuration port
or the RS-232 port. The DSP Configurator program provides complete control while the SIS
commands provide more limited control.

This section describes the signal processing including parameter ranges, and how to
mix inputs and outputs using the DSP Configurator control program. To install the DSP
Configurator program, see Software Control on page39.

MVC 121 Plus • Operation 15

Mic/Line Input Signal Chain

Figure 19. Input Signal Chain

Input signal chain GUI elements from left to right are as follows:

Mic/line inputs 1 and 2

• Gain (GAIN) — Mono gain control with a range from -18 to +60dB includes a mute

button. Step resolution is 0.1dB. A polarity switch (+ or -) is provided. Gain control is
provided pre-meter and mute control is provided pre-meter.

Figure 20. Fader Handle

Clicking the fader handle or clicking within the fader area brings focus to the fader. The
input signal level can be adjusted using any of the following methods:

• Direct adjustment. Click and hold the fader handle, then drag it to the desired level

in 0.1dB steps.

• Click or tab to the fader handle, then <up arrow> or <down arrow> to the desired

level in 1dB steps. Page Up and Page Down increases or decreases level in 10dB
steps.

• Click in or tab to the signal level readout field. Type a new value, then press <Enter>

or <Tab> to another area.

• Filter (FILT) – Up to five filters per input can be inserted in any combination of High

Pass, Low Pass, Bass & Treble shelving (tone), or Parametric Equalizer.

MVC 121 Plus • Operation 16

Line input 3

• Gain (GAIN) — Stereo (left/right) gain control with a range from -18 to +24dB includes

mute buttons. Step resolution is 0.1dB. Left and right polarity switches
(+ or -) are provided. Gain control is provided pre-meter and mute control is provided
pre-meter. A Gang switch ties the two input levels together.

Figure 21. Stereo Line Gain

• Filter (FILT) — Up to three filters can be inserted in any combination of High Pass, Low

Pass, Bass & Treble shelving (tone), or Parametric Equalizer.

Filter Processor Block

A filter block can be configured for each MVC input. The following functions are available:

• Insert — The filter block is inserted and made active by right-clicking on the block

and selecting from the context menu or by double-clicking and entering selections.

• Remove a filter — An active filter can be removed by right-clicking on the

block and selecting Delete or by selecting the block and pressing <delete> on the
keyboard. This sets the parameters back to default and bypasses the block.

• Bypass — When bypass is active, signal flow passes through the

filter block without filter processing, regardless of the settings.
When bypass is removed, the signal will be processed according
to the filter settings. A red mark appears in the lower left of the
block (shown on the right) to indicate it has been inserted, but is
currently bypassed.

MVC 121 Plus • Operation 17

Filter

MIc/line inputs 1 and 2 allow a total of five filters per input. Line input 3 allows up to three
filters.

Figure 22. Filter Inputs

The first filter is inserted from a processor list that appears when the block is double-clicked
or via a context window/processor list when the block is right-clicked. After the processor is
inserted, a double-click opens the setup dialog box.

Figure 23. Filter Block Dialog Box

Additional filters are inserted by opening the filter block dialog box, then selecting a filter
type from the drop-down filter selection list. All filter parameters are modified via the Filter
block dialog box. Each filter loads with all applicable default parameters displayed to the
right of each drop-down filter selection list.

MVC 121 Plus • Operation 18

Figure 24. Filter Dialog Box, Filters Added

Within the dialog box, a filter is focused when a filter type is inserted, or is focused by
clicking the filter number to the left of the filter selection drop-down list.

Note how filter 3 in the figure below is highlighted in yellow, indicating it is the filter in focus.
The results of the filter in focus (independent of other filters) will show in the graph as a
dotted line the same color as its filter row when bypassed. When active (not bypassed), the
line is solid.

Figure 25. Filter Dialog Box, Filter Not Bypassed

When multiple filters are enabled, the graph indicates the focused filter result (independent
of other filters) in the color of the filter row in the type/parameters table. The composite
response of all filters is displayed in red.

Above the graph, each filter has a “handle” (circled in red above) placed directly above the
cutoff or center frequency whose number corresponds to the filter number (outlined in red).
Clicking a handle or clicking the table row brings focus to that filter. Click+hold+dragging
the handle horizontally changes the cutoff or center frequency to a new position on the x
axis.

MVC 121 Plus • Operation 19

Parametric (Equalizer)

Up to three parametric filters can be placed in the filter box at one time. Each may be set
to a different frequency creating a 3 band parametric equalizer. The control will boost or
cut the center frequency, and by changing the Q value, the range of affected frequencies
can be widened or narrowed around the center frequency. In general, the higher the Q, the
narrower the affected bandwidth.

To demonstrate how Q affects the filter, see the following filter block below containing three
parametric filters centered at different frequencies but with the same Q of 1.0. The filter in
focus (b) has a center frequency of 1000 Hz boosting that frequency +12dB over a Q of

1.0. Note the markers on either side of the peak frequency are at 200 Hz on the left and

5000 Hz on the right, a bandwidth of about 4800 Hz.

Figure 26. Parametric Filter Dialog Box, 1000 Hz

The above dialog box shows the frequency curve for the single active filter. To add its effect
to the overall frequency response, remove the bypass on the other filters.

Figure 27. All Parametric Filters Active

The overall frequency response is now shown above as a solid red line with the filter in
focus, located in row 2, shown in the color of its table row.

The parametric filter allows frequency selection accurate to 0.1 Hz and either 6 or 12dB of
slope. Notice at the specified frequency (100 Hz) the signal is 3dB down, typical operation
for high pass filters. The 3dB down point will remain constant regardless of the slope
setting. Only the steepness of the frequency attenuation curve will change.

MVC 121 Plus • Operation 20

Low Pass

The low pass filter is the opposite of the High Pass filter. All frequencies above the specified
frequency are attenuated allowing lower frequencies to pass.

Figure 28. Low Pass Filter Response Curve

Here, the frequencies higher than the specified frequency, 10 kHz, are attenuated leaving
the lower frequency response flat.

