User Guide
Audio Products:
Mixers and Processors
MVC 121 Plus
Three Input Stereo Mixer with DSP
68-1937-01 Rev.B
05 12
Safety Instructions • English
Warning
This symbol is intended to alert the user of important operating and maintenance (servicing) instructions in the literature provided with the equipment.
Power sources • This equipment should be operated only from the power source indicated on the product. This
equipment is intended to be used with a main power system with a grounded (neutral) conductor. The third
(grounding) pin is a safety feature, do not attempt to bypass or disable it.
This symbol 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.
Power disconnection • To remove power from the equipment safely, remove all power cords from the rear of
the equipment, or the desktop power module (if detachable), or from the power source receptacle (wall plug).
Caution
Read Instructions • Read and understand all safety and operating instructions before using the equipment.
Retain Instructions • The safety instructions should be kept for future reference.
Follow Warnings • Follow all warnings and instructions marked on the equipment or in the user information.
Avoid Attachments • Do not use tools or attachments that are not recommended by the equipment
manufacturer because they may be hazardous.
Consignes de Sécurité • Français
Ce symbole sert à avertir l’utilisateur que la documentation fournie avec le
matériel contient des instructions importantes concernant l’exploitation et la
maintenance (réparation).
Ce symbole sert à avertir l’utilisateur de la présence dans le boîtier
de l’appareil de  tensions dangereuses non isolées posant des risques
d’électrocution.
Attention
Lire les instructions• Prendre connaissance de toutes les consignes de sécurité et d’exploitation avant
d’utiliser le matériel.
Conserver les instructions• Ranger les consignes de sécurité afin de pouvoir les consulter à l’avenir.
Respecter les avertissements • Observer tous les avertissements et consignes marqués sur le matériel ou
présentés dans la documentation utilisateur.
Eviter les pièces de fixation • Ne pas utiliser de pièces de fixation ni d’outils non recommandés par le
fabricant du matériel car cela risquerait de poser certains dangers.
Sicherheitsanleitungen • Deutsch
Power cord protection • Power cords should be routed so that they are not likely to be stepped on or pinched
by items placed upon or against them.
Servicing • Refer all servicing to qualified service personnel. There are no user-serviceable parts inside. To prevent
the risk of shock, do not attempt to service this equipment yourself because opening or removing covers may
expose you to dangerous voltage or other hazards.
Slots and openings • If the equipment has slots or holes in the enclosure, these are provided to prevent
overheating of sensitive components inside. These openings must never be blocked by other objects.
Lithium battery • There is a danger of explosion if battery is incorrectly replaced. Replace it only with the
same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the
manufacturer’s instructions.
Avertissement
Alimentations • Ne faire fonctionner ce matériel qu’avec la source d’alimentation indiquée sur l’appareil. Ce
matériel doit être utilisé avec une alimentation principale comportant un fil de terre (neutre). Le troisième
contact (de mise à la terre) constitue un dispositif de sécurité : n’essayez pas de la contourner ni de la
désactiver.
Déconnexion de l’alimentation• Pour mettre le matériel hors tension sans danger, déconnectez tous les
cordons d’alimentation de l’arrière de l’appareil ou du module d’alimentation de bureau (s’il est amovible) ou
encore de la prise secteur.
Protection du cordon d’alimentation • Acheminer les cordons d’alimentation de manière à ce que personne
ne risque de marcher dessus et à ce qu’ils ne soient pas écrasés ou pincés par des objets.
Réparation-maintenance • Faire exécuter toutes les interventions de réparation-maintenance par un
technicien qualifié. Aucun des éléments internes ne peut être réparé par l’utilisateur. Afin d’éviter tout danger
d’électrocution, l’utilisateur ne doit pas essayer de procéder lui-même à ces opérations car l’ouverture ou le
retrait des couvercles risquent de l’exposer à de hautes tensions et autres dangers.
Fentes et orifices • Si le boîtier de l’appareil comporte des fentes ou des orifices, ceux-ci servent à empêcher les
composants internes sensibles de surchauffer. Ces ouvertures ne doivent jamais être bloquées par des objets.
Lithium Batterie • Il a danger d’explosion s’ll y a remplacment incorrect de la batterie. Remplacer uniquement
avec une batterie du meme type ou d’un ype equivalent recommande par le constructeur. Mettre au reut les
batteries usagees conformement aux instructions du fabricant.
Vorsicht
Dieses Symbol soll dem Benutzer in der im Lieferumfang enthaltenen
Dokumentation besonders wichtige Hinweise zur Bedienung und Wartung
(Instandhaltung) geben.
Stromquellen • Dieses Gerät sollte nur über die auf dem Produkt angegebene Stromquelle betrieben werden.
Dieses Gerät wurde für eine Verwendung mit einer Hauptstromleitung mit einem geerdeten (neutralen) Leiter
konzipiert. Der dritte Kontakt ist für einen Erdanschluß, und stellt eine Sicherheitsfunktion dar. Diese sollte nicht
umgangen oder außer Betrieb gesetzt werden.
Dieses Symbol soll den Benutzer darauf aufmerksam machen, daß im Inneren
des Gehäuses dieses Produktes gefährliche Spannungen, die nicht isoliert sind
und die einen elektrischen Schock verursachen können, herrschen.
Stromunterbrechung • Um das Gerät auf sichere Weise vom Netz zu trennen, sollten Sie alle Netzkabel aus der
Rückseite des Gerätes, aus der externen Stomversorgung (falls dies möglich ist) oder aus der Wandsteckdose
ziehen.
Achtung
Lesen der Anleitungen • Bevor Sie das Gerät zum ersten Mal verwenden, sollten Sie alle Sicherheits-und
Bedienungsanleitungen genau durchlesen und verstehen.
Aufbewahren der Anleitungen • Die Hinweise zur elektrischen Sicherheit des Produktes sollten Sie
aufbewahren, damit Sie im Bedarfsfall darauf zurückgreifen können.
