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Introduction
About the MVC 121
The Extron MVC 121 is an audio mixer and volume controller in
the Extron VersaTools
™
inputs (mono, balanced/unbalanced) with one main line level
input (stereo, balanced/unbalanced). Each mic input and the
main line level input have their own gain control knobs, and the
mixed output also features a volume control knob.
Volume adjustment interval varies with the speed of knob
rotation, i.e., turning the knob slowly will increment the volume
in smaller steps (0.5 dB), and turning the knob quickly will
increment the volume in larger steps (2.5 dB).
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 volume settings are indicated by four LEDs.
The MVC offers RS-232 control of input gain/attenuation, and
control of output volume. RS-232 control also includes the
capability to turn the inputs and output on/off. The latest
firmware can be uploaded using RS-232 and the Extron control
program for Windows
Features
Furniture, rack, and projector mountability — The Extron
MVC 121 can be mounted under a desk or other
furniture, or mounted on a projector lift with optional
brackets. Alternatively, it can be rack mounted on an
optional rack shelf.
Microphone inputs — Built-in switchable microphone amplifier
with 48V phantom power and separate level setting for
each microphone.
Front panel security lockout (executive mode) — The volume
settings for the inputs and the output can be protected
from unauthorized changes by enabling the executive
mode, although the volume settings can still be displayed
by the LEDs when the volume control knobs are turned.
Stand-alone volume controller — The MVC 121 can operate as
a volume controller for the main line level input with
both mic inputs turned off.
RS-232 control — Allows remote control of the MVC using the
Extron Simple Instruction Set
software for Windows
www.camboard.de
1-2
MVC 121 • Introduction
product line that will mix up to two mic
®
.
™
(SIS
™
), the Extron control
®
, or other remote control system.
CAMBOARD Electronics
MVC 121 Mic/Line Mixer
Tel. 07131 911201
Fax 07131 911203
2
Chapter Two
Installation and Operation
Mounting the MVC 121
Rear Panel Features and Cabling
ce-info@camboard.de
Application Diagram
Front Panel Features
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