Bass and Treble Shelving

Bass and treble shelving may be added to the filter. Adding this filter automatically inserts
both a bass and treble control row in the dialog box. If only a bass or only a treble filter is
required, either bypass the unneeded control or set it to “unused” in the selection box.

Figure 29. Bass and Treble Shelving

The corner frequency of the controls may be selected to 0.1 Hz accuracy. Two slopes, 6
and 12dB/octave are available along with the ability to boost or cut the signal up to 24dB.

MVC 121 Plus • Operation 21

Mixer

The DSP architecture contains a mixer that connects the mic/line and line inputs to the line
outputs. The DSP Configurator GUI provides control of the mixer, used to set mix levels from
the post processing inputs to the stereo line output bus. Each of the inputs is connected
to a mix-point and output to the stereo output bus. In general, mix levels are set relative to
each other, achieving a desired blend of input signals at an optimal output level, close to,
but not exceeding 0dBFS at the line output Volume block level meter.

Shown below is a view of the MVC121Plus represented in DSPConfigurator, with a red
box indicating the mixer.

From the mixer, any or all three inputs may be routed to the output bus.

Figure 30. Mixer (outlined in red)

Clicking a mix-point brings focus to that mix-point. Double-clicking a mix-point opens a
configuration dialog window with the following components:

• Mono Fader — Sets mix level to the output bus. Gain range is -24dB to +12dB.

Fader behavior is identical to the input channel gain block described in the mic/line input
section with the exception that coarse adjustment (<Page Up> or
<Page Down>) increases/decreases in 5dB increments.

• Mute — Two buttons mute and unmute the left or right signal to the output bus.

• Gang — Ties the two output bus signals together so that pressing either Mute button

mutes or unmutes both outputs.

• OK/Cancel — Click OK to accept changes and close the window. Cancel ignores

changes and closes the window.

The title above the fader reflects the output channel name for the mix-point.

MVC 121 Plus • Operation 22

Mix-point GUI behavior

No mix information — A faint gray ball behind the mix-point indicates it is
muted (contains no mix information).

Mix information — A solid teal-colored “bubble” indicates the mix-point
is unmuted.

Mouse-over — The cursor changes to a hand when a mouse-over occurs
at a mix-point whether the mix-point contains mix information or not.

Single-click — A single click brings focus, indicated by a dark green
circle around either the ball or bubble, depending on mix status.

Double-click — Double-click to open the mix-point dialog box. The
focus circle turns light green in color to indicate the open dialog box. If the
mix-point is muted, the mix-point bubble will be gray. If unmuted, the
bubble will be teal.

Mute — Muting or unmuting the left or right mute boxes of the mix-point dialog box
will mute or unmute the corresponding output channel (L or R) as shown below. The
corresponding half of the teal mix point ball will either be shaded (unmuted) or unshaded
(muted).

Figure 31. Mute Setting

MVC 121 Plus • Operation 23

Multiple open dialog boxes — When multiple mix-point dialog boxes are open (see
the diagram below), the mix-point for the most recently opened dialog box receives the light
green focus circle, while previously opened dialog boxes relinquish their focus. Focus can
be returned by either clicking on a previously opened dialog box, or by double-clicking on a
mix-point.

Figure 32. Multiple Opened Dialog Boxes

In the example below, input audio from Mic/Line Input #1 is processed then arrives at the
mix-point and is routed to the stereo output bus.

Figure 33. Input 1 to Mix-point

A double-click on the mix-point opens the dialog box, as shown on the right of the above
diagram. When the mute button is released on Input #1 of the mix-point (shown above), the
mix junction turns teal with a light green circle to indicate the open mix-point dialog box is
the focus, and the signal is routed to Outputs, both variable and fixed.

Double-click on the Volume control block to adjust the variable output from 0dB to

-100dB with a step resolution of 1dB (see the following volume control) dialog box.

MVC 121 Plus • Operation 24

Figure 34. To Amp - Volume Dialog Box Figure 35. Gain Dialog Box

Double-click on the Gain control block to adjust the fixed output from -24dB to +12dB with
a step resolution of 0.1dB (see figure35).

In the following example, audio from the three inputs is processed individually and arrive
at their separate mix-points. When the individual mix-point mute buttons are released, the
mix-point junctions turn teal to indicate the routing, and all three signals are routed to the
Output, both variable and fixed. Open the individual mix-point dialog boxes to adjust signal
levels to the output.

Figure 36. All Inputs to Output

MVC 121 Plus • Operation 25

Output Channels

There are two stereo Outputs, as shown below. A Volume control block adjusts the Variable
L/R output and a gain control block adjusts the fixed L/R outputs.

Double-click on the Volume control block to adjust the variable output. Double-click on the
Gain control block to adjust the fixed output.

Figure 37. Output Channels

Volume

The Volume control block monitors and adjusts the
variable output from 0dB to -100dB with a step resolution
of 1dB. The meters monitor the output level. The single
level control adjusts both the Left and Right output channels.

The Polarity buttons reverse the polarity of the respective
left and right output signal.

The OK button accepts settings and closes the dialog with a
single click, while the Cancel button ignores changes and
closes the dialog.

MVC 121 Plus • Operation 26

Gain

The Gain control block monitors and adjusts the fixed
output. The channels can be adjusted from -24dB to +12dB
with a step resolution of 0.1dB.

The L/R channels can be adjusted and muted individually unless
they are ganged. When the Gang button is active (red), the
level controls track each other and pressing either Mute button
mutes or unmutes both channels.

The Polarity buttons reverse the polarity of the respective left
and right output signal.

The OK button accepts settings and closes the dialog with a
single click, while the Cancel button ignores changes and
closes the dialog.

MVC 121 Plus • Operation 27

SIS Programming
and Control

This section describes SIS programming and control of the MVC121Plus, including:

• Connection Options

• Command/Response Table for Basic SIS Commands

• Command/Response Table for MVC121Plus DSP SIS Commands

Connection Options

The MVC121Plus can be remotely connected via a host computer or other device (such
as a control system) attached to the rear panel RS-232 port, or the front panel USB Config
port.