Befolgen der Warnhinweise • Befolgen Sie alle Warnhinweise und Anleitungen auf dem Gerät oder in der
Benutzerdokumentation.
Keine Zusatzgeräte • Verwenden Sie keine Werkzeuge oder Zusatzgeräte, die nicht ausdrücklich vom
Hersteller empfohlen wurden, da diese eine Gefahrenquelle darstellen können.
Instrucciones de seguridad • Español
Este símbolo se utiliza para advertir al usuario sobre instrucciones importantes de operación y mantenimiento (o cambio de partes) que se desean
destacar en el contenido de la documentación suministrada con los equipos.
Este símbolo se utiliza para advertir al usuario sobre la presencia de elementos con voltaje peligroso sin protección aislante, que puedan encontrarse
dentro de la caja o alojamiento del producto, y que puedan representar
riesgo de electrocución.
Precaucion
Leer las instrucciones • Leer y analizar todas las instrucciones de operación y seguridad, antes de usar el
equipo.
Conservar las instrucciones • Conservar las instrucciones de seguridad para futura consulta.
Obedecer las advertencias • Todas las advertencias e instrucciones marcadas en el equipo o en la
documentación del usuario, deben ser obedecidas.
Evitar el uso de accesorios • No usar herramientas o accesorios que no sean especificamente
recomendados por el fabricante, ya que podrian implicar riesgos.
安全须知 • 中文
这个符号提示用户该设备用户手册中有重要的操作和维护说明。
这个符号警告用户该设备机壳内有暴露的危险电压,有触电危险。
注意
阅读说明书
保存说明书
遵守警告 •
避免追加 •
• 用户使用该设备前必须阅读并理解所有安全和使用说明。
• 用 户应保存安全说明书以备将来使用。
用户应遵守产品和用户指南上的所有安全和操作说明。
不要使用该产品厂商没有推荐的工具或追加设备,以避免危险。
Schutz des Netzkabels • Netzkabel sollten stets so verlegt werden, daß sie nicht im Weg liegen und niemand
darauf treten kann oder Objekte darauf- oder unmittelbar dagegengestellt werden können.
Wartung • Alle Wartungsmaßnahmen sollten nur von qualifiziertem Servicepersonal durchgeführt werden.
Die internen Komponenten des Gerätes sind wartungsfrei. Zur Vermeidung eines elektrischen Schocks
versuchen Sie in keinem Fall, dieses Gerät selbst öffnen, da beim Entfernen der Abdeckungen die Gefahr eines
elektrischen Schlags und/oder andere Gefahren bestehen.
Schlitze und Öffnungen • Wenn das Gerät Schlitze oder Löcher im Gehäuse aufweist, dienen diese zur
Vermeidung einer Überhitzung der empfindlichen Teile im Inneren. Diese Öffnungen dürfen niemals von
anderen Objekten blockiert werden.
Litium-Batterie • Explosionsgefahr, falls die Batterie nicht richtig ersetzt wird. Ersetzen Sie verbrauchte Batterien
nur durch den gleichen oder einen vergleichbaren Batterietyp, der auch vom Hersteller empfohlen wird.
Entsorgen Sie verbrauchte Batterien bitte gemäß den Herstelleranweisungen.
Advertencia
Alimentación eléctrica • Este equipo debe conectarse únicamente a la fuente/tipo de alimentación eléctrica
indicada en el mismo. La alimentación eléctrica de este equipo debe provenir de un sistema de distribución
general con conductor neutro a tierra. La tercera pata (puesta a tierra) es una medida de seguridad, no
puentearia ni eliminaria.
Desconexión de alimentación eléctrica • Para desconectar con seguridad la acometida de alimentación
eléctrica al equipo, desenchufar todos los cables de alimentación en el panel trasero del equipo, o desenchufar
el módulo de alimentación (si fuera independiente), o desenchufar el cable del receptáculo de la pared.
Protección del cables de alimentación • Los cables de alimentación eléctrica se deben instalar en lugares
donde no sean pisados ni apretados por objetos que se puedan apoyar sobre ellos.
Reparaciones/mantenimiento • Solicitar siempre los servicios técnicos de personal calificado. En el interior no
hay partes a las que el usuario deba acceder. Para evitar riesgo de electrocución, no intentar personalmente la
reparación/mantenimiento de este equipo, ya que al abrir o extraer las tapas puede quedar expuesto a voltajes
peligrosos u otros riesgos.
Ranuras y aberturas • Si el equipo posee ranuras o orificios en su caja/alojamiento, es para evitar el
sobrecalientamiento de componentes internos sensibles. Estas aberturas nunca se deben obstruir con otros
objetos.
Batería de litio • Existe riesgo de explosión si esta batería se coloca en la posición incorrecta. Cambiar esta
batería únicamente con el mismo tipo (o su equivalente) recomendado por el fabricante. Desachar las baterías
usadas siguiendo las instrucciones del fabricante.
警告
电源 • 该设备只能使用产品上标明的电源。 设备必须使用有地线的供电系统供电。 第三条线(
地线)是安全设施,不能不用或跳过 。
拔掉电源 • 为安全地从设备拔掉电源,请拔掉所有设备后或桌面电源的电源线,或任何接到市电
系统的电源线。
电源线保护 • 妥善布线, 避免被踩踏,或重物挤压。
维护 • 所有维修必须由认证的维修人员进行。 设备内部没有用户可以更换的零件。为避免出现触
电危险不要自己试图打开设备盖子维修该设备。
通风孔 • 有些设备机壳上有通风槽或孔,它们是用来防止机内敏感元件过热。 不要用任何东西
挡住通风孔。
锂电池 • 不正确的更换电池会有爆炸的危险。必须使用与厂家推荐的相同或相近型号的电池。按
照生产厂的建议处理废弃电池。
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. Operation is subject to the following two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received, including interference that may cause undesired operation.
The Class A limits are designed to 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 harmful interference, in which case the
user will be required to correct the interference at his own expense.