The MVC can be set up and controlled using the Extron SIS (Simple Instruction Set
commands, or DSPConfigurator software (see Rear Panel Features on page 4 for
RS-232 pin assignments and details on the configuration and control port connections). For
information on DSPConfigurator see Software Control on page39l.

SIS commands may be executed using the Extron Electronics DataViewer program, which
may be found on the Software Products DVD included with the product.

MVC121Plus RS-232 protocol:

• 38400 baud • no parity • 8 data bits • no flow control • 1 stop bit

NOTE: The RS-232 configuration port requires 38400 baud communication. This is a

higher speed than many other Extron Electronics products use.

The DSP Configurator automatically sets the connection for the appropriate speed.
If using HyperTerminal or a similar application, make sure the PC or control system
connected to these ports is set for 38400 baud.

See Rear Panel Features, for additional details on connecting the RS-232 port.

USB Port Details:

The Extron USB driver must be installed before use. See Install the USB Driver on
page41 for driver installation instructions.

RS-232 Port

The MVC121Plus has a rear panel serial port that can be connected to a host device such
as a computer running the HyperTerminal utility, or the DataViewer utility. The port makes
serial control of the mixer possible. Use the protocol information mentioned previously to
make the connection. Once the connection is made, see Using the Command/Response

Tables on the next page for SIS programming details.

MVC 121 Plus • SIS Programming and Control 28

USB Port (Front Panel)

ASCII to Hex Conversion Table

•

Space

The MVC121Plus has a front panel USB port that can be connected to a host device such
as a computer running the HyperTerminal utility, or the DataViewer utility. The port makes
serial control of the switcher possible. Once the connection is established, see Using the

Command/Response Tables below for SIS programming details.

MVC121Plus-initiated Messages

The MVC initiates messages under specific conditions. No response is required from the
host. The MVC121Plus-initiated messages are listed here (underlined).

© Copyright 2011, Extron Electronics, MVC 121 Plus, Vn.nn,
60-1096-01

Vn.nn is the firmware version number.
The MVC sends the boot and copyright messages under the following circumstances:
If the MVC is off and an RS-232 connection is already set up (the PC is cabled to the MVC
and a serial communication program such as HyperTerminal is open), the connected unit
sends these messages via RS-232 when first powered on.

Using the Command/Response Tables

SIS commands consist of a string (one or more characters per command field). No special
characters are required to begin or end a command sequence. When the
MVC121Plus determines a command is valid, it executes the command and sends
a response to the host device. All responses end with a carriage return and a line feed

(CR/LF = ]), signaling the end of the response character string.

When programming, certain characters are more conveniently represented by their
hexadecimal rather than ASCII values. The following table shows the hexadecimal equivalent
of each ASCII character:

Figure 38. ASCII to Hex Conversion Table

MVC 121 Plus • SIS Programming and Control 29

Error Responses

When the MVC121Plus is unable to execute the command, it returns an error response to
the host. The error response codes and their descriptions are as follows:

Code

E01

E10

E13

E14

E23

Description

Invalid input number

Invalid command

Invalid value (out of range)

Not valid for this configuration

Firmware update failure

Although the MVC uses the same structure for SIS commands, there are two variations.
One is the global command structure documented in the Command/Response Table for

Basic SIS Commands that follows.

The second set of tables for DSP SIS commands uses the command structure outline
beginning with Command/Response Tables for DSP SIS Commands on page35.
While using the same structure of basic SIS commands, they differ in how the software
addresses the individual processor blocks within the MVC121Plus.

Generally the basic SIS commands are used for global configuration such as setting a unit
name, while the Audio SIS commands provide gain, volume, and mute control in the audio
signal chain.

MVC 121 Plus • SIS Programming and Control 30

Command/Response Table for Basic SIS Commands

Symbol Definitions

= CR/LF (carriage return/line feed) (hex 0D 0A)

]

= Carriage return (no line feed, hex 0D)

}

= Space character

•
= Pipe (vertical bar) character

|

E

X1)

X1!
X1@
X1#
X1$
X2@
X2$

= Escape key (hex 1B)

=

= Future capability (not currently available)

X!
X@
X#
X$
X^

X&
X*
X(

Mix-point Input selection

=

Output Volume (variable)

=

On/Off

=

Mix-point gain values increment/decrement

=

Dirty status

=

Output Volume Adjustment Range

=

Soft Limit (Hi) Value must be higher than low soft limit or device responds with E13 error.

=

Soft Limit (Low) Value must be lower than high soft limit or device responds with E13 error.

=

Executive Mode

=

Input selection

=

Output selection

=

Version number Listed to two decimal places (for example, x.xx)

=

Version and Build number The least significant bits is the build number (for example, x.xx.xxxx)

=

Internal temperature Degrees Celsius

=

Verbose/Response mode

=

1 = Mic 1 Mix-point 2 = Mic 2 Mix-point 3 = Line 3 Mix-point

0 (mute) to 100 (max volume) in 1% steps

0 = off/mute 1 = on/unmute

-24 to +12dB in 1 dB steps

0 = RAM has been saved to Flash (OK to power off/reset)
1 = RAM needs to be saved to Flash

0 (no output) to 100 (full output) in 1% steps

0 = Disabled / Full control
1 = Enabled / no front panel control
2 = Enabled / volume control only

1 = Mic 1 2 = Mic 2 3 = Line 3

1 = Variable 2 = Fixed

0 = Tag OFF, Broadcast OFF (no tag in GET command response, always tag

in SET command response)

1 = Tag OFF, Broadcast ON (not tagged, broadcast)
2 = Tag ON, Broadcast OFF
3 = Tag ON, Broadcast ON

Default = 1

X3$

=

Baud rate

NOTE: If ‘tagged responses’ is enabled, all read commands will

return the constant string + the data, similar to setting the value,
for example,

command: ECN} response: Ipn•X1@]

0 = 9600 1 = 19200 2 = 38400 (default) 3 = 115200

MVC 121 Plus • SIS Programming and Control 31

Command/Response Table for Basic MVC121Plus SIS Commands

ASCII Command

Response

Command

(Host to Tuner)

NOTE: Commands can be entered back-to-back in a string, with no spaces. Example: TvprS25*11•3
Upper and lower case may be used interchangeably.

(Tuner to Host)

General Commands

Firmware Version, Part Number, and Model Information

Query firmware version
Query firmware and build

version
Query part number N

Query model name 1I
Query model description 2I

Q
*Q

X1# ]
X1$ ]

60-1096-01 ]

MVC•121•Plus ]
Mixer•Volume•Controller ]

Setup Commands

Set verbose mode
View verbose mode

Key:

=

X#
X1#
X1$

X2$

On/Off 0 = off/mute 1 = on/unmute

=

Version number Listed to two decimal places (for example, x.xx)

=

Version and Build number The least significant bits is the build number (for example, x.xx.xxxx)

Verbose/Response mode 0 = Tag OFF, Broadcast OFF (no tag in GET command response, always tag in SET command response)

E X2$ CV } Vrb X2$ ]
E CV } X# ]

1 = Tag OFF, Broadcast ON (not tagged, broadcast)
2 = Tag ON, Broadcast OFF
3 = Tag ON, Broadcast ON
Default = 1

NOTE: If ‘tagged responses’ is enabled, all read commands will return the constant string + the data,

similar to setting the value, for example, command: ECN} response: Ipn•X1@]

Additional Description

Show the current firmware version.
Show the current firmware and build

version.
Show the unit part number.

Show the model name.

Set verbose/response mode.
View verbose mode

Bi-directional Serial Data Port

NOTE: CP and CV commands apply to both RS-232 and USB ports.

Configure parameters

View parameters

E X3$ CP } Ccp X3$ ]

E CP } Ccp X3$ ]

ZAP Commands (Factory Defaults) and RAM Commands

System reset (factory
default)
Absolute system reset

View internal temperature
status in degrees Celsius

Key:

=

X2@
X3$

Internal temperature Degrees Celsius

=

Baud rate 0 = 9600 1 = 19200 2 = 38400 (default) 3 = 115200

E ZXXX } Zpx ]

E ZQQQ } Zpq ]

20S

Sts20* X2@ ]

MVC 121 Plus • SIS Programming and Control 32

Set baud rate:

0 = 9600
1 = 19200
2 = 38400 (default)
3 = 115200

View baud rate.

Reset system to factory default
except for the baud rate.
Similar to system reset, plus sets
the baud rate to factory default.
View internal temperature in
degrees Celsius.

Command

Commit only RAM to Flash

Query whether RAM needs
to be saved to Flash

Name Commands

Write input name

Read input name

Write output name

Read output name

Key:

=

X^

X1!
X1@

Dirty status 0 = RAM has been saved to Flash (OK to power off/reset)

=

Input selection 1 = Mic 1 2 = Mic 2 3 = Line 3

=

Output selection 1 = Variable 2 = Fixed

Gain Stage Commands

ASCII Command

(Host to Tuner)

Response

(Tuner to Host)

E 2FF } Nvr X^ ]

(responds when done)

E FF } X^ ]

E X1! , name NI } Nmi X1! , name ]

E X1! NI } Vrb mode 0/1:name ]

Vrb mode 2/3:

Nmi X1! , name ]

E X1@ , name NO } Nmo X1@ , name ]

E X1@ NO } Vrb mode 0/1:name ]

Vrb mode 2/3:

Nmo X1@ , name ]

1 = RAM needs to be saved to Flash

Additional Description

0 = RAM has been saved to Flash
(OK to power off/reset)
1 = RAM needs to be saved to
Flash

name = maximum 12 characters.
Invalid characters:
<>”” ; : | \ ?
Read input name.

name = maximum 12 characters.
Invalid characters:
<>“” ; : | \ ?
Read output name.

= ~ , @ ’ [] {}

= ~ , @ ‘ [] {}

Variable Output Mute

Mute output 1Z
Unmute output 0Z
View output mute status Z

Setting Mix Mic/Line Gain or Attenuation Level

Set gain level
Increment (1dB)

Decrement (1dB)
View gain level

X!* X$ G In X!
X! + G In X!

X!- G In X!
X! G

Output Volume Adjustment (Variable Outputs only)

Set output volume
Increment (1dB) + V
Decrement (1dB) – V
View output volume V

Key:

=

X!
X#
X$
X&

Mix-point Input selection 1 = Mic 1 Mix-point 2 = Mic 2 Mix-point 3 = Line 3 Mix-point

=

On/Off 0 = off/mute 1 = on/unmute

=

Mix-point gain values increment/decrement -24 to +12dB in 1 dB steps

=

Output Volume Adjustment Range 0 (no output) to 100 (full output) in 1% steps

X& V Vol X& ]

Amt 1 ]
Amt 0 ]
Amt X# ]

Aud X$ ]

•

Aud X$ ]

•

Aud X$ ]

•

Vrb mode 0/1:
Aud X$ ]

Vrb mode 2/3:
In X! • Aud X$ ]

Vol X& ]
Vol X& ]
Vol X& ]

Mute output
Unmute output
0 = off/mute

1 = on/unmute

Input gain level
Increment gain

Decrement gain
View gain level

Set output volume
Increment output volume
Decrement output volume
View output volume

MVC 121 Plus • SIS Programming and Control 33

Command

ASCII Command

(Host to Tuner)

Set Soft Limits

Set G limits (Mix-points)
Set V limits (volume)
View G limits

View V limits

E G X!*X**X( ARNG } Vrb mode 0/1:X!*X**X( ]
E V X@*X**X( ARNG } Vrb mode 0/1:X@*X**X( ]
E G X! ARNG } Vrb mode 0/1:X**X( ]

E V X@ ARNG }

Executive Mode (Front Panel Lockout)