NOTE: This unit was tested with shielded cables on the peripheral devices. Shielded cables must be used with
the unit to ensure compliance with FCC emissions limits.
For more information on safety guidelines, regulatory compliances, EMI/EMF compliance, accessibility, and
related topics, click here.
Conventions Used in this Guide
In this user guide, the following are used:
NOTE: A note draws attention to important information.
TIP: A tip provides a suggestion to make working with the application easier.
CAUTION: A caution indicates a potential hazard to equipment or data.
WARNING: A warning warns of things or actions that might cause injury, death, or
other severe consequences.
Commands are written in the fonts shown here:
^AR Merge Scene,,Op1 scene 1,1 ^B 51 ^W^C
[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 mentioned in
this guide, the character “0” is used for the number zero and “O” represents the capital letter “o.”
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.
Copyright
© 2012 Extron Electronics. All rights reserved.
Trademarks
All trademarks mentioned in this guide are the properties of their respective owners.
Contents
Introduction ...................................................... 1
About This Guide................................................. 1
MVC 121 Plus Description................................... 1
MVC 121 Plus Features........................................ 2
MVC 121 Plus Application Diagram..................... 3
Rear Panel Features.............................................. 4
Front Panel Features............................................. 8
Operation......................................................... 11
MVC 121 Plus Operation....................................11
Front Panel Operation.....................................12
Rear Panel Operation......................................12
Power Cycle....................................................13
Firmware Updates...........................................13
Reset Actuator and LED..................................13
Digital input port............................................14
DSP Processing and Signal Flow..........................16
Mic/Line Input Signal Chain.............................16
Filter Processor Block...........................................18
Filter...................................................................18
Mixer..................................................................23
Output Channels................................................28
Volume...........................................................28
Gain...............................................................28
DSP Configurator Program..................................43
Starting the Program.......................................43
Using the Program..........................................44
Help................................................................44
Emulate Mode vs. Live Mode..............................45
Synchronizing: Pull vs. Push.............................45
Selecting Live Mode and Pushing or Pulling a
Configuration................................................46
Reference Information.................................... 49
Specifications......................................................49
Part Numbers and Accessories.............................51
Included Parts.................................................51
Accessories.....................................................51
Mounting...........................................................52
Tabletop Use...................................................52
UL Rack Mounting Guidelines.........................52
Rack Mounting...............................................52
Furniture Mounting.........................................53
Firmware Loader.................................................54
MVC 121 Plus Hardware Reset Modes................56
SIS Programming and Control........................ 29
Connection Options............................................29
RS-232 Port....................................................29
USB Port (front panel).....................................30
MVC 121 Plus-initiated Messages...................30
Using the Command/Response Tables.............30
Error Responses..............................................31
Command/Response Table for Basic SIS
Commands........................................................31
Symbol definitions..........................................31
Command/Response Tables for DSP SIS
Commands........................................................36
Error responses...............................................37
Symbol definitions..........................................37
Table 1. X6) — Level Control and Mix-point
Selection Tables <OID>..................................39
Software Control............................................. 40
Software Control................................................40
Windows-based Program Control.......................40
Installing the DSP Configurator Program.........40
Install the USB Driver.......................................42
MVC 121 Plus • Contents
v
MVC 121 Plus • Contents
vi
Introduction
This section describes this manual and the MVC 121 Plus, including:
•
About This Guide
•
MVC 121 Plus Description
•
MVC 121 Plus Features
•
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 • Introduction
1
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.
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 • Introduction
2
MVC 121 Plus Application Diagram
Extron
XPA 2001-70V
Extron
IN1508
Power
Amplifier
Scaling Presentation
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PC Podcasting/
Recording Station
Figure 1. MVC 121 Plus Application Diagram
MVC 121 Plus • Introduction
3
Installation
This section describes the features and connectors for the MVC 121 Plus:
•
Rear Panel Features
•
Front Panel Features
Rear Panel Features
4
L
POWER
12V
0.4A MAX
MIC
+48V
5
INPUTS
LINE 3
9
OUTPUTS
MVC 121 Plus
L VARIABLE R
R
RESET
1 MIC/LINE
2
L
1
FIXED
R
RS-232
DIGI IN
2
Tx Rx
1
2
3
6
1
2
3
8
7
Figure 2. MVC 121 Plus Rear Panel
a Power connector — Connect the two pole, 3.5 mm captive screw connector from
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:
Smooth
Ridges
POWER
Power Receptacle
A
12V
3A MAX
A
SECTION A–A
Power Supply
Output Cord
DC Power Cord
Captive Screw Connector
Ground
+12 VDC
External
Power Supply
(12 VDC, 1 A )
AC Power Cord
Figure 3.
Power Supply Connection
MVC 121 Plus • Installation
4
CAUTION: Always use a power supply supplied or specified by Extron. Use
of an unauthorized power supply voids all regulatory compliance
certification and may cause damage to the supply and the end
product.
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.
The installation must always be in accordance with the applicable
provisions of National Electrical Code ANSI/NFPA 70, article 75 and the
Canadian Electrical Code part 1, section 16. The power supply shall
not be permanently fixed to building structure or similar structure.
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.
b Mic 1 and 2 +48 V phantom power LED indicators — The LED lights whenever the
corresponding mic phantom power is on and goes off when the phantom power is
off.
c Mic/line inputs 1 and 2 — Up to two mono microphones or line level signals,
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.
1 MIC/LINE
2
Jumper
Balanced MIC
Unbalanced MIC
NOTE: Mic inputs will be evenly mixed into both left and right outputs.
MVC 121 Plus • Installation
5
d Line input 3, left (L) and right (R) — A line level audio source, such as a CD player,
MAIN
wiring.eps
output from a switcher,MVC
DVD121
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).
L
MAIN 3
R
DVD
CSR 6 RCA Adapter
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,
part number 26-575-01, as shown above.
To wire the captive screw connectors to the RCA or 3.5 mm mini phone plugs, see the
following illustrations below.