Disable 0X
Enable (complete lockout) 1X
Enable (lockout except

volume)
Lock status X

2X

Digital Input Commands

Response

(Tuner to Host)

Vrb mode 2/3:ArngG X!*X**X( ]
Vrb mode 0/1: X**X( ]
Vrb mode 2/3: ArngV X@*X**X( ]

E 0 ]
E 1 ]
E 2 ]

E X1) ]

Additional Description

Full front panel control
No front panel control
No front panel control except for

volume
0 = Disabled / Full control
1 = Enabled / no front panel control
2 = Enabled / volume control only

Configure digital input
View digital input

View I/O state

Key:

=

X!
X@
X%
X*
X(

Mix-point Input selection 1 = Mic 1 Mix-point 2 = Mic 2 Mix-point 3 = Line 3 Mix-point

=

Output Volume (variable) 0 (mute) to 100 (max volume) in 1% steps

=

State 0 = Logic Hi (inactive) 1 = Logic Lo (active)

=

Soft Limit (Hi) Value must be higher than low soft limit or device responds with E13 error.

=

Soft Limit (Low) Value must be lower than high soft limit or device responds with E13 error.

E X! * X@ GPIT } Gpit X! * X@ ]
E X! GPIT }

(Vrb mode 2/3:)

X! }

Vrb mode 2/3:

X@* ]

Gpit X! * X@ ]

X% ]

Sio X! * X% ]

Tagged response
Tagged response

Tagged response

MVC 121 Plus • SIS Programming and Control 34

Command/Response Tables for DSP SIS Commands

Digital signal processor (DSP) functions, gain and mute, can be controlled using SIS
commands. These commands follow the same general rules as basic SIS commands, but

the variables (X/) tend to be more complex. Also, a comprehensive understanding of the
audio signal flow is helpful to understanding the commands. The following diagram shows
the specific DSP processors available for SIS commands.

NOTE: The entire signal flow is described in more detail in the section, (see DSP

Processing and Signal Flow on page15).

Figure 39. DSP Processors Addressable via SIS Commands

The DSP Configurator program window addressable commands consist of an input signal
gain control, the mixer matrix, and output volume and gain controls.

Mic/Line input gain control — Provides level adjustment, mute, polarity, and

1

phantom power selection.

Mix-points — Mutes input signals to outputs.

2

Output gain control — The stereo fixed output provides level adjustment and mute.

3

DSP control commands are an extension to SIS commands. They differ only in their data
string and the requirement to send each command with an “AU” suffix.

OID

The OID number consists of five characters and identifies the specific gain processor type
or the mix-point. See table1

<OID> page38 for a complete list.

X6)

— Level Control and Mix-point Selection Tables

MVC 121 Plus • SIS Programming and Control 35

Error Responses

When the MVC121Plus is unable to execute the command, it returns an error response to
the host. The error response codes and their descriptions are as follows:

Error Code

E10

E11

E12

E13

E14

E17

E22

E25

Description

Invalid command

Invalid preset

Invalid port number

Invalid parameter (number is out of range)

Not valid for this configuration

System timed out

Busy

Device is not present

Symbol Definitions

CR/LF (carriage return/line feed) (hex 0D 0A)

=

]

Carriage return (no line feed, hex 0D)

=

}

(use the pipe character, | , for Web browser commands))

Space character

=

•

Pipe (vertical bar) character

=

|

=

E
X6)
X6!

X6@

X6#
X6$

Escape key (hex 1B) (use W instead of Esc for Web browsers)

Gain and trim control or mix-point select

=

Level value:

=

line output fixed gain

Line input gain level value

=

Mic input gain level value

Output volume (variable)

=

Mute status

=

See table1 on page38

-24.0 to +12.0dB (-240 to 120) in 0.1dB increments

Line: -18.0dB to +24.0dB (-180 to 240) in 0.1dB increments.
Mic: -18.0dB to +60.0dB, (-180 to 600) in 0.1dB increments

-100.0dB to 0.0dB, (-1000 to 0) in 0.1dB increments.

0 = unmute 1 = mute

MVC 121 Plus • SIS Programming and Control 36

Command/Response Table for MVC121Plus DSP SIS Commands

Command

ASCII Command

(Host to Tuner)

NOTE: The command format is the same regardless of the control or mix-point selection. The acceptable adjustment range varies

depending on the control or mix-point:

• The mic/line input gain range is -18dB to +60dB (-180 to 600), in 0.1dB increments.

• The line input gain range is -18dB to +24dB (-180 to 240), in 0.1dB increments.

• The fixed output gain range is -24dB to +12dB (-240 to 120), in 0.1dB increments.

All responses are shown with the MVC121Plus in Verbose mode 2 or 3.

Response

Additional Description

(Tuner to Host)

Input Audio Selection and Control

Set line 3 input levels

Example 1: Set line input
3 right to +4.0dB
Example 2: Set line input
3 left to -8.0dB
Set a mic/line input level

Example 1: Set mic input1 to
+40.0dB
Example 2: Set mic input2 to

-12.5dB
Read a line input level
Example: Read line input3 left

channel level

Read a mic/line input level

Example: Read mic input1

E G X6)*X6@ AU} DsGX6)*X6@ ] Set line 3 gain control X6) to a

value of X6@dB.

EG30001*40 AU}
EG30000*– 80 AU}

DsG30001*40 ]
DsG30000*– 80 ]

Line input 3 right channel gain set to
+4.0dB.
Line input 3 left channel gain set to

-8.0dB.

EGX6)*X6@ AU} DsGX6)*X6@ ] Set mic gain control X6) to a value

of X6@dB.

EG40000*400 AU}
E G 40001*–125 AU}

DsG40000*400 ]
DsG40001*–125 ]

Mic input 1 gain set to +40.0dB.
Mic input 2 gain set to -12.5dB.

E G X6) AU} X6@ ] Read input X6) value of X6@dB.
E G 30000AU} 40 ]

E G X6) AU} X6@ ]

E G 40000 AU} 400 ]

Line input 1 left channel gain set to
+4.0dB.

Read mic input X6) value of

X6@dB.

Mic input 1 gain set to +40.0dB.

Output Audio Selection and Control

Set Output Gain (fixed) Levels

Example 1: Set fixed outputleft
channel to +10.5dB
Example 2: Set fixed outputright
channel to -14.0dB

Audio Mute

Mute any input, mix-point or fixed
output.

Example:

Unmute any input, mix-point, or fixed
output.
Read audio mute status of any input,
mix-point, or fixed output.

NOTE: Mixpoint DSP commands are for mute only. The gain control uses standard SIS “G” commands.

Key:

=

X6)
X6@

Gain and trim control or mix-point select

=

Line input gain level value
Mic input gain level value

E G X6)*X6@ AU} DsGX6)*X6@ ]

EG60002*105 AU}
EG60003*– 140 AU}

DsG60002*105 ]
DsG60003*– 140 ]

Set output level gain control X6) to
a value of X6@dB.

Fixed output L gain set to +10.5dB.
Fixed output R gain set to -14.0dB.

E M X6) *1AU} DsM X6)*1] Mute audio processor X6).

E M 20001*1AU} DsM20001*1]

Mute mix-point input 1 to
output2.

E M X6) * 0AU} DsM X6)*0 ] Unmute audio point X6).

E M X6) AU} DsM X6)*X6$ ] X6$: 0 = mute off,

1 = mute on

See table1 on page38

Line: -18.0dB to +24.0dB (-180 to 240) in 0.1dB increments.
Mic: -18.0dB to +60.0dB, (-180 to 600) in 0.1dB increments

MVC 121 Plus • SIS Programming and Control 37

Input Selection

1

Mic/Line Input 1 40000
Mic/Line Input 2 40001
Line input 3 left 30000
Line input 3 right 30001

X6)

Main Mix-point to Fixed Outputs

2

Input 1 to left output 20000
Input 2 to left output 20100
Input 3 to left output 20200
Input 1 to right output 20001
Input 2 to right output 20101
Input 3 to right output 20201

Fixed Output Gain

3

Left channel output 60002
Right channel output 60003

Table 1. X6)

— Level Control and Mix-point Selection Tables <OID>

X6)

X6)

MVC 121 Plus • SIS Programming and Control 38

Software Control

This section describes the control software for the MVC121Plus, including:

• Software Control

• Windows-based Program Control

• DSP Configurator Program

Software Control

The MVC121Plus can be controlled using the DSPConfigurator software, SIS commands
through HyperTerminal or DataViewer.

The MVC has the following connection options:

• RS-232 — One single stack 6-pole, 3.5 mm captive screw connector is used for

bidirectional RS-232 (±5 V) serial control.

See Rear Panel Features on page 4, for additional details on connecting the RS-232
port.

• USB 2.0 — A Mini B-type USB connector located on the front panel provides

high-speed USB 2.0 connectivity to a host computer, backward compatible to 1.0.

Windows-based Program Control

The DSP Configurator control program is compatible with Windows 2000 and later
Windows versions, and provides remote control of the input gain and attenuation, output
volume output adjustment, and other features.

DSP Configurator can control the MVC121Plus via any of the two control ports, RS-232 or
USB.

Download DSP Configuration from the Extron website at www.extron.com.

1. Click DOWNLOAD to view the drop-down menu.

2. Select Software.

3. Select the letter D from the alphabetical list.

4. Scroll to DSP Configurator.

5. Click Download.

MVC 121 Plus • Software Control 39

Installing the DSP Configurator Program

To download DSP Configurator, at www.extron.com:

1. Enter DSP Configurator Software in the search text box (see figure40, 1). When you

enter part of the name, you are able to select it from the drop-down menu.

The DSP Configurator Software page opens (2).

2. Click the Downloads button (3) to access the software application.

3. Click DSP Configurator (4) and follow the on-screen instructions.

By default, the Windows installation creates a
:\Program Files\Extron\DSP_Configurator folder for the DSPConfigurator
program files..

4. Click the Release Notes link (5) to see important information relating to the

DSP Configurator.

Figure 40. DSP Configurator Software Access

5. When the DSP Configurator installation is complete, the USB Installer starts

automatically. It is recommended to install the USB drivers whether they are used
immediately or not.

MVC 121 Plus • Software Control 40

Install the USB Driver

To install the USB driver, follow these instructions.

Figure 41. USB Installer Splash Screen

1. After the DSP Configurator program installation is complete, click Next to proceed.

Figure 42. USB Installation

2. The USB driver installer is launched. When the installer has completed the installation of

the USB drivers, the following screen appears:

MVC 121 Plus • Software Control 41

Figure 43. Successful USB Driver Installation

3. Click Finish.

USB driver installation is complete.

DSP Configurator Program

Starting the Program

1. To run the DSP Configurator Program, click Start > Programs > Extron

Electronics > DSP Configurator > DSP Configurator.

Figure 44. DSP Configurator Start Dialog Box

The DSP Configurator program starts in Emulate mode (see Emulate Mode vs. Live

Mode on page44).

2. Select the device to be configured (MVC 121 Plus).

3. Click OK.

MVC 121 Plus • Software Control 42

.

Figure 45. Select Device (MVC 121 Plus)

4. The program displays the following screen.

Figure 46. MVC 121 DSPConfig (Emulate) Dialog Box

Using the Program

In the DSP Configurator window Emulate mode, audio parameters may be selected, then
transferred to the MVC by going to Live mode (while connected to the MVC121Plus).
Audio settings can also be tailored while connected to the MVC which allows real-time
auditioning of the audio output as adjustments are made.

Help

Select the Help tab for further information about the DSP Configurator program features
and functions.

MVC 121 Plus • Software Control 43

Emulate Mode vs. Live Mode

The DSP Configurator program has two operational modes: Live and Emulate. In live mode,
the program has established a connection and is synced with the MVC121. Changes
affect the device in real-time and changes in the current state of the device are reflected in
the DSP Configurator. In contrast, emulate mode allows the user to work offline, creating or
editing configurations that do not immediately affect MVC121 operation.