Tip (L)
Ring (R)
Tip (+)
Sleeve ( )
Sleeve ( )
RCA Connector
3.5 mm Stereo
Plug Connector
Do not tin the wires!
Tip
Sleeve
R
R
Balanced audio
Tip
Sleeve
L
L
Tip
Ring
Sleeves
Tip
Ring
Unbalanced audio
e Variable output left (L) and right (R) — The balanced/unbalanced stereo output
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 the Front Panel Features
section. 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, part number 26-575-01, as shown in the following illustration.
MVC 121 Plus • Installation
6
L
VARIABLE R
Sound System
CSR 6 RCA Adapter
Do not tin the wires!
R
Right
Tip
Ring
Sleeve(s)
Tip
Ring
Unbalanced Stereo Output
Left
R
Left
L
L
Tip
NO GROUND HERE.
Sleeve(s)
Tip
NO GROUND HERE.
Right
Balanced Stereo Output
CAUTION: Connect the sleeve to ground. Connecting the sleeve to a negative
(­­–) terminal will damage the audio output circuits.
f Fixed output left (L) and right (R) — The balanced/unbalanced stereo output from
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
e, variable output connector, for an example application diagram with cabling
instructions and a caution.
g RS-232 — Connect an RS-232 device (control system or PC) to the 6-pole 3.5 mm
captive screw connector for two-way RS-232 communication. Software for
RS-232 control is included with the MVC. See SIS Programming and Control for
information on how to install and use the control software and SIS commands.
Tx Rx
DIGI IN
1
2
RS-232
Transmit (Tx)
Receive (Rx)
Ground (Gnd, )
3
h Digital input (DIGI IN) — A 6-pole 3.5 mm captive screw connector provides three
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.
Do not tin the wires!
_
1
2
3
Digital I/O Wiring
MVC 121 Plus • Installation
7
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).
RS-232
Tx Rx
2
DIGI IN
1
3
i Reset — The recessed reset button is used to access various modes of resets. The
green power LED on the front panel indicates what mode of reset was accessed (see
the MVC 121 Plus Hardware Reset Modes section for additional details).
Front Panel Features
VOLUME
MIX
1
2
3
MIC
MIC
LINE
CONFIG
MVC 121 Plus
MIXER/VOLUME CONTROLLER
1
2
3
4
5
6
7
Figure 4. MVC 121 Plus Front Panel
a Power/Reset LED — Green power indicator lights when the MVC 121 Plus is
operational. The LED also blinks per mode reset (see the Reset Actuator and LED
section).
b Configuration (Config) port — Connect a PC to the USB mini B-type connector for
configuring the MVC using the DSP Configurator software. The MVC 121 Plus USB
driver must be installed prior to using the port.
c Mic 1 gain control — Rotating the encoder screw clockwise increases the gain
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 (f). When the encoder
screw rotation has stopped for three seconds or longer, the LED indicator returns to
the output meter indication.
d Mic 2 gain control — Rotating the encoder screw 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 (f). 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
8
e Line level 3 gain control — Rotating the encoder screw 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 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.
f LED ladder indicator bar — As the mix-point gain or output volume increases or
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
9
g Volume level adjust knob — Rotating the adjustment knob clockwise increases the
output volume, rotating the knob counterclockwise decreases the volume. The LEDs
light from bottom up as the volume level increases.
VOLUME
MVC 121 Plus
MIXER/VOLUME CONTROLLER
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
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 (g) affects the volume range and
turning the input gain control screws (c, d, e 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
10
Operation
This section describes the operation of the MVC 121 Plus, including:
•
MVC 121 Plus Operation
•
DSP Processing/Signal Flow
•
Filter Processor Block
•
Mic/Line Input Signal Chain
•
Mixer
•
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
11
Front Panel Operation
VOLUME
MIX
1
2
3
MIC
MIC
LINE
CONFIG
MVC 121 Plus
MIXER/VOLUME CONTROLLER
1
2
3
4
5
7
6
Figure 5. MVC 121 Plus Front Panel
a Power/Reset LED — Green power indicator lights solid when the MVC is
operational. The LED will blink when the reset button is pressed.
b Configuration connector — The USB 2.0 port uses a mini type-B connector to
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 section 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), and SIS control (see the Software Control section for additional
information).
Rear Panel Operation
4
L
POWER
12V
0.4A MAX
MIC
+48V
5
INPUTS
LINE 3
9
OUTPUTS
L VARIABLE R
R
MVC 121 Plus
RESET
1 MIC/LINE
1
2
L
FIXED
R
RS-232
DIGI IN
2
Tx Rx
1
2
3
6
7
1
2
3
8
Figure 6. MVC 121 Plus Rear Panel
a b c d e f g h — See the Rear Panel Features section for further details.
i Reset — The reset actuator initiates system resets (see the Reset Actuator and LED
section for additional information).
MVC 121 Plus • Operation
12
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 the Software Control section), 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 (b) 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
13
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.
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.
1. From the main structure menu, click Tools > Configure Digital Inputs to access the
Config utility.
2. Select the digital input to configure.
MVC 121 Plus • Operation
14
3. Select the event or ‘trigger’ to configure the input.
4. The fixed functionality of the digital input is set to Mute/Unmute by default.
5. The fixed target mix-point is set to the selected digital input by default.
6. Select Apply to accept the changes.
MVC 121 Plus • Operation
15
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.
4
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 the Software Control section.
Mic/Line 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.
MVC 121 Plus • Operation
16
Fader Handle
Signal Level
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.
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.
•
Filter (FILT) — Up to three filters can be inserted in any combination of High Pass,
Low Pass, Bass & Treble shelving (tone), or Parametric Equalizer.
MVC 121 Plus • Operation
17
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
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 below) to indicate it has been inserted, but is currently bypassed.
Filter
MIc/line inputs 1 and 2 allow a total of five filters per input. Line input 3 allows up to three
filters.
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.
MVC 121 Plus • Operation
18
Figure 7. 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.
Figure 8. 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.
MVC 121 Plus • Operation
19
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 9. 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.
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.
MVC 121 Plus • Operation
20
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 10.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 11.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
21
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 12.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 13.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
22
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 14.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
23
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.
MVC 121 Plus • Operation
24
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).
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.
MVC 121 Plus • Operation
25
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 15.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
26
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, as shown below.
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 16.All Inputs to Output
MVC 121 Plus • Operation
27
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.
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.
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
28
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 Tables for 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.
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 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
29
USB Port (Front Panel)
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:
Space
ASCII to Hex Conversion Table
•
Figure 17.ASCII to Hex Conversion Table
MVC 121 Plus • SIS Programming and Control
30
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
Description
E01
Invalid input number
E10
Invalid command
E13
Invalid value (out of range)
E14
Not valid for this configuration
E23
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 36. 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.
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 =
= =
Escape key (hex 1B)
Future capability (not currently available)
X!
=
Mix-point Input selection
1 = Mic 1 Mix-point
2 = Mic 2 Mix-point
3 = Line 3 Mix-point
X@
X#
=
Output Volume (variable)
0 (mute) to 100 (max volume) in 1% steps
=
On/Off
0 = off/mute
1 = on/unmute
X$
=
Mix-point gain values increment/
decrement
-24 to +12 dB in 1 dB steps
X^
=
Dirty status
0 = RAM has been saved to Flash (OK to power off/reset)
1 = RAM needs to be saved to Flash
X&
X*
X(
X1)
=
Output Volume Adjustment Range
0 (no output) to 100 (full output) in 1% steps
=
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
0 = Disabled / Full control
1 = Enabled / no front panel control
2 = Enabled / volume control only
MVC 121 Plus • SIS Programming and Control
31
X1!
=
Input selection
1 = Mic 1
2 = Mic 2
3 = Line 3
X1@
=
Output selection
1 = Variable
2 = Fixed
X1#
X1$
X2@
X2$
=
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
Verbose/Response mode
Degrees Celsius
=
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
NOTE:
X3$
=
Baud rate
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
32
Command/Response Table for Basic MVC 121 Plus SIS commands
Command
NOTE:
ASCII Command
(Host to Tuner)
Response
(Tuner to Host)
Additional Description
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.
General commands
Firmware Version, Part Number, and Model Information
Query firmware version
Q
Query firmware and build
version
Query part number
Query model name
Query model description
*Q
X1# ]
N
1I
2I
Show the current firmware
version.
Show the current firmware
X1$ ]
and build version.
Show the unit part number.
60-1096-01 ]
Show the model name.
MVC•121•Plus ]
Mixer•Volume•Controller ]
E X2$ CV }
E CV }
Vrb X2$ ]
X# ]
Setup Commands
Set verbose mode
View verbose mode
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 }
E CP }
Ccp X3$ ]
Ccp X3$ ]
Set baud rate:
0 = 9600
1 = 19200
2 = 38400 (default)
3 = 115200
View baud rate.
ZAP Commands (Factory Defaults) and RAM Commands
System reset (factory default)
E ZXXX }
Zpx ]
Absolute system reset
E ZQQQ }
Zpq ]
View internal temperature
status in degrees Celsius
20S
Sts20* X2@ ]
Commit only RAM to Flash
E 2FF }
Nvr X^ ]
(responds when done)
Query whether RAM needs to
be saved to Flash
E FF }
X^ ]
Write input name
E X1! , name NI }
Nmi X1! , name ]
Read input name
E X1! NI }
Write output name
E X1@ , name NO }
Vrb mode 0/1:
name ]
Vrb mode 2/3:
Nmi X1! , name ]
Nmo X1@ , name ]
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.
0 = RAM has been saved to Flash
(OK to power off/reset)
1 = RAM needs to be saved to Flash
Name Commands
name = maximum 12
characters.
Invalid characters: = ~ , @ ’
[ ] { } < >” ” ; : | \ ?
Read input name.
name = maximum 12
characters.
Invalid characters: = ~ , @ ‘
[ ] { } < >“ ” ; : | \ ?
MVC 121 Plus • SIS Programming and Control
33
Command
Read output name
ASCII Command
Response
Additional Description
(Host to Tuner)
(Tuner to Host)
E X1@ NO }
Vrb mode 0/1:
name ]
Vrb mode 2/3:
Nmo X1@ , name ]
Read output name.
Amt 1 ]
Amt 0 ]
Amt X# ]
Mute output
Unmute output
In X! • Aud X$ ]
In X! • Aud X$ ]
Input gain level
Increment gain
In X! • Aud X$ ]
Vrb mode 0/1:
Aud X$ ]
Vrb mode 2/3:
In X! • Aud X$ ]
Decrement gain
View gain level
+ V
– V
V
Vol X& ]
Vol X& ]
Vol X& ]
Vol X& ]
Set output volume
Increment output volume
Decrement output volume
View output volume
E G X!*X**X( ARNG }
E V X@*X**X( ARNG }
E G X! ARNG }
Vrb mode 0/1:X!*X**X( ]
Vrb mode 0/1:X@*X**X( ]
Vrb mode 0/1:X**X( ]
E V X@ ARNG }
Vrb mode 2/3:ArngG X!*X**X( ]
Vrb mode 0/1: X**X( ]
Gain Stage Commands
Variable Output Mute
Mute output
Unmute output
View output mute status
1Z
0Z
Z
0 = off/mute
1 = on/unmute
Setting Mix Mic/Line Gain or Attenuation Level
Set gain level
Increment (1 dB)
Decrement (1 dB)
View gain level
X!* X$ G
X! + G
X!- G
X! G
Output Volume Adjustment (Variable Outputs only)
Set output volume
Increment (1 dB)
Decrement (1 dB)
View output volume
X& V
Set Soft Limits
Set G limits (Mix-points)
Set V limits (volume)
View G limits
View V limits
Vrb mode 2/3: ArngV X@*X**X( ]
Executive Mode (Front Panel Lockout)
Disable
Enable (complete lockout)
Enable (lockout except
volume)
Lock status
0X
1X
2X
E 0 ]
E 1 ]
E 2 ]
Full front panel control
No front panel control
No front panel control except
for volume
X
E X1) ]
0 = Disabled / Full control
1 = Enabled / no front panel control
2 = Enabled / volume control only
MVC 121 Plus • SIS Programming and Control
34
Digital Input Commands
Command
Configure digital input
View digital input
ASCII Command
Response
Additional Description
E X! * X@ GPIT }
E X! GPIT }
Gpit X! * X@ ]
X@* ]
Gpit X! * X@ ]
X% ]
Sio X! * X% ]
Tagged response
Tagged response
(Host to Tuner)
(Vrb mode 2/3:)
View I/O state
X! ]
Vrb mode 2/3:
(Tuner to Host)
X!