The DSP Configurator program always starts in Emulate mode. In emulate mode, the
program provides access to all functions of the MVC121 without connecting to it. The user
can build a configuration from the blank screen, or open an existing file that contains the last
configuration displayed. Settings and adjustments are saved to a configuration file on the
PC. When the saved file is opened in the DSPConfigurator program, the program restores
all settings as the current configuration (emulated if in Emulate mode or live if in Live mode).

Figure 47. Main DSP Configuration Screen at Startup

Live mode can be entered at any time after program launch, either with a blank
configuration, after creating a configuration, or after loading a previously saved configuration
file.

Synchronizing: Pull vs. Push

When switching to live mode after making changes to the current configuration in emulate
mode, either:

• Pull data from the device and update the DSP Configurator program configuration.

This option downloads device settings from the MVC121 and synchronizes it with the
DSP Configurator program overwriting the current DSPConfigurator settings, or

• Push data from the DSPConfigurator program to the device, overwriting settings in the

MVC121.

Live mode can also be used to tailor audio settings in real-time while listening to the audio
output.

MVC 121 Plus • Software Control 44

Selecting Live Mode and Pushing or Pulling a Configuration

To switch from emulate mode to live mode:

1. Click the Mode Live button (see figure47,

to device dialog box opens.

on the previous page

1

). The Connect

Figure 48. Connecting to device

— RS-232

2. If necessary and as desired, click either the:

RS-232 tab (figure48, 1) — To connect to the rear panel RS-232 ports, proceed
to step 3).

USB tab (figure49, 1) — To connection via the front panel configuration
port, proceed to step4).

3. If RS-232 was selected in step 2 (see figure48):

a. Click the Com Port drop-down menu (2) and select the PC comm port

connected to the rear panel RS-232 port.

b. Check the Baud Rate displayed in the comm port selection window (2). If the

baud rate does not match the device rate, click the Baud Rate drop-down menu
and select the desired baud rate. The default is 38400.

c. Click OK (4).

The Synchronize with Device dialog box (see figure 26) appears. Proceed to
step 5.

4. If USB was selected in step 2 (see figure49):

a. Click the USB Device drop-down menu and select MVC 121 (or Extron USB

device, if MVC121 is not available),

b. Click OK.

The Synchronize with Device dialog box (see figure 51 on the next page)
appears. Proceed to step 5.

5. Click either the:

• Pull radio button to configure the DSP Configurator program to match

the device — proceed to step 6,

-or-

• Push radio button to configure the device to match the DSPConfigurator

program — proceed to step 6

Figure 49. Connecting to device

— USB

MVC 121 Plus • Software Control 45

Figure 50. Selecting Live Mode

6. Click OK (see figure50, 1). The program prompts to save the current configuration.

• If Pull is selected, the program updates the currently open file with the

configuration from the device. Proceed to step 7.

• If Push is selected, the program overwrites the device configuration with the

currently open file. Proceed to step 8.

NOTE: In either case, the program and device configuration will now reflect

DSPConfigurator changes in real-time.

7. Click OK (2).

MVC 121 Plus • Software Control 46

The DSP Configurator program updates the current configuration with the configuration
from the MVC121 and is now connected live. Changes to the configuration will be
reflected immediately in the device operation.

8. Click OK (see figure50, 3).

The DSP Configurator program uploads the current file created or opened in Emulate
mode to the MVC121. The file overwrites the configuration of the device, and
DSPConfigurator is now connected live. Changes to the configuration will be reflected
immediately in the device operation.

NOTE: When changes are made to the configuration using DSP Configurator,

the changes are immediately made to the MVC121. However, if the program is
disconnected from the mixer or shut down before the new configuration is saved,
the mixer will revert back to the previously saved configuration.

MVC 121 Plus • Software Control 47

Reference

This section contains reference information for the MVC 121 Plus, including:

• Mounting

• Firmware Loader

• MVC121Plus Hardware Reset Modes

Mounting

The 1U high, quarter rack width, 3-inch deep MVC121Plus stereo mixer can be:

• Set on a table

• Mounted on a rack shelf

• Mounted under a desk or tabletop

• Mounted on a projector bracket

Tabletop Use

Each MVC121Plus comes with rubber feet (not installed). For tabletop use, attach a
self-adhesive rubber foot to each corner of the bottom of the unit.

UL Rack Mounting Guidelines

The following Underwriters Laboratories (UL) guidelines pertain to the safe installation of the
MVC121Plus in a rack.

1. Elevated operating ambient temperature — If installed in a closed or multi-unit rack

assembly, the operating ambient temperature of the rack environment may be greater
than room ambient temperature. Therefore, install the unit in an environment compatible
with the maximum ambient temperature (Tma = +122 °F, +50 °C) specified by Extron.

2. Reduced air flow — Install the equipment in a rack so that the amount of air flow

required for safe operation of the equipment is not compromised.

3. Mechanical loading — Mount the equipment in the rack so that a hazardous

condition is not achieved due to uneven mechanical loading.

4. Circuit overloading — Connect the equipment to the supply circuit and consider the

effect that circuit overloading might have on overcurrent protection and supply wiring.
Appropriate consideration of equipment nameplate ratings should be used when
addressing this concern.

5. Reliable earthing (grounding) — Maintain reliable grounding of rack-mounted

equipment. Pay particular attention to supply connections other than direct connections
to the branch circuit (e.g. use of power strips).

MVC 121 Plus • Reference 48

Rack Mounting

Use 2 mounting holes on

(2) 4-40 x 3/16"
Screws

1U Universal Rack Shelf

Both front false faceplates
use 2 screws.

QuarterRackStandardShelf

1/4 Rack Width Front False
Faceplate

1/2 Rack Width Front False
Faceplate

For optional rack mounting, do not install the rubber feet. Mount the MVC121Plus on a 19”
Universal 1U or Basic rack shelf.

To rack mount the MVC121Plus:

1. If rubber feet were previously installed on the bottom of the MVC121Plus, remove

2. Mount the MVC on the rack shelf, using two 4-40 x 3/16 inch screws in opposite

them.

(diagonal) corners to secure the unit to the shelf.

Furniture Mounting

Figure 51. Mounting the MVC121Plus on a Universal Rack Shelf

3. Install blank panels or other units on the rack shelf.

Furniture mount the MVC (see the following diagram) using the optional mounting kit (Extron
MBU 123, as follows:

1. Attach the selected mounting brackets with the machine screws provided.

2. If feet were previously installed on the bottom of the cabinet, remove them.

3. Hold the unit with the attached brackets against the underside of the table or other

furniture, or against the wall. Mark the location of the screw holes of the bracket on the
mounting surface.

4. Drill 3/32 inch (2 mm) diameter pilot holes, 1/4 inch (6.4 mm) deep in the mounting

surface at the marked screw locations.

5. Insert #8 wood screws into the four pilot holes. Tighten each screw into the mounting

surface until just less than 1/4 inch of the head of the screw protrudes.

6. Align the mounting screws with the slots in the brackets and place the unit against the

surface, with the screws through the bracket slots.

7. Slide the unit slightly forward or back, then tighten all four screws to secure it in place.

MVC 121 Plus • Reference 49

QuarterRackUnderdeskMounting

Firmware Loader

Figure 52. MBU 123, Under-Desk Mounting

The DSPConfigurator program includes a firmware loader
program which allows replacing the firmware without taking
the MVC out of service. Download the desired firmware file
from the Extron website, (see Firmware Updates on page12
for instructions).

To access the firmware uploader:

1. Select Tools, then Firmware Loader.

The Add Device dialog box appears.

2. Enter the IP address of the MVC.

3. Click OK.

NOTE: If the IP has not been changed, the default IP address is: 192.168.255.255

Figure 53. Add Device Dialog Box

The Firmware Loader screen appears.

Figure 54. Firmware Loader Dialog Box

MVC 121 Plus • Reference 50

4. From the toolbar, select File > Open.

5. Locate the downloaded firmware file and click on it.

6. Click Begin on the main screen. The total progress bar tracks

the loading progress.

7. When the upload is finished, exit the program by selecting File

> Exit.

The firmware upload is complete.

MVC121Plus Hardware Reset Modes

MVC121Plus Reset Mode Summary

Mode Mode Activation Result Purpose/Notes

1

Hold the Reset button while
applying power.

NOTE: After a mode 1 reset,

update the MVC121Plus
firmware to the latest
version. DO NOT operate
the firmware version that
results from this mode reset.

Use Factory Firmware

5

Press and hold the Reset
button for about 9 sec. until the

Reset to

Factory Defaults

Power LED blinks three times
(once at 3 sec., again at 6 sec.,
again at 9 sec.), then release and
within 1second press Reset
momentarily (<1sec.).

NOTE: The reset procedure

is aborted if the second
momentary press does not
occur within 1 second.

The MVC121Plus reverts to the
factory default firmware.

Event scripting does not start if the
MVC121Plus is powered on in this
mode. All user files and settings
(drivers, adjustments, IP settings,
etc.) are maintained.

NOTE: If you do not want

to update the firmware, or
perform a mode1 reset by
mistake, cycle power to the
MVC121Plus to return to the
firmware version running prior
to the reset.

Mode 5 performs a complete
reset to factory defaults, except
for firmware:

• All mix-points set muted and set

to 0dB.

• All outputs unmuted and set to

0dB.

• DSP Processing returned to

defaults and bypassed.

• All inputs muted and set to 0dB.

• All presets and group master

memory cleared.

This mode reverts to the
factory default firmware
version if incompatibility
issues arise with user­loaded firmware.

Useful to start over
with configuration
or uploading, and to
replace events.

MVC 121 Plus • Reference 51

Extron Warranty

Extron Electronics warrants this product against defects in materials and workmanship for a period of three years
from the date of purchase. In the event of malfunction during the warranty period attributable directly to faulty
workmanship and/or materials, Extron Electronics will, at its option, repair or replace said products or components,
to whatever extent it shall deem necessary to restore said product to proper operating condition, provided that it is
returned within the warranty period, with proof of purchase and description of malfunction to:

USA, Canada, South America,
and Central America:

Extron Electronics
1230 South Lewis Street
Anaheim, CA 92805
U.S.A.

Europe and Africa:

Extron Europe
Hanzeboulevard 10
3825 PH Amersfoort
The Netherlands

Asia:

Extron Asia Pte Ltd
135 Joo Seng Road, #04-01
PM Industrial Bldg.
Singapore 368363
Singapore

This Limited Warranty does not apply if the fault has been caused by misuse, improper handling care, electrical
or mechanical abuse, abnormal operating conditions, or if modifications were made to the product that were not
authorized by Extron.

Japan:

Extron Electronics, Japan
Kyodo Building, 16 Ichibancho
Chiyoda-ku, Tokyo 102-0082
Japan

China:

Extron China
686 Ronghua Road
Songjiang District
Shanghai 201611
China

Middle East:

Extron Middle East
Dubai Airport Free Zone
F13, PO Box 293666
United Arab Emirates, Dubai

NOTE: If a product is defective, please call Extron and ask for an Application Engineer to receive an RA (Return

Authorization) number. This will begin the repair process.

USA: 714.491.1500 or 800.633.9876 Europe: 31.33.453.4040
Asia: 65.6383.4400 Japan: 81.3.3511.7655

Units must be returned insured, with shipping charges prepaid. If not insured, you assume the risk of loss or damage
during shipment. Returned units must include the serial number and a description of the problem, as well as the
name of the person to contact in case there are any questions.

Extron Electronics makes no further warranties either expressed or implied with respect to the product and its quality,
performance, merchantability, or fitness for any particular use. In no event will Extron Electronics be liable for direct,
indirect, or consequential damages resulting from any defect in this product even if Extron Electronics has been
advised of such damage.

Please note that laws vary from state to state and country to country, and that some provisions of this warranty may
not apply to you.

Contact Information