X@
=
Digital inputs, 1–3
Inputs 1–3
=
Type of change to monitor
0 = Off (default)
1 = Edge, Hi to Lo
2 = Edge, Lo to Hi
X%
=
State
0 = Logic Hi (inactive)
1 = Logic Lo (active)
Tagged response
3 = Logic level Lo
4 = Logic level Hi
MVC 121 Plus • SIS Programming and Control
35
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,
DSP Processing and Signal Flow on page 16.
1
2
3
4
Figure 18.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.
a Mic/Line input gain control — Provides level adjustment, mute, polarity, and
phantom power selection.
b Mix-points — Mutes input signals to outputs.
c Output gain control — The stereo fixed output provides level adjustment and mute.
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. X6 — Level Control and Mix-point Selection Tables
<OID> for a complete list.
MVC 121 Plus • SIS Programming and Control
36
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
Description
E10
Invalid command
E11
Invalid preset
E12
Invalid port number
E13
Invalid parameter (number is out of range)
E14
Not valid for this configuration
E17
System timed out
E22
Busy
E25
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 =
Escape key (hex 1B) (use W instead of Esc for Web browsers)
X6)
X6!
=
Gain and trim control or mix-point select
See table on page 39
=
Level value:
line output fixed gain
-24.0 to +12.0 dB (-240 to 120) in 0.1 dB increments
X6@
=
Line input gain level value
Mic input gain level value
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
X6#
X6$
=
Output volume (variable)
-100.0 dB to 0.0 dB, (-1000 to 0) in 0.1 dB increments.
=
Mute status
0 = unmute
1 = mute
MVC 121 Plus • SIS Programming and Control
37
Command/Response Table for MVC 121 Plus DSP SIS commands
Command
ASCII Command
(Host to Tuner)
Response
(Tuner to Host)
Additional Description
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.
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@ ]
EG30001*40 AU}
DsG30001*40 ]
EG30000*– 80 AU}
DsG30000*– 80 ]
EGX6)*X6@ AU}
DsGX6)*X6@ ]
EG40000*400 AU}
DsG40000*400 ]
Set line 3 gain control X6) to a
value of X6@ dB.
Line input 3 right channel gain set
to +4.0 dB.
Line input 3 left channel gain set
to -8.0 dB.
Set mic gain control X6) to a
value of X6@ dB.
Mic input 1 gain set to +40.0 dB.
E G 40001*–125 AU}
DsG40001*–125 ]
Mic input 2 gain set to -12.5 dB.
E G X6) AU}
E G 30000AU}
X6@ ]
40 ]
E G X6) AU}
X6@ ]
E G 40000 AU}
400 ]
Read input X6) value of X6@ dB.
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
Set output level gain control X6)
to a value of X6@ dB.
E G X6)*X6@ AU}
DsGX6)*X6@ ]
EG60002*105 AU}
DsG60002*105 ]
EG60003*– 140 AU}
DsG60003*– 140 ]
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.
Unmute audio point X6).
Audio Mute
Mute any input, mix-point or
fixed output.
Example:
Unmute any input, mix-point, E M X6) * 0AU}
DsM X6)*0 ]
or fixed output.
Read audio mute status of
E M X6) AU}
X6$: 0 = mute off,
DsM X6)*X6$ ]
any input, mix-point, or fixed
1 = mute on
output.
NOTE: Mixpoint DSP commands are for mute only. The gain control uses standard SIS “G” commands.
MVC 121 Plus • SIS Programming and Control
38
Table 1.
X6)
— Level Control and Mix-point Selection Tables <OID>
a Input Selection
X6)
Mic/Line Input 1
40000
Mic/Line Input 2
40001
Line input 3 left
30000
Line input 3 right
30001
b Main Mix-point
to Fixed Outputs
X6)
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
c Fixed Output Gain
X6)
Left channel output
60002
Right channel output
60003
MVC 121 Plus • SIS Programming and Control
39
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.
Updates to this program can be downloaded from the Extron website at
www.extron.com.
Installing the DSP Configurator Program
The program is contained on the Extron Software Products disc.
Install the software as follows:
1. Insert the disk into the drive
2. Click the Software tab or software icon.
NOTE: If the DVD setup program does not start automatically, run Launch.exe
from the DVD ROM directory using Windows “My Computer.”
MVC 121 Plus • Software Control
40
Figure 19. DVD Software Menu
3. Scroll to the DSP Configurator program and click the Install text to its right, as
shown in the red boxes below.
Figure 20. DVD Control Software Menu
4. Follow the on-screen instructions. By default, the Windows installation creates a
C:\Program Files\Extron\DSP_Configurator folder for the DSP Configurator
program files.
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
41
Install the USB Driver
To install the USB driver, follow these instructions.
Figure 21.USB Installer Splash Screen
1. After the DSP Configurator program installation is complete, click Next to proceed.
Figure 22. USB Installation
MVC 121 Plus • Software Control
42
2. The USB driver installer is launched. When the installer has completed the installation
of the USB drivers, the following screen appears:
Figure 23. 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.
The DSP Configurator program starts in Emulate mode (see to Emulate Mode vs.
Live Mode).
MVC 121 Plus • Software Control
43
2. Select the device to be configured and then click OK.
.
3. The program displays the following screen.
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
44
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 24.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
45
Selecting Live Mode and Pushing or Pulling a Configuration
To switch from emulate mode to live mode:
1. Click the Mode Live button (see item a below). The Connect to device dialog box
opens.
1
2
2
3a
3b
or
3c
MVC 121 Plus
4a
4b
Figure 25. Selecting Live Mode
2. If necessary and as desired, click either the:
•
RS-232 tab (for connection to the rear panel RS-232 ports — proceed to step 3).
•
USB tab (for connection via the front panel configuration port — proceed to
step 4).
3. If RS-232 was selected in step 2:
a. Click the com port drop-down menu 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. 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.
The Synchronize with Device dialog box (figure 26) appears. Proceed to step 5.
4. If USB was selected in step 2:
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 (figure 26) appears. Proceed to step 5.
5. Click either the:
a. Pull radio button to configure the DSP Configurator program to match
the device — proceed to step 6
-orb. Push radio button to configure the device to match the DSP Configurator
program — proceed to step 6
MVC 121 Plus • Software Control
46
5a
-or5b
6
6
7
8
Figure 26. Selecting Live Mode, continued
6. Click OK. 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.
MVC 121 Plus • Software Control
47
7. Click OK. 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. 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
48
Reference
Information
This section contains reference information for the MVC 121 Plus, including:
•
Specifications
•
Part Numbers and Accessories
•
Mounting
•
Firmware Loader
•
MVC 121 Plus Hardware Reset Modes
Specifications
Audio
Gain����������������������������������������������� Unbalanced output: -6 dB; balanced output: 0 dB
Frequency response������������������������ 20 Hz to 20 kHz, ±0.3 dB
THD + Noise����������������������������������� <0.02% @ 1 kHz, at maximum output level
S/N������������������������������������������������� >100 dB, 20 Hz to 20 kHz, at maximum output, unweighted
Crosstalk���������������������������������������� <-90 dB @ 1 kHz, fully loaded
CMRR�������������������������������������������� >60 dB @ 1 kHz
Audio input
Number/signal type
Microphone inputs������������������� 2 mono, mic/line, balanced/unbalanced
Line input�������������������������������� 1 stereo, line, balanced/unbalanced
Connectors
Microphone inputs������������������� (1) 3.5 mm captive screw connector, 6 pole
Line input�������������������������������� (1) 3.5 mm captive screw connector, 5 pole
Impedance������������������������������������� >10k ohms, balanced/unbalanced, DC coupled
Nominal level��������������������������������� +4 dBu when level is set to 0 dB gain; adjustable from
-60 dBu to +4 dBu (line input)
Maximum level������������������������������� +21 dBu, balanced, when input gain is set to 0 dB
Volume range
Line input�������������������������������� -18 dB to +24 dB, adjustable per input
Mic input��������������������������������� -18 dB to +60 dB, adjustable per input
Mic noise level�������������������������������� <-120 dBV (1 µVrms) at 40 dB gain
Mic phantom power����������������������� +48 VDC, which can be switched on or off
NOTE: 0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV ≈ 2 dBu
MVC 121 Plus • Reference Information
49
Audio processing
D/A conversion������������������������������� 24 bit, 48 kHz sampling
Audio output
Number/signal type������������������������ 2 stereo, line, balanced/unbalanced
Connectors������������������������������������ (2) 3.5 mm captive screw connector, 5 pole
Impedance������������������������������������� 50 ohms unbalanced, 100 ohms balanced
Gain error�������������������������������������� ±0.2 dB channel to channel
Maximum level (Hi-Z)���������������������� >+21 dBu, balanced; >+15 dBu, unbalanced
Control/remote — mixer/volume controller
Serial control port��������������������������� 1 bidirectional RS-232: 3.5 mm captive screw connector, 6
pole (uses 3 poles) (shared with digital input)
Baud rate and protocol������������������� 9600 to 115200 baud, 38400 baud (default), 8 data bits, 1
stop bit, no parity,
no flow control
Serial control pin configuration������� 1 = Tx, 2 = Rx, 3 = GND
USB control port����������������������������� 1 front panel female mini USB B
USB standards�������������������������������� USB 2.0, low speed
Program control����������������������������� Extron control/configuration program for Windows®
Extron Simple Instruction Set (SIS™)
Control — digital input ports
Number/type���������������������������������� 3 digital input (configurable)
Connector�������������������������������������� (1) 3.5 mm captive screw connector, 6 pole (shared with RS232 port, uses 4 poles)
Pin configuration���������������������������� 3 = GND; 4, 5, 6 = digital inputs 1, 2, 3
Digital inputs
Input voltage range����������������� 0-24 VDC
Input impedance���������������������� 10k ohms
Threshold low to high�������������� >2.0 VDC
Threshold high to low�������������� <0.8 VDC
General
Power�������������������������������������������� External
Input: 100-240 VAC, 50-60 Hz
Output: 12 VDC, 1 A
Power consumption����������������������� 4.8 watts
Temperature/humidity�������������������� Storage -40° to +158°F (-40° to +70°C) / 10% to 90%,
noncondensing
Operating +32° to +122°F (0° to +50°C) / 10% to 90%,
noncondensing
Cooling������������������������������������������ Convection, no vents
Mounting
Rack mount����������������������������� Yes, with optional 1U rack shelf
Furniture mount���������������������� Yes, with optional mini under-desk mounting kit
Pole mount������������������������������ Yes, with mini pole mount kit
Enclosure type�������������������������������� Metal
Enclosure dimensions��������������������� 1.7" H x 4.3" W x 3.0" D (1U high, quarter rack wide)
(4.3 cm H x 10.9 cm W x 7.6 cm D)
(Depth excludes connectors and knobs.)
MVC 121 Plus • Reference Information
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Product weight������������������������������� 0.6 lbs (0.3 kg)
Shipping weight����������������������������� 3 lbs (2 kg)
Vibration���������������������������������������� ISTA 1A in carton (International Safe Transit Association)
Regulatory compliance
Safety�������������������������������������� CE, c-UL, UL
EMI/EMC��������������������������������� CE, C-tick, FCC Class A, ICES, VCCI
MTBF��������������������������������������������� 30,000 hours
Warranty���������������������������������������� 3 years parts and labor
NOTE: All nominal levels are at ±10%.
NOTE: Specifications are subject to change without notice.
8.0-083111-D3
Part Numbers and Accessories
Included Parts
These items are included in each MVC 121 Plus order:
Included parts
Replacement part
number
MVC 121 Plus Stereo Mixer
60-1096-01
3.5 mm, 5-pole captive screw connectors w/strain relief
(3)
10-703-12LF
3.5 mm, 6-pole captive screw connectors w/strain relief
(2)
10-319-14LF
12 VDC, 1 A external power supply
70-775-01
DSP Configurator Control Software DVD
Rubber Feet (4)
Nylon tie wraps (5)
Tweeker
MVC 121 Plus Setup Guide
Accessories
These items can be ordered separately:
Adapters, power supplies, labels
Part number
USB A Male to USB Mini B Male Configuration Cable
26-654-06
MBU 123, Under-Desk Mount Kit
70-212-01
RSB 126, Basic Rack Shelf Kit for 6" deep products
60-604-10
RSU 126, Universal Rack Shelf Kit for 6" deep products
60-190-10
MVC 121 Plus • Reference Information
51
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, or
•
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).
Rack Mounting
For optional rack mounting, do not install the rubber feet. Mount the MVC 121 Plus on a
19” Universal 1U or Basic rack shelf (Extron RSU 126, part #60-190-10; or Extron RSB 126,
part #60-604-10).
To rack mount the MVC 121 Plus:
1. If rubber feet were previously installed on the bottom of the MVC 121 Plus, remove
them.
2. Mount the MVC on the rack shelf, using two 4-40 x 3/16 inch screws in opposite
(diagonal) corners to secure the unit to the shelf.
MVC 121 Plus • Reference Information
52
QuarterRackStandardShelf
1U Universal Rack Shelf
1/2 Rack Width Front False
Faceplate
1/4 Rack Width Front False
Faceplate
Both front false faceplates
use 2 screws.
(2) 4-40 x 3/16"
Screws
Use 2 mounting holes on
opposite corners.
Figure 27.Mounting the MVC 121 Plus on a Universal Rack Shelf
3. Install blank panels or other units on the rack shelf.
Furniture Mounting
Furniture mount the MVC (see the following diagram) using the optional mounting kit
(Extron MBU 123, part number 70-212-01), 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 Information
53
QuarterRackUnderdeskMounting
Figure 28.MBU 123, Under-Desk Mounting
Firmware Loader
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 the Firmware Upgrade Page for instructions).
To access the firmware uploader:
1. Select Tools, then Firmware Loader.
2. The Add Device dialog box appears. Type the IP address of the MVC, then press OK.
NOTE: If the IP has not been changed, the default IP address is: 192.168.255.255
MVC 121 Plus • Reference Information
54
The Firmware Loader screen appears.
3. From the toolbar, select File > Open.
4. Locate the downloaded firmware file and click on it.
5. Click Begin on the main screen. The total progress bar
tracks the loading progress.
6. When the upload is finished, exit the program by selecting File > Exit.
The firmware upload is complete.
MVC 121 Plus • Reference Information
55
MVC 121 Plus Hardware Reset Modes
MVC 121 Plus Reset Mode Summary
Mode Mode Activation
Use Factory Firmware
1
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.
Purpose/Notes
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.
This mode reverts to the
factory default firmware
version if incompatibilty
issues arise with userloaded firmware.
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.
5
Reset to
Factory Defaults
Hold the reset button while
applying power.
Result
Press and hold the Reset button for
about 9 sec. until the 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.
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.
Useful to start over
with configuration
or uploading, and to
replace events.
MVC 121 Plus • Reference Information
56
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
1001 East Ball Road
Anaheim, CA 92805
U.S.A.
Japan:
Extron Electronics, Japan
Kyodo Building, 16 Ichibancho
Chiyoda-ku, Tokyo 102-0082
Japan
Europe, Africa, and the Middle
East:
Extron Europe
Hanzeboulevard 10
3825 PH Amersfoort
The Netherlands
China:
Extron China
686 Ronghua Road
Songjiang District
Shanghai 201611
China
Asia:
Extron Asia
135 Joo Seng Road, #04-01
PM Industrial Bldg.
Singapore 368363
Singapore
Middle East:
Extron Middle East
Dubai Airport Free Zone
F12, PO Box 293666
United Arab Emirates, Dubai
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.
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 Asia:+65.6383.4400
Europe:+31.33.453.4040
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.
Extron Headquarters
+1.800.633.9876 (Inside USA/Canada Only)
Extron USA - West
Extron USA - East
+1.714.491.1500+1.919.850.1000
+1.714.491.1517 FAX
+1.919.850.1001 FAX
Extron Europe
+800.3987.6673
(Inside Europe Only)
+31.33.453.4040
+31.33.453.4050 FAX
Extron Asia
+800.7339.8766
(Inside Asia Only)
+65.6383.4400
+65.6383.4664 FAX
Extron Japan
+81.3.3511.7655
+81.3.3511.7656 FAX
© 2012 Extron Electronics All rights reserved.
Extron China
+4000.398766
Inside China Only
+86.21.3760.1568
+86.21.3760.1566 FAX
Extron Middle East
+971.4.2991800
+971.4.2991880 FAX
www.extron.com
Extron Korea
+82.2.3444.1571
+82.2.3444.1575 FAX
Extron India
1800.3070.3777
Inside India Only
+91.80.3055.3777
+91.80.3055.3737 FAX